Chelmsford, Massachusetts
Chelmsford, Massachusetts, in Middlesex County, has ZIP code 01824 and area code 978, with 351 as an overlay.
- ZIP code
- 01824
- Area codes
- 978, 351
- County
- Middlesex County
- State
- Massachusetts
- Time zone
- Eastern Time
- Coordinates
- 42.5911, -71.3556
ZIP codes in Chelmsford
Area codes for Chelmsford
- Area code 978
In service since September 1, 1997. Shares its area with 351. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.
- Area code 351
In service since May 2, 2001. Shares its area with 978. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.
Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.
Time zone
Chelmsford is in the Eastern Time zone.
Towns near Chelmsford
- North Billerica5.6 km (3.5 mi)
- North Chelmsford5.6 km (3.5 mi)
- Lowell6.4 km (4.0 mi)
- Westford6.9 km (4.3 mi)
- Carlisle7 km (4.3 mi)
- Billerica8.8 km (5.5 mi)
- Nutting Lake9.2 km (5.7 mi)
- Dracut10 km (6.2 mi)
Local numbers in area code 978
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- (978) 472-9877Concord, MA$59View & buy
- (978) 473-7987Beverly, MA$59View & buy
- (978) 481-7898Princeton, MA$59View & buy
- (978) 488-4789Billerica, MA$59View & buy
- (978) 517-8767Amesbury, MA$59View & buy
- (978) 540-5432Littleton, MA$59View & buy
- (978) 540-7787Littleton, MAAlso spells SPUR$59View & buy
- (978) 547-6787Billerica, MAAlso spells OPUS$59View & buy
- (978) 558-9878Bolton, MA$59View & buy
- (978) 571-6787Westminster, MAAlso spells OPUS$59View & buy
- (978) 577-5567Westford, MA$59View & buy
- (978) 577-5670Westford, MA$59View & buy
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