BALTIMORE prefixes in area code 667
NANPA records 77 assigned NXX blocks to rate center BALTIMORE in area code 667, 17.0% of the 454 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. 31 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (16), ONVOY, LLC - MD (11), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (8). The earliest assignment on record here is 2012-02-08 and the most recent 2026-10-20. 77 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 codes 220, 301, 410, 443 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 667-203 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-205 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-207 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-208 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-209 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-210 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-212 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-213 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-214 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-216 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-217 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-218 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-219 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-223 | Vonage VONAGE AMERICA LLC | 2017-08-04 | yes | yes |
| 667-224 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-233 | Verizon VERIZON MARYLAND, INC. | 2015-02-13 | yes | yes |
| 667-234 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-239 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2012-02-08 | yes | yes |
| 667-250 | Charter ONVOY SPECTRUM, LLC | 2018-06-19 | yes | yes |
| 667-258 | AIRESPRING, INC. | 2018-11-14 | yes | yes |
| 667-260 | Onvoy ONVOY, LLC - MD | – | yes | yes |
| 667-262 | Charter ONVOY SPECTRUM, LLC | – | yes | yes |
| 667-284 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | 2020-07-30 | yes | yes |
| 667-290 | IP HORIZON LLC | 2020-09-09 | yes | yes |
| 667-303 | NUSO, LLC | 2013-03-11 | yes | yes |
| 667-306 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | 2021-03-19 | yes | yes |
| 667-309 | Onvoy ONVOY, LLC - MD | – | yes | yes |
| 667-312 | ATLANTECH ONLINE, INC. - MD | 2015-05-11 | yes | yes |
| 667-335 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2021-08-26 | yes | yes |
| 667-351 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2021-09-27 | yes | yes |
| 667-354 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2021-10-07 | yes | yes |
| 667-379 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2021-12-07 | yes | yes |
| 667-391 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2022-01-27 | yes | yes |
| 667-400 | BARR TELL USA, INC. | 2016-11-10 | yes | yes |
| 667-401 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | 2012-11-20 | yes | yes |
| 667-402 | Telnyx TELNYX LLC | 2016-12-02 | yes | yes |
| 667-406 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2022-05-18 | yes | yes |
| 667-407 | Onvoy ONVOY, LLC - MD | 2022-05-19 | yes | yes |
| 667-414 | Bandwidth BANDWIDTH.COM CLEC, LLC - MD | 2022-09-28 | yes | yes |
| 667-422 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2022-12-16 | yes | yes |
| 667-425 | NUSO, LLC | 2023-02-10 | yes | yes |
| 667-434 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2023-05-05 | yes | yes |
| 667-435 | Onvoy ONVOY, LLC - MD | 2023-05-17 | yes | yes |
| 667-437 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2023-06-28 | yes | yes |
| 667-440 | Onvoy ONVOY, LLC - MD | 2023-07-25 | yes | yes |
| 667-444 | Onvoy ONVOY, LLC - MD | 2015-08-17 | yes | yes |
| 667-461 | FIVE9, INC. | 2023-12-01 | yes | yes |
| 667-464 | TON80 COMMUNICATIONS, LLC | 2022-01-28 | yes | yes |
| 667-487 | CALLWORKS CORPORATION | 2024-05-20 | yes | yes |
| 667-495 | LEAP TELECOM, LLC | 2024-11-01 | yes | yes |
| 667-503 | Charter ONVOY SPECTRUM, LLC | 2025-01-29 | yes | yes |
