SAN DIEGO prefixes in area code 361
NANPA records 4 assigned NXX blocks to rate center SAN DIEGO in area code 361, 0.7% of the 538 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. 4 holders hold those blocks, the largest being AT&T ENTERPRISES, LLC (1), SOUTHWESTERN BELL (1), ONVOY, LLC - TX (1). The earliest assignment on record here is 2018-08-30 and the most recent 2021-01-14. 4 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 |
|---|---|---|---|---|
| 361-209 | AT&T AT&T ENTERPRISES, LLC | – | yes | yes |
| 361-279 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 361-366 | Onvoy ONVOY, LLC - TX | 2018-08-30 | yes | yes |
| 361-899 | FRACTEL, LLC | 2021-01-14 | 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 |
|---|---|---|---|
| AT&T ENTERPRISES, LLC | AT&T | 1 | 25% |
| SOUTHWESTERN BELL | AT&T | 1 | 25% |
| ONVOY, LLC - TX | Onvoy | 1 | 25% |
| FRACTEL, LLC | – | 1 | 25% |
Frequently asked
Which prefixes belong to SAN DIEGO in area code 361?
4 blocks: 209, 279, 366, 899. The table above gives the holder of each.
Which carriers have numbers in SAN DIEGO?
AT&T ENTERPRISES, LLC (1 block), SOUTHWESTERN BELL (1 block), ONVOY, LLC - TX (1 block), FRACTEL, 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 SAN DIEGO 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.