Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 503 prefixes
784 of the 786 possible NXX blocks are assigned in area code 503 (99.7% of capacity), spread across 63 rate centers and 41 holders. The largest holders are QWEST CORPORATION (222 blocks, 28.3%), ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER (109 blocks, 13.9%), NEW CINGULAR WIRELESS PCS, LLC (71 blocks, 9.1%). Grouped by brand, Lumen accounts for 292 blocks; brand-attributable holders cover 96% of the code, and the rest are CLECs, VoIP wholesalers and regional carriers that trade under their own names. The assignment records here run from 2001-05-08 to 2026-09-03, with 18 blocks handed out in 2006 alone. 367 blocks (47%) are in thousands-block pooling, meaning the block is shared between carriers in 1,000-number lots rather than held whole – which is why a single NXX can serve several carriers at once. 1 assigned block (918) is not yet in service: assigned to a carrier but not open for calls, so a caller ID from one is spoofed. 80 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
784 assigned blocks of 786
63 rate centers
41 holders of record
47% in thousands-block pooling
Largest holders in 503
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| QWEST CORPORATION | Lumen | 222 | 28.3% |
| ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | Ziply Fiber | 109 | 13.9% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 71 | 9.1% |
| T-MOBILE USA, INC. | T-Mobile | 56 | 7.1% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | Verizon | 54 | 6.9% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Allstream | 51 | 6.5% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - OR | AT&T | 34 | 4.3% |
| LEVEL 3 COMMUNICATIONS, LLC - OR | Lumen | 30 | 3.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 29 | 3.7% |
| SPOK, INC. | Spok | 22 | 2.8% |
| LEVEL 3 TELECOM OF OREGON, LLC - OR | Lumen | 22 | 2.8% |
| ONVOY, LLC - OR | Onvoy | 13 | 1.7% |
Names are printed as they appear in the assignment records, which is the legal entity rather than the brand. Holding a block is not the same as serving the numbers in it: portability moves numbers between carriers and pooling splits a block between several.
Rate centers with their own page
Rate centers where at least three blocks are assigned, excluding the numbered metro zone codes. The remainder are in the full table below.
All 784 assigned blocks
One row per NXX. “Pooled” means carriers draw 1,000-number lots from the block rather than holding all 10,000, so a pooled prefix can belong to several carriers at once. “Not in service” means assigned but not yet open for calls – a caller ID from one of those is necessarily spoofed. The holder column gives the brand where the legal entity maps to one; the full legal names are in the holders table above, exactly as NANPA records them.
| Prefix | Holder of record | Rate center | Assigned | Pooled | In service |
|---|---|---|---|---|---|
| 503-200 | AT&T | PORTLAND | 2006-10-17 | yes | yes |
| 503-201 | Verizon | PORTLAND | – | – | yes |
| 503-202 | Spok | PORTLAND | – | – | yes |
| 503-203 | Lumen | PORTLAND | – | – | yes |
| 503-204 | Spok | PORTLAND | – | – | yes |
| 503-205 | Verizon | PORTLAND | – | – | yes |
| 503-206 | Onvoy | PORTLAND | 2006-03-13 | yes | yes |
| 503-207 | Verizon | BEAVERTON | – | yes | yes |
| 503-208 | AT&T | PORTLAND | 2008-10-27 | yes | yes |
| 503-209 | T-Mobile | PORTLAND | – | yes | yes |
| 503-210 | Allstream | CLACKAMAS | – | yes | yes |
| 503-212 | Allstream | CLACKAMAS | – | yes | yes |
| 503-213 | Allstream | BEAVERTON | – | yes | yes |
| 503-214 | Allstream | BEAVERTON | – | yes | yes |
| 503-215 | Lumen | PORTLAND | – | – | yes |
| 503-216 | Lumen | PORTLAND | – | – | yes |
| 503-217 | Allstream | SHERWOOD | – | yes | yes |
| 503-218 | Allstream | STFRD-SNDY | – | yes | yes |
| 503-219 | Lumen | PORTLAND | – | – | yes |
| 503-220 | Lumen | PORTLAND | – | – | yes |
| 503-221 | Lumen | PORTLAND | – | – | yes |
| 503-222 | Lumen | PORTLAND | – | – | yes |
| 503-223 | Lumen | PORTLAND | – | – | yes |
| 503-224 | Lumen | PORTLAND | – | – | yes |
| 503-225 | Lumen | PORTLAND | – | – | yes |
| 503-226 | Lumen | PORTLAND | – | – | yes |
| 503-227 | Lumen | PORTLAND | – | – | yes |
| 503-228 | Lumen | PORTLAND | – | – | yes |
| 503-229 | Lumen | PORTLAND | – | – | yes |
| 503-230 | Lumen | PORTLAND | – | – | yes |
| 503-231 | Lumen | PORTLAND | – | – | yes |
| 503-232 | Lumen | PORTLAND | – | – | yes |
| 503-233 | Lumen | PORTLAND | – | – | yes |
| 503-234 | Lumen | PORTLAND | – | – | yes |
| 503-235 | Lumen | PORTLAND | – | – | yes |
| 503-236 | Lumen | PORTLAND | – | – | yes |
| 503-237 | Spok | PORTLAND | – | – | yes |
| 503-238 | Lumen | PORTLAND | – | – | yes |
| 503-239 | Lumen | PORTLAND | – | – | yes |
| 503-240 | Lumen | PORTLAND | – | – | yes |
| 503-241 | Lumen | PORTLAND | – | – | yes |
| 503-242 | Lumen | PORTLAND | – | – | yes |
| 503-243 | Lumen | PORTLAND | – | – | yes |
| 503-244 | Lumen | PORTLAND | – | – | yes |
| 503-245 | Lumen | PORTLAND | – | – | yes |
| 503-246 | Lumen | PORTLAND | – | – | yes |
| 503-247 | Lumen | PORTLAND | – | – | yes |
| 503-248 | Lumen | PORTLAND | – | – | yes |
| 503-249 | Lumen | PORTLAND | – | – | yes |
| 503-250 | Lumen | PORTLAND | – | yes | yes |
| 503-251 | Lumen | PORTLAND | – | – | yes |
| 503-252 | Lumen | PORTLAND | – | – | yes |
| 503-253 | Lumen | PORTLAND | – | – | yes |
