Country calling code
+1 Guam country code
Guam’s international calling code is +1. To call a Guam number from another country, dial your exit code, then 1, then the local number without the leading 1.
- Calling code
- +1
- ISO 3166 code
- GU · 316
- Exit code (calling out)
- 011
- Trunk prefix (domestic)
- 1
- Number length
- 10 digits
- Time zones
- Guam
- Local time
- —
Number formats and examples are generated from libphonenumber-js numbering-plan metadata. They describe numbering rules, not a verified active subscriber or a phone’s current location. For an individual number, try the free format lookup.
How to call Guam
| Calling from | Dial |
|---|---|
| A mobile phone, anywhere | +1 671 300 1234 |
| United States & Canada | 011 1 671 300 1234 |
| UK, Europe & most countries | 00 1 671 300 1234 |
| Australia | 0011 1 671 300 1234 |
| Inside Guam | (671) 300-1234 |
Inside Guam, numbers are written with the trunk prefix 1 (for example (671) 300-1234). Drop that 1 when you dial from abroad.
Guam phone number format
A sample mobile number in Guam is written +1 671 300 1234 internationally, (671) 300-1234 locally, and +16713001234 in the E.164 format that apps and websites store. Numbers are 10 digits long after the country code.
Not sure where a number is from? Paste it into our free phone number lookup to see the country, line type and correct format.
Calling abroad from Guam
To call another country from a Guam landline, start with the exit code 011, then the destination country code. On a mobile phone, holding 0 to type + works everywhere and replaces the exit code.
Other places that use +1
The +1 code is shared by 25 countries and territories. The first digits after the code identify each one: Antigua & Barbuda, Anguilla, American Samoa, Barbados, Bermuda, Bahamas, Canada, Dominica, Dominican Republic, Grenada, Jamaica, St. Kitts & Nevis, Cayman Islands, St. Lucia, Northern Mariana Islands, Montserrat, Puerto Rico, Sint Maarten, Turks & Caicos Islands, Trinidad & Tobago, United States, St. Vincent & Grenadines, British Virgin Islands, U.S. Virgin Islands.
Missed call from +1?
If you don’t know anyone in Guam, be careful with short missed calls from international numbers. “One-ring” scams hope you call back a premium-rate line. Don’t return the call, don’t share codes sent by SMS, and block the number if it keeps calling. A genuine contact will usually leave a message or text.
Frequently asked questions
Which country uses the +1 code?
+1 is the calling code of Guam. It is shared with Antigua & Barbuda, Anguilla, American Samoa, Barbados, Bermuda, Bahamas, Canada, Dominica and others; the digits after +1 tell them apart.
How do I call Guam from the United States?
Dial 011 (the US exit code), then 1, then the local number without the leading 1. From a mobile phone you can simply type +1 671 300 1234.
How many digits are in a Guam phone number?
National numbers in Guam are 10 digits long after the +1 country code. A typical mobile number looks like +1 671 300 1234.
Can I find the location of a +1 number?
Not from the number alone. Enter the number in AI Family Locator and send a location request. Live GPS location appears only after the owner installs the app and approves sharing. A number lookup shows only numbering details, not a current location.