Caller ID for
Area code 617
Area code 617 Boston, Massachusetts
Area code 617 is one of the original 1947 area codes, in Massachusetts, with numbers assigned in Boston, Cambridge, Newton and 16 more places. It’s 12:12 AM there now.
- State
- Massachusetts9 area codes in Massachusetts
- Time zone
- Eastern12:12 AM there now
- Exchanges
- 76819 places
- Overlay
- 857Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 617 is
Numbers in 617 are assigned to 19 places in 5 counties: Suffolk County, Middlesex County, Norfolk County, Essex County and Plymouth County.
Boston has the most, 43% of the exchanges; the rest are spread across 18 other places.
- Boston334
- Cambridge111
- Newton48
- Quincy44
- Brookline38
- Somerville21
- Milton17
- Everett15
- Watertown15
- Chelsea12
- Belmont10
- Waltham9
- Saugus7
- Winthrop Town5
- Dedham4
- Malden2
- Kingston1
- Weymouth Town1
- Melrose1
Phone companies in 617
768 blocks of numbers in 617 are held by 23 phone companies. The most belong to Verizon (326), Verizon Business (71) and AT&T Mobility (68).
A mix: about 22% wireless, 44% local phone and cable and 35% other carriers, including internet phone services.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
617 has been in service since 1947, when the first North American area codes were set up.
857 (since 2001) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
7 new exchanges were assigned since 2021, the latest in March 2025.
Calling 617
It’s 12:12 AM Eastern time in 617 right now.
From elsewhere in the U.S., dial 1, 617 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
Massachusetts has 9 area codes: 339, 351, 413, 508, 617, 774, 781, 857 and 978.
- 339 · Lynn, MA · same area
- 781 · Waltham, MA · same area
- 978 · Lowell, MA · about 20 mi
- 351 · Lowell, MA · about 21 mi
- 508 · Worcester, MA · about 22 mi
- 774 · Worcester, MA · about 25 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 617 area code
Map of the 617 area code around Boston, Cambridge and Newton, Massachusetts.
Cities on the map
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Questions about 617
Where is area code 617?
In Massachusetts, covering Boston, Cambridge and Newton and other places across 5 counties.
What time zone is 617 in?
Eastern time. It was 12:12 AM there when this page loaded.
Is 617 an overlay?
Yes. 857 serves the same area, so dial all 10 digits for local calls.
Which phone companies have 617 numbers?
23 companies hold blocks; the most belong to Verizon, Verizon Business and AT&T Mobility. About 22% of blocks are wireless.
Is 617 running out of numbers?
Not on record. 7 new exchanges have been assigned since 2021.