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

SNFN SNFN prefixes in area code 818

NANPA records 33 assigned NXX blocks to rate center SNFN SNFN in area code 818, 4.2% of the 781 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. 12 holders hold those blocks, the largest being FRONTIER CALIFORNIA INC. (10), T-MOBILE USA, INC. (8), PACIFIC BELL (COMPETITIVE) (2). The earliest assignment on record here is 2002-01-28 and the most recent 2014-08-28. 25 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 747 – overlay codes cover the same geography, so a rate center is served by all of them.

33 assigned blocks – 4.2% of 818
12 holders of record
25 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
818-233 T-Mobile T-MOBILE USA, INC. 2007-06-22 yes yes
818-256 AT&T PACIFIC BELL (COMPETITIVE) – yes yes
818-270 Frontier FRONTIER CALIFORNIA INC. – yes yes
818-332 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
818-336 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
818-356 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
818-361 Frontier FRONTIER CALIFORNIA INC. – no yes
818-362 Frontier FRONTIER CALIFORNIA INC. – no yes
818-364 Frontier FRONTIER CALIFORNIA INC. – no yes
818-365 Frontier FRONTIER CALIFORNIA INC. – no yes
818-367 Frontier FRONTIER CALIFORNIA INC. – no yes
818-403 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2008-03-19 yes yes
818-408 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
818-447 T-Mobile T-MOBILE USA, INC. 2007-01-05 yes yes
818-470 T-Mobile T-MOBILE USA, INC. – yes yes
818-493 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
818-496 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
818-554 T-Mobile T-MOBILE USA, INC. – yes yes
818-581 T-Mobile T-MOBILE USA, INC. 2002-01-28 yes yes
818-617 AT&T PACIFIC BELL (COMPETITIVE) 2014-08-28 yes yes
818-639 Onvoy ONVOY, LLC - CA – yes yes
818-675 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
818-698 MATRIX TELECOM, LLC. S/I/I TNCI - CA – yes yes
818-723 T-Mobile T-MOBILE USA, INC. – yes yes
818-741 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
818-743 MATRIX TELECOM, LLC. S/I/I TNCI - CA – yes yes
818-744 T-Mobile T-MOBILE USA, INC. 2002-09-20 yes yes
818-792 T-Mobile T-MOBILE USA, INC. 2006-05-12 yes yes
818-833 Frontier FRONTIER CALIFORNIA INC. – no yes
818-837 Frontier FRONTIER CALIFORNIA INC. – no yes
818-838 Frontier FRONTIER CALIFORNIA INC. – yes yes
818-898 Frontier FRONTIER CALIFORNIA INC. – no yes
818-979 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – 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 10 30.3%
T-MOBILE USA, INC. T-Mobile 8 24.2%
PACIFIC BELL (COMPETITIVE) AT&T 2 6.1%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 6.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 6.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 2 6.1%
MATRIX TELECOM, LLC. S/I/I TNCI - CA – 2 6.1%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 1 3%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 3%
ONVOY, LLC - CA Onvoy 1 3%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 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 SNFN SNFN in area code 818?

33 blocks: 233, 256, 270, 332, 336, 356, 361, 362, 364, 365, 367, 403 and 21 more, all listed in the table above.

Which carriers have numbers in SNFN SNFN?

FRONTIER CALIFORNIA INC. (10 blocks), T-MOBILE USA, INC. (8 blocks), PACIFIC BELL (COMPETITIVE) (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SNFN SNFN 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 818

All 781 prefixes in 818