510 Area Code Prefixes Directory

If you know the complete number you’re looking up, please use the Phone Number Search above. Or to explore prefixes in different coverage areas, please use the tables below.

Metro PCS
Carrier

Coverage Area
Counties: , Contra Costa, San Francisco, Alameda
Cities: Hayward, Oakland, Richmond, San Francisco, Fremont

Peerless Network Of California
Carrier

Coverage Area
Counties: , Alameda
Cities: Oakland, Hayward, Fremont

American Messaging (am)
Carrier

Coverage Area
Counties: , Contra Costa, Alameda
Cities: Oakland, Hayward, Richmond, Fremont

Pacific Bell
Carrier

Coverage Area
Counties: , Contra Costa, Alameda
Cities: Berkeley, Oakland, Richmond, El Sobrante, Fremont, Hercules, Hayward, Alameda, Albany, San Leandro, Union City, Crockett

Bandwidth.com Clec
Carrier

Coverage Area
Counties: San Francisco, , Contra Costa, Alameda
Cities: San Francisco, Hayward, Richmond, Fremont

T-mobile Usa
Carrier

Coverage Area
Counties: , Contra Costa, San Francisco, Alameda
Cities: Oakland, Richmond, Hayward, Berkeley, San Francisco, Fremont, El Sobrante

Mci Worldcom Communications, Ca
Carrier

Coverage Area
Counties: San Francisco, , Alameda
Cities: San Francisco, Union City, Fremont, Hayward

Teleport Communications Group - San Francisco
Carrier

Coverage Area
Counties: San Francisco, Alameda, , Contra Costa
Cities: San Francisco, Fremont, Hercules, Oakland, Union City, Richmond, Hayward

Allegiance Telecom
Carrier

Coverage Area
Counties: San Francisco, , Alameda
Cities: San Francisco, El Sobrante, Fremont, Oakland, Hayward

Tw Telecom Of California Lp
Carrier

Coverage Area
Counties: , Contra Costa, Alameda
Cities: Oakland, Union City, Richmond, Walnut Creek, Fremont

Mpower Communications Corp
Carrier

Coverage Area
Counties: , Alameda
Cities: Oakland, Hayward, Union City, Fremont

Broadwing Communications
Carrier

Coverage Area
Counties: , San Francisco
Cities: Oakland, Hayward, Hercules, San Francisco, El Sobrante, Union City

Level 3 Communications
Carrier

Coverage Area
Counties: San Francisco, , Alameda, Contra Costa
Cities: San Francisco, Hercules, Fremont, Oakland, Richmond, Hayward

O1 Communications
Carrier

Coverage Area
Counties: , Alameda
Cities: Walnut Creek, Fremont, Alameda, El Sobrante, Hayward

Brooks Fiber Communications Of California
Carrier

Coverage Area
Cities: Sunnyvale

Utility Telephone
Carrier

Coverage Area
Cities: Hayward

Global Crossing Local Services-ca
Carrier

Coverage Area
Counties: , Alameda
Cities: Oakland, Fremont, Union City

Xo California
Carrier

Coverage Area
Counties: , Contra Costa, Alameda
Cities: Berkeley, Richmond, Fremont, Oakland, Hayward, Hercules

U.s. Telepacific Corp.
Carrier

Coverage Area
Counties: , Santa Clara
Cities: Hayward, San Jose, Oakland, Berkeley

Mcimetro Access Transmission Services LLC
Carrier

Coverage Area
Counties: , San Francisco, Alameda
Cities: Hercules, Union City, San Francisco, Fremont, Hayward, El Sobrante

Cf Communications DBA Telekenex
Carrier

Coverage Area
Counties: Alameda, , San Francisco
Cities: Fremont, Hayward, San Francisco

