Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
LA JOLLA prefixes in area code 858
NANPA records 167 assigned NXX blocks to rate center LA JOLLA in area code 858, 29.6% of the 564 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 23 holders hold those blocks, the largest being PACIFIC BELL (53), NEW CINGULAR WIRELESS PCS, LLC (22), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (16). The earliest assignment on record here is 2001-02-15 and the most recent 2026-10-20. 105 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 619 – overlay codes cover the same geography, so a rate center is served by all of them.
167 assigned blocks – 29.6% of 858
23 holders of record
105 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 858-200 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-202 | AT&T PACIFIC BELL | – | yes | yes |
| 858-203 | Onvoy ONVOY, LLC - CA | 2016-01-27 | yes | yes |
| 858-210 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2008-07-21 | yes | yes |
| 858-214 | T-Mobile T-MOBILE USA, INC. | 2017-11-22 | yes | yes |
| 858-220 | T-Mobile T-MOBILE USA, INC. | 2002-01-18 | yes | yes |
| 858-222 | Onvoy ONVOY, LLC - CA | 2008-10-13 | yes | yes |
| 858-224 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-228 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-230 | AT&T AT&T ENTERPRISES, LLC | 2011-08-23 | yes | yes |
| 858-232 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-233 | NORTH COUNTY COMMUNICATION CORPORATION - CA | – | no | yes |
| 858-235 | Windstream PAETEC ITEL, LLC | 2019-12-23 | yes | yes |
| 858-241 | T-Mobile T-MOBILE USA, INC. | 2021-01-08 | yes | yes |
| 858-242 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2011-06-20 | yes | yes |
| 858-245 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-09-17 | no | yes |
| 858-246 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 2007-07-03 | yes | yes |
| 858-247 | TERRA NOVA TELECOM INC. | – | yes | yes |
| 858-249 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2012-10-04 | yes | yes |
| 858-250 | WIDE VOICE, LLC - CA | – | yes | yes |
| 858-251 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-06-29 | yes | yes |
| 858-255 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2011-02-02 | yes | yes |
| 858-257 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2014-10-01 | yes | yes |
| 858-260 | T-Mobile T-MOBILE USA, INC. | 2013-07-22 | yes | yes |
| 858-263 | Charter TWC IP ENABLED SERVICES, LLC | 2013-03-12 | yes | yes |
| 858-270 | AT&T PACIFIC BELL | – | no | yes |
| 858-272 | AT&T PACIFIC BELL | – | no | yes |
| 858-273 | AT&T PACIFIC BELL | – | no | yes |
| 858-274 | AT&T PACIFIC BELL | – | no | yes |
| 858-281 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2014-04-22 | yes | yes |
| 858-283 | Onvoy ONVOY, LLC - CA | 2016-10-10 | yes | yes |
| 858-291 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-09-03 | yes | yes |
| 858-295 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-10-03 | yes | yes |
| 858-303 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 858-319 | T-Mobile T-MOBILE USA, INC. | 2021-03-24 | yes | yes |
| 858-320 | AT&T PACIFIC BELL | – | no | yes |
| 858-332 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-333 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 858-334 | AT&T PACIFIC BELL | 2001-02-15 | yes | yes |
| 858-336 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-337 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-340 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-03-10 | yes | yes |
| 858-343 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2022-12-06 | yes | yes |
| 858-344 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-24 | no | yes |
| 858-346 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 858-349 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-352 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-354 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 858-359 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 858-361 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-362 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | no | yes |
| 858-366 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-370 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-05-03 | yes | yes |
| 858-372 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-05-03 | yes | yes |
| 858-373 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-374 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-08-03 | yes | yes |
| 858-390 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-11-16 | yes | yes |
| 858-396 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-01-22 | yes | yes |
| 858-401 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2004-03-08 | yes | yes |
| 858-402 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-02-20 | yes | yes |
| 858-404 | AT&T PACIFIC BELL | – | yes | yes |
| 858-405 | T-Mobile T-MOBILE USA, INC. | 2001-12-14 | no | yes |
| 858-406 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-07-23 | yes | yes |
| 858-409 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-09-17 | yes | yes |
| 858-410 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | no | yes |
| 858-412 | Charter TWC IP ENABLED SERVICES, LLC | 2006-09-22 | yes | yes |
| 858-431 | AT&T AT&T - LOCAL | – | yes | yes |
| 858-450 | AT&T PACIFIC BELL | – | no | yes |
| 858-452 | AT&T PACIFIC BELL | – | no | yes |
| 858-453 | AT&T PACIFIC BELL | – | no | yes |
| 858-454 | AT&T PACIFIC BELL | – | no | yes |
| 858-455 | AT&T PACIFIC BELL | – | no | yes |
| 858-456 | AT&T PACIFIC BELL | – | no | yes |
| 858-457 | AT&T PACIFIC BELL | – | no | yes |
| 858-458 | AT&T PACIFIC BELL | – | no | yes |
| 858-459 | AT&T PACIFIC BELL | – | no | yes |
| 858-473 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2026-10-20 | yes | no |
| 858-483 | AT&T PACIFIC BELL | – | no | yes |
| 858-488 | AT&T PACIFIC BELL | – | no | yes |
| 858-490 | AT&T PACIFIC BELL | – | no | yes |
| 858-500 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-518 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 858-525 | AT&T PACIFIC BELL | – | yes | yes |
| 858-526 | AT&T PACIFIC BELL | – | yes | yes |
| 858-529 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-531 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-06-18 | no | yes |
| 858-534 | AT&T PACIFIC BELL | – | no | yes |
| 858-535 | AT&T PACIFIC BELL | – | no | yes |
