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Area Code 510

California · Pacific time · now 11:55 AM

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Area code 510 is a real California area code

Calls from 510 normally come from California — 20 cities across 4 counties, in the Pacific time zone. Our archive holds 2,681 caller reports on 811 numbers in this area code.

  • A valid area code is not a guarantee — any number can be spoofed to look local.
  • If the caller claims to be your bank or a government agency, hang up and dial the number printed on your card or their official site.

Check the exact number that called you

An area code only tells you the region. Search the full number to see listings and reports for it.

CAstate
20cities served
36carriers
11:55 AMlocal time

Where is area code 510?

Area code 510 serves California, covering Oakland, Hayward, Fremont, San Francisco, Newark. In total our directory records 800 phone prefixes in this area code, spread across 20 cities and 4 counties.

The area code sits in the Pacific time zone (UTC-08:00), where the local time is now approximately 11:55 AM. The oldest prefix on record here entered service on 1994-02-04, and the newest on 2015-10-02.

Of the prefixes with a known line type, 33% are wireless and 67% landline — 235 mobile against 479 fixed-line prefixes.

Area code 510 on the map

California is highlighted below. Schematic map — each square is one state or territory.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPRVI

Line types in this area code

Landline prefixes479 · 67%
Wireless prefixes235 · 33%
Time zonePacific
UTC offset-08:00
In service since1994
Counties covered4

Carriers operating in area code 510

Telephone companies holding prefixes in this area code, ranked by how many they operate.

CarrierLine typePrefixes
Pacific BellLandline278
New Cingular Wireless Pcs, LlcWireless65
Sprint Spectrum L.p.Wireless54
Cellco Partnership Dba Verizon WirelessWireless51
Pac - West Telecomm, Inc.Landline23
T-Mobile Usa, Inc.Wireless19
American Messaging Services, LlcWireless18
Usa Mobility Wireless, Inc.Wireless17
Teleport Communications Group - San FranciscoLandline17
Bandwidth.com Clec, LlcLandline15
Xo California, Inc.Landline13
Mcimetro Access Transmission Services LlcLandline13
Mpower Communications CorpLandline12
Comcast Phone Of California, LlcLandline10
Level 3 Communications, LlcLandline10

Cities in area code 510

Places served by this area code, with the number of prefixes assigned to each.

Oakland249 prefixes · AlamedaHayward91 prefixes · AlamedaFremont75 prefixes · AlamedaSan Francisco63 prefixes · San FranciscoNewark47 prefixes · AlamedaBerkeley43 prefixes · AlamedaRichmond33 prefixes · Contra CostaEl Sobrante20 prefixes · Contra CostaEmeryville19 prefixes · AlamedaCastro Valley16 prefixes · AlamedaSan Leandro14 prefixes · AlamedaAlameda13 prefixes · AlamedaUnion City10 prefixes · AlamedaRodeo10 prefixes · Contra CostaCrockett4 prefixes · Contra CostaHercules2 prefixes · Contra CostaWalnut Creek2 prefixes · Contra CostaSan Jose2 prefixes · Santa ClaraSunnyvale1 prefixes · Santa ClaraContra Costa1 prefixes · Contra Costa

Caller reports for area code 510

Aggregated from 2,681 reports covering 811 distinct numbers in this area code (2015–2017 archive).

Reported call types

Unknown1,193Telemarketer750Debt Collector128Prank Call48Prank Caller44Non-profit Organization19Survey16SMS13

Most reported numbers

510-675-701342 reports510-962-456139 reports510-224-201137 reports510-907-897237 reports510-943-304037 reports510-230-088035 reports510-699-923135 reports510-215-211235 reports

Who callers said they were

Names people entered when reporting a call from this area code.

California Pal ×37Payment Systems ×26Out of area ×23? ×20Unknown ×20IRS ×14Scammer ×12NORRIS L ×11PRETTI GREG ×11unavailable ×10Kaiser Permanente ×10Fair Processing ×9

Report activity by year

20151,230 · 85%
20161,451 · 100%

Numbers reported in area code 510

Each number below was reported by someone who received a call from it. “Reported as” is the name the caller gave or that the recipient recognised — what people wrote down, not verified ownership.

