CMTN GRDN prefixes in area code 424
NANPA records 32 assigned NXX blocks to rate center CMTN GRDN in area code 424, 7.0% of the 460 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. 14 holders hold those blocks, the largest being METROPCS NETWORKS, LLC (6), ONVOY, LLC - CA (6), T-MOBILE USA, INC. (4). The earliest assignment on record here is 2006-11-30 and the most recent 2026-08-11. 32 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 213, 310, 562 – 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 |
|---|---|---|---|---|
| 424-205 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2006-11-30 | yes | yes |
| 424-219 | T-Mobile METROPCS NETWORKS, LLC | 2007-03-13 | yes | yes |
| 424-221 | T-Mobile METROPCS NETWORKS, LLC | 2007-03-19 | yes | yes |
| 424-232 | T-Mobile T-MOBILE USA, INC. | 2007-08-24 | yes | yes |
| 424-233 | T-Mobile METROPCS NETWORKS, LLC | 2007-08-24 | yes | yes |
| 424-244 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2008-09-10 | yes | yes |
| 424-246 | T-Mobile METROPCS NETWORKS, LLC | – | yes | yes |
| 424-260 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2010-07-20 | yes | yes |
| 424-266 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2010-07-20 | yes | yes |
| 424-286 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2011-08-30 | yes | yes |
| 424-292 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2013-02-04 | yes | yes |
| 424-295 | T-Mobile METROPCS NETWORKS, LLC | 2013-02-15 | yes | yes |
| 424-300 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 424-319 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2016-06-29 | yes | yes |
| 424-329 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2013-08-08 | yes | yes |
| 424-340 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | – | yes | yes |
| 424-344 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-09-02 | yes | yes |
| 424-375 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 424-396 | T-Mobile T-MOBILE USA, INC. | 2015-03-09 | yes | yes |
| 424-415 | T-Mobile T-MOBILE USA, INC. | 2020-02-05 | yes | yes |
| 424-424 | FRACTEL, LLC | 2020-05-27 | yes | yes |
| 424-430 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2019-05-14 | yes | yes |
| 424-469 | T-Mobile T-MOBILE USA, INC. | 2021-10-04 | yes | yes |
| 424-486 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-01-26 | yes | yes |
| 424-528 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2017-03-17 | yes | yes |
| 424-531 | T-Mobile METROPCS NETWORKS, LLC | 2015-04-14 | yes | yes |
| 424-539 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-12-03 | yes | yes |
| 424-551 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 424-560 | Onvoy ONVOY, LLC - CA | 2025-09-03 | yes | yes |
| 424-575 | Onvoy ONVOY, LLC - CA | 2026-08-11 | yes | yes |
| 424-728 | TON80 COMMUNICATIONS, LLC | 2022-01-07 | yes | yes |
| 424-997 | Onvoy ONVOY, LLC - CA | 2024-06-13 | 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 |
|---|---|---|---|
| METROPCS NETWORKS, LLC | T-Mobile | 6 | 18.8% |
| ONVOY, LLC - CA | Onvoy | 6 | 18.8% |
| T-MOBILE USA, INC. | T-Mobile | 4 | 12.5% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 4 | 12.5% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 2 | 6.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 2 | 6.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 3.1% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 3.1% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 3.1% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 3.1% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 3.1% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 1 | 3.1% |
| FRACTEL, LLC | – | 1 | 3.1% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 3.1% |
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 CMTN GRDN in area code 424?
32 blocks: 205, 219, 221, 232, 233, 244, 246, 260, 266, 286, 292, 295 and 20 more, all listed in the table above.
Which carriers have numbers in CMTN GRDN?
METROPCS NETWORKS, LLC (6 blocks), ONVOY, LLC - CA (6 blocks), T-MOBILE USA, INC. (4 blocks), BANDWIDTH.COM CLEC, LLC - CA (4 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is CMTN GRDN 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.