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

SUNOL prefixes in area code 925

NANPA records 9 assigned NXX blocks to rate center SUNOL in area code 925, 1.4% of the 640 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. 9 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - CA (1), T-MOBILE USA, INC. (1), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1). 9 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

9 assigned blocks – 1.4% of 925
9 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
925-233 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
925-319 T-Mobile T-MOBILE USA, INC. – yes yes
925-568 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
925-663 MATRIX TELECOM, LLC. S/I/I TNCI - CA – yes yes
925-789 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
925-835 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
925-860 Onvoy ONVOY, LLC - CA – yes yes
925-862 AT&T PACIFIC BELL – yes yes
925-990 UTILITY TELECOM GROUP, 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
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 11.1%
T-MOBILE USA, INC. T-Mobile 1 11.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 11.1%
MATRIX TELECOM, LLC. S/I/I TNCI - CA – 1 11.1%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 1 11.1%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 11.1%
ONVOY, LLC - CA Onvoy 1 11.1%
PACIFIC BELL AT&T 1 11.1%
UTILITY TELECOM GROUP, LLC - CA – 1 11.1%

Frequently asked

Which prefixes belong to SUNOL in area code 925?

9 blocks: 233, 319, 568, 663, 789, 835, 860, 862, 990. The table above gives the holder of each.

Which carriers have numbers in SUNOL?

LEVEL 3 COMMUNICATIONS, LLC - CA (1 block), T-MOBILE USA, INC. (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), MATRIX TELECOM, LLC. S/I/I TNCI - CA (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (1 block), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SUNOL 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 925

All 640 prefixes in 925