| 667-504 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-02-10 | yes | yes |
| 667-506 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-03-07 | yes | yes |
| 667-513 | LEAP TELECOM, LLC | 2025-05-20 | yes | yes |
| 667-514 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-05-20 | yes | no |
| 667-515 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-06-06 | yes | yes |
| 667-516 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-06-17 | yes | yes |
| 667-518 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-06-17 | yes | yes |
| 667-519 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-06-17 | yes | yes |
| 667-525 | Onvoy ONVOY, LLC - MD | 2025-08-13 | yes | yes |
| 667-539 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2026-02-20 | yes | yes |
| 667-547 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2026-05-07 | yes | yes |
| 667-558 | Onvoy ONVOY, LLC - MD | 2026-10-20 | yes | no |
| 667-560 | T-Mobile METROPCS, INC. | 2026-08-05 | yes | yes |
| 667-570 | T-Mobile METROPCS, INC. | 2026-08-25 | yes | no |
| 667-600 | EVOLVE CELLULAR, INC. | 2015-09-22 | yes | yes |
| 667-677 | Onvoy ONVOY, LLC - MD | 2015-05-08 | yes | yes |
| 667-770 | AIRUS, INC. - MD | 2015-07-23 | yes | yes |
| 667-771 | WIDE VOICE, LLC - MD | 2015-12-04 | yes | yes |
| 667-776 | HD CARRIER LLC | 2019-09-24 | yes | yes |
| 667-867 | COMMIO, LLC | 2017-06-20 | yes | yes |
| 667-888 | Onvoy ONVOY, LLC - MD | – | yes | yes |
| 667-895 | Twilio TWILIO INTERNATIONAL, INC. | 2020-10-15 | yes | yes |
| 667-899 | FRACTEL, LLC | 2021-10-25 | yes | yes |
| 667-900 | TERRA NOVA TELECOM INC. | 2019-02-20 | yes | yes |
| 667-910 | Onvoy ONVOY, LLC - MD | 2021-03-03 | yes | yes |
| 667-930 | Peerless PEERLESS NETWORK OF MARYLAND, LLC | 2015-03-17 | 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 |
|---|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | Verizon | 16 | 20.8% |
| ONVOY, LLC - MD | Onvoy | 11 | 14.3% |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | T-Mobile | 8 | 10.4% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 8 | 10.4% |
| ONVOY SPECTRUM, LLC | Charter | 3 | 3.9% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 3 | 3.9% |
| NUSO, LLC | – | 2 | 2.6% |
| LEAP TELECOM, LLC | – | 2 | 2.6% |
| METROPCS, INC. | T-Mobile | 2 | 2.6% |
| VONAGE AMERICA LLC | Vonage | 1 | 1.3% |
| VERIZON MARYLAND, INC. | Verizon | 1 | 1.3% |
| AIRESPRING, INC. | – | 1 | 1.3% |
| IP HORIZON LLC | – | 1 | 1.3% |
| ATLANTECH ONLINE, INC. - MD | – | 1 | 1.3% |
| BARR TELL USA, INC. | – | 1 | 1.3% |
| TELNYX LLC | Telnyx | 1 | 1.3% |
| BANDWIDTH.COM CLEC, LLC - MD | Bandwidth | 1 | 1.3% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 1.3% |
| FIVE9, INC. | – | 1 | 1.3% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 1.3% |
| CALLWORKS CORPORATION | – | 1 | 1.3% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 1.3% |
| EVOLVE CELLULAR, INC. | – | 1 | 1.3% |
| AIRUS, INC. - MD | – | 1 | 1.3% |
| WIDE VOICE, LLC - MD | – | 1 | 1.3% |
| HD CARRIER LLC | – | 1 | 1.3% |
| COMMIO, LLC | – | 1 | 1.3% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 1.3% |
| FRACTEL, LLC | – | 1 | 1.3% |
| TERRA NOVA TELECOM INC. | – | 1 | 1.3% |
| PEERLESS NETWORK OF MARYLAND, LLC | Peerless | 1 | 1.3% |
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 BALTIMORE in area code 667?
77 blocks: 203, 205, 207, 208, 209, 210, 212, 213, 214, 216, 217, 218 and 65 more, all listed in the table above.
Which carriers have numbers in BALTIMORE?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (16 blocks), ONVOY, LLC - MD (11 blocks), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (8 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (8 blocks), ONVOY SPECTRUM, LLC (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - MD (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is BALTIMORE 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.