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

CALALLEN prefixes in area code 361

NANPA records 7 assigned NXX blocks to rate center CALALLEN in area code 361, 1.3% of the 538 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. 5 holders hold those blocks, the largest being SOUTHWESTERN BELL (2), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (2), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (1). The earliest assignment on record here is 2003-02-24 and the most recent 2022-05-24. 5 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

7 assigned blocks – 1.3% of 361
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
361-241 AT&T SOUTHWESTERN BELL – no yes
361-242 AT&T SOUTHWESTERN BELL – no yes
361-248 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX 2003-02-24 yes yes
361-276 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2022-05-24 yes yes
361-317 Onvoy ONVOY, LLC - TX – yes yes
361-504 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2006-10-02 yes yes
361-520 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – 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
SOUTHWESTERN BELL AT&T 2 28.6%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 2 28.6%
TELEPORT COMMUNICATIONS AMERICA, LLC - TX AT&T 1 14.3%
ONVOY, LLC - TX Onvoy 1 14.3%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 1 14.3%

Frequently asked

Which prefixes belong to CALALLEN in area code 361?

7 blocks: 241, 242, 248, 276, 317, 504, 520. The table above gives the holder of each.

Which carriers have numbers in CALALLEN?

SOUTHWESTERN BELL (2 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (1 block), ONVOY, LLC - TX (1 block), LEVEL 3 COMMUNICATIONS, LLC - TX (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CALALLEN 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 361

All 538 prefixes in 361