978 Area Code: The Merrimack Valley & North Shore

The 978 area code is the sound of the top of Massachusetts — not the Boston skyline to the south, but the band of old mill cities, fishing ports and hill towns that fills the northern edge of the state.

It rings in the red-brick textile mills of Lowell and Lawrence along the Merrimack River, the leather and shoe history of Haverhill, the working waterfront of Gloucester out on Cape Ann, and the north-central factory towns of Fitchburg and Leominster.

If a Chelmsford contractor, an Andover medical practice or a Newburyport shop set up a phone line any time since the late 1990s, there is a strong chance it opens with 978.

Because 978 split from the older Massachusetts code and now shares its ground with a newer overlay, it turns up in two very different searches: people who just got a 978 number and want to know where it comes from, and people asking whether an unfamiliar 978 call is safe to answer.

This guide covers both — the cities and communities that fill northeastern and north-central Massachusetts on 978, how it fits with the 351 overlay, why the region sits firmly in Eastern Time, what the spoofed-call risk really is, and how to activate a 978 virtual number for a business in minutes.

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The 978 area code is a telephone area code serving north-central and most of northeastern Massachusetts. It was created on September 1, 1997, when the 508 area code — which had covered much of the state outside Boston since 1988 — was split to relieve number exhaustion.

A permissive dialing period let the old and new codes work side by side until February 1, 1998, after which the northern communities settled onto 978. As numbers ran short again, the 351 area code was added as an overlay on the same territory, entering service on May 2, 2001 and making 10-digit dialing mandatory across the region.

The original 508 code remains just to the south, which is why the 508 area code is such a close neighbor of 978.

Dialing Format and Time Zone

• Dialing format: (978) 555-0142
• International: +1 978-555-0142
• Time zone: Eastern Time (ET), UTC−5, the same clock as Boston and the rest of Massachusetts
• 10-digit dialing required for every local call because of the 351 overlay

Geographically, 978 covers the northern band of Massachusetts — the Merrimack Valley along the New Hampshire border, the North Shore and Cape Ann coastline, and the north-central hill country stretching west toward the middle of the state. It wraps around the top of the Boston metro without including the city itself, forming a broad arc of small cities and towns rather than a single urban center.

Because the territory is so wide, 978 numbers are spread across dozens of distinct municipalities, from riverfront mill cities to seaside fishing towns.

Major Cities and Towns

• Lowell & Lawrence — the great Merrimack River mill cities, cradle of the American textile industry
• Haverhill & Methuen — the shoe-making cities upriver toward the New Hampshire line
• Andover, Chelmsford & Billerica — the suburban towns of the Merrimack Valley technology belt
• Gloucester & Newburyport — the historic fishing ports and coastal towns of Cape Ann and the North Shore
• Peabody & Salem — the North Shore cities northeast of Boston
• Fitchburg & Leominster — the north-central industrial cities toward the middle of the state

Beyond the 978 territory, the surrounding codes take over: the 617 area code and its 857 overlay cover the city of Boston to the south, 781 and 339 serve the inner suburban ring between Boston and the 978 towns, and 508 and 774 reach the south and west of the state toward Worcester and the South Coast.

Together this cluster forms one of the busiest calling regions in New England, with 978 carrying the northern mill cities, the coast and the hill towns.

The entire 978 region observes Eastern Time (ET), the same clock as Boston and the rest of Massachusetts, and shifts to Eastern Daylight Time in summer. There is no time-zone line running through the region, so every 978 number keeps identical business hours whether it rings in Lowell, Gloucester or Fitchburg — a simple but real advantage for any company routing calls across the northern half of the state.

For businesses, Eastern Time is the country's dominant commercial clock, shared with New York, Boston and the whole eastern seaboard. A 978 line opens the business day at the same moment as the East Coast financial centers, then still has the afternoon to reach customers on the West Coast before they finish work. Cloud phone systems lean on that, letting a company set hours, route calls and schedule follow-ups around a predictable Eastern-Time presence.

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Since May 2001, the 978 area code has shared its territory with a newer code, 351, in an arrangement called an overlay. Rather than splitting northern Massachusetts into smaller pieces again — which would have forced residents to change their phone numbers — regulators layered 351 directly on top of the same geographic area. Existing 978 numbers stayed exactly as they were, while new lines began drawing from the 351 code once 978 numbers grew scarce.

