Country calling code

Guam country code: +1 671

Q: What is the country code of Guam?

The country calling code of Guam is +1 671. Guam is part of the North American Numbering Plan, so its numbers start with +1 followed by the area code 671.

Q: What is the exit code for international calls from Guam?

To call another country from Guam, dial 011, then the other country's code and number. On mobile phones you can always use + instead.

To call Guam from another country, dial your exit code, then 1 671 (country code 1 and area code 671), then the seven-digit local number. A Guam mobile number dialled from abroad looks like +1 671-300-1234.

Country code: +1 671
Exit code (IDD): 011
Trunk prefix: 1
Mobile number length: 10 digits
ISO country code: GU
Time zone: UTC+10
Capital: Hagatna
Currency: USD

How to call Guam

1
Dial the exit code of the country you are in. 011 in the US and Canada, 00 in the UK and most of Europe, 0011 in Australia. On a mobile phone, press and hold 0 to type + instead.
2
Dial 1, the country code of Guam, followed by the area code 671.
3
Dial the local number without the leading 1. Numbers written for callers inside Guam start with the trunk prefix 1; it is dropped when you call from abroad.

Calling from	You dial
Inside Guam	(671) 300-1234
Any mobile phone	+1 671-300-1234
United States or Canada	011 1 671-300-1234
UK, Germany, India and most countries	00 1 671-300-1234
Australia	0011 1 671-300-1234
Japan	010 1 671-300-1234

Example with the Guam sample number +16713001234.

Calling abroad from Guam

Dial the exit code 011, then the country code and the number. To call the US from Guam: 011 1 + area code + number.

Guam phone number format

Example numbers for each number type, written the way they are dialled inside Guam and from abroad. The length counts the digits after the country code.

Type	National format	International format	E.164	Digits
Mobile	(671) 300-1234	+1 671-300-1234	+16713001234	10
Landline	(671) 300-1234	+1 671-300-1234	+16713001234	10
Toll-free	(800) 212-3456	+1 800-212-3456	+18002123456	10
Premium rate	(900) 212-3456	+1 900-212-3456	+19002123456	10
Personal number	(500) 234-5678	+1 500-234-5678	+15002345678	10

Mobile networks in Guam

The first digits of a number show which network the number range was assigned to. Numbers can be ported to another network later.

All 18 prefixes →

GTA

10 prefixes

1671480167148216714831671485167148616714871671488167148916718641671867

Choice Phone

4 prefixes

1671868167187167188167189

i CAN_GSM

3 prefixes

167183167184167185

PTI PACIFICA

1 prefixes

167174

Guam country code: FAQ

What is the country code of Guam?

The country calling code of Guam is +1 671. Guam is part of the North American Numbering Plan, so its numbers start with +1 followed by the area code 671.

How do I call Guam from abroad?

Dial your exit code (011 from the US and Canada, 00 from most of Europe, or simply + on a mobile phone), then 1, then the local number without the leading 1. Example: +1 671-300-1234.

What is the exit code for international calls from Guam?

To call another country from Guam, dial 011, then the other country's code and number. On mobile phones you can always use + instead.

How many digits does a Guam mobile number have?

Mobile numbers in Guam have 10 digits after the country code (without the trunk prefix), for example +1 671-300-1234.

Which mobile networks operate in Guam?

Mobile number ranges in Guam are assigned to GTA, Choice Phone, i CAN_GSM, PTI PACIFICA and others. Because numbers can be ported between networks, the prefix shows the network a number was originally issued to. Use the carrier lookup to check a specific number.

How can I check if a Guam phone number is valid?

Enter the number in the checker on this page. It checks the length and number ranges of Guam offline. To verify numbers in bulk or from your own software, use the numlookupapi phone validation API.

Phone number API

Validate numbers like this 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.

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GET https://api.numlookupapi.com/v1/validate/+16713001234

{
  "valid": true,
  "international_format": "+16713001234",
  "country_prefix": "+1",
  "country_code": "GU",
  "line_type": "mobile",
  "carrier": "…",
  "e164_format": "+16713001234",
  "national_format": "(671) 300-1234"
}