PORTERVL prefixes in area code 559
NANPA records 29 assigned NXX blocks to rate center PORTERVL in area code 559, 3.7% of the 785 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. 12 holders hold those blocks, the largest being PACIFIC BELL (8), NEW CINGULAR WIRELESS PCS, LLC (6), T-MOBILE USA, INC. (4). The earliest assignment on record here is 2001-12-26 and the most recent 2026-05-11. 24 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 559-202 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 559-204 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 559-306 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 559-310 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-12-26 | yes | yes |
| 559-333 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 559-339 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 559-350 | T-Mobile T-MOBILE USA, INC. | 2002-02-21 | yes | yes |
| 559-359 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 559-361 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 559-544 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2010-03-12 | yes | yes |
| 559-560 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 559-576 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2021-10-28 | yes | yes |
| 559-615 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-06-08 | yes | yes |
| 559-719 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 559-756 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 559-781 | AT&T PACIFIC BELL | – | no | yes |
| 559-782 | AT&T PACIFIC BELL | – | no | yes |
| 559-783 | AT&T PACIFIC BELL | – | yes | yes |
| 559-784 | AT&T PACIFIC BELL | – | no | yes |
| 559-788 | AT&T PACIFIC BELL | – | yes | yes |
| 559-789 | AT&T PACIFIC BELL | – | yes | yes |
| 559-791 | AT&T PACIFIC BELL | – | yes | yes |
| 559-792 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 559-793 | AT&T PACIFIC BELL | – | yes | yes |
| 559-853 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2005-06-03 | yes | yes |
| 559-854 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | – | yes | yes |
| 559-883 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-02-27 | yes | yes |
| 559-920 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 559-982 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2026-05-11 | 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 |
|---|---|---|---|
| PACIFIC BELL | AT&T | 8 | 27.6% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 6 | 20.7% |
| T-MOBILE USA, INC. | T-Mobile | 4 | 13.8% |
| ONVOY, LLC - CA | Onvoy | 2 | 6.9% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 2 | 6.9% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 3.4% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 3.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 3.4% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 3.4% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 3.4% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 3.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 1 | 3.4% |
Frequently asked
Which prefixes belong to PORTERVL in area code 559?
29 blocks: 202, 204, 306, 310, 333, 339, 350, 359, 361, 544, 560, 576 and 17 more, all listed in the table above.
Which carriers have numbers in PORTERVL?
PACIFIC BELL (8 blocks), NEW CINGULAR WIRELESS PCS, LLC (6 blocks), T-MOBILE USA, INC. (4 blocks), ONVOY, LLC - CA (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (2 blocks), AMERICAN MESSAGING SERVICES, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is PORTERVL 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.