Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
BALTIMORE prefixes in area code 410
NANPA records 189 assigned NXX blocks to rate center BALTIMORE in area code 410, 24.1% of the 783 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. 16 holders hold those blocks, the largest being VERIZON MARYLAND, INC. (114), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (26), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (16). The earliest assignment on record here is 2003-10-13 and the most recent 2023-07-19. 72 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, 443, 667 – overlay codes cover the same geography, so a rate center is served by all of them.
189 assigned blocks – 24.1% of 410
16 holders of record
72 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 410-207 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-209 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-215 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-217 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-218 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-223 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-225 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-230 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-232 | Spok SPOK, INC. | – | no | yes |
| 410-233 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-234 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-235 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-237 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-240 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2011-10-06 | yes | yes |
| 410-241 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-243 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-244 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-246 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | yes | yes |
| 410-254 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-258 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-261 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-262 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-274 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-276 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-291 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-299 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-301 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2011-10-06 | yes | yes |
| 410-303 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-318 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-319 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-323 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-325 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-327 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-328 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-332 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-333 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-336 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 410-338 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-340 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 410-342 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-347 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-350 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-351 | Spok SPOK, INC. | – | no | yes |
| 410-354 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-355 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-358 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-359 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-361 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-362 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-365 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-366 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-367 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-368 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-369 | Lumen LEVEL 3 TELECOM OF MARYLAND, LLC - MD | – | yes | yes |
| 410-371 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-375 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-382 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-383 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-385 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-387 | Windstream PAETEC ITEL, LLC | 2011-08-12 | yes | yes |
| 410-389 | Spok SPOK, INC. | – | no | yes |
| 410-393 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-396 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-400 | Windstream PAETEC ITEL, LLC | 2006-06-15 | yes | yes |
| 410-404 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-409 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-410 | Charter ONVOY SPECTRUM, LLC | 2023-05-17 | yes | yes |
| 410-419 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-426 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-433 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-435 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-444 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-445 | Spok SPOK, INC. | – | no | yes |
| 410-448 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-450 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-454 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | no | yes |
| 410-456 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-458 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-462 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-464 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-466 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-467 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-468 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-469 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-470 | Verizon VERIZON MARYLAND, INC. | 2005-06-28 | yes | yes |
| 410-478 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2023-07-19 | yes | yes |
| 410-483 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-485 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-488 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-493 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-499 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-500 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-502 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-516 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-522 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-523 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-525 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-528 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-532 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-534 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-537 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-539 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-542 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-545 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-547 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-550 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-554 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-558 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-563 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-566 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-576 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-578 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-585 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-591 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-598 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-601 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-605 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-613 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-614 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-617 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-622 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 2011-08-12 | yes | yes |
| 410-624 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-625 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-627 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-631 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-633 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-637 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-640 | Spok SPOK, INC. | – | no | yes |
| 410-644 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-646 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-649 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | yes | yes |
| 410-659 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-662 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-664 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-669 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-675 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-685 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-706 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-710 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2005-10-03 | yes | yes |
| 410-727 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-728 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-732 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-735 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 410-736 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-743 | Spok SPOK, INC. | – | no | yes |
| 410-746 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-752 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-759 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 410-764 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-767 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-779 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 410-783 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-800 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2004-10-05 | yes | yes |
| 410-801 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | yes | yes |
| 410-804 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-805 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2011-08-25 | yes | yes |
| 410-814 | Windstream PAETEC ITEL, LLC | 2005-09-30 | yes | yes |
| 410-826 | Onvoy ONVOY, LLC - MD | 2015-11-19 | yes | yes |
| 410-837 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-843 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | no | yes |
| 410-844 | Peerless PEERLESS NETWORK OF MARYLAND, LLC | 2011-09-30 | yes | yes |
| 410-856 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 410-864 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | yes | yes |
| 410-878 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | yes | yes |
| 410-889 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-895 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-900 | Windstream PAETEC ITEL, LLC | 2004-10-04 | yes | yes |
| 410-905 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-906 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-908 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-913 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-915 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 2005-10-27 | no | yes |
| 410-916 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-925 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-929 | Bandwidth BANDWIDTH.COM CLEC, LLC - MD | 2008-05-13 | yes | yes |
| 410-935 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-945 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-947 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-949 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | – | yes | yes |
| 410-951 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | no | yes |
| 410-952 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-955 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-960 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 410-961 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-962 | Verizon VERIZON MARYLAND, INC. | – | no | yes |
| 410-963 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-977 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | – | yes | yes |
| 410-982 | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2003-10-13 | yes | yes |
| 410-986 | Verizon VERIZON MARYLAND, INC. | – | no | 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 |
|---|---|---|---|
| VERIZON MARYLAND, INC. | Verizon | 114 | 60.3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | Verizon | 26 | 13.8% |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | T-Mobile | 16 | 8.5% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Verizon | 7 | 3.7% |
| SPOK, INC. | Spok | 6 | 3.2% |
| PAETEC ITEL, LLC | Windstream | 5 | 2.6% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 4 | 2.1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | AT&T | 3 | 1.6% |
| LEVEL 3 TELECOM OF MARYLAND, LLC - MD | Lumen | 1 | 0.5% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 0.5% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 1 | 0.5% |
| ONVOY, LLC - MD | Onvoy | 1 | 0.5% |
| PEERLESS NETWORK OF MARYLAND, LLC | Peerless | 1 | 0.5% |
| BALTIMORE-WASHINGTON TELEPHONE (BWT) | – | 1 | 0.5% |
| BANDWIDTH.COM CLEC, LLC - MD | Bandwidth | 1 | 0.5% |
| QUANTUM TELECOMMUNICATIONS, INC. - MD | – | 1 | 0.5% |
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 410?
189 blocks: 207, 209, 215, 217, 218, 223, 225, 230, 232, 233, 234, 235 and 177 more, all listed in the table above.
Which carriers have numbers in BALTIMORE?
VERIZON MARYLAND, INC. (114 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (26 blocks), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (16 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD (7 blocks), SPOK, INC. (6 blocks), PAETEC ITEL, LLC (5 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.