Chelmsford, Massachusetts
Eastern Time Zone (UTC-5) · MA · —
About Area Codes in Chelmsford, Massachusetts
Chelmsford, Massachusetts is served by 2 area codes: 978, 351. 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 Chelmsford require 10-digit dialing. The city is in the Eastern time zone (UTC-5).
Frequently Asked Questions
What area code is Chelmsford, Massachusetts?
Chelmsford, Massachusetts uses area codes 978 and 351.
What time zone is Chelmsford in?
Chelmsford is in the Eastern time zone (UTC-5).
Do I need to dial 10 digits when calling Chelmsford?
Yes, all local calls in Chelmsford require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 978 created?
Area code 978 was established in 1997 as a geographic split from a larger area code region to serve the growing population.
What cities share area code 978 with Chelmsford?
Other cities sharing area code 978 with Chelmsford include Amesbury, Andover, Beverly, Billerica, Dracut, among others.
Chelmsford, MA · Eastern Time Zone