NumberReportsCall typeReported asLast report
510-675-701342Debt Collector, Prank Caller, Telemarketer, UnknownFremont CA / Fremont, CA / POWER Center2016-04-21
510-962-456139Telemarketer, UnknownUTH / Windows tech support2016-04-23
510-224-201137Telemarketer, Unknown—2016-04-28
510-907-897237Prank Caller, Telemarketer, Unknown—2016-05-02
510-943-304037Debt Collector, Prank Caller, Telemarketer, UnknownTech Services2016-05-02
510-230-088035Telemarketer, Unknown...Research Group / Avian research / Avion / Avion BPO Solutions2016-04-30
510-699-923135Telemarketer, UnknownCAP SVCS / Card Services / Customer Service / heather from Card Services2016-04-28
510-215-211235Debt Collector, Telemarketer, UnknownCard Member Services / Card Services2016-04-26
510-373-386335Prank Caller, Telemarketer, UnknownPayment Systems2016-04-22
510-764-449234Telemarketer, UnknownOut of area2016-04-17
510-270-018830Telemarketer, Unknownauto insurance of america2016-04-29
510-248-070130Telemarketer, Unknown&quot-CALIFORNIA CALL&quot-/&quot-CONTACT CENTER&quot- / All kinds of things to sell - Telemarketing group / Energy Savings / LEVEL 3 PHONETERRORISTS2016-04-28
510-903-934328Telemarketer, Unknown—2016-05-02
510-373-386925Telemarketer, UnknownCalifornia PAL2016-04-24
510-215-511224Telemarketer, Unknown—2016-04-29
510-205-794823Telemarketer, UnknownClaimed to be with Paradise Builders / Golden State ???? / Golden State something2016-04-22
510-699-922120Telemarketer, UnknownJill Scott Total Healthcare / Pacific Health Benefits / Telemarketer2016-04-28
510-214-781820Unknown—2016-05-02
510-256-035119Debt Collector, Prank Call, Unknown???? / Baker &amp- McKinsey / Brinker Alliance Group? / Kevin Mason2016-04-29
510-830-109818Debt Collector, Telemarketer, Unknown"Christie with reward redemption" / Greenfield / REWARD REDEMPTION2016-04-06
510-830-112718Non-profit Organization, Telemarketer, UnknownGreat company / unkown2016-03-26
510-275-011616Telemarketer, UnknownSolar America2016-04-27
510-230-754616Telemarketer, UnknownJames Allen2016-04-05
510-722-600716Telemarketer, Unknowntrinity payday loan2016-04-15
510-842-567916Debt Collector, UnknownFirst National Collection Bureau2016-05-01
510-373-384516Telemarketer, UnknownCalifornia Pal2016-04-23
510-201-005814Debt Collector"Internal Revenue Service" / ?? / IRS / IRS Lawsuit Scam2016-02-24
510-898-774413Telemarketer, UnknownLarry Bivens2016-04-09
510-452-093613Event Reminder, Non-profit Organization, Survey, Trusted CallerG2 Forensic Investigations / Kaiser / Kaiser Permanente / Pac- Bell2016-04-21
510-214-887113Debt Collector, Unknown—2016-04-18
510-686-891713Telemarketer, UnknownCalifornia PAL2016-04-15
510-256-586613Telemarketer, Unknown—2016-04-20
510-830-136212Telemarketer, Unknown? / Locksmith Company in Oakland, CA / Retired / Reward Center2016-04-19
510-699-615212Telemarketer, Unknown—2016-04-16
510-423-623512TelemarketerCall ID Spoofer / General contractor / Home Center / home improvement idiots2016-04-17
510-256-036212Debt Collector, UnknownSamual Bishop2016-04-21
510-306-733712Event Reminder, SMSPay Processing / Square / Square One Order / Square, I think.2016-04-20
510-545-804712Non-profit Organization, Telemarketer"Correctional Peace Officers of Alameda County" / alameda county peace officer / Alameda peace correction officer / Correctional Peace Officers of Alameda County2016-04-30
510-724-305811TelemarketerNORRIS L2016-04-12
510-675-702011Telemarketer, Unknownthieves2016-04-19
510-781-510011Unknown—2016-03-12
510-699-638411Telemarketer? / ?? / Medical Alert Scam / medical alert system2016-04-19
510-338-229111Telemarketer, Unknown—2016-04-04
510-735-260011—Either ZipRealty or an imposter / No caller ID / unknown, showing as from CA / Zip Realty2016-04-21
510-734-206511TelemarketerPRETTI GREG2016-04-25
510-981-459010Telemarketer, Unknown? / SBC MESSAGING / SJ Mercury News / SS&amp-SI2016-04-26
510-556-524410Debt Collector, TelemarketerCustomer Service / Home Security / Home Security ? / Scammer2016-03-11
510-281-064410Debt Collector, Non-profit Organization, Telemarketer"California Call" / California Police Youth Charities / Currently: PAI / Oakland, CA2016-04-24
510-343-350210Debt Collector, UnknownPORTFOLIO RECOVERY2016-04-22
510-709-437410Telemarketer, UnknownJack peterson2016-04-26
510-931-581010Prank Caller, Unknown—2016-04-20
510-945-880710TelemarketerCleansDuctSystem / Fresh Air United Builders / Fresh Air? / name unavailable2016-04-06
510-315-255010Debt Collector, Prank Call, UnknownDavid Gregg / scam IRS / US Treasury2016-04-16
510-443-003110Debt Collector, Prank CallCriminal Fraud / Fake IRS / IRS / irs caller2016-05-01
510-590-037110Telemarketer, Unknown—2016-05-01
510-201-921210TelemarketerI dont know / Lisa / Retinol Serum / scammer2016-03-03
510-681-293510Debt CollectorCELLULAR CALL / Dennis Gray / Kenneth Gray/"United States Treasury" / not sure2016-04-14
510-474-54419Prank Call, TelemarketerAssist / Google fake / Google the RoboRat / hanger upper2016-03-17
510-343-52119Debt Collector510-343-5211=Portfolio Recovery with new number / Portfolio / Portfolio Recovery / Portfolio Recovery - Blocked2016-05-01
510-505-17039Prank Caller, Telemarketer, UnknownEL Paso Times2016-04-09

