What Is Area Code 671? (Dededo, Guam)

Area code 671 covers Dededo and surrounding areas in Guam. It was added to the North American Numbering Plan in 1997. For the full picture, see all Guam area codes.

Cities Served by Area Code 671

Area code 671 serves Island of Guam (all 19 municipalities), including the following cities and communities:

• Dededo
• Tamuning
• Yigo
• Mangilao
• Hagåtña
• Barrigada
• Sinajana
• Chalan Pago-Ordot

Nearby area codes covering the same broader region include: 670.

How to Get a 671 Phone Number

There are three ways to get a phone number with the 671 area code, each suited to a different need:

1. Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 671 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 671 inventory.
2. Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 671 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
3. Port an existing 671 number. If you already have a 671 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Guam sometimes can’t accept inbound ports of 671 numbers due to 911 routing rules.

Looking for a 671 number? 212areacode.com offers premium 671 numbers for Dededo, Guam — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 671 numbers →

Frequently Asked Questions

Is the 671 area code still in use?
Yes. 671 is actively assigned to new phone lines in Island of Guam (all 19 municipalities).

Can I get a 671 number if I don't live in Guam?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 671 number from anywhere in the world. The number routes to whatever device or carrier you specify.

Is 671 a scam area code?
No. 671 is a legitimate, active area code for Island of Guam (all 19 municipalities). Like any area code, scammers occasionally spoof 671 caller IDs, but the code itself is heavily used by real Guam businesses, government offices, and residents.

What territory does area code 671 serve?
Area code 671 is the sole area code for Guam, a U.S. unincorporated territory in the western Pacific Ocean. It covers all 19 municipalities on the island.

When did area code 671 go into service?
Permissive dialing under area code 671 began on July 1, 1997. It replaced Guam’s prior ITU international country code (+671) when mandatory NANP dialing took effect on July 1, 1998.

Does Guam observe Daylight Saving Time?
No. Guam operates on Chamorro Standard Time (UTC+10) year-round and does not observe Daylight Saving Time.

Why did Guam switch to ten-digit dialing?
On October 24, 2021, area code 671 transitioned to mandatory ten-digit dialing because the 988 prefix was in use locally and 988 had been designated nationwide as the Suicide and Crisis Lifeline, creating a conflict with seven-digit dialing.

Related Reading

• How Many Area Codes Are In the US?
• Who Invented Area Codes?
• Why Use Area Codes For Local Calls?
• What States Have the Most Area Codes?

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