Guam +1 671
To call Guam from abroad, dial your exit code (or +), then 1 671, then the local number without its leading 1. In full: +1 671-300-1234.
The country calling code for Guam is +1. A number starting +1 or 001 is a call to or from Guam. From abroad: +1 671-300-1234.
To call Guam from abroad, dial your exit code (or +), then 1, then the local number without its leading 1. The +1 code identifies the country; the following digits identify the line (landline or mobile).
How to call Guam from abroad
011 1 671-300-123400 1 671-300-12340011 1 671-300-1234+1 671-300-1234671-300-1234 is a real-format Guam mobile number (example from the ITU-T numbering plan): replace it with the number you were given, without its leading 1.
Guam area codes
In Guam, landlines usually include an area code after +1 (without its leading 1). Mobiles have no area code.
Number format
(671) 300-1234from abroad+1 671-300-1234(671) 300-1234from abroad+1 671-300-1234Landline numbers in Guam have 10 digits after the country code; mobile numbers have 10 digits and start with 671. The national prefix 1 is only dialled inside the country — drop it after +1.
Calling abroad from Guam
To call another country from Guam, dial the exit code 011 (or + on a mobile), then the country code, then the number. From Guam to the United States, for example: 011 1 201 555 0123.
A Guam number in international format is written +1 …. The + stands for the exit prefix (00 in much of the world, 011 in North America). Switching to international format, drop the leading 1.
Cheapest ways to call Guam
With internet on both ends, apps like WhatsApp, Signal or FaceTime call Guam for free. To reach a number without an app, VoIP services are usually cheaper than your operator’s international rate.
Frequently asked questions
What country has the code +1?
Guam has the country calling code +1.
How do I call Guam from the United States?
Dial 011, then 1, then the local number without its leading 1 — for example 011 671-300-1234.
What does +1 mean?
It is the international dialing code for Guam. The + stands for your exit code (00 in much of the world, 011 in North America).
Is +1 mobile or landline?
The +1 code identifies the country, not the line type; Guam landlines and mobiles share it.
A country code covers a whole nation; the full number depends on the city and operator.
Mobile networks in Guam
3 mobile network operators run their own networks in Guam. Pick the one with the best coverage where you will spend most of your time.
Owned by PTI Pacifica Inc.
Owned by NTT Docomo
Owned by TeleGuam Holdings LLC
- 4G/5G frequency bands used in Guam: 5G, 5G 2500, 5G 26000, 5G 3500, LTE 1700, LTE 700. Most recent smartphones cover them; older or regional models may miss some.
Operators, subscriber counts, network codes and switch-off dates: Wikipedia (lists of mobile network operators, mobile network codes, 2G/3G phase-out, mobile number portability), licensed CC BY-SA 4.0. Figures come from each operator or regulator at the date shown.
Staying connected in Guam
Internet use is high (81 %), so app-to-app calls over Wi-Fi are a safe bet.
Source: World Bank / ITU World Telecommunication indicators (IT.CEL.SETS.P2, IT.NET.USER.ZS, IT.MLT.MAIN.P2), latest available year.
Free and premium numbers in Guam
+1 800-212-3456Free from inside Guam (numbers starting with 8). From abroad these numbers are often unreachable or charged at the international rate.
+1 900-212-3456Surcharged services — ranges starting with 9002–9009. Do not call back an unknown missed call from such a range: the cost is far above a normal call.
Number ranges: ITU-T national numbering plan for Guam via Google libphonenumber.