Showing the 60 most-reported of 811 numbers on record for this area code.

Directory listings in area code 510

11 listings from the YPState archive use this area code.

Azucena Jose MEmeryville, California510-658-7982Britt MichaelEmeryville, California510-655-5104Chao Homer HFremont, California510-795-7872Dupont JimAlameda, California510-523-3755Glick Amy MftBerkeley, California510-525-9894Jones KEmeryville, California510-655-6969Little REmeryville, California510-655-6091Olive Branch Missionary Baptist ChurchEmeryville, California510-658-5707Opm Investments IncEmeryville, California510-653-8000Ortiz Alejandra MEmeryville, California510-654-3430Paige PEmeryville, California510-652-1127

ZIP codes in area code 510

Postal codes recorded against prefixes in this area code.

94085940869408994102941039410494105941079410894110941119411294124941309413494501945029452594536945389453994541945429454494545945469454794555945609456494572945779457894579945879459594596945989460194602946039460594606946079460894609946109461194612946159461794618946199462194703947049470694709947109480194803948049480594850951019513195134

Phone prefixes in area code 510

Each prefix (the first three digits after the area code) is assigned to a carrier and a service area. Showing the first 200 of 800.

PrefixCityCountyCarrierTypeIn service
510-200HaywardAlamedaMetro Pcs, Inc.Wireless2008-11-12
510-201OaklandAlamedaPeerless Network Of California, LlcLandline2009-02-14
510-202OaklandAlamedaAmerican Messaging Services, LlcWireless1995-02-11
510-203——T-Mobile Usa, Inc.—2015-09-22
510-204BerkeleyAlamedaPacific BellLandline1994-02-04
510-205San FranciscoSan FranciscoSprint Spectrum L.p.Wireless1999-02-27
510-206OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1995-07-04
510-207OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1995-07-04
510-208OaklandAlamedaPacific BellLandline1994-02-04
510-209HaywardAlamedaSprint Spectrum L.p.Wireless2001-06-30
510-210San FranciscoSan FranciscoBandwidth.com Clec, LlcLandline2013-01-04
510-211—————
510-212FremontAlamedaUsa Mobility Wireless, Inc.Wireless1997-07-06
510-213OaklandAlamedaT-Mobile Usa, Inc.Wireless2002-09-19
510-214San FranciscoSan FranciscoMci Worldcom Communications, Inc., CaLandline1996-04-15
510-215RichmondContra CostaPacific BellLandline1994-02-04
510-216NewarkAlamedaUsa Mobility Wireless, Inc.Wireless1999-10-13
510-217San FranciscoSan FranciscoTeleport Communications Group - San FranciscoLandline1996-04-15
510-218FremontAlamedaUsa Mobility Wireless, Inc.Wireless1995-07-04
510-219OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1995-07-04
510-220OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1994-02-04
510-221OaklandAlamedaSprint Spectrum L.p.Wireless2007-02-08
510-222El SobranteContra CostaPacific BellLandline1994-02-04
510-223El SobranteContra CostaPacific BellLandline1994-02-04
510-224RodeoContra CostaSprint Spectrum L.p.Wireless2001-10-18
510-225San FranciscoSan FranciscoAllegiance Telecom, Inc.Landline1999-07-22
510-226FremontAlamedaPacific BellLandline1994-02-04
510-227OaklandAlamedaTw Telecom Of California LpLandline1999-07-22
510-228OaklandAlamedaPac - West Telecomm, Inc.Landline1999-07-22
510-229OaklandAlamedaPacific BellLandline1999-07-22
510-230RichmondContra CostaT-Mobile Usa, Inc.Wireless2007-02-15
510-231RichmondContra CostaPacific BellLandline1994-02-04
510-232RichmondContra CostaPacific BellLandline1994-02-04
510-233RichmondContra CostaPacific BellLandline1994-02-04
