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

SIMIVALLEY prefixes in area code 805

NANPA records 43 assigned NXX blocks to rate center SIMIVALLEY in area code 805, 5.5% of the 786 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. 14 holders hold those blocks, the largest being PACIFIC BELL (14), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6), NEW CINGULAR WIRELESS PCS, LLC (4). The earliest assignment on record here is 2001-03-01 and the most recent 2023-10-02. 27 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 820 – overlay codes cover the same geography, so a rate center is served by all of them.

43 assigned blocks – 5.5% of 805
14 holders of record
27 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
805-206 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2010-02-09 yes yes
805-210 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2006-11-27 yes yes
805-251 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2012-04-13 yes yes
805-261 Charter TWC IP ENABLED SERVICES, LLC 2016-03-21 yes yes
805-285 Charter TWC IP ENABLED SERVICES, LLC 2008-02-15 yes yes
805-297 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
805-304 T-Mobile T-MOBILE USA, INC. 2002-01-28 yes yes
805-306 AT&T PACIFIC BELL – no yes
805-327 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2012-04-13 yes yes
805-328 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2010-02-22 yes yes
805-362 Onvoy ONVOY, LLC - CA 2023-10-02 yes yes
805-387 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2013-07-01 yes yes
805-404 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
805-416 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
805-422 T-Mobile METROPCS NETWORKS, LLC 2014-05-28 yes yes
805-424 T-Mobile T-MOBILE USA, INC. 2018-01-18 yes yes
805-426 AT&T AT&T - LOCAL – yes yes
805-428 AT&T NEW CINGULAR WIRELESS PCS, LLC 2001-06-26 no yes
805-433 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2001-03-01 yes yes
805-501 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
805-520 AT&T PACIFIC BELL – no yes
805-522 AT&T PACIFIC BELL – no yes
805-526 AT&T PACIFIC BELL – no yes
805-527 AT&T PACIFIC BELL – no yes
805-537 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2012-04-13 yes yes
805-577 AT&T PACIFIC BELL – no yes
805-578 AT&T PACIFIC BELL – no yes
805-579 AT&T PACIFIC BELL – no yes
805-581 AT&T PACIFIC BELL – no yes
805-582 AT&T PACIFIC BELL – no yes
805-583 AT&T PACIFIC BELL – no yes
805-584 AT&T PACIFIC BELL – yes yes
805-587 T-Mobile METROPCS NETWORKS, LLC – yes yes
805-624 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA 2001-05-02 yes yes
805-629 AT&T PACIFIC BELL – no yes
805-638 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
805-791 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2006-08-14 yes yes
805-813 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
805-823 Onvoy ONVOY, LLC - CA – yes yes
805-842 Onvoy ONVOY, LLC - CA – yes yes
805-864 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2015-02-16 yes yes
805-915 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
805-955 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 14 32.6%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 6 14%
NEW CINGULAR WIRELESS PCS, LLC AT&T 4 9.3%
PEERLESS NETWORK OF CALIFORNIA, LLC - CA Peerless 3 7%
ONVOY, LLC - CA Onvoy 3 7%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 2 4.7%
TWC IP ENABLED SERVICES, LLC Charter 2 4.7%
T-MOBILE USA, INC. T-Mobile 2 4.7%
METROPCS NETWORKS, LLC T-Mobile 2 4.7%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 2.3%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 2.3%
AT&T - LOCAL AT&T 1 2.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 2.3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 2.3%

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 SIMIVALLEY in area code 805?

43 blocks: 206, 210, 251, 261, 285, 297, 304, 306, 327, 328, 362, 387 and 31 more, all listed in the table above.

Which carriers have numbers in SIMIVALLEY?

PACIFIC BELL (14 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6 blocks), NEW CINGULAR WIRELESS PCS, LLC (4 blocks), PEERLESS NETWORK OF CALIFORNIA, LLC - CA (3 blocks), ONVOY, LLC - CA (3 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SIMIVALLEY 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 805

All 786 prefixes in 805