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

LOSFRESNOS prefixes in area code 956

NANPA records 11 assigned NXX blocks to rate center LOSFRESNOS in area code 956, 1.5% of the 735 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (5), SOUTHWESTERN BELL (2), ONVOY, LLC - TX (2). The earliest assignment on record here is 2002-12-03 and the most recent 2026-05-21. 10 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

11 assigned blocks – 1.5% of 956
5 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
956-233 AT&T SOUTHWESTERN BELL – yes yes
956-238 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2003-01-30 yes yes
956-254 AT&T SOUTHWESTERN BELL 2007-11-29 yes yes
956-303 Onvoy ONVOY, LLC - TX – no yes
956-374 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2017-04-17 yes yes
956-410 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2013-04-16 yes yes
956-434 STPCS JOINT VENTURE, LLC 2002-12-03 yes yes
956-512 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2026-05-21 yes yes
956-556 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2020-08-19 yes yes
956-674 Dish BOOST SUBSCRIBERCO L.L.C. 2022-02-07 yes yes
956-953 Onvoy ONVOY, LLC - TX 2024-02-02 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX Verizon 5 45.5%
SOUTHWESTERN BELL AT&T 2 18.2%
ONVOY, LLC - TX Onvoy 2 18.2%
STPCS JOINT VENTURE, LLC – 1 9.1%
BOOST SUBSCRIBERCO L.L.C. Dish 1 9.1%

Frequently asked

Which prefixes belong to LOSFRESNOS in area code 956?

11 blocks: 233, 238, 254, 303, 374, 410, 434, 512, 556, 674, 953. The table above gives the holder of each.

Which carriers have numbers in LOSFRESNOS?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (5 blocks), SOUTHWESTERN BELL (2 blocks), ONVOY, LLC - TX (2 blocks), STPCS JOINT VENTURE, LLC (1 block), BOOST SUBSCRIBERCO L.L.C. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LOSFRESNOS 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 956

All 735 prefixes in 956