| 503-254 | Lumen | PORTLAND | – | – | yes |
| 503-255 | Lumen | PORTLAND | – | – | yes |
| 503-256 | Lumen | PORTLAND | – | – | yes |
| 503-257 | Lumen | PORTLAND | – | – | yes |
| 503-258 | Lumen | PORTLAND | – | yes | yes |
| 503-259 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-260 | Verizon | PORTLAND | – | – | yes |
| 503-261 | Lumen | PORTLAND | – | yes | yes |
| 503-262 | Lumen | PORTLAND | – | – | yes |
| 503-263 | CANBY TEL. ASSN. | CANBYNEEDY | – | – | yes |
| 503-264 | Verizon | BEAVERTON | – | – | yes |
| 503-265 | AT&T | PORTLAND | – | yes | yes |
| 503-266 | CANBY TEL. ASSN. | CANBYNEEDY | – | – | yes |
| 503-267 | T-Mobile | PORTLAND | – | – | yes |
| 503-268 | AT&T | BEAVERTON | – | yes | yes |
| 503-269 | T-Mobile | SALEM | – | yes | yes |
| 503-270 | AT&T | BEAVERTON | – | yes | yes |
| 503-271 | Spok | PORTLAND | – | – | yes |
| 503-272 | Lumen | GOVENTCAMP | – | yes | yes |
| 503-273 | Lumen | PORTLAND | – | – | yes |
| 503-274 | Lumen | PORTLAND | – | – | yes |
| 503-275 | Lumen | PORTLAND | – | – | yes |
| 503-276 | Lumen | PORTLAND | – | – | yes |
| 503-277 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-278 | Verizon | PORTLAND | 2008-08-05 | yes | yes |
| 503-279 | Lumen | PORTLAND | – | – | yes |
| 503-280 | Lumen | PORTLAND | – | – | yes |
| 503-281 | Lumen | PORTLAND | – | – | yes |
| 503-282 | Lumen | PORTLAND | – | – | yes |
| 503-283 | Lumen | PORTLAND | – | – | yes |
| 503-284 | Lumen | PORTLAND | – | – | yes |
| 503-285 | Lumen | PORTLAND | – | – | yes |
| 503-286 | Lumen | PORTLAND | – | – | yes |
| 503-287 | Lumen | PORTLAND | – | – | yes |
| 503-288 | Lumen | PORTLAND | – | – | yes |
| 503-289 | Lumen | PORTLAND | – | – | yes |
| 503-290 | Verizon | PORTLAND | – | yes | yes |
| 503-291 | Lumen | PORTLAND | – | – | yes |
| 503-292 | Lumen | PORTLAND | – | – | yes |
| 503-293 | Lumen | PORTLAND | – | – | yes |
| 503-294 | Lumen | PORTLAND | – | – | yes |
| 503-295 | Lumen | PORTLAND | – | – | yes |
| 503-296 | Lumen | PORTLAND | – | – | yes |
| 503-297 | Lumen | PORTLAND | – | – | yes |
| 503-298 | Lumen | ASTORIA | 2002-07-25 | yes | yes |
| 503-299 | Lumen | PORTLAND | – | – | yes |
| 503-300 | Charter | BAY CITY | 2008-02-12 | yes | yes |
| 503-301 | Spok | PORTLAND | – | – | yes |
| 503-302 | Verizon | SALEM | – | yes | yes |
| 503-303 | Verizon | CLACKAMAS | – | yes | yes |
| 503-304 | Lumen | SALEM | – | – | yes |
| 503-305 | Verizon | CLACKAMAS | – | yes | yes |
| 503-306 | Lumen | PORTLAND | – | – | yes |
| 503-307 | Verizon | PORTLAND | – | – | yes |
| 503-308 | AT&T | CLATSKANIE | – | yes | yes |
| 503-309 | T-Mobile | PORTLAND | – | yes | yes |
| 503-310 | Verizon | PORTLAND | – | – | yes |
| 503-312 | Verizon | PORTLAND | – | – | yes |
| 503-313 | Verizon | PORTLAND | – | – | yes |
| 503-314 | Verizon | PORTLAND | – | – | yes |
| 503-315 | Lumen | SALEM | – | – | yes |
| 503-316 | Lumen | SALEM | – | – | yes |
| 503-317 | T-Mobile | PORTLAND | – | – | yes |
| 503-318 | Verizon | PORTLAND | – | – | yes |
| 503-319 | Verizon | PORTLAND | – | – | yes |
| 503-320 | Verizon | PORTLAND | – | – | yes |
| 503-321 | Lumen | PORTLAND | – | – | yes |
| 503-322 | Lumen | GARIBALDI | – | – | yes |
| 503-323 | Lumen | PORTLAND | – | – | yes |
| 503-324 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-325 | Lumen | ASTORIA | – | – | yes |
| 503-326 | Lumen | PORTLAND | – | – | yes |
| 503-327 | AT&T | PORTLAND | – | yes | yes |
| 503-328 | Allstream | GRESHAM | – | yes | yes |
| 503-329 | AT&T | PORTLAND | – | – | yes |
| 503-330 | T-Mobile | BEAVERTON | – | yes | yes |
| 503-331 | Lumen | PORTLAND | – | – | yes |
| 503-332 | T-Mobile | BEAVERTON | – | yes | yes |
| 503-333 | AT&T | PORTLAND | 2006-09-21 | yes | yes |
| 503-334 | T-Mobile | PORTLAND | – | yes | yes |
| 503-335 | Lumen | PORTLAND | – | – | yes |
| 503-336 | Comcast | BEAVERTON | 2004-10-04 | yes | yes |
| 503-337 | CASCADE UTILITIES, INC. | ESTACADA | – | – | yes |
| 503-338 | Lumen | ASTORIA | – | yes | yes |
| 503-339 | Lumen | SALEM | – | yes | yes |
| 503-340 | Lumen | PORTLAND | – | – | yes |
| 503-341 | Verizon | PORTLAND | – | – | yes |
| 503-342 | Lumen | CLACKAMAS | – | yes | yes |
| 503-343 | Lumen | CLACKAMAS | – | yes | yes |
| 503-344 | Lumen | CLACKAMAS | – | yes | yes |
| 503-345 | Lumen | PORTLAND | – | yes | yes |
| 503-346 | Lumen | PORTLAND | – | – | yes |
| 503-347 | Verizon | PORTLAND | – | – | yes |
| 503-348 | Verizon | PORTLAND | – | – | yes |
| 503-349 | Verizon | PORTLAND | – | – | yes |
| 503-350 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-351 | Verizon | PORTLAND | – | – | yes |
| 503-352 | Allstream | BEAVERTON | – | yes | yes |
| 503-353 | Lumen | CLACKAMAS | – | – | yes |
| 503-354 | Lumen | TILLAMOOK | 2002-09-20 | yes | yes |
| 503-355 | Lumen | ROCKAWAY | – | – | yes |
| 503-356 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-357 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-358 | T-Mobile | PORTLAND | – | yes | yes |
| 503-359 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-360 | Onvoy | PORTLAND | 2007-10-08 | yes | yes |
| 503-361 | Lumen | SALEM | – | – | yes |
| 503-362 | Lumen | SALEM | – | – | yes |
| 503-363 | Lumen | SALEM | – | – | yes |
| 503-364 | Lumen | SALEM | – | – | yes |
| 503-365 | Lumen | SALEM | – | – | yes |
| 503-366 | Lumen | ST HELENS | – | – | yes |
| 503-367 | AT&T | PORTLAND | 2004-12-08 | yes | yes |
