🇬🇺 Guam

Area code 671

Area code 671 is a telephone area code for Guam within the North American Numbering Plan, covering Tamuning. Local time is UTC+10. Numbers look like (671) 234-5678, or +1 671 234 5678 from abroad.

Country: Guam
Time zone: Guam UTC+10
Local time now: –
Dial from abroad: +1 671

Places in area code 671

Cities and towns with telephone exchanges in the 671 area code, most exchanges first.

Tamuning

How to dial area code 671

Calling from	You dial
Inside the 671 area	671 234 5678 (10 digits)
Elsewhere in the US & Canada	1 671 234 5678
Any mobile phone, anywhere	+1 671 234 5678
UK, Europe, India and most countries	00 1 671 234 5678
Australia	0011 1 671 234 5678

Area code 671: FAQ

Where is area code 671?

Area code 671 is in Guam and serves Tamuning.

What time zone is area code 671 in?

Area code 671 is in the Pacific/Guam time zone: UTC+10.

How do I call a 671 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 671 and the seven-digit number. Example: +1 671 234 5678.

Is a call from area code 671 a scam?

Area code 671 is a regular Guam 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 671 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/+16712345678

{
  "valid": true,
  "number": "16712345678",
  "local_format": "6712345678",
  "international_format": "+16712345678",
  "country_prefix": "+1",
  "country_code": "GU",
  "country_name": "Guam",
  "location": "Guam",
  "line_type": "…",
  "e164_format": "+16712345678",
  "national_format": "(671) 234-5678"
}