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

YOUNTVILLE prefixes in area code 707

NANPA records 10 assigned NXX blocks to rate center YOUNTVILLE in area code 707, 1.3% of the 785 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. 6 holders hold those blocks, the largest being PACIFIC BELL (3), LEVEL 3 COMMUNICATIONS, LLC - CA (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2). The earliest assignment on record here is 2010-01-14 and the most recent 2010-01-14. 9 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

10 assigned blocks – 1.3% of 707
6 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
707-204 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
707-312 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
707-339 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
707-415 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA 2010-01-14 yes yes
707-531 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
707-754 Onvoy ONVOY, LLC - CA – yes yes
707-944 AT&T PACIFIC BELL – no yes
707-945 AT&T PACIFIC BELL – yes yes
707-947 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
707-948 AT&T PACIFIC BELL – 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 30%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 20%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 20%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 10%
ONVOY, LLC - CA Onvoy 1 10%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 10%

Frequently asked

Which prefixes belong to YOUNTVILLE in area code 707?

10 blocks: 204, 312, 339, 415, 531, 754, 944, 945, 947, 948. The table above gives the holder of each.

Which carriers have numbers in YOUNTVILLE?

PACIFIC BELL (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), ONVOY, LLC - CA (1 block), MCIMETRO ACCESS TRANSMISSION 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 YOUNTVILLE 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 707

All 785 prefixes in 707