| 503-368 | NEHALEM TELECOMMS, INC. DBA NEHALEM TEL & TEL | NEHALEM | – | – | yes |
| 503-369 | AT&T | ST HELENS | – | yes | yes |
| 503-370 | Lumen | SALEM | – | – | yes |
| 503-371 | Lumen | SALEM | – | – | yes |
| 503-372 | AT&T | BEAVERTON | – | yes | yes |
| 503-373 | Lumen | SALEM | – | – | yes |
| 503-374 | Lumen | TILLAMOOK | 2002-06-17 | yes | yes |
| 503-375 | Lumen | SALEM | – | – | yes |
| 503-376 | Lumen | MCMINNVL | – | yes | yes |
| 503-377 | Lumen | BAY CITY | – | – | yes |
| 503-378 | Lumen | SALEM | – | – | yes |
| 503-379 | Lumen | MCMINNVL | – | – | yes |
| 503-380 | T-Mobile | PORTLAND | – | – | yes |
| 503-381 | T-Mobile | PORTLAND | – | yes | yes |
| 503-382 | AT&T | PORTLAND | – | yes | yes |
| 503-383 | AT&T | SALEM | – | yes | yes |
| 503-384 | Lumen | PORTLAND | – | yes | yes |
| 503-385 | AT&T | SALEM | – | yes | yes |
| 503-386 | Onvoy | KNAPPA | 2008-09-04 | yes | yes |
| 503-387 | AT&T | CLACKAMAS | – | yes | yes |
| 503-388 | AT&T | PORTLAND | 2009-04-06 | yes | yes |
| 503-389 | Verizon | NORTH PL | – | yes | yes |
| 503-390 | Lumen | SALEM | – | – | yes |
| 503-391 | Lumen | SALEM | – | – | yes |
| 503-392 | Lumen | CLOVERDALE | – | – | yes |
| 503-393 | Lumen | SALEM | – | – | yes |
| 503-394 | SCIO MUTUAL TEL. CO. | SCIO | – | – | yes |
| 503-395 | AT&T | RAINIER | – | yes | yes |
| 503-396 | Verizon | ST HELENS | – | yes | yes |
| 503-397 | Lumen | ST HELENS | – | – | yes |
| 503-398 | Lumen | BEAVER | – | – | yes |
| 503-399 | Lumen | SALEM | – | – | yes |
| 503-400 | Lumen | SALEM | 2007-05-10 | yes | yes |
| 503-401 | Lumen | PORTLAND | – | – | yes |
| 503-402 | Lumen | PORTLAND | – | – | yes |
| 503-403 | Verizon | BEAVERTON | – | yes | yes |
| 503-404 | Verizon | STFRD-SNDY | – | yes | yes |
| 503-405 | Verizon | GRESHAM | – | yes | yes |
| 503-406 | Lumen | CLACKAMAS | – | yes | yes |
| 503-407 | Verizon | PORTLAND | – | – | yes |
| 503-408 | Lumen | PORTLAND | – | – | yes |
| 503-409 | T-Mobile | SALEM | – | – | yes |
| 503-410 | T-Mobile | ST HELENS | – | yes | yes |
| 503-412 | Lumen | PORTLAND | – | yes | yes |
| 503-413 | Lumen | PORTLAND | – | yes | yes |
| 503-414 | Lumen | PORTLAND | – | – | yes |
| 503-415 | Lumen | PORTLAND | – | yes | yes |
| 503-416 | Lumen | PORTLAND | – | – | yes |
| 503-417 | Lumen | PORTLAND | – | – | yes |
| 503-418 | Lumen | PORTLAND | – | – | yes |
| 503-419 | Verizon | PORTLAND | – | yes | yes |
| 503-420 | T-Mobile | DALLAS | – | yes | yes |
| 503-421 | T-Mobile | PORTLAND | – | yes | yes |
| 503-422 | T-Mobile | PORTLAND | – | yes | yes |
| 503-423 | Lumen | PORTLAND | – | yes | yes |
| 503-424 | Lumen | BEAVERTON | – | yes | yes |
| 503-425 | Lumen | PORTLAND | – | yes | yes |
| 503-426 | NORTH COUNTY COMMUNICATION CORPORATION - OR | PORTLAND | – | – | yes |
| 503-427 | Lumen | STFRD-SNDY | – | yes | yes |
| 503-428 | AT&T | SALEM | – | yes | yes |
| 503-429 | Ziply Fiber | VERNONIA | – | – | yes |
| 503-430 | AT&T | BEAVERTON | – | yes | yes |
| 503-431 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-432 | AT&T | PORTLAND | – | yes | yes |
| 503-433 | Verizon | NORTH PL | – | yes | yes |
| 503-434 | Ziply Fiber | MCMINNVL | – | – | yes |
| 503-435 | Ziply Fiber | MCMINNVL | – | yes | yes |
| 503-436 | Lumen | CANNON BCH | – | yes | yes |
| 503-437 | T-Mobile | MCMINNVL | – | yes | yes |
| 503-438 | AT&T | ST HELENS | – | yes | yes |
| 503-439 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-440 | Verizon | SEASIDE | – | yes | yes |
| 503-441 | Lumen | PORTLAND | – | – | yes |
| 503-442 | T-Mobile | PORTLAND | 2005-01-26 | yes | yes |
| 503-443 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-444 | Allstream | PORTLAND | – | yes | yes |
| 503-445 | Allstream | PORTLAND | – | yes | yes |
| 503-446 | AT&T | PORTLAND | 2009-07-01 | yes | yes |
| 503-447 | AT&T | NORTH PL | – | yes | yes |
| 503-448 | SCS COMMUNICATIONS AND SECURITY, INC. - OR | AUMSVLTRNR | – | – | yes |
| 503-449 | T-Mobile | PORTLAND | – | yes | yes |
| 503-450 | Lumen | PORTLAND | – | – | yes |
| 503-451 | AT&T | CLACKAMAS | – | yes | yes |
| 503-452 | Lumen | PORTLAND | – | – | yes |
| 503-453 | Ziply Fiber | PORTLAND | – | yes | yes |
| 503-454 | AT&T | STFRD-SNDY | – | yes | yes |
| 503-455 | Lumen | WESTPORT | – | yes | yes |
| 503-456 | Verizon | BEAVERTON | – | – | yes |
| 503-457 | Verizon | TILLAMOOK | – | yes | yes |
| 503-458 | Lumen | KNAPPA | – | – | yes |
| 503-459 | Lumen | PORTLAND | 2002-04-25 | yes | yes |
| 503-460 | Lumen | PORTLAND | – | yes | yes |
| 503-461 | Onvoy | GRANDRONDE | 2018-11-09 | yes | yes |
| 503-462 | AT&T | CLACKAMAS | – | yes | yes |
| 503-463 | Lumen | SALEM | – | – | yes |
| 503-464 | Lumen | PORTLAND | – | yes | yes |
| 503-465 | Ziply Fiber | GRESHAM | – | yes | yes |
| 503-466 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-467 | Allstream | PORTLAND | – | yes | yes |
| 503-468 | Lumen | ASTORIA | 2002-02-07 | yes | yes |
| 503-469 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-470 | T-Mobile | SEASIDE | 2001-12-03 | yes | yes |
| 503-471 | Lumen | PORTLAND | – | – | yes |
| 503-472 | Ziply Fiber | MCMINNVL | – | – | yes |
| 503-473 | Verizon | PORTLAND | – | yes | yes |
| 503-474 | Ziply Fiber | MCMINNVL | – | yes | yes |
| 503-475 | AT&T | PORTLAND | – | – | yes |
| 503-476 | Allstream | NEWBERG | – | yes | yes |
| 503-477 | Verizon | PORTLAND | 2006-12-19 | yes | yes |
