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

HEMT HMLD prefixes in area code 951

NANPA records 12 assigned NXX blocks to rate center HEMT HMLD in area code 951, 1.7% of the 696 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 NEW CINGULAR WIRELESS PCS, LLC (5), FRONTIER CALIFORNIA INC. (2), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1). The earliest assignment on record here is 2007-02-15 and the most recent 2025-02-20. 11 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

12 assigned blocks – 1.7% of 951
7 holders of record
11 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
951-223 Frontier FRONTIER CALIFORNIA INC. 2007-02-15 yes yes
951-325 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
951-388 AT&T NEW CINGULAR WIRELESS PCS, LLC 2014-04-04 yes yes
951-467 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-09-21 yes yes
951-513 AT&T NEW CINGULAR WIRELESS PCS, LLC 2019-11-15 yes yes
951-599 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
951-724 FRACTEL, LLC 2020-09-21 yes yes
951-725 Onvoy ONVOY, LLC - CA 2024-01-31 yes yes
951-759 AT&T NEW CINGULAR WIRELESS PCS, LLC 2025-02-20 yes yes
951-923 Charter TWC IP ENABLED SERVICES, LLC 2013-03-12 yes yes
951-926 Frontier FRONTIER CALIFORNIA INC. – no yes
951-998 TON80 COMMUNICATIONS, LLC 2022-02-24 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
NEW CINGULAR WIRELESS PCS, LLC AT&T 5 41.7%
FRONTIER CALIFORNIA INC. Frontier 2 16.7%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 8.3%
FRACTEL, LLC – 1 8.3%
ONVOY, LLC - CA Onvoy 1 8.3%
TWC IP ENABLED SERVICES, LLC Charter 1 8.3%
TON80 COMMUNICATIONS, LLC – 1 8.3%

Frequently asked

Which prefixes belong to HEMT HMLD in area code 951?

12 blocks: 223, 325, 388, 467, 513, 599, 724, 725, 759, 923, 926, 998. The table above gives the holder of each.

Which carriers have numbers in HEMT HMLD?

NEW CINGULAR WIRELESS PCS, LLC (5 blocks), FRONTIER CALIFORNIA INC. (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), FRACTEL, LLC (1 block), ONVOY, LLC - CA (1 block), TWC IP ENABLED SERVICES, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HEMT HMLD 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 951

All 696 prefixes in 951