351 Area Code: Complete Guide to Northeastern Massachusetts Calling

Introduction

The 351 area code serves northeastern Massachusetts as an overlay for the 978 area code, connecting communities from Lowell and Lawrence to Salem and Gloucester along one of New England's most historically significant coastlines. Understanding the 351 area code matters whether you're identifying an incoming call, growing a business in the region, or setting up a local number with genuine Massachusetts roots. This guide covers the cities served, the time zone, the area code's full history, scam call awareness, and exactly how to get a 351 phone number for yourself. Keep reading for everything you need to know about one of Massachusetts's newest and most rapidly growing area codes.

Key Takeaways

• The 351 area code serves northeastern Massachusetts as an overlay for the 978 area code, covering the same geographic territory.
• Major cities include Lowell, Lawrence, Haverhill, Salem, Gloucester, Leominster, and Fitchburg.
• All 351 communities operate in the Eastern Time Zone — EST (UTC-5) in winter and EDT (UTC-4) in summer.
• Area code 351 was introduced in 2011 to address exhausted number supply in the 978 region.
• You can get a 351 phone number through a VoIP service without living in Massachusetts.

What Is the 351 Area Code and Where Is It Located?

The 351 area code covers a geographically diverse stretch of northeastern Massachusetts. It extends from the Merrimack Valley cities of Lowell and Lawrence in the northwest, across the North Shore communities of Salem and Gloucester along the Atlantic coast, and west into the Nashoba Valley cities of Leominster and Fitchburg.

As an overlay for the 978 area code, the 351 region shares its territory with an older prefix rather than following a geographic split. Both codes serve the same communities — callers in Lowell or Salem may have either a 351 or 978 number depending on when their line was assigned. This makes 10-digit dialing mandatory for all local calls across the service area.

Several neighboring area codes surround the 351 territory. Area code 617 and its overlay 857 cover the Boston metro to the southeast. Area code 508 and its overlay 774 handle central and southeastern Massachusetts to the south. The 603 area code serves southern New Hampshire to the north.

351 Area Code Quick Facts

What States Use the 351 Area Code?

The 351 area code is exclusive to Massachusetts. It covers a defined portion of the northeastern part of the state and does not extend into New Hampshire, Rhode Island, or any other neighboring state. All 351 numbers are assigned within the region's established geographic boundaries.

Which Cities Does the 351 Area Code Cover?

The 351 area code spans a wide range of communities — from densely populated urban centers to mid-sized suburban cities and smaller coastal towns. Here are the most prominent communities in the region.

• Lowell — The largest city in the 351 zone and one of the oldest planned industrial cities in the United States, now anchored by UMass Lowell with a strong healthcare, higher education, and technology economy
• Lawrence — Located at the confluence of the Merrimack and Spicket Rivers with a vibrant Latino cultural identity, serving as a commercial and residential hub for the broader Merrimack Valley
• Haverhill — Positioned along the Merrimack River on the New Hampshire border with a mixed economy spanning manufacturing, healthcare, and retail, and a growing commuter population linked to Boston by rail
• Salem — Globally recognized for the Salem Witch Trials of 1692, with a thriving arts scene, a robust food and beverage industry, and a strong downtown commercial district that draws visitors year-round
• Gloucester — One of America's oldest fishing ports, established in 1623, with a deep maritime economy and one of the most celebrated artistic communities on the New England coast
• Leominster — Known as the birthplace of Johnny Appleseed with a strong plastics and manufacturing heritage anchoring the western edge of the 351 zone in the Montachusett region
• Fitchburg — Home to Fitchburg State University with a growing healthcare and education economy on the western frontier of the 351 service area

Other notable communities include Newburyport, Amesbury, Ipswich, Marblehead, Beverly, Peabody, Gardner, and Ayer. All local calls within the region require 10-digit dialing.

351 Area Code Time Zone

Every community in the 351 area code operates in the Eastern Time Zone. During standard time, from early November through mid-March, the region runs on Eastern Standard Time (EST) at UTC-5. From mid-March through early November, clocks shift forward to Eastern Daylight Time (EDT) at UTC-4.

This matters when scheduling calls from other parts of the country. Pacific Coast callers are three hours behind the 351 region — a 9 a.m. California call arrives in Lowell at noon Eastern. Central Time callers are one hour behind. Mountain Time callers are two hours behind.

Massachusetts follows federal daylight saving time rules. Clocks spring forward on the second Sunday in March and fall back on the first Sunday in November each year.

