Area codes in Lexington, Massachusetts
Lexington, Massachusetts uses 2 area codes — 781 and 339. The main Lexington area code is 781.
Area codes serving Lexington
Phone numbers in Lexington are written as ten digits — for example (781) 555-0190 — and fall in the Eastern Time zone.
How Lexington came to have 2 area codes
The original Lexington area code is 781, in service since 1997. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 339 (2001). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Lexington now uses all 2 codes and every local call is dialed with ten digits.
All Massachusetts area codes · Is a Lexington call a scam?
Nearby cities
- Winchester area codes
- Cambridge area codes
- Boston area codes
- Lowell area codes
- Quincy area codes
- Brockton area codes
- Worcester area codes
- Manchester area codes
Frequently asked questions
What is the area code for Lexington?
The main area code for Lexington, Massachusetts is 781. Lexington is now served by 2 area codes in total: 781, 339.
How many area codes does Lexington have?
Lexington has 2 area codes: 781, 339.
Why does Lexington have more than one area code?
As Lexington used up the numbers available in its original area code (781, in service since 1997), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Lexington number?
Dial all 10 digits — the area code (781 or 339) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.