510-234RichmondContra CostaPacific BellLandline1994-02-04
510-235RichmondContra CostaPacific BellLandline1994-02-04
510-236RichmondContra CostaPacific BellLandline1994-02-04
510-237RichmondContra CostaPacific BellLandline1994-02-04
510-238OaklandAlamedaPacific BellLandline1994-02-04
510-239OaklandAlamedaMpower Communications CorpLandline1996-04-15
510-240FremontAlamedaTw Telecom Of California LpLandline1999-05-10
510-241——T-Mobile Usa, Inc.—2015-09-22
510-242RichmondContra CostaPacific BellLandline1994-02-04
510-243El SobranteContra CostaPacific BellLandline1994-02-04
510-244HaywardAlamedaBandwidth.com Clec, LlcLandline2011-07-25
510-245HerculesContra CostaPacific BellLandline1994-02-04
510-246HaywardAlamedaCellco Partnership Dba Verizon WirelessWireless2011-08-09
510-247Castro ValleyAlamedaPacific BellLandline1994-02-04
510-248NewarkAlamedaPac - West Telecomm, Inc.Landline2000-10-31
510-249FremontAlamedaPacific BellLandline1994-02-04
510-250OaklandAlamedaBroadwing Communications, LlcLandline1998-11-20
510-251OaklandAlamedaPacific BellLandline1994-02-04
510-252FremontAlamedaPacific BellLandline1994-02-04
510-253RichmondContra CostaTw Telecom Of California LpLandline1999-10-13
510-254San FranciscoSan FranciscoLevel 3 Communications, LlcLandline2011-09-15
510-255RichmondContra CostaBandwidth.com Clec, LlcLandline2011-04-28
510-256Walnut CreekContra CostaO1 Communications, Inc.Landline2001-06-30
510-257FremontAlamedaTeleport Communications Group - San FranciscoLandline2000-01-14
510-258HaywardAlamedaPacific BellLandline2000-08-20
510-259HaywardAlamedaPacific BellLandline1996-10-15
510-260OaklandAlamedaComcast Phone Of California, LlcLandline1998-05-18
510-261OaklandAlamedaPacific BellLandline1994-02-04
510-262El SobranteContra CostaPacific BellLandline1994-02-04
510-263AlamedaAlamedaPacific BellLandline1994-02-04
510-264HaywardAlamedaPacific BellLandline1994-02-04
510-265HaywardAlamedaPacific BellLandline1994-02-04
510-266HaywardAlamedaPacific BellLandline1996-04-15
510-267OaklandAlamedaPacific BellLandline1996-01-10
510-268OaklandAlamedaPacific BellLandline1994-02-04
510-269San FranciscoSan FranciscoMci Worldcom Communications, Inc., CaLandline1994-02-04
510-270SunnyvaleSanta ClaraBrooks Fiber Communications Of CaliforniaLandline1997-04-01
510-271OaklandAlamedaPacific BellLandline1994-02-04
510-272OaklandAlamedaPacific BellLandline1994-02-04
510-273OaklandAlamedaPacific BellLandline1994-02-04
510-274HaywardAlamedaUtility Telephone, Inc.Landline1999-10-13
510-275OaklandAlamedaPac - West Telecomm, Inc.Landline2000-10-31
510-276HaywardAlamedaPacific BellLandline1994-02-04
510-277OaklandAlamedaGlobal Crossing Local Services, Inc.-CaLandline2000-06-13
510-278HaywardAlamedaPacific BellLandline1994-02-04
510-279FremontAlamedaPac - West Telecomm, Inc.Landline2000-01-14
510-280BerkeleyAlamedaXo California, Inc.Landline1999-07-22
510-281OaklandAlamedaPac - West Telecomm, Inc.Landline1996-10-15
510-282OaklandAlamedaT-Mobile Usa, Inc.Wireless2001-12-26
510-283El SobranteContra CostaAllegiance Telecom, Inc.Landline2001-06-30
510-284FremontAlamedaPacific BellLandline2001-06-30
510-285San FranciscoSan FranciscoMci Worldcom Communications, Inc., CaLandline1996-04-15
510-286OaklandAlamedaPacific BellLandline1994-02-04
510-287OaklandAlamedaPacific BellLandline1994-02-04
510-288OaklandAlamedaPac - West Telecomm, Inc.Landline1996-07-01
510-289OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1995-07-04