| 503-478 | Lumen | PORTLAND | – | – | yes |
| 503-479 | Lumen | CLACKAMAS | – | yes | yes |
| 503-480 | Allstream | SALEM | – | yes | yes |
| 503-481 | T-Mobile | PORTLAND | – | – | yes |
| 503-482 | Lumen | STFRD-SNDY | – | yes | yes |
| 503-483 | Lumen | PACIFIC CY | 2004-04-06 | yes | yes |
| 503-484 | AT&T | PORTLAND | – | yes | yes |
| 503-485 | Allstream | SALEM | – | – | yes |
| 503-486 | Lumen | STFRD-SNDY | – | yes | yes |
| 503-487 | Lumen | NEWBERG | – | yes | yes |
| 503-488 | Lumen | PORTLAND | – | yes | yes |
| 503-489 | Allstream | GRESHAM | – | yes | yes |
| 503-490 | T-Mobile | PORTLAND | – | yes | yes |
| 503-491 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-492 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-493 | Lumen | PORTLAND | – | – | yes |
| 503-494 | Lumen | PORTLAND | – | – | yes |
| 503-495 | AT&T | BEAVERTON | – | – | yes |
| 503-496 | Allstream | CLACKAMAS | – | yes | yes |
| 503-497 | Lumen | PORTLAND | – | – | yes |
| 503-498 | AT&T | STFRD-SNDY | – | yes | yes |
| 503-499 | Lumen | PORTLAND | – | – | yes |
| 503-500 | Charter | PORTLAND | 2009-04-06 | yes | yes |
| 503-501 | AT&T | PORTLAND | 2008-03-10 | yes | yes |
| 503-502 | Verizon | PORTLAND | – | – | yes |
| 503-503 | Onvoy | SHERWOOD | 2024-06-04 | yes | yes |
| 503-504 | Verizon | PORTLAND | – | – | yes |
| 503-505 | Allstream | PORTLAND | 2008-06-03 | yes | yes |
| 503-506 | AT&T | STFRD-SNDY | – | yes | yes |
| 503-507 | Verizon | SALEM | – | – | yes |
| 503-508 | AT&T | SALEM | – | yes | yes |
| 503-509 | Verizon | STAYTON | 2011-07-12 | yes | yes |
| 503-510 | AT&T | SALEM | – | – | yes |
| 503-512 | Lumen | GRESHAM | – | yes | yes |
| 503-513 | Lumen | CLACKAMAS | – | – | yes |
| 503-514 | Spok | PORTLAND | – | – | yes |
| 503-515 | T-Mobile | PORTLAND | – | – | yes |
| 503-516 | T-Mobile | PORTLAND | – | – | yes |
| 503-517 | Allstream | PORTLAND | – | – | yes |
| 503-518 | BEAVER CREEK COOPERATIVE TELEPHONE COMPANY - OR | CLACKAMAS | – | – | yes |
| 503-519 | T-Mobile | PORTLAND | – | yes | yes |
| 503-520 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-521 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-522 | Verizon | PORTLAND | – | – | yes |
| 503-523 | Lumen | BEAVERTON | – | yes | yes |
| 503-524 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-525 | Lumen | PORTLAND | – | – | yes |
| 503-526 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-527 | Spok | PORTLAND | – | – | yes |
| 503-528 | Lumen | PORTLAND | – | yes | yes |
| 503-529 | Spok | PORTLAND | – | – | yes |
| 503-530 | AT&T | BEAVERTON | – | yes | yes |
| 503-531 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-532 | Verizon | BEAVERTON | – | – | yes |
| 503-533 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-534 | Lumen | CLACKAMAS | – | yes | yes |
| 503-535 | AT&T | PORTLAND | – | yes | yes |
| 503-536 | Lumen | BEAVERTON | – | yes | yes |
| 503-537 | Ziply Fiber | NEWBERG | – | yes | yes |
| 503-538 | Ziply Fiber | NEWBERG | – | – | yes |
| 503-539 | AT&T | PORTLAND | – | – | yes |
| 503-540 | Lumen | SALEM | – | – | yes |
| 503-542 | Allstream | PORTLAND | – | yes | yes |
| 503-543 | Lumen | SCAPPOOSE | – | yes | yes |
| 503-544 | T-Mobile | PORTLAND | – | – | yes |
| 503-545 | Verizon | PORTLAND | 2005-09-22 | yes | yes |
| 503-546 | Allstream | PORTLAND | – | – | yes |
| 503-547 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-548 | Allstream | PORTLAND | – | yes | yes |
| 503-549 | Lumen | BEAVERTON | – | yes | yes |
| 503-550 | AT&T | NEWBERG | – | – | yes |
| 503-551 | AT&T | SALEM | – | – | yes |
| 503-552 | Lumen | PORTLAND | – | – | yes |
| 503-553 | Lumen | PORTLAND | – | yes | yes |
| 503-554 | Ziply Fiber | NEWBERG | – | – | yes |
| 503-556 | Lumen | RAINIER | – | – | yes |
| 503-557 | Lumen | CLACKAMAS | – | – | yes |
| 503-558 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-559 | AT&T | SALEM | – | – | yes |
| 503-560 | T-Mobile | MCMINNVL | – | yes | yes |
| 503-561 | Allstream | SALEM | – | – | yes |
| 503-562 | Allstream | SALEM | 2003-05-19 | yes | yes |
| 503-563 | Lumen | STFRD-SNDY | – | yes | yes |
| 503-564 | Lumen | HOOD LAND | 2005-01-28 | yes | yes |
| 503-565 | Onvoy | MCMINNVL | – | yes | yes |
| 503-566 | Lumen | SALEM | – | – | yes |
| 503-567 | Allstream | BEAVERTON | 2009-03-02 | yes | yes |
| 503-568 | AT&T | PORTLAND | 2008-08-21 | yes | yes |
| 503-569 | T-Mobile | SALEM | – | yes | yes |
| 503-570 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-571 | Lumen | CLACKAMAS | – | – | yes |
| 503-572 | T-Mobile | PORTLAND | – | yes | yes |
| 503-573 | Lumen | GRESHAM | – | yes | yes |
| 503-574 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-575 | Verizon | PORTLAND | 2008-11-18 | yes | yes |
| 503-576 | Lumen | SALEM | – | yes | yes |
| 503-577 | Verizon | PORTLAND | – | – | yes |
| 503-578 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-579 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-580 | AT&T | SALEM | – | – | yes |
| 503-581 | Lumen | SALEM | – | – | yes |
| 503-582 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-583 | Verizon | MCMINNVL | 2008-09-08 | yes | yes |
| 503-584 | Lumen | SALEM | – | yes | yes |
| 503-585 | Lumen | SALEM | – | – | yes |
| 503-586 | Allstream | SALEM | – | yes | yes |
| 503-587 | Lumen | SALEM | – | – | yes |
| 503-588 | Lumen | SALEM | – | – | yes |
| 503-589 | Lumen | SALEM | – | – | yes |
