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

OCSD PDTN prefixes in area code 760

NANPA records 14 assigned NXX blocks to rate center OCSD PDTN in area code 760, 1.8% 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. 8 holders hold those blocks, the largest being PACIFIC BELL (5), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (2), LEVEL 3 COMMUNICATIONS, LLC - CA (2). The earliest assignment on record here is 2008-11-17 and the most recent 2008-11-17. 11 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 442 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 760
8 holders of record
11 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
760-237 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
760-293 Spok SPOK, INC. – no yes
760-385 AT&T PACIFIC BELL – yes yes
760-430 AT&T PACIFIC BELL – yes yes
760-472 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-512 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
760-543 T-Mobile METROPCS, INC. – yes yes
760-575 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-655 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
760-719 AT&T PACIFIC BELL 2008-11-17 yes yes
760-725 AT&T PACIFIC BELL – no yes
760-763 AT&T PACIFIC BELL – no yes
760-829 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-847 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – 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
PACIFIC BELL AT&T 5 35.7%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 2 14.3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 14.3%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 1 7.1%
SPOK, INC. Spok 1 7.1%
METROPCS, INC. T-Mobile 1 7.1%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 7.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 7.1%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to OCSD PDTN in area code 760?

14 blocks: 237, 293, 385, 430, 472, 512, 543, 575, 655, 719, 725, 763 and 2 more, all listed in the table above.

Which carriers have numbers in OCSD PDTN?

PACIFIC BELL (5 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), COMCAST PHONE OF CALIFORNIA, LLC (1 block), SPOK, INC. (1 block), METROPCS, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is OCSD PDTN 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 760

All 785 prefixes in 760