The 671 area code is the telephone area code for Guam, a United States territory located in the Western Pacific Ocean. Because Guam is part of the North American Numbering Plan (NANP), calling a 671 number from the U.S. is treated like a domestic long-distance call, not an international one.
This article provides a complete guide to the 671 area code, explaining its location, the correct way to dial it, its unique time zone, and what you should know about potential calling costs.
Where is the 671 Area Code Located?
The 671 area code is exclusively assigned to the island of Guam, a U.S. territory in Micronesia. It is the westernmost territory of the United States and plays a significant role as a strategic hub in the Pacific.
- Capital City: Hagåtña
- Largest Village: Dededo
When you see the 671 area code, you can be certain the number is registered to a phone service based in Guam.
How to Call a Number in Guam (Using the 671 Area Code)
Dialing a number in Guam from the United States or Canada is straightforward and does not require any international codes. You dial it the same way you would call another state.
Follow this simple format:
- Dial the U.S. country code: Dial 1.
- Dial the area code: Dial 671.
- Dial the seven-digit local number.
The complete dialing sequence will look like this: 1 + 671 + [Seven-Digit Phone Number]
Important: You do not need to use the 011 international exit code, as Guam is part of the U.S. numbering plan.
Understanding the Time Zone for Area Code 671
One of the most critical things to know before calling Guam is its time zone. Guam operates on Chamorro Standard Time (ChST), which is 10 hours ahead of Coordinated Universal Time (UTC+10).
Guam does not observe daylight saving time. This creates a very significant time difference with the mainland United States.
- Eastern Time (ET): Guam is 15 hours ahead of EST and 14 hours ahead of EDT.
- Pacific Time (PT): Guam is 18 hours ahead of PST and 17 hours ahead of PDT.
For example, when it is 12:00 PM (Noon) on Monday in New York (EDT), it is already 2:00 AM on Tuesday in Guam. Always check the current time in Guam before placing a call to avoid waking someone up in the middle of the night.
Are Calls to the 671 Area Code Considered International?
This is a common point of confusion. While dialing a 671 number is done domestically, the cost can vary depending on your phone service provider.
- Dialing: The call is considered domestic long-distance, not international.
- Billing: Some phone plans, especially from major mobile carriers, include calls to U.S. territories like Guam in their nationwide flat-rate or unlimited plans. However, other providers, particularly budget carriers or landline services, may charge a higher rate than a standard state-to-state call.
To avoid unexpected charges, it is always best to check with your specific phone provider about their rates for calling Guam before you dial.
Frequently Asked Questions
Is 671 an area code in the USA?
Yes, the 671 area code serves the United States territory of Guam. It is part of the U.S. telecommunications system.
Do I need a country code to call Guam?
No. Because Guam is part of the North American Numbering Plan, you only need to dial 1 before the area code, just as you would for any other U.S. state or territory.
Is the 671 area code a scam?
No, 671 is the legitimate and official area code for Guam. However, like any valid area code, it can be “spoofed” by scammers who fake their caller ID. You should always be cautious when receiving unsolicited calls from any number you don’t recognize.
What are the main villages in Guam?
Besides the capital of Hagåtña, other major population centers in Guam include Dededo, Tamuning, Mangilao, and Barrigada.
Conclusion
In summary, the 671 area code is the telephone code for the U.S. territory of Guam. Calling this area code from the U.S. is as simple as making a domestic long-distance call (1-671-xxx-xxxx). The most important factors to remember are the significant time difference due to the Chamorro Standard Time zone and the wisdom of checking with your phone carrier to understand any potential long-distance costs.
