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

YOSEMITE prefixes in area code 209

NANPA records 6 assigned NXX blocks to rate center YOSEMITE in area code 209, 0.8% of the 784 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. 4 holders hold those blocks, the largest being PACIFIC BELL (3), BANDWIDTH.COM CLEC, LLC - CA (1), ONVOY, LLC - CA (1). The earliest assignment on record here is 2021-02-17 and the most recent 2021-02-17. 5 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 code 350 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 209
4 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
209-336 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
209-372 AT&T PACIFIC BELL – yes yes
209-375 AT&T PACIFIC BELL – yes yes
209-379 AT&T PACIFIC BELL – yes yes
209-391 Onvoy ONVOY, LLC - CA – no yes
209-512 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2021-02-17 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
PACIFIC BELL AT&T 3 50%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 16.7%
ONVOY, LLC - CA Onvoy 1 16.7%
PEERLESS NETWORK OF CALIFORNIA, LLC - CA Peerless 1 16.7%

Frequently asked

Which prefixes belong to YOSEMITE in area code 209?

6 blocks: 336, 372, 375, 379, 391, 512. The table above gives the holder of each.

Which carriers have numbers in YOSEMITE?

PACIFIC BELL (3 blocks), BANDWIDTH.COM CLEC, LLC - CA (1 block), ONVOY, LLC - CA (1 block), PEERLESS NETWORK OF CALIFORNIA, 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 YOSEMITE 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 209

All 784 prefixes in 209