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) 626-9069Dangerous

Caller I.D. showing, "UNASSIGNED UNAS", whatever that's supposed to mean. Did not pick up, no message left. From outside of my local area code.

(510) 403-1975Unknown

they never leave a message.

(510) 200-2834Unknown

Msg had one word or part of a word that was unintelligible at the beginning of the message and then silence to the end. Blocking,

(510) 344-5133Dangerous

Now showing on another site as a robot call. SCAM?SPAM.

(510) 244-4501Dangerous

Caller hides behind "unknown name" and leaves no message. Other sites show this as a robot call. Assume scam/spam.

(510) 537-4241Dangerous

Caller hid behind "unknown name" and left no message. I have been inundated with scam/spam calls all day, and assume this is another. Otherwise, they would leave a message.

(510) 382-3480Unknown

I received a missed call notification. I returned the call and this is a disconnect, not in service phone number. I will block immediately.

(510) 544-7461Unknown

Got a call on my cell.

(510) 661-8847Neutral

Their original call hid their name behind "Private Name". When called back, this number was answered by a machine for a company called Quantum Cleaners. I am on the DNC list and they are ignoring that. I don't think I want to do business with a company that ignores standards and rules.

(510) 254-0183Neutral

Called several times from Donald Trumo.

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.

510-680-7499
Report
Centurylink Communications LLC
510-415-2801
Report
T-mobile Usa
510-871-6272
Report
UNKNOWN
510-563-9583
Report
Pacific Bell
510-329-4500
Report
New Cingular Wireless PCS
510-695-1387
Report
Cellco Partnership DBA Verizon Wireless
510-331-8153
Report
New Cingular Wireless PCS
510-611-2232
Report
UNKNOWN
510-828-4760
Report
Cellco Partnership DBA Verizon Wireless
510-430-9759
Report
Pacific Bell
510-387-4277
Report
New Cingular Wireless PCS
510-787-6860
Report
Pacific Bell
510-758-6358
Report
Pacific Bell
510-999-2441
Report
Cf Communications DBA Telekenex
510-567-6026
Report
Pacific Bell
510-740-6932
Report
Xo California
510-558-6778
Report
Pacific Bell
510-288-1638
Report
Pac - West Telecomm
510-371-9707
Report
Level 3 Communications

Most searched numbers

Cell
All TimeThis Month
510-447-3777First seen 2013-09-09510-344-5434First seen 2018-05-03
510-722-2021First seen 2016-07-28510-824-4764First seen 2018-06-19
510-417-5493First seen 2017-02-20510-375-8424First seen 2013-11-22
510-370-9201First seen 2019-07-29510-484-8405First seen 2018-05-04
510-932-9643First seen 2013-10-06510-568-1198First seen 2012-11-27
Landline
All TimeThis Month
510-193-1807First seen 2019-03-16510-899-9657First seen 2015-02-12
510-277-2109First seen 2015-07-16510-812-6216First seen 2012-04-27
510-418-6339First seen 2014-10-13510-849-6357First seen 2011-06-02
510-449-6038First seen 2012-02-13510-124-7063First seen 2016-03-23
510-520-3216First seen 2013-03-22510-321-7604First seen 2018-10-08

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