| General Information | |
|---|---|
| Country | United States |
| State/Province | Massachusetts |
| Major City | Lowell |
| Time Zone | Eastern (UTC-05:00) |
| Current Local Time | 05:00 |
| Prefix | County | Primary City |
|---|---|---|
| 978-201 | Middlesex | Boxborough |
| 978-202 | Middlesex | Concord |
| 978-203 | Middlesex | Wilmington |
| 978-204 | Essex | Lawrence |
| 978-205 | Middlesex | Wilmington |
| 978-206 | Middlesex | Acton |
| 978-207 | Middlesex | Lowell |
| 978-208 | Essex | Lawrence |
| 978-209 | Middlesex | Sudbury |
| 978-210 | Essex | Peabody |
| 978-212 | Worcester | Worcester |
| 978-213 | Essex | Topsfield |
| 978-214 | Middlesex | Wilmington |
| 978-215 | Middlesex | North Billerica |
| 978-216 | Worcester | Bolton |
| 978-217 | Middlesex | Sudbury |
| 978-218 | Worcester | Southborough |
| 978-219 | Essex | Salem |
| 978-221 | Middlesex | Lowell |
| 978-222 | Middlesex | Cambridge |
| 978-223 | Essex | Danvers |
| 978-224 | Essex | Salem |
| 978-225 | Essex | Newbury |
| 978-226 | Middlesex | Tyngsboro |
| 978-227 | Worcester | Leominster |
| 978-228 | Essex | Haverhill |
| 978-229 | Suffolk | Boston |
| 978-230 | Worcester | Leominster |
| 978-231 | Essex | Gloucester |
| 978-232 | Essex | Beverly |
| 978-233 | Essex | South Hamilton |
| 978-234 | Essex | Georgetown |
| 978-235 | Worcester | Fitchburg |
| 978-236 | Essex | Beverly |
| 978-237 | Essex | Lawrence |
| 978-238 | Essex | Ipswich |
| 978-239 | Essex | Peabody |
| 978-240 | Middlesex | Hudson |
| 978-241 | Essex | Haverhill |
| 978-242 | Essex | Lawrence |
| 978-243 | Middlesex | Maynard |
| 978-244 | Middlesex | Lowell |
| 978-245 | Middlesex | Concord |
| 978-246 | Middlesex | Maynard |
| 978-247 | Essex | Andover |
| 978-248 | Worcester | Athol |
| 978-249 | Worcester | Athol |
| 978-250 | Middlesex | Lowell |
| 978-251 | Middlesex | Lowell |
| 978-252 | Worcester | Ashburnham |