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

RESEDA prefixes in area code 818

NANPA records 33 assigned NXX blocks to rate center RESEDA 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. 11 holders hold those blocks, the largest being PACIFIC BELL (16), T-MOBILE USA, INC. (3), ONVOY, LLC - CA (3). The earliest assignment on record here is 2001-11-29 and the most recent 2016-02-08. 19 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
11 holders of record
19 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
818-201 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
818-213 T-Mobile T-MOBILE USA, INC. 2015-01-13 yes yes
818-214 Onvoy ONVOY, LLC - CA 2016-02-08 yes yes
818-300 AT&T PACIFIC BELL – yes yes
818-342 AT&T PACIFIC BELL – no yes
818-343 AT&T PACIFIC BELL – no yes
818-344 AT&T PACIFIC BELL – no yes
818-345 AT&T PACIFIC BELL – no yes
818-401 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
818-457 T-Mobile METROPCS NETWORKS, LLC 2008-11-07 yes yes
818-462 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
818-514 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2010-06-11 yes yes
818-578 Charter TWC IP ENABLED SERVICES, LLC – yes yes
818-600 Onvoy ONVOY, LLC - CA – yes yes
818-609 AT&T PACIFIC BELL – no yes
818-614 T-Mobile METROPCS NETWORKS, LLC 2007-03-20 yes yes
818-654 AT&T PACIFIC BELL – yes yes
818-668 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
818-674 T-Mobile T-MOBILE USA, INC. 2001-11-29 yes yes
818-697 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2013-06-06 yes yes
818-705 AT&T PACIFIC BELL – no yes
818-708 AT&T PACIFIC BELL – no yes
818-757 AT&T PACIFIC BELL – no yes
818-758 AT&T PACIFIC BELL – no yes
818-774 AT&T PACIFIC BELL – no yes
818-776 AT&T PACIFIC BELL – no yes
818-798 AT&T PACIFIC BELL 2012-02-14 yes yes
818-881 AT&T PACIFIC BELL – no yes
818-921 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
818-938 Charter TWC IP ENABLED SERVICES, LLC 2013-06-13 yes yes
818-943 T-Mobile T-MOBILE USA, INC. 2002-05-17 no yes
818-975 Onvoy ONVOY, LLC - CA – yes yes
818-996 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
PACIFIC BELL AT&T 16 48.5%
T-MOBILE USA, INC. T-Mobile 3 9.1%
ONVOY, LLC - CA Onvoy 3 9.1%
METROPCS NETWORKS, LLC T-Mobile 2 6.1%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 2 6.1%
TWC IP ENABLED SERVICES, LLC Charter 2 6.1%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 3%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 3%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 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 RESEDA in area code 818?

33 blocks: 201, 213, 214, 300, 342, 343, 344, 345, 401, 457, 462, 514 and 21 more, all listed in the table above.

Which carriers have numbers in RESEDA?

PACIFIC BELL (16 blocks), T-MOBILE USA, INC. (3 blocks), ONVOY, LLC - CA (3 blocks), METROPCS NETWORKS, LLC (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (2 blocks), TWC IP ENABLED SERVICES, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is RESEDA 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