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

LOS ALAMOS prefixes in area code 805

NANPA records 3 assigned NXX blocks to rate center LOS ALAMOS in area code 805, 0.4% of the 786 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 FRONTIER CALIFORNIA INC. (1), WIDE VOICE, LLC - CA (1), ONVOY, LLC - CA (1). The earliest assignment on record here is 2010-01-22 and the most recent 2010-01-22. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 505, 820 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 805
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
805-344 Frontier FRONTIER CALIFORNIA INC. – yes yes
805-360 WIDE VOICE, LLC - CA 2010-01-22 yes yes
805-960 Onvoy ONVOY, LLC - CA – 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
FRONTIER CALIFORNIA INC. Frontier 1 33.3%
WIDE VOICE, LLC - CA – 1 33.3%
ONVOY, LLC - CA Onvoy 1 33.3%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to LOS ALAMOS in area code 805?

3 blocks: 344, 360, 960. The table above gives the holder of each.

Which carriers have numbers in LOS ALAMOS?

FRONTIER CALIFORNIA INC. (1 block), WIDE VOICE, LLC - CA (1 block), ONVOY, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LOS ALAMOS 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 805

All 786 prefixes in 805