510-290San FranciscoSan FranciscoSprint Spectrum L.p.Wireless1998-08-14
510-291OaklandAlamedaPac - West Telecomm, Inc.Landline1996-10-15
510-292BerkeleyAlamedaPacific BellLandline2001-03-03
510-293HaywardAlamedaPacific BellLandline1994-02-04
510-294HaywardAlamedaSprint Spectrum L.p.Wireless2011-11-04
510-295OaklandAlamedaPac - West Telecomm, Inc.Landline2000-06-13
510-296RodeoContra CostaLevel 3 Communications, LlcLandline2001-06-30
510-297San LeandroAlamedaPacific BellLandline1994-02-04
510-298NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless2012-12-07
510-299NewarkAlamedaCellco Partnership Dba Verizon WirelessWireless2001-06-30
510-300HaywardAlamedaU.s. Telepacific Corp.Landline2000-08-20
510-301OaklandAlamedaCellco Partnership Dba Verizon WirelessWireless1995-07-04
510-302OaklandAlamedaPacific BellLandline1994-02-04
510-303HaywardAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-304NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless1997-04-01
510-305HaywardAlamedaNew Cingular Wireless Pcs, LlcWireless1996-04-15
510-306San FranciscoSan FranciscoSprint Spectrum L.p.Wireless2001-06-30
510-307RichmondContra CostaPacific BellLandline1994-02-04
510-308OaklandAlamedaUsa Mobility Wireless, Inc.Wireless1994-02-04
510-309El SobranteContra CostaT-Mobile Usa, Inc.Wireless2014-10-24
510-310OaklandAlamedaUsa Mobility Wireless, Inc.Wireless1994-02-04
510-311—————
510-312HaywardAlamedaAmerican Messaging Services, LlcWireless2000-01-14
510-313RodeoContra CostaTeleport Communications Group - San FranciscoLandline2001-06-30
510-314HaywardAlamedaSprint Spectrum L.p.Wireless2007-07-02
510-315HaywardAlamedaBroadwing Communications, LlcLandline1999-05-10
510-316OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-317HaywardAlamedaPacific BellLandline1994-02-04
510-318OaklandAlamedaCellco Partnership Dba Verizon WirelessWireless1998-11-20
510-319————1995-07-04
510-320NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless2013-09-12
510-321OaklandAlamedaUsa Mobility Wireless, Inc.Wireless1994-02-04
510-322RodeoContra CostaMcimetro Access Transmission Services LlcLandline1996-10-15
510-323RichmondContra CostaXo California, Inc.Landline1999-10-13
510-324Union CityAlamedaPacific BellLandline2000-01-14
510-325OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1997-07-06
510-326OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1997-07-06
510-327RodeoContra CostaPac - West Telecomm, Inc.Landline2001-03-03
510-328OaklandAlamedaSprint Spectrum L.p.Wireless2013-01-31
510-329HaywardAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-330————1996-04-15
510-331HaywardAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-332OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-333OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-334RichmondContra CostaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-335NewarkAlamedaCf Communications, Llc Dba TelekenexLandline2012-01-27
510-336OaklandAlamedaPacific BellLandline1996-07-01
510-337AlamedaAlamedaPacific BellLandline1994-09-11
510-338OaklandAlamedaPacific BellLandline1996-07-01
510-339OaklandAlamedaPacific BellLandline1994-02-04
510-340HaywardAlamedaCellco Partnership Dba Verizon WirelessWireless2012-05-04
510-341—————
510-342HaywardAlamedaMpower Communications CorpLandline1997-10-11
510-343OaklandAlamedaMpower Communications CorpLandline1997-10-11
510-344FremontAlamedaGlobal Crossing Local Services, Inc.-CaLandline2000-01-14
510-345————1997-10-11
510-346San LeandroAlamedaPacific BellLandline1998-01-25