| 503-590 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-591 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-592 | Lumen | CANBYNEEDY | – | yes | yes |
| 503-593 | Verizon | PORTLAND | 2005-11-14 | yes | yes |
| 503-594 | Allstream | CLACKAMAS | – | yes | yes |
| 503-595 | Allstream | PORTLAND | – | – | yes |
| 503-596 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-597 | Allstream | BEAVERTON | – | yes | yes |
| 503-598 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-599 | Spok | PORTLAND | – | – | yes |
| 503-600 | ASTOUND BROADBAND, LLC - OR | MOLALLA | 2009-06-19 | yes | yes |
| 503-601 | Allstream | BEAVERTON | – | yes | yes |
| 503-602 | T-Mobile | SALEM | – | yes | yes |
| 503-603 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-604 | Spok | PORTLAND | – | – | yes |
| 503-605 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-606 | Lumen | DALLAS | – | yes | yes |
| 503-607 | Allstream | CLACKAMAS | – | yes | yes |
| 503-608 | Lumen | BEAVERTON | – | yes | yes |
| 503-609 | Bandwidth | CORBETT | 2004-08-13 | yes | yes |
| 503-610 | Verizon | SHERWOOD | – | yes | yes |
| 503-612 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-613 | Verizon | BEAVERTON | – | – | yes |
| 503-614 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-615 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-616 | Verizon | BEAVERTON | – | yes | yes |
| 503-617 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-618 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-619 | Allstream | BEAVERTON | – | yes | yes |
| 503-620 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-621 | Lumen | PORTLAND | – | yes | yes |
| 503-622 | Ziply Fiber | HOOD LAND | – | yes | yes |
| 503-623 | Lumen | DALLAS | – | – | yes |
| 503-624 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-625 | Ziply Fiber | SHERWOOD | – | – | yes |
| 503-626 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-627 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-628 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-629 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-630 | CASCADE UTILITIES, INC. | ESTACADA | – | – | yes |
| 503-631 | CLEAR CREEK MUTUAL TEL. CO. | REDLAND | – | – | yes |
| 503-632 | BEAVER CREEK COOP. TEL. CO. | BEAVER CRK | – | – | yes |
| 503-633 | ST. PAUL COOP. TEL. ASSN. | ST PAUL | – | – | yes |
| 503-634 | MONITOR COOP. TEL. CO. | MONITOR | – | – | yes |
| 503-635 | Lumen | CLACKAMAS | – | – | yes |
| 503-636 | Lumen | CLACKAMAS | – | – | yes |
| 503-637 | CASCADE UTILITIES, INC. | ESTACADA | – | – | yes |
| 503-638 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-639 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-640 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-641 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-642 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-643 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-644 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-645 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-646 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-647 | Lumen | NORTH PL | – | yes | yes |
| 503-648 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-649 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-650 | Lumen | CLACKAMAS | – | – | yes |
| 503-651 | CANBY TEL. ASSN. | CANBYNEEDY | – | – | yes |
| 503-652 | Lumen | CLACKAMAS | – | – | yes |
| 503-653 | Lumen | CLACKAMAS | – | – | yes |
| 503-654 | Lumen | CLACKAMAS | – | – | yes |
| 503-655 | Lumen | CLACKAMAS | – | – | yes |
| 503-656 | Lumen | CLACKAMAS | – | – | yes |
| 503-657 | Lumen | CLACKAMAS | – | – | yes |
| 503-658 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-659 | Lumen | CLACKAMAS | – | – | yes |
| 503-660 | Ziply Fiber | GRESHAM | – | yes | yes |
| 503-661 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-662 | Ziply Fiber | YAMHILL | – | yes | yes |
| 503-663 | Ziply Fiber | GRESHAM | – | yes | yes |
| 503-664 | T-Mobile | BEAVER | 2004-09-17 | yes | yes |
| 503-665 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-666 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-667 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-668 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-669 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-670 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-671 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-672 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-673 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-674 | Ziply Fiber | GRESHAM | – | – | yes |
| 503-675 | Lumen | CLACKAMAS | – | – | yes |
| 503-676 | AT&T | GRESHAM | – | yes | yes |
| 503-677 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-678 | Lumen | AURORA | – | yes | yes |
| 503-679 | Verizon | PORTLAND | – | – | yes |
| 503-680 | Verizon | PORTLAND | – | – | yes |
| 503-681 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-682 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-683 | AT&T | CLACKAMAS | – | yes | yes |
| 503-684 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-685 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-686 | AT&T | BEAVERTON | – | yes | yes |
| 503-687 | PACIFIC WAVE COMMUNICATIONS | MCMINNVL | – | – | yes |
| 503-688 | Allstream | PORTLAND | – | yes | yes |
| 503-689 | AT&T | SALEM | – | yes | yes |
