SAN YSIDRO prefixes in area code 575
NANPA records 3 assigned NXX blocks to rate center SAN YSIDRO in area code 575, 0.6% of the 521 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. 3 holders hold those blocks, the largest being ONVOY, LLC - NM (1), TON80 COMMUNICATIONS, LLC (1), VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW (1). The earliest assignment on record here is 2017-08-17 and the most recent 2022-01-11. 2 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 |
|---|---|---|---|---|
| 575-255 | Onvoy ONVOY, LLC - NM | 2017-08-17 | yes | yes |
| 575-663 | TON80 COMMUNICATIONS, LLC | 2022-01-11 | yes | yes |
| 575-834 | Windstream VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW | – | 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 |
|---|---|---|---|
| ONVOY, LLC - NM | Onvoy | 1 | 33.3% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 33.3% |
| VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW | Windstream | 1 | 33.3% |
Frequently asked
Which prefixes belong to SAN YSIDRO in area code 575?
3 blocks: 255, 663, 834. The table above gives the holder of each.
Which carriers have numbers in SAN YSIDRO?
ONVOY, LLC - NM (1 block), TON80 COMMUNICATIONS, LLC (1 block), VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW (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 YSIDRO 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.