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

LOWER LAKE prefixes in area code 707

NANPA records 10 assigned NXX blocks to rate center LOWER LAKE 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. 7 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - CA (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2), PACIFIC BELL (2). The earliest assignment on record here is 2002-01-28 and the most recent 2023-02-17. 8 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 369 – overlay codes cover the same geography, so a rate center is served by all of them.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
707-295 AT&T NEW CINGULAR WIRELESS PCS, LLC 2002-01-28 yes yes
707-350 UNITED STATES CELLULAR - CA – yes yes
707-461 IP HORIZON LLC – yes yes
707-692 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
707-701 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
707-850 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2020-03-20 yes yes
707-905 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2023-02-17 yes yes
707-993 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
707-994 AT&T PACIFIC BELL – no yes
707-995 AT&T PACIFIC BELL – no 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
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 20%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 20%
PACIFIC BELL AT&T 2 20%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 10%
UNITED STATES CELLULAR - CA – 1 10%
IP HORIZON LLC – 1 10%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 10%

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 LOWER LAKE in area code 707?

10 blocks: 295, 350, 461, 692, 701, 850, 905, 993, 994, 995. The table above gives the holder of each.

Which carriers have numbers in LOWER LAKE?

LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2 blocks), PACIFIC BELL (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (1 block), UNITED STATES CELLULAR - CA (1 block), IP HORIZON 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 LOWER LAKE 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