| 503-690 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-691 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-692 | Ziply Fiber | STFRD-SNDY | – | – | yes |
| 503-693 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-694 | Lumen | CHARBONNEU | – | yes | yes |
| 503-695 | CASCADE UTILITIES, INC. | CORBETT | – | – | yes |
| 503-696 | Verizon | BEAVERTON | – | – | yes |
| 503-697 | Lumen | CLACKAMAS | – | – | yes |
| 503-698 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-699 | Lumen | CLACKAMAS | – | – | yes |
| 503-701 | AT&T | PORTLAND | – | – | yes |
| 503-702 | AT&T | PORTLAND | – | – | yes |
| 503-703 | AT&T | PORTLAND | – | – | yes |
| 503-704 | AT&T | PORTLAND | – | – | yes |
| 503-705 | AT&T | PORTLAND | – | – | yes |
| 503-706 | AT&T | PORTLAND | – | – | yes |
| 503-707 | Verizon | BEAVERTON | – | yes | yes |
| 503-708 | AT&T | PORTLAND | – | – | yes |
| 503-709 | AT&T | PORTLAND | – | – | yes |
| 503-710 | Verizon | WOODBURN | – | yes | yes |
| 503-712 | Verizon | BEAVERTON | – | – | yes |
| 503-713 | Lumen | BEAVERTON | – | yes | yes |
| 503-714 | Bandwidth | DAYTON | – | yes | yes |
| 503-715 | Lumen | PORTLAND | – | yes | yes |
| 503-716 | Verizon | BEAVERTON | – | yes | yes |
| 503-717 | Lumen | SEASIDE | – | yes | yes |
| 503-718 | Allstream | BEAVERTON | – | yes | yes |
| 503-719 | AT&T | PORTLAND | 2008-04-22 | yes | yes |
| 503-720 | AT&T | PORTLAND | – | – | yes |
| 503-721 | Lumen | PORTLAND | – | – | yes |
| 503-722 | Lumen | CLACKAMAS | – | – | yes |
| 503-723 | Lumen | CLACKAMAS | – | – | yes |
| 503-724 | AT&T | PORTLAND | 2006-08-08 | yes | yes |
| 503-725 | Lumen | PORTLAND | – | – | yes |
| 503-726 | Allstream | BEAVERTON | – | yes | yes |
| 503-727 | Lumen | PORTLAND | – | – | yes |
| 503-728 | Ziply Fiber | CLATSKANIE | – | yes | yes |
| 503-729 | Verizon | PORTLAND | 2006-10-23 | yes | yes |
| 503-730 | Verizon | PORTLAND | – | – | yes |
| 503-731 | Lumen | PORTLAND | – | – | yes |
| 503-732 | Lumen | BEAVER CRK | – | yes | yes |
| 503-733 | Lumen | PORTLAND | – | – | yes |
| 503-734 | Lumen | PORTLAND | – | yes | yes |
| 503-735 | Lumen | PORTLAND | – | yes | yes |
| 503-736 | Lumen | PORTLAND | – | – | yes |
| 503-737 | Lumen | PORTLAND | – | yes | yes |
| 503-738 | Lumen | SEASIDE | – | yes | yes |
| 503-739 | AT&T | SEASIDE | – | yes | yes |
| 503-740 | T-Mobile | PORTLAND | – | – | yes |
| 503-741 | T-Mobile | ASTORIA | – | yes | yes |
| 503-742 | Lumen | CLACKAMAS | – | yes | yes |
| 503-743 | Ziply Fiber | AUMSVLTRNR | – | yes | yes |
| 503-744 | Onvoy | CLACKAMAS | – | yes | yes |
| 503-745 | Verizon | PORTLAND | – | – | yes |
| 503-746 | AT&T | BEAVERTON | – | yes | yes |
| 503-747 | AT&T | BEAVERTON | – | yes | yes |
| 503-748 | Allstream | BEAVERTON | – | yes | yes |
| 503-749 | Ziply Fiber | AUMSVLTRNR | – | yes | yes |
| 503-750 | T-Mobile | PORTLAND | – | – | yes |
| 503-751 | Lumen | DALLAS | – | yes | yes |
| 503-752 | T-Mobile | PORTLAND | – | yes | yes |
| 503-753 | T-Mobile | PORTLAND | – | yes | yes |
| 503-754 | T-Mobile | PORTLAND | – | yes | yes |
| 503-755 | Lumen | JEWELL | – | yes | yes |
| 503-756 | T-Mobile | PORTLAND | – | yes | yes |
| 503-757 | T-Mobile | PORTLAND | – | yes | yes |
| 503-758 | Verizon | PORTLAND | 2005-08-16 | yes | yes |
| 503-759 | MOLALLA TEL. CO. | MOLALLA | – | – | yes |
| 503-760 | Lumen | PORTLAND | – | – | yes |
| 503-761 | Lumen | PORTLAND | – | – | yes |
| 503-762 | Lumen | PORTLAND | – | – | yes |
| 503-763 | Lumen | SALEM | – | – | yes |
| 503-764 | Allstream | PORTLAND | 2005-10-12 | yes | yes |
| 503-765 | AT&T | CLACKAMAS | – | yes | yes |
| 503-766 | AT&T | GRESHAM | – | yes | yes |
| 503-767 | STAYTON COOP. TEL. CO. | STAYTON | – | – | yes |
| 503-768 | Lumen | PORTLAND | – | – | yes |
| 503-769 | STAYTON COOP. TEL. CO. | STAYTON | – | – | yes |
| 503-770 | Lumen | CHARBONNEU | – | yes | yes |
| 503-771 | Lumen | PORTLAND | – | – | yes |
| 503-772 | Lumen | PORTLAND | – | – | yes |
| 503-773 | Lumen | NORTH PL | – | yes | yes |
| 503-774 | Lumen | PORTLAND | – | – | yes |
| 503-775 | Lumen | PORTLAND | – | – | yes |
| 503-776 | Lumen | AURORA | – | yes | yes |
| 503-777 | Lumen | PORTLAND | – | – | yes |
| 503-778 | Lumen | PORTLAND | – | yes | yes |
| 503-779 | Allstream | SALEM | – | yes | yes |
| 503-780 | AT&T | PORTLAND | – | – | yes |
| 503-781 | AT&T | PORTLAND | – | – | yes |
| 503-782 | Lumen | PACIFIC CY | 2005-02-09 | yes | yes |
| 503-783 | Allstream | STFRD-SNDY | – | yes | yes |
| 503-784 | AT&T | PORTLAND | – | – | yes |
| 503-785 | Lumen | CLACKAMAS | – | yes | yes |
| 503-786 | Lumen | CLACKAMAS | – | – | yes |
| 503-787 | Lumen | FALLS CITY | – | yes | yes |
| 503-788 | Lumen | PORTLAND | – | – | yes |
| 503-789 | AT&T | PORTLAND | – | – | yes |
| 503-790 | Lumen | PORTLAND | – | – | yes |
| 503-791 | AT&T | ASTORIA | – | yes | yes |
| 503-792 | GERVAIS TEL. CO. | GERVAIS | – | – | yes |
| 503-793 | T-Mobile | PORTLAND | – | yes | yes |
| 503-794 | Lumen | CLACKAMAS | – | – | yes |
| 503-795 | Lumen | PORTLAND | – | – | yes |
| 503-796 | Lumen | PORTLAND | – | – | yes |
| 503-797 | Lumen | PORTLAND | – | – | yes |
| 503-798 | Allstream | SALEM | – | yes | yes |
| 503-799 | AT&T | PORTLAND | – | – | yes |
| 503-800 | ASTOUND BROADBAND, LLC - OR | GERVAIS | 2009-06-19 | yes | yes |
| 503-801 | AT&T | TILLAMOOK | – | yes | yes |
| 503-802 | Allstream | PORTLAND | – | – | yes |
| 503-803 | AT&T | PORTLAND | – | – | yes |