| 858-539 | AT&T PACIFIC BELL | – | yes | yes |
| 858-546 | AT&T PACIFIC BELL | – | no | yes |
| 858-550 | AT&T PACIFIC BELL | – | no | yes |
| 858-551 | AT&T PACIFIC BELL | – | no | yes |
| 858-552 | AT&T PACIFIC BELL | – | yes | yes |
| 858-554 | AT&T PACIFIC BELL | – | no | yes |
| 858-558 | AT&T PACIFIC BELL | – | no | yes |
| 858-567 | FRACTEL, LLC | 2021-04-22 | yes | yes |
| 858-568 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-08-09 | yes | yes |
| 858-581 | AT&T PACIFIC BELL | – | no | yes |
| 858-587 | AT&T PACIFIC BELL | – | no | yes |
| 858-597 | AT&T PACIFIC BELL | – | no | yes |
| 858-622 | AT&T PACIFIC BELL | – | no | yes |
| 858-623 | AT&T PACIFIC BELL | – | no | yes |
| 858-625 | AT&T PACIFIC BELL | – | yes | yes |
| 858-626 | AT&T PACIFIC BELL | – | no | yes |
| 858-638 | AT&T PACIFIC BELL | – | no | yes |
| 858-642 | AT&T PACIFIC BELL | – | yes | yes |
| 858-643 | AT&T PACIFIC BELL | – | no | yes |
| 858-646 | AT&T PACIFIC BELL | – | no | yes |
| 858-651 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | no | yes |
| 858-652 | T-Mobile T-MOBILE USA, INC. | 2006-09-21 | yes | yes |
| 858-657 | AT&T PACIFIC BELL | – | no | yes |
| 858-658 | AT&T PACIFIC BELL | – | no | yes |
| 858-665 | TON80 COMMUNICATIONS, LLC | 2022-01-19 | yes | yes |
| 858-666 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-677 | AT&T PACIFIC BELL | – | no | yes |
| 858-678 | AT&T PACIFIC BELL | – | no | yes |
| 858-692 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2002-08-14 | yes | yes |
| 858-699 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-07 | yes | yes |
| 858-713 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-729 | AT&T PACIFIC BELL | – | yes | yes |
| 858-731 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-732 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-736 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-750 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2006-07-18 | yes | yes |
| 858-752 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 858-754 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-765 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2021-08-10 | yes | yes |
| 858-766 | Onvoy ONVOY, LLC - CA | 2012-11-07 | yes | yes |
| 858-768 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 858-775 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 858-777 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 858-784 | AT&T PACIFIC BELL | – | yes | yes |
| 858-788 | FRACTEL, LLC | 2019-03-19 | yes | yes |
| 858-795 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | no | yes |
| 858-799 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-812 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | no | yes |
| 858-822 | AT&T PACIFIC BELL | – | yes | yes |
| 858-824 | AT&T PACIFIC BELL | – | no | yes |
| 858-826 | AT&T PACIFIC BELL | – | no | yes |
| 858-845 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | no | yes |
| 858-864 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 858-866 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-869 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-875 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 858-882 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-886 | AT&T PACIFIC BELL | – | yes | yes |
| 858-888 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 858-900 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 858-909 | AT&T PACIFIC BELL | – | yes | yes |
| 858-922 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 858-926 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 858-945 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 858-952 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2005-12-19 | yes | yes |
| 858-964 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 858-967 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 858-978 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-25 | yes | yes |
| 858-979 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-980 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-981 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-982 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-983 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-984 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-985 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-986 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-989 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-10-30 | yes | yes |
| 858-997 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2007-08-17 | yes | yes |
| 858-999 | Onvoy ONVOY, LLC - CA | – | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 53 | 31.7% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 22 | 13.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 16 | 9.6% |
| ONVOY, LLC - CA | Onvoy | 11 | 6.6% |
| T-MOBILE USA, INC. | T-Mobile | 11 | 6.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 10 | 6% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 8 | 4.8% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 7 | 4.2% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 6 | 3.6% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 4 | 2.4% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 3 | 1.8% |
| PAETEC ITEL, LLC | Windstream | 2 | 1.2% |
| TWC IP ENABLED SERVICES, LLC | Charter | 2 | 1.2% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 2 | 1.2% |
| FRACTEL, LLC | – | 2 | 1.2% |
| AT&T ENTERPRISES, LLC | AT&T | 1 | 0.6% |
| NORTH COUNTY COMMUNICATION CORPORATION - CA | – | 1 | 0.6% |
| TERRA NOVA TELECOM INC. | – | 1 | 0.6% |
| WIDE VOICE, LLC - CA | – | 1 | 0.6% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 0.6% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 0.6% |
| AT&T - LOCAL | AT&T | 1 | 0.6% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 0.6% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to LA JOLLA in area code 858?
167 blocks: 200, 202, 203, 210, 214, 220, 222, 224, 228, 230, 232, 233 and 155 more, all listed in the table above.
Which carriers have numbers in LA JOLLA?
PACIFIC BELL (53 blocks), NEW CINGULAR WIRELESS PCS, LLC (22 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (16 blocks), ONVOY, LLC - CA (11 blocks), T-MOBILE USA, INC. (11 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (10 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is LA JOLLA a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.