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

HEMT SAGE prefixes in area code 951

NANPA records 5 assigned NXX blocks to rate center HEMT SAGE in area code 951, 0.7% 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. 3 holders hold those blocks, the largest being ONVOY, LLC - CA (2), BANDWIDTH.COM CLEC, LLC - CA (2), FRONTIER CALIFORNIA INC. (1). The earliest assignment on record here is 2012-11-15 and the most recent 2021-04-23. 5 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

5 assigned blocks – 0.7% of 951
3 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
951-364 Onvoy ONVOY, LLC - CA 2012-11-15 yes yes
951-439 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2016-08-22 yes yes
951-708 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
951-767 Frontier FRONTIER CALIFORNIA INC. – yes yes
951-910 Onvoy ONVOY, LLC - CA 2021-04-23 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
ONVOY, LLC - CA Onvoy 2 40%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 2 40%
FRONTIER CALIFORNIA INC. Frontier 1 20%

Frequently asked

Which prefixes belong to HEMT SAGE in area code 951?

5 blocks: 364, 439, 708, 767, 910. The table above gives the holder of each.

Which carriers have numbers in HEMT SAGE?

ONVOY, LLC - CA (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (2 blocks), FRONTIER CALIFORNIA INC. (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 SAGE 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