| 503-804 | AT&T | PORTLAND | – | – | yes |
| 503-805 | AT&T | PORTLAND | – | – | yes |
| 503-806 | AT&T | PORTLAND | – | – | yes |
| 503-807 | AT&T | PORTLAND | – | – | yes |
| 503-808 | Allstream | PORTLAND | – | yes | yes |
| 503-809 | T-Mobile | NORTH PL | – | yes | yes |
| 503-810 | T-Mobile | PORTLAND | – | – | yes |
| 503-812 | Verizon | TILLAMOOK | – | yes | yes |
| 503-813 | Lumen | PORTLAND | – | – | yes |
| 503-814 | Allstream | SALEM | 2008-09-26 | yes | yes |
| 503-815 | Lumen | TILLAMOOK | – | – | yes |
| 503-816 | AT&T | PORTLAND | – | – | yes |
| 503-817 | Spok | PORTLAND | – | – | yes |
| 503-818 | Spok | PORTLAND | – | – | yes |
| 503-819 | AT&T | PORTLAND | – | – | yes |
| 503-820 | Verizon | PORTLAND | – | yes | yes |
| 503-821 | Verizon | PORTLAND | – | yes | yes |
| 503-822 | Lumen | SHERWOOD | – | yes | yes |
| 503-823 | Lumen | PORTLAND | – | – | yes |
| 503-824 | COLTON TEL. CO. | COLTON | – | – | yes |
| 503-825 | AT&T | SHERWOOD | – | yes | yes |
| 503-826 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-827 | Lumen | PORTLAND | – | – | yes |
| 503-828 | Lumen | BEAVERTON | – | yes | yes |
| 503-829 | MOLALLA TEL. CO. | MOLALLA | – | – | yes |
| 503-830 | AT&T | PORTLAND | – | – | yes |
| 503-831 | Lumen | DALLAS | – | yes | yes |
| 503-832 | Onvoy | STFRD-SNDY | – | yes | yes |
| 503-833 | Lumen | PORTLAND | – | yes | yes |
| 503-834 | CASCADE UTILITIES, INC. | ESTACADA | – | – | yes |
| 503-835 | Ziply Fiber | AMITY | – | – | yes |
| 503-836 | Lumen | ASTORIA | 2001-05-08 | yes | yes |
| 503-837 | Onvoy | DALLAS | – | yes | yes |
| 503-838 | Lumen | DALLAS | – | – | yes |
| 503-839 | AT&T | PORTLAND | 2006-07-28 | yes | yes |
| 503-840 | Lumen | BEAVERTON | – | yes | yes |
| 503-841 | T-Mobile | PORTLAND | 2005-10-21 | yes | yes |
| 503-842 | Lumen | TILLAMOOK | – | – | yes |
| 503-843 | Lumen | SHERIDAN | – | yes | yes |
| 503-844 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-845 | MT. ANGEL TEL. CO. | MOUNTANGEL | – | – | yes |
| 503-846 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-847 | AT&T | PORTLAND | 2008-11-19 | yes | yes |
| 503-848 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-849 | T-Mobile | PORTLAND | – | yes | yes |
| 503-850 | Lumen | CLACKAMAS | – | yes | yes |
| 503-851 | T-Mobile | SALEM | – | – | yes |
| 503-852 | Lumen | CARLTON | – | yes | yes |
| 503-853 | Verizon | PORTLAND | 2006-02-24 | yes | yes |
| 503-854 | Ziply Fiber | DETROIT | – | yes | yes |
| 503-855 | Lumen | STFRD-SNDY | – | yes | yes |
| 503-856 | Lumen | SALEM | – | yes | yes |
| 503-857 | Lumen | MCMINNVL | – | yes | yes |
| 503-858 | Lumen | BEAVERTON | – | yes | yes |
| 503-859 | PEOPLES TEL. CO. | LYONS | – | – | yes |
| 503-860 | AT&T | PORTLAND | – | – | yes |
| 503-861 | Lumen | WARRENTON | – | yes | yes |
| 503-862 | Lumen | SHERWOOD | – | yes | yes |
| 503-863 | AT&T | PORTLAND | 2006-10-17 | yes | yes |
| 503-864 | Ziply Fiber | DAYTON | – | yes | yes |
| 503-865 | Lumen | PORTLAND | – | – | yes |
| 503-866 | AT&T | PORTLAND | – | yes | yes |
| 503-867 | Verizon | PORTLAND | 2006-08-17 | yes | yes |
| 503-868 | Ziply Fiber | GRAND IS | – | yes | yes |
| 503-869 | AT&T | PORTLAND | – | – | yes |
| 503-870 | Spok | PORTLAND | – | – | yes |
| 503-871 | Verizon | SALEM | – | – | yes |
| 503-872 | Lumen | PORTLAND | – | – | yes |
| 503-873 | Ziply Fiber | SILVERTON | – | – | yes |
| 503-874 | Ziply Fiber | SILVERTON | – | yes | yes |
| 503-875 | AT&T | PORTLAND | 2006-07-20 | yes | yes |
| 503-876 | Lumen | WILLAMINA | – | yes | yes |
| 503-877 | Verizon | SALEM | 2009-08-11 | yes | yes |
| 503-878 | Verizon | STFRD-SNDY | – | yes | yes |
| 503-879 | Lumen | GRANDRONDE | – | yes | yes |
| 503-880 | AT&T | PORTLAND | – | – | yes |
| 503-881 | AT&T | SALEM | – | – | yes |
| 503-882 | Lumen | CLACKAMAS | – | yes | yes |
| 503-883 | Allstream | MCMINNVL | – | yes | yes |
| 503-884 | T-Mobile | SALEM | – | yes | yes |
| 503-885 | Ziply Fiber | STFRD-SNDY | – | yes | yes |
| 503-886 | Lumen | PORTLAND | – | yes | yes |
| 503-887 | AT&T | PORTLAND | – | – | yes |
| 503-888 | T-Mobile | PORTLAND | – | – | yes |
| 503-889 | AT&T | PORTLAND | – | yes | yes |
| 503-890 | T-Mobile | PORTLAND | – | yes | yes |
| 503-891 | T-Mobile | PORTLAND | – | yes | yes |
| 503-892 | Lumen | PORTLAND | – | – | yes |
| 503-893 | IP HORIZON LLC | PORTLAND | 2009-07-10 | yes | yes |
| 503-894 | Verizon | PORTLAND | 2009-08-28 | yes | yes |
| 503-895 | Onvoy | HOOD LAND | 2006-11-15 | yes | yes |
| 503-896 | Verizon | PORTLAND | 2007-09-20 | yes | yes |
| 503-897 | Ziply Fiber | MILL CITY | – | yes | yes |
| 503-898 | BEAVER CREEK COOPERATIVE TELEPHONE COMPANY - OR | REDLAND | 2006-02-22 | yes | yes |
| 503-899 | Lumen | NEWBERG | – | yes | yes |
| 503-900 | ASTOUND BROADBAND, LLC - OR | LYONS | 2009-06-19 | yes | yes |
| 503-901 | T-Mobile | PORTLAND | – | yes | yes |
| 503-902 | ASTOUND BROADBAND, LLC - OR | WOODBURN | 2009-06-03 | yes | yes |
| 503-903 | Spok | PORTLAND | – | – | yes |
| 503-904 | Spok | PORTLAND | – | – | yes |
| 503-905 | Allstream | CLACKAMAS | – | yes | yes |
| 503-906 | Allstream | BEAVERTON | – | yes | yes |
| 503-907 | Allstream | GRESHAM | – | yes | yes |
| 503-908 | Comcast | CLACKAMAS | – | yes | yes |
| 503-909 | Lumen | PORTLAND | – | – | yes |
| 503-910 | Verizon | SALEM | – | – | yes |
| 503-912 | Comcast | GRESHAM | 2006-10-05 | yes | yes |
