Area codes › Guam › 671

Guam Area code 671 - Guam, GU

Area code 671 is a North American Numbering Plan telephone area code serving Telephone area code for Guam in Guam. It was activated in 1997 .

Sources: FCC OpenData, Wikipedia, and community-submitted reports · Updated
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Local time in 671 ?
-
Time zone ?
Eastern (ET)
Activated ?
1997

Who called me from area code 671?

A call from area code 671 most likely originates from Guam or elsewhere in Guam - but caller ID spoofing means the area code alone cannot confirm who called. The only reliable way to identify the caller is to check the full 10-digit number:

  1. Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
  2. Compare it against the recently reported scam numbers in 671 below.
  3. If the call was unwanted, report it to the FTC and use the report form on this page so other 671 residents see it.
Report a scam call from 671 Help other 671-area residents - takes 20 seconds, no signup

Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.

Only the number, category, and description are stored. IP addresses are one-way hashed for rate-limiting and never stored raw. Reports are moderated before publication. Links are not allowed in descriptions.

Should I answer a call from a 671 number? Take the 30-second quiz - 5 questions, verdict + advice

Runs entirely in your browser - nothing is sent or stored.

1. Were you expecting a call today?
2. Do you recognise the specific number (not just the area code)?
3. Have you searched the number online yet?
4. Is it during normal business hours in 671?
5. Are you actively waiting on a business decision (delivery, loan, job, etc.)?

Area codes near 671 (overlay + neighboring)

If a caller ID shows one of these codes, the call is probably still from the Guam area or a nearby region. Click any code to see its own page.

Neighboring regions (codes next door)

These codes cover regions adjacent to 671. Common for calls from nearby cities and across county lines.

Robocall complaints in area code 671

Live FCC data coming soon. Our automated scraper for FCC consumer-complaint statistics is in build. Once live, this section will show a real monthly trend chart of robocall complaints tied to 671 numbers, refreshed on the FCC's monthly release cadence.

Source will be FCC Consumer Complaint Data.

Recently reported scam numbers in 671

No reports for 671 yet. Be the first - use the “Report a scam call” form below to flag a number you've received. Approved reports appear here alongside FCC-recorded complaints.

How to block 671 spam calls (by carrier)

Getting repeated spam calls from 671 numbers around Guam, Guam? You can't legitimately block every 671 call without also missing legitimate ones from Guam, Guam - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.

AT&T

  1. Download the free AT&T ActiveArmor app (iOS + Android).
  2. Sign in with your wireless number.
  3. Enable Fraud Blocking and Suspected Spam Warning.
  4. To block a specific number, tap the call in your history → Block.

Verizon

  1. Download the free Verizon Call Filter app (iOS + Android).
  2. Sign in with your Verizon account.
  3. Turn on Spam Filter.
  4. To block a specific number: My Verizon → Blocks → Add Number.

T-Mobile

  1. Download the free Scam Shield app (iOS + Android).
  2. Enable Scam Block (blocks known scam calls silently).
  3. Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
  4. To block a specific number, dial #662# from your device.

All carriers

  1. Register on the FTC's National Do-Not-Call list.
  2. Report unwanted calls to the FCC at fcc.gov/complaints.
  3. On iPhone: Settings → Phone → Silence Unknown Callers.
  4. On Android: Phone app → ⋮ → Settings → Caller ID & spam.

Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.

History of the 671 area code

The area code 671 is the telephone area code in the North American Numbering Plan (NANP) for the United States territory of Guam. It was created with the beginning of permissive dialing on July 1, 1997, replacing Guam's previous International Telecommunication Union country code 671 at the end of permissive dialing on July 1, 1998.

671 area code FAQ: common questions

What area code is 671?

Area code 671 is a North American Numbering Plan area code that serves Telephone area code for Guam in Guam, primarily including Guam and surrounding communities. It was activated in 1997.

Where does area code 671 cover?

Area code 671 covers the Guam, Guam area.

Is 671 a real area code or a scam?

671 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 671 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.

How do I block 671 spam calls?

You cannot legitimately block an entire area code without also blocking legitimate calls from Guam. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.

What's the overlay area code for 671?

671 does not currently have an overlay area code assigned. New numbers in the region are still issued with the 671 prefix.

Sources

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