Massachusetts · Eastern Time
Lowell, MA Area Codes
Lowell is served by 2 area codes (351, 978). Here's which is original, which are overlays, and how to pick one for a new local number.
Last updated June 5, 2026
Area codes serving Lowell
Lowell sits in Massachusetts, part of the Northeast region and the Eastern Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 351, 978.
The original code is 351. As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.
How to pick an area code for a new number
When you activate a new line in Lowell, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 351), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.
Dialing in Lowell
Because Lowell is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in Massachusetts, visit the Massachusetts area codes page.
Quick answers
Lowell area code FAQ
What area codes does Lowell use?
Lowell, MA is served by 2 area codes: 351, 978.
Which is the original Lowell area code?
351 is the original/primary code for Lowell; the others are overlays added later for more numbers.
Do I need to dial the area code in Lowell?
Yes. With multiple overlapping codes, 10-digit dialing is required for every call in this area.