| 503-913 | AT&T | PORTLAND | – | – | yes |
| 503-914 | T-Mobile | PORTLAND | – | yes | yes |
| 503-915 | AT&T | PORTLAND | 2008-12-18 | yes | yes |
| 503-916 | Lumen | PORTLAND | – | yes | yes |
| 503-917 | T-Mobile | DALLAS | – | yes | yes |
| 503-918 | Onvoy | GRESHAM | 2026-09-03 | yes | no |
| 503-919 | AT&T | CLACKAMAS | – | yes | yes |
| 503-920 | Spok | PORTLAND | – | – | yes |
| 503-921 | Spok | PORTLAND | – | – | yes |
| 503-922 | Verizon | PORTLAND | 2005-05-18 | yes | yes |
| 503-923 | ELTOPIA COMMUNICATIONS LLC - OR | BEAVERTON | – | – | yes |
| 503-924 | Allstream | BEAVERTON | – | yes | yes |
| 503-925 | Ziply Fiber | SHERWOOD | – | yes | yes |
| 503-926 | AT&T | PORTLAND | 2008-09-10 | yes | yes |
| 503-927 | T-Mobile | PORTLAND | 2006-01-12 | yes | yes |
| 503-928 | AT&T | PORTLAND | 2006-08-08 | yes | yes |
| 503-929 | AT&T | PORTLAND | 2005-11-03 | yes | yes |
| 503-930 | Verizon | SALEM | – | – | yes |
| 503-931 | AT&T | SALEM | – | – | yes |
| 503-932 | T-Mobile | SALEM | – | yes | yes |
| 503-933 | AT&T | PORTLAND | 2006-07-28 | yes | yes |
| 503-934 | Lumen | SALEM | 2005-09-12 | yes | yes |
| 503-935 | AT&T | PORTLAND | 2007-03-12 | yes | yes |
| 503-936 | Verizon | PORTLAND | – | – | yes |
| 503-937 | Verizon | PORTLAND | – | – | yes |
| 503-938 | Spok | PORTLAND | – | – | yes |
| 503-939 | Verizon | PORTLAND | – | – | yes |
| 503-940 | Spok | PORTLAND | – | – | yes |
| 503-941 | Lumen | BEAVERTON | – | yes | yes |
| 503-942 | Spok | PORTLAND | – | – | yes |
| 503-943 | Allstream | PORTLAND | – | yes | yes |
| 503-944 | Lumen | PORTLAND | – | yes | yes |
| 503-945 | Lumen | SALEM | – | – | yes |
| 503-946 | AT&T | PORTLAND | – | yes | yes |
| 503-947 | Lumen | SALEM | – | – | yes |
| 503-948 | Lumen | PORTLAND | – | – | yes |
| 503-949 | Verizon | SALEM | – | – | yes |
| 503-951 | Verizon | WOODBURN | – | yes | yes |
| 503-952 | Lumen | PORTLAND | – | yes | yes |
| 503-953 | Verizon | PORTLAND | 2007-08-08 | yes | yes |
| 503-954 | AT&T | PORTLAND | 2007-03-12 | yes | yes |
| 503-955 | Spok | PORTLAND | – | – | yes |
| 503-956 | Verizon | PORTLAND | 2005-06-14 | yes | yes |
| 503-957 | T-Mobile | PORTLAND | – | yes | yes |
| 503-960 | AT&T | PORTLAND | 2007-02-26 | yes | yes |
| 503-961 | Allstream | PORTLAND | – | yes | yes |
| 503-962 | Lumen | PORTLAND | – | yes | yes |
| 503-963 | Lumen | PORTLAND | – | – | yes |
| 503-964 | Verizon | PORTLAND | 2009-07-10 | yes | yes |
| 503-965 | Lumen | PACIFIC CY | – | – | yes |
| 503-966 | Onvoy | WESTPORT | 2007-07-20 | yes | yes |
| 503-967 | Allstream | SALEM | – | yes | yes |
| 503-968 | Ziply Fiber | BEAVERTON | – | – | yes |
| 503-969 | T-Mobile | PORTLAND | – | yes | yes |
| 503-970 | AT&T | PORTLAND | – | – | yes |
| 503-972 | Allstream | PORTLAND | – | – | yes |
| 503-973 | Lumen | PORTLAND | – | – | yes |
| 503-974 | Comcast | CLACKAMAS | – | yes | yes |
| 503-975 | T-Mobile | PORTLAND | – | yes | yes |
| 503-977 | Lumen | PORTLAND | – | – | yes |
| 503-978 | Lumen | PORTLAND | – | – | yes |
| 503-979 | ASTOUND BROADBAND, LLC - OR | STAYTON | 2009-06-19 | yes | yes |
| 503-980 | Lumen | WOODBURN | – | yes | yes |
| 503-981 | Lumen | WOODBURN | – | – | yes |
| 503-982 | Lumen | WOODBURN | – | – | yes |
| 503-983 | Verizon | SALEM | 2009-03-11 | yes | yes |
| 503-984 | T-Mobile | WOODBURN | – | yes | yes |
| 503-985 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-986 | Lumen | SALEM | – | – | yes |
| 503-987 | Comcast | SCAPPOOSE | 2005-12-08 | yes | yes |
| 503-988 | Lumen | PORTLAND | – | – | yes |
| 503-989 | AT&T | WOODBURN | – | yes | yes |
| 503-990 | T-Mobile | SALEM | – | yes | yes |
| 503-991 | T-Mobile | SALEM | – | yes | yes |
| 503-992 | Ziply Fiber | BEAVERTON | – | yes | yes |
| 503-993 | Spok | PORTLAND | – | – | yes |
| 503-994 | Onvoy | WARRENTON | 2006-09-25 | yes | yes |
| 503-995 | AT&T | PORTLAND | 2007-02-08 | yes | yes |
| 503-996 | ASTOUND BROADBAND, LLC - OR | MOUNTANGEL | 2009-06-19 | yes | yes |
| 503-997 | T-Mobile | PORTLAND | – | – | yes |
| 503-998 | T-Mobile | PORTLAND | – | – | yes |
| 503-999 | T-Mobile | SALEM | – | – | yes |
Frequently asked
How many prefixes does area code 503 have?
784 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 7,840 thousand-number ranges across 63 rate centers.
What do the first three digits after 503 tell me?
They identify the block, which tells you the rate center it was allocated to and the carrier that received it. They do not tell you who serves the number today: portability moves numbers between carriers, and pooling splits a block between several of them.
Is a 503 prefix tied to a specific town?
To a rate center, which is billing geography rather than a town. NANPA abbreviates rate center names to ten characters and in large metros uses zone codes, so the name is a NANPA label, not a place name.
What does “pooled” mean in the 503 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 367 of 503's blocks are pooled, which is how regulators slowed down area code exhaustion – and why one prefix can belong to several carriers.
Source and limits
NANPA CO Code Assignment Records, all states, utilized codes, file updated 11/01/2026 – the rows where the record's Use field is “AS” (assigned). Unavailable codes are excluded. The records say who received a block and when, not who serves a particular number today.
More about this code: overview · carriers · spam complaints · local time