NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

SANMARGART prefixes in area code 805

NANPA records 4 assigned NXX blocks to rate center SANMARGART in area code 805, 0.5% of the 786 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 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (1), ONVOY, LLC - CA (1), PACIFIC BELL (1). The earliest assignment on record here is 2009-08-18 and the most recent 2021-06-23. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.5% of 805
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
805-321 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2009-08-18 yes yes
805-365 Onvoy ONVOY, LLC - CA – yes yes
805-438 AT&T PACIFIC BELL – yes yes
805-887 Telnyx TELNYX LLC 2021-06-23 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

HolderBrandBlocksShare here
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 25%
ONVOY, LLC - CA Onvoy 1 25%
PACIFIC BELL AT&T 1 25%
TELNYX LLC Telnyx 1 25%

Frequently asked

Which prefixes belong to SANMARGART in area code 805?

4 blocks: 321, 365, 438, 887. The table above gives the holder of each.

Which carriers have numbers in SANMARGART?

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (1 block), ONVOY, LLC - CA (1 block), PACIFIC BELL (1 block), TELNYX 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 SANMARGART 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.

Other rate centers in 805

All 786 prefixes in 805