510-347San LeandroAlamedaPacific BellLandline1996-04-15
510-348OaklandAlameda33 Wireless Inc.Wireless1997-07-06
510-349RichmondContra CostaAmerican Messaging Services, LlcWireless1998-01-25
510-350OaklandAlamedaTeleport Communications Group - San FranciscoLandline1998-01-25
510-351San LeandroAlamedaPacific BellLandline1994-02-04
510-352San LeandroAlamedaPacific BellLandline1994-02-04
510-353FremontAlamedaPacific BellLandline1994-09-11
510-354FremontAlamedaPacific BellLandline1995-02-11
510-355OaklandAlamedaGlobal Crossing Local Services, Inc.-CaLandline2000-01-14
510-356BerkeleyAlamedaPacific BellLandline2007-11-28
510-357San LeandroAlamedaPacific BellLandline1994-02-04
510-358NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless2011-07-08
510-359HaywardAlamedaCellco Partnership Dba Verizon WirelessWireless2012-08-17
510-360FremontAlamedaPacific BellLandline1998-01-25
510-361HaywardAlamedaTw Telecom Of California LpLandline2014-10-27
510-362HaywardAlamedaT-Mobile Usa, Inc.Wireless2013-05-16
510-363HaywardAlamedaCellco Partnership Dba Verizon WirelessWireless2008-01-14
510-364NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless2001-11-28
510-365BerkeleyAlamedaT-Mobile Usa, Inc.Wireless2013-09-26
510-366NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-367RichmondContra CostaNew Cingular Wireless Pcs, LlcWireless1998-01-25
510-368OaklandAlamedaCellco Partnership Dba Verizon WirelessWireless1997-01-11
510-369—————
510-370HaywardAlamedaPeerless Network Of California, LlcLandline2012-04-13
510-371NewarkAlamedaLevel 3 Communications, LlcWireless2008-08-07
510-372HaywardAlamedaPac - West Telecomm, Inc.Landline1999-10-13
510-373OaklandAlamedaPac - West Telecomm, Inc.Landline1999-10-13
510-374RichmondContra CostaPacific BellLandline1994-02-04
510-375San FranciscoSan FranciscoT-Mobile Usa, Inc.Wireless2001-12-26
510-376NewarkAlamedaSprint Spectrum L.p.Wireless2000-01-14
510-377NewarkAlamedaSprint Spectrum L.p.Wireless2000-08-20
510-378NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless2000-06-13
510-379OaklandAlamedaTw Telecom Of California LpLandline1998-05-18
510-380OaklandAlamedaPac - West Telecomm, Inc.Landline1994-02-04
510-381OaklandAlamedaCellco Partnership Dba Verizon WirelessWireless1994-02-04
510-382OaklandAlamedaPacific BellLandline1994-02-04
510-383OaklandAlamedaPacific BellLandline1997-01-11
510-384OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1997-10-11
510-385OaklandAlamedaSprint Spectrum L.p.Wireless1994-02-04
510-386NewarkAlamedaNew Cingular Wireless Pcs, LlcWireless1997-10-11
510-387OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1997-10-11
510-388OaklandAlamedaNew Cingular Wireless Pcs, LlcWireless1998-05-18
510-389OaklandAlamedaAmerican Messaging Services, LlcWireless1996-01-10
510-390OaklandAlamedaCellco Partnership Dba Verizon WirelessWireless1998-05-18
510-391OaklandAlamedaAmerican Messaging Services, LlcWireless1996-01-10
510-392OaklandAlamedaAmerican Messaging Services, LlcWireless1997-04-01
510-393San FranciscoSan FranciscoSprint Spectrum L.p.Wireless1999-05-10
510-394OaklandAlamedaTeleport Communications Group - San FranciscoLandline1998-05-18
510-395OaklandAlamedaTeleport Communications Group - San FranciscoLandline1998-05-18
510-396NewarkAlamedaT-Mobile Usa, Inc.Wireless2001-12-26
510-397HaywardAlamedaComcast Phone Of California, LlcLandline2008-08-28
510-398HaywardAlamedaBandwidth.com Clec, LlcLandline2012-08-17
510-399—————

