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

ENCINITAS prefixes in area code 760

NANPA records 32 assigned NXX blocks to rate center ENCINITAS in area code 760, 4.1% 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. 11 holders hold those blocks, the largest being PACIFIC BELL (11), T-MOBILE USA, INC. (5), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (3). The earliest assignment on record here is 2002-09-20 and the most recent 2022-10-25. 23 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.

32 assigned blocks – 4.1% of 760
11 holders of record
23 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
760-230 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
760-274 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-334 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-402 T-Mobile T-MOBILE USA, INC. – yes yes
760-436 AT&T PACIFIC BELL – no yes
760-452 Windstream PAETEC ITEL, LLC – yes yes
760-454 Onvoy ONVOY, LLC - CA – yes yes
760-456 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
760-479 AT&T PACIFIC BELL – yes yes
760-487 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
760-492 T-Mobile T-MOBILE USA, INC. – yes yes
760-516 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
760-557 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-613 T-Mobile T-MOBILE USA, INC. – yes yes
760-632 AT&T PACIFIC BELL – no yes
760-633 AT&T PACIFIC BELL – no yes
760-634 AT&T PACIFIC BELL – no yes
760-635 AT&T PACIFIC BELL – no yes
760-642 AT&T PACIFIC BELL – yes yes
760-649 Onvoy ONVOY, LLC - CA 2022-10-25 yes yes
760-652 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
760-697 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
760-704 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-753 AT&T PACIFIC BELL – no yes
760-783 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
760-809 T-Mobile T-MOBILE USA, INC. – yes yes
760-815 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
760-840 T-Mobile T-MOBILE USA, INC. 2002-09-20 yes yes
760-846 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
760-942 AT&T PACIFIC BELL – no yes
760-943 AT&T PACIFIC BELL – yes yes
760-944 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 11 34.4%
T-MOBILE USA, INC. T-Mobile 5 15.6%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 3 9.4%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 3 9.4%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 2 6.2%
ONVOY, LLC - CA Onvoy 2 6.2%
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 6.2%
PAETEC ITEL, LLC Windstream 1 3.1%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 3.1%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 3.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 3.1%

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 ENCINITAS in area code 760?

32 blocks: 230, 274, 334, 402, 436, 452, 454, 456, 479, 487, 492, 516 and 20 more, all listed in the table above.

Which carriers have numbers in ENCINITAS?

PACIFIC BELL (11 blocks), T-MOBILE USA, INC. (5 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (3 blocks), COMCAST PHONE OF CALIFORNIA, LLC (2 blocks), ONVOY, LLC - CA (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ENCINITAS 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