Massachusetts has nine area codes: 617 and 857 for Boston and its core, 781 and 339 for the inner suburbs, 978 and 351 for the northeast and north-central part of the state, 508 and 774 for central and southeastern Massachusetts including Cape Cod and the Islands, and 413 for western Massachusetts. If you need one Massachusetts area code for a business number, choose the one that matches where your customers live, not where your office sits.
This guide maps each code to its region and explains how overlays work, since they are why a new Boston number often starts with 857 instead of 617. It also covers when a local Massachusetts phone number is worth having for calls and texts. We make Ready, so we use it as the worked example for picking a local number and registering it for 10DLC texting. The area code information applies whatever provider you use.
Every Massachusetts area code, by region
Six of the nine codes are overlays. An overlay is a second code added to the same territory once the original runs low on numbers. The two codes cover the same towns, and neither one is "more local" in a technical sense.
| Area code | Region | Major cities and towns | Overlay pair |
|---|---|---|---|
| 617 | Boston and the urban core | Boston, Cambridge, Somerville, Brookline, Quincy, parts of Newton | 857 |
| 857 | Same as 617 | Same as 617 | 617 |
| 781 | Inner suburbs ringing Boston | Lynn, Waltham, Lexington, Woburn, Burlington, Braintree, Weymouth, Dedham, Norwood | 339 |
| 339 | Same as 781 | Same as 781 | 781 |
| 978 | Northeast and north-central MA | Lowell, Lawrence, Haverhill, Salem, Gloucester, Newburyport, Fitchburg, Leominster, Concord | 351 |
| 351 | Same as 978 | Same as 978 | 978 |
| 508 | Central and southeastern MA | Worcester, Framingham, Brockton, New Bedford, Fall River, Plymouth, Cape Cod, Martha's Vineyard, Nantucket | 774 |
| 774 | Same as 508 | Same as 508 | 508 |
| 413 | Western MA | Springfield, Pittsfield, Northampton, Amherst, Holyoke | None (single code) |
The Boston Massachusetts area code: 617 vs 857
People searching for "the Boston Massachusetts area code" usually mean 617. It is one of the original 1947 area codes and the one most people around Boston recognize. The 857 overlay arrived in 2001. Because 617 numbers have been in use for decades, provider inventory of them is thin. A new number in Boston, Cambridge or Somerville is more likely to be 857. If a 617 number matters to you, check availability before you commit to a provider.
781 and 339: the Route 128 ring
The 781 code split from 617 in 1997. It covers the suburbs between Boston and roughly the I-495 belt on the north, west and south sides. 339 is its overlay. A business serving Waltham, Lexington or the South Shore fits naturally here.
978 and 351: north of Boston to the New Hampshire line
The 978 region runs from the North Shore (Salem, Gloucester, Newburyport) through the Merrimack Valley (Lowell, Lawrence, Haverhill) and west to Fitchburg and Leominster. It is a large area, so "local" here is a regional signal rather than a neighborhood one.
508 and 774: Worcester to the Cape
508 is the largest Massachusetts region by land area. It stretches from Worcester and Framingham east to Brockton and south through New Bedford, Fall River, Plymouth, Cape Cod and the Islands. 774 is its overlay.
413: western Massachusetts
413 covers everything west of roughly the Worcester County line: Springfield, the Pioneer Valley and the Berkshires. It is the only Massachusetts area code without an overlay as of this writing, so every number there still starts with 413.
Dialing in Massachusetts: always 10 digits
Every region except 413 has an overlay, so 10-digit dialing has been standard in eastern Massachusetts since 2001. In practice, store every number in E.164 format (+1 followed by 10 digits) in your CRM and messaging tools. That keeps 617/857 and 978/351 numbers from getting mixed up, and it is the format any SMS API expects.
Why a local Massachusetts phone number is worth having
There is no official statistic on how much a local area code lifts answer or reply rates. Anyone who quotes you a precise percentage is guessing. The reasons businesses choose one are practical:
- Recognition. A 508 number calling someone in Worcester looks like a neighbor, a doctor's office or a contractor. An out-of-state code looks like a call center.
- Callbacks. Customers return missed calls and texts more readily to a number that looks local, and the number on your yard sign or truck matches the one that texts them.
- Regional businesses. A company covering both Springfield and Boston may want a 413 number and an 857 number rather than one number for the whole state.
Be clear about what an area code won't do. It does not decide whether your texts get delivered. For SMS, deliverability depends on carrier registration and message content. An unregistered 617 number gets filtered just like an unregistered number from anywhere else. If you take one thing from this post, take that.
How to pick the right code (a quick decision list)
- Serving one metro? Use that region's code. Boston proper: 617 if available, otherwise 857. The same goes for each pair.
- Serving several regions? Get one number per region, such as 857 for Boston, 508 for Worcester and the South Coast, and 413 for the Pioneer Valley, then send each contact's texts from the closest number. That is what local presence does (below).
- Selling into Massachusetts from out of state? A Massachusetts number helps with recognition, but keep it truthful. Your business name should still appear in the first text.
- Don't chase the "original" code. 857 and 617 cover identical territory. Locals know both, and an 857 number reads as Boston.
Worked example: setting up Massachusetts numbers on Ready
Here is how the setup looks on Ready for a hypothetical home-services company that covers Greater Boston, Worcester and Springfield. The assumptions are three numbers (857, 508, 413), appointment-reminder texts and about 2,000 consented customers a month.
