Phone Code Genius .com

Dialing telephone calls from Singapore to Guam

001
1
671
XXX-XXXX

Step-by-step

001
This IDD (International Direct Dial) prefix tells the phone system in Singapore that you are dialing an international number.
1
Region code that includes Guam.
671
Area code for Guam.
XXX-XXXX
All local telephone numbers in Guam are 7 digits long.

Notes