| District of Massachusetts area codes: 978 | |
|---|---|
| Country | United States |
| State/Province | Massachusetts |
| Major City | Boston |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 978-306 | Essex | Salem, MA | Conversent Communications Of Massachusetts |
| 978-307 | Middlesex | Sudbury, MA | Verizon New England Inc. |
| 978-308 | Essex | West Newbury, MA | Conversent Communications Of Massachusetts |
| 978-309 | Essex | Rockport, MA | Ctc Communications Corp. |
| 978-310 | Middlesex | Hudson, MA | Teleport Communications America |
| 978-312 | Essex | Ipswich, MA | Comcast Phone Of Massachusetts |
| 978-313 | Middlesex | Billerica, MA | Teleport Communications America |
| 978-314 | Essex | Lawrence, MA | Cellco Partnership DBA Verizon Wireless |
| 978-315 | Middlesex | Wilmington, MA | Peerless Network Of Massachusetts |
| 978-316 | Middlesex | Concord, MA | Verizon New England Inc. |
| 978-317 | Essex | Salem, MA | New Cingular Wireless PCS - DC |
| 978-318 | Middlesex | Concord, MA | Verizon New England Inc. |
| 978-319 | Middlesex | Lowell, MA | Level 3 Communications |
| 978-320 | Middlesex | Westford, MA | Sprint Spectrum L.p. |
| 978-321 | Worcester | Winchendon, MA | Peerless Network Of Massachusetts |
| 978-322 | Middlesex | Lowell, MA | Verizon New England Inc. |
| 978-323 | Middlesex | Lowell, MA | Verizon New England Inc. |
| 978-324 | Franklin | Orange, MA | Norfolk County Internet |
| 978-325 | Essex | Gloucester, MA | Rcn Telecom Services |
| 978-326 | Essex | Peabody, MA | Teleport Communications America |
There are 743 prefixes, In the code area, the major cities are Beverly, MA;Chelmsford, MA;Danvers, MA;Fitchburg, . The major city is Boston.