🇺🇸 United States · California

Area code 657

Area code 657 is a telephone area code in California, United States. Local time is UTC−8 (UTC−7 in summer). Numbers look like (657) 234-5678, or +1 657 234 5678 from abroad.

State: California
Time zone: Los Angeles UTC−8 (UTC−7 in summer)
Local time now: –
Dial from abroad: +1 657

How to dial area code 657

Calling from	You dial
Inside the 657 area	657 234 5678 (10 digits)
Elsewhere in the US & Canada	1 657 234 5678
Any mobile phone, anywhere	+1 657 234 5678
UK, Europe, India and most countries	00 1 657 234 5678
Australia	0011 1 657 234 5678

Other area codes in California

Area code 657: FAQ

Where is area code 657?

Area code 657 is in California, United States.

What time zone is area code 657 in?

Area code 657 is in the America/Los_Angeles time zone (UTC−8 (UTC−7 in summer)).

How do I call a 657 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 657 and the seven-digit number. Example: +1 657 234 5678.

Is a call from area code 657 a scam?

Area code 657 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 657 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/+16572345678

{
  "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"
}