Area code
Area code 351 — Massachusetts
Massachusetts · in service since May 2, 2001
Area code 351 covers parts of Massachusetts. It is an overlay: 978 serves the same area, so neighbors can have different area codes.
Overlay, same area: 978
Local time in Massachusetts
Spam reports from Sep 23 – Oct 22, 2026
Average #339 of 461 codes
190 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneEastern Time
- Local calls10 digits
- Prefixes110 assigned
- Runs out100+ years
- Unwanted call?Block & report
Spam call reports about 351 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 17 |
| Sep 14 | 51 |
| Sep 21 | 53 |
| Sep 28 | 53 |
| Oct 5 | 38 |
| Oct 12 | 22 |
| Oct 19 (4 days) | 39 |
Compared with all codes
- Robocalls
- 81%all codes 75%
- Callers with the same code
- 3%all codes 35%
- Rank by complaints
- #339of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 364 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 126 46% | |
| Calls pretending to be government, businesses, or family and friends | 17 6% | |
| Dropped call or no message | 13 5% | |
| Energy, solar, & utilities | 4 1% | |
| Home improvement & cleaning | 2 1% | |
| Medical & prescriptions | 2 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Massachusetts | 45 16% | |
| California | 28 10% | |
| Florida | 20 7% | |
| Texas | 16 6% | |
| New Jersey | 15 5% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 351 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| ACTON | — | — | 7 |
| LOWELL | Lowell | Middlesex County | 6 |
| DANVERS | Danvers | Essex County | 4 |
| GEORGETOWN | — | — | 4 |
| HAVERHILL | Haverhill | Essex County | 4 |
| LAWRENCE | Lawrence | Essex County | 4 |
| ASHBY | — | — | 3 |
| GLOUCESTER | Gloucester | Essex County | 3 |
| HARVARD | — | — | 3 |
| IPSWICH | Ipswich | Essex County | 3 |
Plus 33 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Massachusetts
- Assigned by NANPA
- May 3, 2000
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-234
Source: NANPA, NPA database of Oct 24, 2026.
Is 351 running out of numbers?
Last dated forecast (October 2025, not current): 2157.
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 351 prefixes
The five largest of 24 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Onvoy, LLC | 28 25% | |
| Fractel, LLC | 11 10% | |
| Omnipoint Miami E License, LLC | 11 10% | |
| Multiple Ocn Listing | 9 8% | |
| Ton80 Communications, LLC | 7 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 351
What area code is 351?
A Massachusetts area code, in service since May 2, 2001.
Where is 351 area code, and what time zone is it in?
Massachusetts; Eastern Time.
Why am I getting spam calls from 351?
190 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).