Is Area Code 670 a Scam? the Northern Mariana Islands Spam & Safety Guide

Seeing calls from 670 and asking whether area code 670 is a scam? Area code 670 is a genuine U.S. area code serving the Commonwealth of the Northern Mariana Islands (a U.S. territory). The code itself is safe, but scammers routinely spoof 670 numbers so their calls appear local and trustworthy. This guide covers the spam and text risks reported for 670, how to verify unknown callers, and how to block and report them.

✅ Quick Safety Verdict

Is 670 an official US area code? Yes—670 is a valid NANP area code serving the Northern Mariana Islands. Is it safe to answer? Yes if you recognize the number. Because scammers spoof local 670 numbers, treat unexpected calls from unknown 670 numbers with caution and never share personal or financial details with an unverified caller.

Area Code 670 Fast Facts

Detail	Information
Location Covered	the Commonwealth of the Northern Mariana Islands (a U.S. territory)
Time Zone	Chamorro Standard Time (ChST, UTC+10, no DST)
Spoofing Risk Level	High
Official Carrier Info	Assigned under the NANP; the area code for the Northern Mariana Islands, a U.S. territory.
Related Area Codes	None (single code area)

Common Scams Reported From Area Code 670

Neighborhood Spoofing

Scammers forge caller ID so a robocall appears to come from a local 670 number—sometimes matching your own first six digits—to boost the odds you answer. The real caller is often overseas or using an auto-dialer. If a “local” 670 call opens with a recording or a stranger asking for payment or personal data, hang up.

Phishing, Bank Impersonation & Impostor Scams

Fraudsters posing as your bank’s fraud department, the IRS, Social Security, or a utility company call from a 670 number claiming urgent action is required. They pressure you to “verify” account numbers, passwords, or one-time codes, or to pay with gift cards or wire transfer. Real institutions never demand those.

Text Message (SMS) / Smishing Alerts

Smishing texts from 670 numbers pose as package couriers, banks, or toll agencies with a link to “resolve” an issue. The links lead to fake login pages that harvest credentials. Do not tap links in unexpected texts; open the company’s app or type its website manually instead.

How to Identify & Verify Unknown Callers From 670

Let it ring. Legitimate callers leave a voicemail; most scam auto-dialers do not.
Search the number. Paste the full 10-digit number into a search engine or a reverse-lookup site to see if others reported it as spam.
Check the location. A real 670 call should relate to the Northern Mariana Islands. Compare it with our area code 670 reference.
Call back on an official number. If a caller claims to be your bank or a government agency, hang up and dial the number printed on your card or the agency’s official website—never the number that called you.
Never share codes. No legitimate caller needs a one-time passcode, PIN, or password read aloud.

How to Block Calls & Report Scams

Block on iPhone (iOS)

Open the Phone app → Recents → tap the ⓘ next to the 670 number → scroll down and tap Block this Caller. To silence all unknown numbers, go to Settings → Apps → Phone → Silence Unknown Callers.

Block on Android

Open the Phone app → Recents → press and hold the 670 number → tap Block / report spam. In Settings → Spam and Call Screen, enable See caller & spam ID to filter suspected scams automatically.

Report to the FTC & DoNotCall.gov

Register your number free at DoNotCall.gov (or call 1-888-382-1222), then report unwanted or scam calls at ReportFraud.ftc.gov. Reporting the offending 670 number helps regulators trace robocall campaigns. You can also forward scam texts to 7726 (SPAM) to alert your carrier.

Frequently Asked Questions