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

SINTON prefixes in area code 361

NANPA records 7 assigned NXX blocks to rate center SINTON 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. 7 holders hold those blocks, the largest being SOUTHWESTERN BELL (1), IP HORIZON LLC (1), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (1). The earliest assignment on record here is 2001-09-27 and the most recent 2025-02-28. 6 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
7 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
361-364 AT&T SOUTHWESTERN BELL – yes yes
361-397 IP HORIZON LLC 2025-02-28 yes yes
361-424 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2005-04-08 yes yes
361-437 T-Mobile METROPCS, INC. 2001-09-27 yes yes
361-587 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2006-10-02 yes yes
361-607 Onvoy ONVOY, LLC - TX – no yes
361-941 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – 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 1 14.3%
IP HORIZON LLC – 1 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX Verizon 1 14.3%
METROPCS, INC. T-Mobile 1 14.3%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 1 14.3%
ONVOY, LLC - TX Onvoy 1 14.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 14.3%

Frequently asked

Which prefixes belong to SINTON in area code 361?

7 blocks: 364, 397, 424, 437, 587, 607, 941. The table above gives the holder of each.

Which carriers have numbers in SINTON?

SOUTHWESTERN BELL (1 block), IP HORIZON LLC (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (1 block), METROPCS, INC. (1 block), LEVEL 3 COMMUNICATIONS, LLC - TX (1 block), ONVOY, 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 SINTON 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