Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
NORWALK prefixes in area code 562
NANPA records 100 assigned NXX blocks to rate center NORWALK in area code 562, 14.2% 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. 23 holders hold those blocks, the largest being FRONTIER CALIFORNIA INC. (36), T-MOBILE USA, INC. (9), NEW CINGULAR WIRELESS PCS, LLC (8). The earliest assignment on record here is 2001-02-08 and the most recent 2024-10-21. 69 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 203, 419, 475, 567 – overlay codes cover the same geography, so a rate center is served by all of them.
100 assigned blocks – 14.2% of 562
23 holders of record
69 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 562-202 | Charter TWC IP ENABLED SERVICES, LLC | 2012-12-21 | yes | yes |
| 562-207 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-210 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2016-02-26 | yes | yes |
| 562-215 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 562-219 | Charter CHARTER IP ENABLED SERVICES, LLC | 2005-07-13 | yes | yes |
| 562-226 | Spok SPOK, INC. | – | no | yes |
| 562-227 | Spok SPOK, INC. | – | no | yes |
| 562-228 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 562-229 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-239 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-246 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-262 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-263 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-274 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 562-278 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-281 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 562-282 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-288 | 33 WIRELESS INC. | – | no | yes |
| 562-292 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 562-293 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 562-307 | T-Mobile METROPCS NETWORKS, LLC | 2002-02-11 | yes | yes |
| 562-345 | AT&T PACIFIC BELL (COMPETITIVE) | – | yes | yes |
| 562-348 | T-Mobile T-MOBILE USA, INC. | 2015-03-13 | yes | yes |
| 562-356 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 562-376 | T-Mobile METROPCS NETWORKS, LLC | – | yes | yes |
| 562-379 | Charter TWC IP ENABLED SERVICES, LLC | 2017-08-22 | yes | yes |
| 562-402 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-403 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-404 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-405 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 562-406 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-407 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-409 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-410 | T-Mobile T-MOBILE USA, INC. | 2019-08-27 | yes | yes |
| 562-412 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 562-455 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 562-461 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-462 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-465 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-466 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-467 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-468 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-474 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-02-23 | yes | yes |
| 562-483 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-484 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-503 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 562-521 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-06-23 | yes | yes |
| 562-526 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-10-08 | yes | yes |
| 562-539 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2021-02-16 | yes | yes |
| 562-547 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-16 | no | yes |
| 562-559 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 562-562 | Onvoy ONVOY, LLC - CA | 2022-09-27 | yes | yes |
| 562-564 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-07-22 | yes | yes |
| 562-565 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 562-569 | T-Mobile T-MOBILE USA, INC. | 2002-08-30 | yes | yes |
| 562-574 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-10-10 | yes | yes |
| 562-584 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-03-03 | yes | yes |
| 562-603 | T-Mobile METROPCS NETWORKS, LLC | 2022-11-03 | yes | yes |
| 562-613 | T-Mobile T-MOBILE USA, INC. | 2022-02-28 | yes | yes |
| 562-623 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-638 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-07-16 | yes | yes |
| 562-645 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 562-647 | Onvoy ONVOY, LLC - CA | 2023-04-07 | yes | yes |
| 562-649 | T-Mobile T-MOBILE USA, INC. | 2024-10-21 | yes | yes |
| 562-650 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-02-08 | no | yes |
| 562-651 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-653 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-660 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2024-10-21 | yes | yes |
| 562-667 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-669 | FRACTEL, LLC | 2021-10-25 | yes | yes |
| 562-677 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-707 | T-Mobile T-MOBILE USA, INC. | 2023-09-26 | yes | yes |
| 562-709 | Onvoy ONVOY, LLC - CA | 2023-10-04 | yes | yes |
| 562-710 | Charter ONVOY SPECTRUM, LLC | 2022-08-25 | yes | yes |
| 562-716 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 562-727 | T-Mobile T-MOBILE USA, INC. | 2024-01-10 | yes | yes |
| 562-734 | T-Mobile T-MOBILE USA, INC. | 2024-03-26 | yes | yes |
| 562-741 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 562-752 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-08-20 | yes | yes |
| 562-802 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-804 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-807 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-809 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-860 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-863 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-864 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-865 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-866 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-867 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-868 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-888 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 562-916 | Frontier FRONTIER CALIFORNIA INC. | – | yes | yes |
| 562-920 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-921 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-924 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-925 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-926 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-929 | Frontier FRONTIER CALIFORNIA INC. | – | no | yes |
| 562-977 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 562-991 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2008-05-28 | 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 |
|---|---|---|---|
| FRONTIER CALIFORNIA INC. | Frontier | 36 | 36% |
| T-MOBILE USA, INC. | T-Mobile | 9 | 9% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 8 | 8% |
| ONVOY, LLC - CA | Onvoy | 7 | 7% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 6 | 6% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 5 | 5% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 5 | 5% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 3 | 3% |
| METROPCS NETWORKS, LLC | T-Mobile | 3 | 3% |
| TWC IP ENABLED SERVICES, LLC | Charter | 2 | 2% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 2 | 2% |
| SPOK, INC. | Spok | 2 | 2% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 2 | 2% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 1% |
| 33 WIRELESS INC. | – | 1 | 1% |
| PAETEC ITEL, LLC | Windstream | 1 | 1% |
| PACIFIC BELL (COMPETITIVE) | AT&T | 1 | 1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 1% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 1% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 1% |
| FRACTEL, LLC | – | 1 | 1% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 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 NORWALK in area code 562?
100 blocks: 202, 207, 210, 215, 219, 226, 227, 228, 229, 239, 246, 262 and 88 more, all listed in the table above.
Which carriers have numbers in NORWALK?
FRONTIER CALIFORNIA INC. (36 blocks), T-MOBILE USA, INC. (9 blocks), NEW CINGULAR WIRELESS PCS, LLC (8 blocks), ONVOY, LLC - CA (7 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (6 blocks), BANDWIDTH.COM CLEC, LLC - CA (5 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is NORWALK 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.