The History of the 351 Area Code

The 351 area code is one of Massachusetts's newer prefixes, created in response to growing demand on the 978 area code. When the North American Numbering Plan launched in 1947, a single area code — 617 — covered all of Massachusetts. As the state's population expanded through the following decades, that single code became strained by surging demand for new numbers.

In 1997, area code 978 was split from 617 to serve northeastern Massachusetts, taking over communities outside the Boston metro — including Lowell, Lawrence, Salem, and Gloucester. The arrangement worked well for over a decade before number exhaustion again became a concern.

How 351 Became the Overlay for 978

By the late 2000s, the explosion of smartphones, tablets, and internet-connected devices had pushed the pool of available 978 numbers toward exhaustion. Rather than dividing the region geographically, regulators chose an overlay approach. In 2011, area code 351 was layered over the entire 978 service area, requiring 10-digit dialing for all local calls across northeastern Massachusetts.

Today, area code 351 and 978 operate side by side across the same geography with equal status. New subscribers in the region receive either prefix, while all existing 978 lines remain unchanged and fully functional. A similar overlay pattern played out with the 330 area code in northeastern Ohio.

351 Area Code Scam Calls: Stay Protected

Like every active U.S. area code, 351 numbers are exploited by scammers who use caller ID spoofing to display a fake local number and increase answer rates. Common scam types in the region include fake utility disconnect notices, student loan fraud targeting the large college-age population, and IRS impersonation schemes.

Here are practical steps to protect yourself:

• Let unknown 351 numbers go to voicemail. Legitimate businesses and government agencies always leave a message rather than hanging up.
• Verify before you act. If a caller claims to represent a bank, utility, or government office, hang up and call the official number directly.
• Use a spam-blocking app. Most U.S. carriers support STIR/SHAKEN call authentication, and dedicated apps offer real-time local spam detection.
• Report suspicious calls to the FTC at reportfraud.ftc.gov or through your wireless carrier's spam-reporting tool.

Scam calls do not reflect on the 351 region itself. The overwhelming majority of calls from the 351 area code originate from legitimate Massachusetts residents, healthcare providers, universities, and businesses every day.

How to Get a 351 Phone Number

Getting a local 351 phone number is fast and straightforward — no Massachusetts address, no carrier store visit, and no long-term commitment required. Modern VoIP platforms and virtual phone apps make the process accessible from any device, anywhere.

Who Benefits Most from a 351 Number?

Healthcare providers, educational institutions, and professional services firms serving Lowell, Lawrence, or Salem clients gain instant credibility with a local 351 prefix. Remote sales teams targeting North Shore businesses or Merrimack Valley manufacturers project genuine Massachusetts presence from day one. Entrepreneurs and small business owners serving northeastern Massachusetts communities build customer trust with a number that local residents immediately recognize.

Why Businesses Choose the 351 Area Code

Northeastern Massachusetts is a region with deep historical roots and a diverse, growing economy. Lowell's healthcare and technology sectors, Salem's booming tourism and hospitality industry, and the Nashoba Valley's manufacturing and education hubs all represent active markets for businesses of every size.

Having a 351 phone number signals to customers that you are local, invested, and part of the community. Research consistently shows that local-looking numbers outperform toll-free and out-of-state numbers in call answer rates — a gap especially pronounced in established New England markets where trust and long-standing reputation influence purchasing decisions.

Virtual area code 351 numbers route calls to any device globally. Distributed teams can project a credible northeastern Massachusetts presence without the overhead of a physical Lowell or Salem office — making 351 one of the most practical and high-value virtual prefixes for any business targeting this market.

For an authoritative overview of how area codes are managed nationally, see the NANPA records on numbering plan administration.

Conclusion

The 351 area code has served northeastern Massachusetts since 2011, connecting Lowell, Lawrence, Haverhill, Salem, Gloucester, and dozens of communities across one of New England's most historically and economically significant regions. It operates in the Eastern Time Zone, functions as an overlay for the 978 area code, and spans a diverse landscape stretching from the Merrimack Valley to the Atlantic coastline. Whether you were identifying an incoming call or exploring how to build a genuine Massachusetts presence, this guide has given you the complete picture.

Getting a 351 phone number has never been more accessible — modern virtual phone platforms activate in minutes with no Massachusetts address and no long-term carrier contract required. A local number builds immediate trust with Lowell businesses, Salem merchants, and communities across the 351 area code region that respond strongly to local identity. You do not need to live in northeastern Massachusetts to project that credibility — a VoIP provider puts any area code 351 number in your hands within minutes. Take the next step and claim your northeastern Massachusetts number today.