351 Area Code: Acton, Massachusetts
Area code 351 serves Acton, Lowell and Georgetown, Massachusetts in the Eastern time zone, in service since 2001. Consumers have filed 1,150 unwanted-call complaints against 914 different 351 numbers, 153 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 351 at a glance
- State
- Massachusetts
- Main cities
- Acton, Lowell, Georgetown, Lawrence, Danvers, Haverhill + 36 more
- Counties
- Essex County, Middlesex County, Worcester County, Franklin County
- Local time
- —Eastern
- In service since
- May 2, 2001
- Overlay of
- 978
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 44 rate centers, 92 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Reported 351 numbers
No single 351 number has enough complaints yet for a full report page, so none are listed. Look up the exact number that called you: the lookup works on every US number, whether or not it has complaint history.
What calls from 351 numbers are about
594 FTC Do Not Call complaints about 351 numbers since Jul 24. The most common named subject is debt-relief pitches, at 45% of complaints (94% of those were recorded messages). Overall, 84% of callers who answered said the call was a robocall.
FTC complaint subjects
- Debt reduction26745%
- Other / unspecified19633%
- Impostor (government, business, family)488%
- Dropped call / no message346%
- No subject given325%
- Energy, solar & utilities61%
- Medical & prescriptions31%
FCC complaints by call type, last 2 years
- Prerecorded Voice3651%
- Live Voice2535%
- Text Message1014%
14% of recent FCC complaints about 351 numbers are about text messages, not calls.
When 351 spam calls come in
31% of complaints that give a call time describe calls between 10am and 1pm. 89% came Monday to Friday, most on Thursdays. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
175 FTC complaints about 351 numbers in the last four weeks, down 14% on the four weeks before. FCC complaints about 351 numbers peaked in 2017 (84); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
Only 16% of the FTC complaints about 351 numbers came from Massachusetts residents; the most came from Florida, California and Texas. 351 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Where complainants live
- Massachusetts9616%
- Florida539%
- California468%
- Texas407%
- Michigan356%
Likely campaigns using 351 numbers
Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.
Busiest 351 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
Carriers operating in 351
NANPA has assigned 92 351 prefixes (NPA-NXX central-office codes) across 44 rate centers: 24% to wireless carriers, 73% to landline and VoIP operators; 98% are pooled blocks shared by several carriers. 1 prefix was assigned in the last 12 months (newest 2026-05-04). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 28(30%) | 25 | 2023-08-23 |
| Fractel, LLC | Competitive / VoIP (CLEC) | 11(12%) | 11 | 2021-10-22 |
| Omnipoint Miami E License, LLC | Wireless | 11(12%) | 7 | 2023-01-09 |
| Ton80 Communications, LLC | Competitive / VoIP (CLEC) | 7(8%) | 7 | 2022-02-17 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 5(5%) | 5 | 2021-03-17 |
| Verizon Wireless (Cellco Partnership) | Wireless | 4(4%) | 3 | 2024-05-28 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 3(3%) | 3 | 2022-01-27 |
| Metro by T-Mobile (MetroPCS) | Wireless | 3(3%) | 3 | 2022-02-11 |
| Peerless Network | Competitive / VoIP (CLEC) | 3(3%) | 3 | 2013-01-08 |
| Comcast (Xfinity Voice) | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2021-08-18 |
| Commio, LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2023-09-26 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 2(2%) | 2 | 2020-06-09 |
Largest rate centers (exchanges) by prefixes: Acton (7), Lowell (5), Danvers (4), Georgetown (4), Haverhill (4), Lawrence (4), Ashby (3), Gloucester (3), Harvard (3), Ipswich (3). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 351 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 351 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in Massachusetts
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: Massachusetts Attorney General.
- Massachusetts is one of the states that maintains its own Do Not Call registry alongside the federal National Do Not Call Registry, so telemarketers calling Massachusetts numbers are expected to check both lists. Registering on the federal list at donotcall.gov is free and never expires; the state list is administered separately and may have its own registration process and renewal period.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 351: questions answered from the data
Where is area code 351?
Area code 351 serves Acton, Lowell and Georgetown, Massachusetts, covering Essex County, Middlesex County and Worcester County and 1 more county. It has been in service since May 2, 2001.
What time zone is area code 351 in?
Area code 351 is in the Eastern time zone (UTC−5, or UTC−4 during daylight saving time). The current local time is shown at the top of this page.
What are calls from 351 numbers usually about?
Since Jul 24, consumers filed 594 FTC Do Not Call complaints about 351 numbers. The most common named subject was debt-relief pitches: 45% of complaints, 94% of them recorded messages. Across all subjects, 84% of callers who answered the question said the call was a robocall.
When do 351 spam calls happen?
31% of the complaints that give a call time describe calls between 10am and 1pm, and 89% came on weekdays, most often on Thursday. Times are as consumers reported them.
Are calls from 351 numbers really local?
Not necessarily. Only 16% of the FTC complaints about 351 numbers came from Massachusetts residents; the most came from Florida, California and Texas. 351 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Are 351 robocalls increasing?
In the four weeks to Oct 15, consumers filed 175 FTC complaints about 351 numbers, 14% fewer than the four weeks before.
How do I report a 351 scam call in Massachusetts?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In Massachusetts, the Massachusetts Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.