Cambridge, Massachusetts
Eastern Time Zone (UTC-5) · MA · —
About Area Codes in Cambridge, Massachusetts
Cambridge, Massachusetts is served by 2 area codes: 617, 857. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within Cambridge require 10-digit dialing. The city is in the Eastern time zone (UTC-5).
Other cities in area code 617
Frequently Asked Questions
What area code is Cambridge, Massachusetts?
Cambridge, Massachusetts uses area codes 617 and 857.
What time zone is Cambridge in?
Cambridge is in the Eastern time zone (UTC-5).
Do I need to dial 10 digits when calling Cambridge?
Yes, all local calls in Cambridge require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 617 created?
Area code 617 is one of the original 86 area codes established in 1947 as part of the North American Numbering Plan (NANP).
What cities share area code 617 with Cambridge?
Other cities sharing area code 617 with Cambridge include Boston, Brookline, Newton, Quincy, Somerville, among others.
Also called Cambridge:
Cambridge, MA · Eastern Time Zone