🇺🇸 United States · California

Area code 510

Area code 510 is a telephone area code in California, United States, covering Oakland, Fremont, Berkeley, Hayward, San Leandro, Alameda and more. Local time is UTC−8 (UTC−7 in summer). Numbers look like (510) 234-5678, or +1 510 234 5678 from abroad.

State: California
Time zone: Los Angeles UTC−8 (UTC−7 in summer)
Local time now: –
Dial from abroad: +1 510

Places in area code 510

Cities and towns with telephone exchanges in the 510 area code, most exchanges first.

Oakland
Fremont
Berkeley
Hayward
San Leandro
Alameda
Union City
Richmond
Hercules
Castro Valley
Emeryville
Pinole
Crockett

How to dial area code 510

Calling from	You dial
Inside the 510 area	510 234 5678 (10 digits)
Elsewhere in the US & Canada	1 510 234 5678
Any mobile phone, anywhere	+1 510 234 5678
UK, Europe, India and most countries	00 1 510 234 5678
Australia	0011 1 510 234 5678

Other area codes in California

Area code 510: FAQ

Where is area code 510?

Area code 510 is in California, United States and serves Oakland, Fremont, Berkeley, Hayward, San Leandro, Alameda. and other places

What time zone is area code 510 in?

Area code 510 is in the America/Los_Angeles time zone (UTC−8 (UTC−7 in summer)).

How do I call a 510 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 510 and the seven-digit number. Example: +1 510 234 5678.

Is a call from area code 510 a scam?

Area code 510 is a regular North American area code, but caller ID can be spoofed: scammers often show local-looking numbers. Do not call back unknown numbers that ask for money or personal data, and check the number with the phone number validator to see whether it is valid and whether it is a mobile, landline or VoIP number.

Phone number API

Check 510 numbers in your app

numlookupapi checks any phone number worldwide in one request and returns validity, line type, carrier, location and every standard format as JSON.

Read the documentation

100 free requests every month. No credit card required.

GET https://api.numlookupapi.com/v1/validate/+15102345678

{
  "valid": true,
  "number": "12069220880",
  "local_format": "2069220880",
  "international_format": "+12069220880",
  "country_prefix": "+1",
  "country_code": "US",
  "country_name": "United States of America",
  "location": "Seattle",
  "line_type": "landline",
  "e164_format": "+12069220880",
  "national_format": "(206) 922-0880"
}