Area Code 351: Get a Lowell Phone Number

351 · Lowell

What is the area code for Lowell?

The area code for Lowell, Massachusetts is 351, with overlay code 978 sharing the same geographic footprint. The 351 area code is a North American Numbering Plan geographic code assigned in 2001, covering the Northeastern Massachusetts region. It serves approximately 800,000 residents on the Eastern Time (ET) (UTC-5 / UTC-4 DST).

The 351 area code has 93 assigned central-office prefixes (NXX codes, the three digits after the area code) across 43 rate centers, with numbers allocated to roughly 31 carriers.

At 93 of the ~792 usable central-office prefixes, the 351 area code has about 12% of its numbering capacity assigned, and that near-exhaustion is part of why overlay code 978 was added to the region. See how 351 compares in our NXX prefix allocation analysis across 338 US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Where is area code 351? Location and map area

Area code 351 is located in Massachusetts, the United States. Its coverage area centers on Lowell and spans the Northeastern Massachusetts region. If you received a call from a 351 number, the caller's number was assigned in this area — though with number porting and virtual numbers, the person may be calling from anywhere.

The 351 location sits in Eastern Time (ET), so local business hours run roughly 9 a.m.–5 p.m. ET. Neighboring Massachusetts area codes include 339, 413, 508.

All Lowell area codes

Lowell is served by 2 area codes across the metro area. 351 is the 2001 addition; the others were added as overlays or for surrounding suburbs.

• 351 (current page) — Overlay on the same metro, assigned 2001
• 978 — Lowell — assigned 1995

Cities served by the 351 area code

The 351 area code covers 5 major cities and towns across the Northeastern Massachusetts region (MA):

Businesses across Lowell and surrounding cities use 351 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.

351 area code time zone and business hours

The 351 area code is in the Eastern Time (ET) zone (UTC-5 / UTC-4 DST). Standard business hours in 351 run 9 AM to 5 PM ET.

If you're calling into 351 from a different time zone, factor in the offset. For example, an Eastern Time business calling 351 at 9 AM ET reaches Lowell at local time — likely outside standard business hours.

History of the 351 area code

The 351 area code was introduced in 2001 when the North American Numbering Plan was first deployed. As Lowell grew and number demand increased, overlay code 978 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.

• 1995 978 added to serve the same region
• 2001 351 entered service

Is the 351 area code safe? Spam and scam calls

351 is a legitimate geographic area code for Lowell — it is not a scam code or a premium-rate prefix, and a call from a 351 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.

If you get an unexpected 351 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov.

The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real Lowell business will leave a clear voicemail and will not pressure you.

US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 351 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.

Why get a 351 area code number for your business?

Getting a 351 number gives your business three measurable advantages over a toll-free or out-of-area number:

1. Local trust signal. Customers in Lowell recognize 351 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
2. Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
3. Targeted marketing. Businesses serving Lowell and the broader Northeastern Massachusetts can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.

For businesses in Lowell and surrounding cities, top industries that benefit from local 351 presence include Healthcare, Education, and Tech. DialPhone's AI receptionist is available for every 351 number — never miss a call, even after standard business hours.

How to get a 351 area code number

Setting up a 351 business number with DialPhone takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available 351 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
3. Choose your number and configure. Assign your new 351 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a 351 number? Free number porting in 2 to 5 business days with zero service interruption.

New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.

351 area code overlay codes

The Northeastern Massachusetts region is served by multiple overlay area codes:

Area Code	Coverage
351	Primary area code for Northeastern Massachusetts, assigned 2001
978	Overlay — same geography (assigned 1995)

All overlay codes serve the same Lowell region. New subscribers may be assigned any available code; existing numbers retain their original prefix.

AI receptionist for 351 area code businesses

Every DialPhone 351 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.

For businesses in Lowell that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.

All area codes in Massachusetts

Massachusetts has 9 active geographic area codes. The 351 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.

Nearby area codes

Related area codes in Massachusetts and the Eastern Time (ET) region:

• 339 area code — Quincy, Massachusetts
• 413 area code — Springfield, Massachusetts
• 508 area code — Worcester, Massachusetts
• 617 area code — Boston, Massachusetts
• 774 area code — Worcester, Massachusetts
• 781 area code — Lynn, Massachusetts

All Massachusetts area codes → · Browse all US area codes →

More area codes: ← 350 Stockton · 352 Gainesville →

How this page is verified

DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 351 region.

What to know before getting a 351 number

• Number availability is finite. Popular Lowell area codes can be inventory-constrained — request specific vanity patterns early.
• Porting timing varies. Most 351 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
• HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.