Area code 617

About area code 617

Area code 617 is a geographic area code in Massachusetts, in service since January 1, 1947, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 617 and 857 cover the same territory, so neighbors on the same street can have different area codes. It is in the Eastern time zone. The places with the most assigned exchanges include Boston, Cambridge, Newton, Quincy, and Brookline. By population, its largest named places are Boston, Cambridge, Quincy, Newton, and Somerville.

Places served by 617

617 holds 16% of the 4,743 central office codes assigned in Massachusetts, the 3rd most of the state's 9 codes. 19 Census places could be matched to rate centers with 617 exchanges; the most populous are Boston (673,000), Cambridge (121,000), Quincy (103,000), and Newton (90,700). For a storefront or service area inside 617, the place pages show which prefixes are rated local there.

Dialing 617 numbers

According to NANPA's dialing-plan data, local calls within 617 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at service provider discretion"

Who holds 617 exchanges

24 carriers hold the 768 central office codes assigned in 617. Verizon New England INC. has the most, with 326 (42%). 401 of the codes (52%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Rate centers and towns in 617

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 617 has codes in 27 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

Number supply in 617

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 768 are assigned in 617, 96% of 800. 7 were assigned in 2020 or later.

Using area code 617 for business calls

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

If you already have a number in area code 617, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.