Home › California › Alameda

Alameda, CA Area Codes

Alameda, California (population 76,876) uses area codes 510 and 341.

Area code510
Area code341
Time zonePacific
Local time now…

Alameda has no telephone exchange of its own in NANPA records; it is served by the Oakland exchange about 4.3 km away.

AlamedaOaklandHaywardBerkeleyRichmondSan LeandroCastro ValleyUnion CitySan PabloSan LorenzoHerculesEl CerritoAshlandAlameda
Alameda and nearby cities in area code 510

Carriers with Alameda numbers

459 prefixes are assigned to the Oakland exchange: 25% mobile, 22% VoIP and cable, 53% landline.

CarrierPrefixes
AT&T (Pacific Bell)158
AT&T Mobility42
T-Mobile37
Verizon Wireless36
Metropcs27
Onvoy (Sinch)24
Verizon Business (MCImetro)22
Lumen (Level 3)20

Area codes used in Alameda

Area codePrefixes serving AlamedaMain carriers in this code
510416AT&T (Pacific Bell), AT&T Mobility, T-Mobile
34143Fractel, Onvoy (Sinch), AT&T Mobility

Alameda phone number prefixes

Numbers starting with these first six digits were originally assigned to the Oakland exchange.

Nearby cities in area code 510

Questions

What is the area code for Alameda, CA?
Alameda uses 2 area codes: 510 and 341. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Alameda in?
Alameda is in the Pacific time zone.