• 978 — the northern-Massachusetts code, in service since 1997 after the 508 split
• 351 — the overlay covering the same cities, in service since 2001 for new numbers
• Both codes require 10-digit dialing for every local call, even between two lines in the same city
• Neither code signals a specific town — a 978 and a 351 number can sit on the same street

Because 351 overlays the same ground as 978, the codes are functionally interchangeable across the region: they reach the same cities, share one local calling area, and connect to each other as local calls. For a business, that means a 978 number and a 351 number are equally native to northern Massachusetts — 978 is simply the older, far more recognizable of the two.

A 978 number connects a business to one of the most historic industrial regions in America. The Merrimack River drove the first great factories of the United States — Lowell was purpose-built in the 1820s as the country's first large-scale mill city, and Lawrence and Haverhill followed as textile and shoe capitals. Those red-brick mills have since been reborn as lofts, colleges, health centers and technology offices, and the 978 code reaches every part of the transformation.

Technology, Health Care and Education

The Merrimack Valley towns along Interstate 495 — Andover, Chelmsford, Billerica and their neighbors — form a technology and defense belt of software firms, semiconductor and instrument makers, and research offices that want a Boston-area footprint without downtown costs. Lowell anchors the region with a major public university, and hospitals and clinics across the valley round out a diverse professional base. A recognizably local 978 number keeps a company's outreach reading as native to the northern corridor.

The Coast, Central Cities and Small Business

Out on Cape Ann, Gloucester runs one of the oldest fishing industries in the nation, while Newburyport and the North Shore towns mix tourism, retail and marine trades. West of the valley, Fitchburg and Leominster carry a north-central manufacturing history in plastics and machining. The result is a market rich in contractors, clinics, shops, professional practices and startups — exactly the kind of operation that benefits from a recognizably local 978 phone number.

Modern cloud phone providers let a business activate a 978 number in minutes — no Massachusetts office, no hardware, and no long-term contract. Search available 978 numbers, complete a short verification, and route the line to any device anywhere in the world. Because 978 is instantly recognizable across northern Massachusetts, a 978 number reads as authentically local from Lowell to Gloucester, even for a team working entirely remotely.

A 978 number suits anyone who wants to feel rooted in the region: technology and manufacturing firms along the I-495 corridor, real-estate and home-service businesses across the Merrimack Valley and North Shore, professional and medical practices in the mill cities, and remote teams targeting the greater Boston market from the north.

MeraTalk provides 978 numbers as part of its cloud telephony platform — lines activate in minutes, route to any device, and pair with voicemail, call recording, auto-attendant and CRM integration from one dashboard. To set up a dedicated business phone number, search available numbers at meratalk.com.

The 978 area code exists because of 508. For most of the 1990s, 508 blanketed the whole eastern half of Massachusetts outside Boston, from the northern mill cities down to Cape Cod. When it ran low on numbers, regulators carved the northern communities out into a brand-new code — 978 — while 508 kept the south and west of the state.

The two codes are neighbors born from the same parent, split simply because one region could no longer hold everyone.

• 508 — the older code, now covering Worcester, the South Coast and Cape Cod in the south and west
• 978 — the 1997 split covering the Merrimack Valley, North Shore and north-central cities
• 351 — the overlay that shares the 978 territory, equally local to northern Massachusetts

For a business deciding between them, the choice comes down to where its customers are. A Worcester or Cape Cod firm belongs on 508, while a Lowell startup, an Andover practice or a Gloucester shop is far better matched by a 978 number that neighbors instantly read as their own.

The same 'local northern Massachusetts' quality that makes 978 useful to businesses also makes it a convenient disguise for fraud. Caller-ID spoofing lets someone anywhere in the world display a 978 prefix, so a resident sees what looks like a nearby business, bank or town office calling. The prefix itself proves nothing — genuine and spoofed calls look identical on screen, and scammers know a familiar local code is more likely to be answered.

• Fake bank or payment alerts — voicemails or texts about a 'suspicious transaction,' pushing you to call back or tap a link
• Prize and refund lures — claims you have won something or are owed a refund, requesting card details to 'process' it
• Utility and delivery threats — messages that your power will be cut or a package held unless you pay a small fee immediately

The reliable defense is to hang up and call back through a number found independently — on a bill, an official site, or a saved contact. No genuine bank, agency or utility demands gift cards or wire transfers over the phone. The federal caller-ID rules that restrict the automated and misleading calls these schemes rely on still let some slip through, so treat any pressure to act immediately as a warning sign in itself. For more, see federal caller-ID rules.

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