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

OCSD CRLS prefixes in area code 760

NANPA records 33 assigned NXX blocks to rate center OCSD CRLS in area code 760, 4.2% 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. 13 holders hold those blocks, the largest being PACIFIC BELL (13), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (4), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (3). The earliest assignment on record here is 2001-02-22 and the most recent 2010-02-15. 19 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.

33 assigned blocks – 4.2% of 760
13 holders of record
19 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
760-268 AT&T PACIFIC BELL 2001-02-22 yes yes
760-271 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2001-10-19 no yes
760-331 AT&T AT&T - LOCAL – yes yes
760-431 AT&T PACIFIC BELL – no yes
760-438 AT&T PACIFIC BELL – no yes
760-444 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
760-448 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-473 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2002-05-17 no yes
760-476 AT&T PACIFIC BELL – no yes
760-494 Windstream PAETEC ITEL, LLC – no yes
760-496 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-517 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-579 AT&T PACIFIC BELL – yes yes
760-585 Onvoy ONVOY, LLC - CA – yes yes
760-602 AT&T PACIFIC BELL – no yes
760-603 AT&T PACIFIC BELL – no yes
760-607 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-683 Onvoy ONVOY, LLC - CA – yes yes
760-688 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
760-692 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 2001-04-23 yes yes
760-707 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
760-710 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-795 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
760-804 AT&T PACIFIC BELL – no yes
760-814 AT&T AT&T ENTERPRISES, LLC – yes yes
760-827 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-845 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
760-889 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
760-893 AT&T PACIFIC BELL 2010-02-15 yes yes
760-918 AT&T PACIFIC BELL – no yes
760-929 AT&T PACIFIC BELL – no yes
760-930 AT&T PACIFIC BELL – no yes
760-931 AT&T PACIFIC BELL – 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

HolderBrandBlocksShare here
PACIFIC BELL AT&T 13 39.4%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 4 12.1%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 3 9.1%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 6.1%
ONVOY, LLC - CA Onvoy 2 6.1%
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 6.1%
AT&T - LOCAL AT&T 1 3%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 1 3%
PAETEC ITEL, LLC Windstream 1 3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 3%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 3%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 3%
AT&T ENTERPRISES, LLC AT&T 1 3%

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 CRLS in area code 760?

33 blocks: 268, 271, 331, 431, 438, 444, 448, 473, 476, 494, 496, 517 and 21 more, all listed in the table above.

Which carriers have numbers in OCSD CRLS?

PACIFIC BELL (13 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (4 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2 blocks), ONVOY, LLC - CA (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is OCSD CRLS 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