Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
ALAMITOS prefixes in area code 562
NANPA records 101 assigned NXX blocks to rate center ALAMITOS in area code 562, 14.4% of the 702 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. 22 holders hold those blocks, the largest being T-MOBILE USA, INC. (32), FRONTIER CALIFORNIA INC. (27), NEW CINGULAR WIRELESS PCS, LLC (6). The earliest assignment on record here is 2001-01-03 and the most recent 2026-01-22. 78 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
101 assigned blocks – 14.4% of 562
22 holders of record
78 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 562-208 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-209 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-212 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-225 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-230 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-234 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-235 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-240 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 562-241 | T-Mobile T-MOBILE USA, INC. | 2015-01-16 | yes | yes |
| 562-248 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-252 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-280 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-284 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-286 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-296 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 562-312 | Onvoy ONVOY, LLC - CA | 2023-06-26 | yes | yes |
| 562-314 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-330 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 562-331 | T-Mobile T-MOBILE USA, INC. | 2002-08-30 | yes | yes |
| 562-338 | T-Mobile T-MOBILE USA, INC. | 2001-04-25 | yes | yes |
| 562-339 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 562-340 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 562-341 | T-Mobile T-MOBILE USA, INC. | 2014-09-30 | yes | yes |
| 562-342 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-343 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 562-344 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-346 | AT&T PACIFIC BELL (COMPETITIVE) | – | yes | yes |
| 562-357 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-03-04 | yes | yes |
| 562-370 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 562-374 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-375 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-386 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-09-04 | yes | yes |
| 562-387 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-389 | SHELCOMM | 2018-07-31 | no | yes |
| 562-391 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-430 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-431 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-433 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-434 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-438 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-439 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-446 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-449 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-476 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2019-12-24 | yes | yes |
| 562-488 | FRACTEL, LLC | 2020-05-27 | yes | yes |
| 562-493 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-494 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-498 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-509 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2019-07-16 | yes | yes |
| 562-510 | T-Mobile T-MOBILE USA, INC. | 2024-11-08 | yes | yes |
| 562-523 | T-Mobile T-MOBILE USA, INC. | 2020-12-04 | yes | yes |
| 562-538 | T-Mobile T-MOBILE USA, INC. | 2021-07-16 | yes | yes |
| 562-546 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 562-575 | COMMIO, LLC | 2021-09-24 | yes | yes |
| 562-578 | T-Mobile T-MOBILE USA, INC. | 2021-10-13 | yes | yes |
| 562-583 | T-Mobile T-MOBILE USA, INC. | 2015-06-11 | yes | yes |
| 562-588 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-12-19 | yes | yes |
| 562-592 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-594 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-596 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-597 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-598 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-609 | T-Mobile T-MOBILE USA, INC. | 2021-11-15 | yes | yes |
| 562-614 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-12-08 | yes | yes |
| 562-615 | T-Mobile T-MOBILE USA, INC. | 2024-04-15 | yes | yes |
| 562-621 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-626 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-643 | T-Mobile T-MOBILE USA, INC. | 2024-07-16 | yes | yes |
| 562-666 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 562-668 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 562-701 | T-Mobile T-MOBILE USA, INC. | 2025-12-03 | yes | yes |
| 562-702 | T-Mobile METROPCS NETWORKS, LLC | 2018-03-20 | yes | yes |
| 562-719 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-725 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2018-03-22 | yes | yes |
| 562-735 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-742 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-744 | Spok SPOK, INC. | – | no | yes |
| 562-767 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2025-10-08 | yes | yes |
| 562-768 | T-Mobile T-MOBILE USA, INC. | 2024-09-19 | yes | yes |
| 562-784 | TON80 COMMUNICATIONS, LLC | 2022-01-10 | yes | yes |
| 562-794 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 562-795 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-796 | T-Mobile T-MOBILE USA, INC. | 2025-06-18 | yes | yes |
| 562-797 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-799 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-819 | T-Mobile T-MOBILE USA, INC. | 2025-05-16 | yes | yes |
| 562-820 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2025-08-05 | yes | yes |
| 562-825 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2017-12-15 | yes | yes |
| 562-826 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 2001-01-03 | yes | yes |
| 562-844 | FRACTEL, LLC | 2020-07-10 | yes | yes |
| 562-847 | T-Mobile T-MOBILE USA, INC. | 2025-09-24 | yes | yes |
| 562-856 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-870 | T-Mobile T-MOBILE USA, INC. | 2026-01-22 | yes | yes |
| 562-918 | Spok SPOK, INC. | – | no | yes |
| 562-930 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-936 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-939 | T-Mobile T-MOBILE USA, INC. | 2021-03-31 | yes | yes |
| 562-961 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-985 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-986 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-987 | Frontier FRONTIER CALIFORNIA 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 |
|---|---|---|---|
| T-MOBILE USA, INC. | T-Mobile | 32 | 31.7% |
| FRONTIER CALIFORNIA INC. | Frontier | 27 | 26.7% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 6 | 5.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 4 | 4% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 4 | 4% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 4 | 4% |
| ONVOY, LLC - CA | Onvoy | 3 | 3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 2 | 2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 2 | 2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 2% |
| FRACTEL, LLC | – | 2 | 2% |
| SPOK, INC. | Spok | 2 | 2% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 2 | 2% |
| PAETEC ITEL, LLC | Windstream | 1 | 1% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 1% |
| PACIFIC BELL (COMPETITIVE) | AT&T | 1 | 1% |
| SHELCOMM | – | 1 | 1% |
| COMMIO, LLC | – | 1 | 1% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 1% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 1% |
| METROPCS NETWORKS, LLC | T-Mobile | 1 | 1% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 1% |
Frequently asked
Which prefixes belong to ALAMITOS in area code 562?
101 blocks: 208, 209, 212, 225, 230, 234, 235, 240, 241, 248, 252, 280 and 89 more, all listed in the table above.
Which carriers have numbers in ALAMITOS?
T-MOBILE USA, INC. (32 blocks), FRONTIER CALIFORNIA INC. (27 blocks), NEW CINGULAR WIRELESS PCS, LLC (6 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (4 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (4 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ALAMITOS 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.