How Do I Call an International Number from Guam?

• International Call Prefix to call from Guam: 11

To call an international phone number from Guam, simply:
• 1. Dial the international access code for Guam - 11
• 2. Dial country code of the person: Click here for international country codes
• 3. Dial the phone number in, excluding the 0 at the beginning

To make an international call to Landline Phone Number from Guam, the dialling format should be:
11 - Country Code - Area Code - Land Phone Number without the 0 at the front

To make a Call or Send Text Internationally from Guam, the dialling format should be:
11 - Country Code - Mobile Phone Number excluding the 0 at the beginning

How to call a number in Guam from Singapore?

To call a telephone number in Guam from Singapore, simply:
1. Dial International Access Code for Singapore: 65
2. Dial country code for Guam: 1-671
3. Dial the phone number in Guam, excluding the 0 at the beginning of the number

How to call a number in Guam from Sri Lanka?

To call a telephone number in Guam from Sri Lanka, simply:
1. Dial International Access Code for Sri Lanka: 94
2. Dial country code for Guam: 1-671
3. Dial the phone number in Guam, excluding the 0 at the beginning of the number