33 Wireless Inc.
Carrier

Coverage Area
Cities: Oakland, Hayward

Mpower Networks Services Inc.
Carrier

Coverage Area
Counties: Alameda
Cities: Fremont

North County Communications Corp.
Carrier

Coverage Area
Cities: Berkeley

Paetec Communications
Carrier

Coverage Area
Cities: Oakland

American Messaging Services
Carrier

Coverage Area
Cities: Berkeley, Hayward, Oakland, Union City

Centurylink Communications LLC
Carrier

Coverage Area
Counties: Contra Costa
Cities: Richmond

Sbc Internet Services
Carrier

Coverage Area
Cities: San Leandro, Hayward

The Telephone Connection Local Services
Carrier

Coverage Area
Cities: Oakland

The 510 area code is located in San Jose, California including Hayward, Oakland and was originally put into service on January 14th 2000. Find whose number this is.

Recently Reported Numbers

(510) 671-9306Unknown

I have been getting at least one of these calls a day for weeks now. The numbers are all from my area code, but totally different after that. Today, it was 510-671-9306. Its very annoying, and I wish I could stop it.

(510) 342-5381Unknown

Can I speak to the person who handles the PG&E account at your residence? Obviously another scammer solar call. I get these daily, but from numbers all over the state.

(510) 324-9475Dangerous

Hello-This is Elizabeth Parker. How are you?Fine Elizabeth. Are you a robot?-No. No. No. (hangs up)

(510) 380-5396Neutral

No answer no message

(510) 561-1799Neutral

No answer no message

(510) 962-9770Unknown

The number called me at work.

(510) 635-2500Neutral

Janitorial solication, 510-635-2500, calller id 510-635-2544

(510) 635-2544Neutral

Janitorial solication, 510-635-2500, calller id 510-635-2544

(510) 722-0427Unknown

RoboScam, BLOCK NOW!

(510) 605-3326Dangerous

Block this number.

Recently Searched Numbers

No additional information reported for these searched numbers. Received a call from any phone number listed below? Please consider helping the community by reporting your experience.

510-845-6361
Report
Pacific Bell
510-381-2813
Report
Cellco Partnership DBA Verizon Wireless
510-871-2167
Report
UNKNOWN
510-920-5122
Report
UNKNOWN
510-268-2408
Report
Pacific Bell
510-180-7797
Report
UNKNOWN
510-223-2993
Report
Pacific Bell
510-791-8326
Report
Pacific Bell
510-504-9491
Report
Cellco Partnership DBA Verizon Wireless
510-140-3857
Report
UNKNOWN
510-770-8713
Report
Pacific Bell
510-992-2113
Report
Pac - West Telecomm
510-957-9544
Report
Allegiance Telecom
510-244-7097
Report
Bandwidth.com Clec
510-734-7152
Report
New Cingular Wireless PCS
510-950-5332
Report
UNKNOWN
510-955-8462
Report
UNKNOWN
510-126-4481
Report
UNKNOWN
510-760-3373
Report
Sprint Spectrum L.p.

Most searched numbers

Cell
All TimeThis Month
510-452-5590First seen 2011-11-01510-753-8082First seen 2013-03-05
510-768-8439First seen 2016-08-19510-753-3778First seen 2013-09-05
510-847-2543First seen 2018-12-09510-426-7016First seen 2010-10-29
510-768-3602First seen 2016-10-19510-392-5470First seen 2018-11-07
510-361-1139First seen 2015-04-04510-676-5327First seen 2018-04-13
Landline
All TimeThis Month
510-475-8711First seen 2019-02-06510-563-1375First seen 2015-05-18
510-150-3066First seen 2012-10-11510-104-4073First seen 2012-12-30
510-551-8839First seen 2012-12-20510-100-3490First seen 2015-08-12
510-249-6837First seen 2014-09-09510-123-7355First seen 2017-03-24
510-502-8646First seen 2010-11-10510-959-6851First seen 2013-09-10

Cities With coverage

CITY LIST
Alameda
Albany
Berkeley
Crockett
El Sobrante
Fremont
Hayward
Hercules
Oakland
Richmond
San Francisco
San Jose
San Leandro
Sunnyvale
Union City
Walnut Creek