The 978 area code is located in the state of Massachusetts, and according to Intelius data, covers roughly 798,325 phone numbers and 1,175,242 listings across 786 prefixes.
This is a General Purpose Code, in service since September 1, 1997.
Area code 978 is part of an overlay complex shared with:
Area code 978 was split from area code 508.
Local calls within area code 978 require 10 digits dialing, while long-distance calls require 1 plus 10 digits dialing.
Have you received a call from a number with a 978 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.
| County Population (2025) | 826,653 |
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| County Population (2025) | 70,698 |
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| County Population (2025) | 1,669,979 |
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| County Population (2025) | 888,502 |
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