Country Calling Codes HomeInternational calling from Costa Rica to Guam made easy Perform a New Calling Codes Search Need help with Costa Rica or Guam calling codes? Click here.
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Country flag of Costa Rica Country flag of Guam

How to call a Guamanian mobile phone from Costa Rica.

Dial the following international mobile code:

00 + 1 + 671 + The Number

* Do not dial the plus (+) symbols

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How to make your international call How to call a Guam mobile phone:

00 - Costa Rica exit code to dial first when calling international
1 - Guam country code must be dialed next
671 - Guam mobile code must be dialed next
00 + 1 + 671 + Local Number - Overall dialing format

World Time Zones World Times:

The time in Costa Rica is now 05:26:19 AM (05:26:19 AM)
The time in Guam is now 21:26:19 PM (09:26:19 PM)

Call a Guam cell phone. More Ways to Call a Guam mobile phone:

Call a Guam cell phone. Tips for calling a cell phone in Guam:

  • To call a Guamanian cell phone from a land line, simply follow the mobile country code dialing instructions above to place your call.
  • To call a Guamanian cell phone from your cell phone, you may need to first use the + (plus) sign prior to entering the Guam mobile code and telephone number.
  • If you are calling Guam from your cell phone, you may incur additional charges or fees from your mobile carrier. We recommend trying out a service, such as SpeedyPin Calling Cards - From 0.4¢ per Minute


We hope that the Country Calling Codes mobile country codes guide has helped you call a cell phone in Guam. Why not share our Guam phone book with your friends and bookmark this page and tell a friend about this site for the next time they need to search for mobile area codes or call a cellular phone in another country.

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