671 Area Code Map – United States Cities & Zip Codes

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📞 671 Area Code — Quick Reference
📍 LocationHagatna, Guam
🕐 Time ZoneChamorro (UTC+10)
🗓️ StatusActive — Geographic

Area code 671 serves Hagatna and surrounding communities in Guam. Whether you received an unexpected call from this number or you’re trying to figure out where a 671 number is based, this guide covers the exact location, time zone, spam reputation, blocking instructions, and which cities fall under this code.

📍 Where Is the 671 Area Code Located?

The 671 area code is located in Guam, primarily serving Hagatna and the surrounding region. It’s a standard geographic area code under the North American Numbering Plan (NANP). Keep in mind that mobile number portability means someone could carry a 671 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

671 Area Code — Location Details
State/ProvinceGuam (GU)
Major CityHagatna
CountryUnited States (+1)
Time ZoneChamorro (UTC+10)
TypeGeographic — Standard
NANPA StatusActive

🕐 671 Area Code Time Zone

The 671 area code operates in the Chamorro Time Zone (UTC+10). Here’s how it compares to other US time zones:

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 Business hours (good to call)     Early / late hours     Night — do not call
Official Resources: Report Fraud — FTC Do Not Call Registry NANPA Directory
Time ZoneDifference from 671
Eastern TimeSame time
Central Time-1 hour
Mountain Time-2 hours
Pacific Time-3 hours
💡 Calling Tip: Reach someone in the 671 area between 10 AM – 4 PM their local time for the best chance of an answer. Calls outside those hours are more likely to be screened or ignored.

🛡️ Is 671 Area Code Spam or Scam?

Is a 671 call spam? Not necessarily — 671 is a legitimate area code serving Hagatna and surrounding areas. That said, scammers routinely spoof 671 numbers to make their calls look local. The general rule: if you don’t recognize the number and they don’t leave a voicemail, it’s probably junk.

⚠️ Red Flag: If a 671 caller demands immediate payment via gift cards, wire transfer, or crypto — hang up. No legitimate organization uses these methods. Verify by calling the company’s official number directly.

How to verify: Don’t call back the number — look up the official number for whatever organization the caller claimed to represent and call that instead. Google the full 10-digit number in quotes to check if others have reported it as spam.

📵 How to Block 671 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 671 spam number
  3. Scroll down → “Block this Caller”
  4. Silence all unknowns: Settings → Phone → Silence Unknown Callers → ON

Block on Android

  1. Open Phone → find the 671 number
  2. Tap ⋮ menu → “Block number”
  3. For broader blocking: Settings → Blocked numbers → Unknown toggle ON

Report Spam

  1. Forward spam texts to 7726 (SPAM)
  2. Report at reportfraud.ftc.gov
  3. Register at donotcall.gov or call 1-888-382-1222

🔍 Who Called from 671? Reverse Lookup

  1. Google the full 10-digit number in quotes — catches ~70% of unknown callers
  2. Check Whitepages.com or Truecaller.com
  3. Search 800notes.com for community reports
  4. No voicemail left? Almost certainly spam — legitimate callers leave messages
⚠️ One-Ring Scam: If a 671 number rings once and hangs up, do NOT call back. This scam connects you to a premium-rate line that charges your bill.

🔗 Nearby Area Codes

CodeLocationTime Zone

❓ 671 Area Code — FAQ

What state is 671 area code in?
The 671 area code is in Guam, serving Hagatna and surrounding areas.
What city does 671 cover?
671 primarily covers Hagatna and nearby communities in Guam.
Is 671 toll-free?
No. 671 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 671?
Chamorro (UTC+10).
Is 671 a scam?
671 is legitimate — it serves real people in Hagatna. But scammers may spoof 671 numbers. Verify suspicious callers independently.
Why do I keep getting 671 calls?
Repeated 671 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 671 number remotely?
Yes — VoIP services like Google Voice offer 671 numbers regardless of where you live.
Is 671 cell or landline?
671 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 671 calls?
iPhone: Settings → Phone → Silence Unknown Callers. Android: Phone → Settings → Blocked numbers. For area-code blocking, use Truecaller or RoboKiller.

🔗 Related Area Code Guides

    Updated April 2026 · Data from NANPA & FCC · areacodess.org/