APTOS prefixes in area code 831
NANPA records 19 assigned NXX blocks to rate center APTOS in area code 831, 4.7% of the 406 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. 11 holders hold those blocks, the largest being PACIFIC BELL (7), ONVOY, LLC - CA (3), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1). The earliest assignment on record here is 2016-03-17 and the most recent 2023-08-11. 14 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 |
|---|---|---|---|---|
| 831-219 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 831-251 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 831-257 | Onvoy ONVOY, LLC - CA | 2016-10-07 | yes | yes |
| 831-280 | COMMIO, LLC | 2023-08-11 | yes | yes |
| 831-318 | Onvoy ONVOY, LLC - CA | 2016-03-17 | yes | yes |
| 831-531 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 831-572 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 831-603 | Onvoy ONVOY, LLC - CA | – | no | yes |
| 831-607 | IP HORIZON LLC | – | yes | yes |
| 831-612 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 831-661 | AT&T PACIFIC BELL | – | yes | yes |
| 831-662 | AT&T PACIFIC BELL | – | no | yes |
| 831-684 | AT&T PACIFIC BELL | – | yes | yes |
| 831-685 | AT&T PACIFIC BELL | – | no | yes |
| 831-687 | AT&T PACIFIC BELL | – | yes | yes |
| 831-688 | AT&T PACIFIC BELL | – | no | yes |
| 831-689 | AT&T PACIFIC BELL | – | yes | yes |
| 831-708 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 831-842 | FRACTEL, LLC | 2021-11-21 | 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 | 7 | 36.8% |
| ONVOY, LLC - CA | Onvoy | 3 | 15.8% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 5.3% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 1 | 5.3% |
| COMMIO, LLC | – | 1 | 5.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 5.3% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 5.3% |
| IP HORIZON LLC | – | 1 | 5.3% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 5.3% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 5.3% |
| FRACTEL, LLC | – | 1 | 5.3% |
Frequently asked
Which prefixes belong to APTOS in area code 831?
19 blocks: 219, 251, 257, 280, 318, 531, 572, 603, 607, 612, 661, 662 and 7 more, all listed in the table above.
Which carriers have numbers in APTOS?
PACIFIC BELL (7 blocks), ONVOY, LLC - CA (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), NEW CINGULAR WIRELESS PCS, LLC (1 block), COMMIO, LLC (1 block), MCIMETRO ACCESS TRANSMISSION 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 APTOS 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.