Step 1: buy the numbers
Search for available numbers by area code in the app, or do it from your own software with GET /v1/numbers/available?area_code=617, then start the purchase with POST /v1/numbers/checkout and buy with POST /v1/numbers and the payment_intent_id it returns (our post on buying phone numbers with an API covers the platform side). Check 617 availability first and fall back to 857 if none is listed.
Step 2: register for 10DLC
All three numbers go on one registered brand and campaign. Ready handles registration in-app. There is no setup fee: the charge at submit is the first month, $25. After that the monthly cost is $25 for registration + $2 per number. With three numbers:
- Brand: $10
- Campaign: $20
- Numbers: 3 at $2 each = $6
- Total: $31/mo
Most approvals take 2 to 7 days. Pick the use case that matches what you actually send. Reminders are not marketing, and a mismatch causes trouble later; our use-case picking guide explains why. For the full fee breakdown, see 10DLC cost: every fee explained.
While you wait, the account can send up to 500 texts a month at its normal per-text rate. If you bought the number before registering, those texts go out on Ready's shared registration while yours is in review. The first 20 texts are free one-to-one sends. They end the moment a registration is paid for, so use them before you register. To send, you add a card and get a number, which is $2 a month with the first month charged when you get it.
Step 3: send from the closest number
Local presence is on by default, so Ready sends each text from the account's number closest to the contact's area code. A Worcester contact (508 or 774) gets the 508 number, and a Springfield contact gets the 413. Every number still sits on the registered campaign. Local presence chooses among registered numbers; it does not bypass registration. Through the API, leave from out:
POST https://api.tryready.com/v1/messages
X-API-Key: <key>
Idempotency-Key: 3f6c2a9e-1b7d-4c55-9a0e-8d2f1e7b4c10
{"to": "+15085550142", "body": "Acme Home Services: your tech arrives Tue 10-12. Reply C to confirm or STOP to opt out.", "consent_attested": true}In GoHighLevel, send as usual. A team member's own key or GoHighLevel seat sends from the number assigned to that member. Full request details are in the messages docs and the quickstart.
Step 4: the monthly math
That reminder runs under 160 plain characters, so it is 1 segment. Ready Standard is $0.0075/segment plus a $0.0045 carrier fee:
- Sends: 2,000 × $0.0075 = $15, plus 2,000 × $0.0045 in carrier fees
- Replies are billed like sent texts. If 600 customers reply "C", that is 600 × ($0.0075 + $0.0045).
- Registration: $31/mo
Ready's all-in prices per segment include the carrier fee but not screening: Scrub lists and Number validation, the two switches in Settings under Compliance, each add $0.003 per segment when switched on, shown as screening on your bill, and both are off by default. Unless you turn the opt-out footer off, the first text to each contact, and one again from time to time, also gets "Reply STOP to opt out" and your business name if the message does not already have them, so a text close to the segment limit can bill one more segment.
Add an emoji and the reminder drops to a 70-character limit, which could turn 1 segment into 2 or 3 and double or triple the send cost. Keep transactional texts plain.
To be honest about price: raw carrier APIs and LeadConnector charge less per segment. With Ready you pay for registration handled in-app, quiet-hours holds, automatic STOP handling and an inbox included in the platform. Number validation is there too, at $0.005 a number. You can also call from the same numbers with the Ready Dialer at $0.025/min.
An optional blue line
If most of your customers use iPhones, a blue line sends as iMessage with your business name and photo. It costs $99 a month per line plus 6 cents a segment, and it needs no 10DLC registration. Each line can start up to 50 new conversations a day. Campaigns still go from your regular numbers.
Massachusetts compliance notes
Massachusetts is entirely on Eastern time. Quiet-hours enforcement is simpler than in a two-time-zone state, but it still applies, and Ready holds sends outside permitted local hours. Massachusetts also keeps its own do-not-call rules for telemarketing on top of the federal ones. Text only consented contacts or people who have replied, and check state specifics with counsel. Compliance is ultimately the sender's responsibility. Tools reduce risk; they don't remove it. Campaigns, drip campaigns and automations wait up to 24 hours for the window; a one-to-one or API text is held only if the window opens within 6 hours, otherwise it is refused and must be resent; a one-to-one reply to someone who texted you in the last 24 hours goes out at any hour.
The practical takeaway
Match the code to your customers' region. Don't pay extra effort for 617 over 857, and get one number per region if you cover more than one. Then register before you scale, because registration decides whether texts are delivered, and the area code only helps once they are. When you're ready to try it, sign up, buy a number in the code you need and send your free texts before you register.
FAQ
What is the area code for Boston, Massachusetts? 617, with 857 as an overlay covering the same territory. Most new Boston numbers are 857 because 617 inventory is scarce.
How many area codes does Massachusetts have? Nine: 617, 857, 781, 339, 978, 351, 508, 774 and 413.
Is an 857 number less local than a 617 number? No. They cover identical towns, and people in Boston recognize both. The only difference is that 617 has been around longer.
Does a Massachusetts area code improve text deliverability? No. Delivery depends on 10DLC registration and message content. A local code may help with recognition, but it won't get an unregistered number past carrier filtering.
What does a Massachusetts number cost to register for texting on Ready? The charge at submit is $25 for the first month. After that it is $25 for registration + $2 per number each month, and most approvals take 2 to 7 days.