Frequently asked questions

Where is area code 510?

Area code 510 serves California, including Oakland. It covers 20 cities across 4 counties, in the Pacific time zone.

What time is it in area code 510?

Area code 510 observes Pacific time (UTC-08:00). The current local time is approximately 11:55 AM.

When was area code 510 introduced?

The earliest phone prefix recorded in area code 510 was put in service on 1994-02-04. The most recent was activated on 2015-10-02.

Is a call from 510 safe to answer?

Our directory holds 2,681 caller reports covering 811 numbers in area code 510. A valid area code does not guarantee a legitimate caller, since numbers can be spoofed.

What cities are in area code 510?

The largest places served by area code 510 are Oakland, Hayward, Fremont, San Francisco, Newark, Berkeley, Richmond, El Sobrante. In total it covers 20 cities across 4 counties.

How is a 510 phone number written?

A number in this area code is written +1 (510) XXX-XXXX in international format, or (510) XXX-XXXX domestically. The +1 is the country code shared by the United States, Canada and other NANP members.

Can scammers fake a 510 number?

Yes. Caller ID was built without verification, so a caller can display almost any number. Scammers often pick a number matching the area code of the person they are calling — known as neighbour spoofing — because a local-looking call is answered more often. The US industry response, STIR/SHAKEN, lets carriers sign and verify caller ID, but coverage is still incomplete.

Why do I get calls from numbers with my own area code?

Almost always neighbour spoofing: the caller fabricates a number sharing your area code, and sometimes your prefix, so the call looks like it comes from someone nearby. A matching area code is not evidence that the caller is local.

How do I report a spam call from 510?

Report unwanted calls to the FTC at reportfraud.ftc.gov, and add your number to the Do Not Call registry at donotcall.gov. Include the caller ID number even if you believe it was spoofed — regulators use the pattern of reports, not the individual number.

Other area codes in California

Area code 20965 citiesArea code 2134 citiesArea code 31020 citiesArea code 32325 citiesArea code 40814 citiesArea code 41516 citiesArea code 42417 citiesArea code 44227 citiesArea code 530127 citiesArea code 55959 citiesArea code 56218 citiesArea code 61914 cities

Where this data comes from

Different parts of this page carry different levels of reliability. Here is what each one rests on.

DataBased onReliabilityCovers
Area code & prefix dataNANPA prefix recordshighcompiled 2018
Caller reportsconsumer-submitted reportsconsumer-reported2015–2017 archive
Directory listingsYPState archivehigh2004–2020

About the caller reports: these were submitted by members of the public and are not verified. They record what a caller ID displayed and what the recipient made of the call — they are not proof of who owns a number, and because caller ID can be faked, a reported number may have nothing to do with the person actually calling.

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