Area Code 351 – Zip Codes, Time Zone & Massachusetts Map

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📞 351 Area Code — Quick Reference
📍 LocationLowell, Massachusetts
🕐 Time ZoneEastern (UTC-5/UTC-4)
🗓️ StatusActive — Geographic

Area code 351 serves Lowell and surrounding communities in Massachusetts. Whether you received an unexpected call from this number or you’re trying to figure out where a 351 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 351 Area Code Located?

The 351 area code is located in Massachusetts, primarily serving Lowell 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 351 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

351 Area Code — Location Details
State/ProvinceMassachusetts (MA)
Major CityLowell
CountryUnited States (+1)
Time ZoneEastern (UTC-5/UTC-4)
TypeGeographic — Standard
NANPA StatusActive

🕐 351 Area Code Time Zone

The 351 area code operates in the Eastern Time Zone (UTC-5/UTC-4). Here’s how it compares to other US time zones:

Time ZoneDifference from 351
Eastern TimeSame time
Central Time-1 hour
Mountain Time-2 hours
Pacific Time-3 hours
💡 Calling Tip: Reach someone in the 351 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 351 Area Code Spam or Scam?

Is a 351 call spam? Not necessarily — 351 is a legitimate area code serving Lowell and surrounding areas. That said, scammers routinely spoof 351 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 351 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 351 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 351 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 351 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 351? 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 351 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
617Boston, MassachusettsEastern
978Lowell, MassachusettsEastern
508Worcester, MassachusettsEastern
857Boston, MassachusettsEastern
781Lynn, MassachusettsEastern

❓ 351 Area Code — FAQ

What state is 351 area code in?
The 351 area code is in Massachusetts, serving Lowell and surrounding areas.
What city does 351 cover?
351 primarily covers Lowell and nearby communities in Massachusetts.
Is 351 toll-free?
No. 351 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 351?
Eastern (UTC-5/UTC-4).
Is 351 a scam?
351 is legitimate — it serves real people in Lowell. But scammers may spoof 351 numbers. Verify suspicious callers independently.
Why do I keep getting 351 calls?
Repeated 351 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 351 number remotely?
Yes — VoIP services like Google Voice offer 351 numbers regardless of where you live.
Is 351 cell or landline?
351 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 351 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/