United States · Massachusetts
781 Area Code
Area code 781 serves Waltham and surrounding communities in Massachusetts, United States. Numbers that start with 781 follow Eastern time. Enter the full number in the lookup panel to see the carrier, line type and scam risk before you call back.
- Location
- Waltham, MA
- Local time
- —Eastern · GMT-4
- Dialing
- +1 781 XXX XXXX
- LineMobile
- CarrierT-Mobile USA
- LocationSan Francisco, CA
- Caller nameNot published
- RiskLow risk· 3 reports
Cities and communities in 781
781 is centred on Waltham. It is the only area code for this region, so every local number begins with 781.
A geographic area code tells you where a number was issued, not where the phone is today. People keep their numbers when they move, and businesses buy local numbers to look nearby. Use it as a starting point, then confirm with the carrier and line type from a lookup.
Most reported 781 numbers
No reports yet for 781 numbers. Be the first to flag a number that called you.
Got a call from a 781 number that is not listed? Add it on the Who Called Me page. Reports show up here and on every lookup within minutes.
Common scam calls from 781 numbers
Scam callers rotate through local-looking numbers because people answer them more often. These are the patterns reported most often across North America and seen with 781 caller IDs.
- "the IRS or Social Security" threats. A recorded voice claims a warrant or unpaid tax bill and demands payment by gift card or wire. Government agencies do not call from 781 numbers to demand instant payment.
- Bank fraud alerts. A caller pretends to be the fraud desk of a bank with branches in Waltham and asks you to "verify" a card number or one-time code. Hang up and call the number on the back of your card.
- Local-looking spoofed numbers. Scammers spoof 781 numbers so the call looks local. A lookup that shows a VoIP line, or a carrier that does not serve Massachusetts, is the giveaway.
- Delivery and utility texts. Texts about a missed package or an overdue Waltham utility bill link to a fake payment page. Trace the sending number before tapping anything.
How to check a 781 number
- Enter the full ten-digit number in the panel above. The area code is already filled in.
- Read the line type and carrier. A mobile or landline from a carrier that serves Massachusetts is usually genuine; a VoIP line spun up yesterday is not.
- Check the risk level and community reports. If others have flagged the number, do not call back.
- Still unsure? Unlock risk details or the owner report for the number.
Frequently asked questions
Where is area code 781?
Area code 781 is in Massachusetts, United States. Its largest city is Waltham.
What time zone is area code 781 in?
781 follows Eastern time (GMT-4). Check the live local time above before returning a call.
Is a call from 781 a scam?
Not by itself. 781 is a normal geographic area code, but scammers spoof local numbers. Run the free lookup on the exact number: a VoIP line, a carrier outside Massachusetts or existing community reports are the warning signs.