Area Code Lookup

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397 IN-SERVICE CODES
DATA 07/30/2026

781

In-service U.S. numbering code

781 Area Code

Massachusetts · Eastern Time

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Location
Massachusetts
Time zone
Eastern Time
In service since
01-Sep-1997
NANPA status
In service
Overlay codes
339
City references
No curated city reference is assigned on this site
Service type
Geographic
Source date
07/30/2026

What the 781 area code means

The 781 code is assigned in Massachusetts. It participates in an overlay complex with 339, so those codes can serve the same or overlapping numbering region. A number carrying this code is not proof of the caller’s current location.

Codes in the same overlay complex

781Eastern Time339Eastern Time

Data source and limitations

The status fields above come from the NANPA NPA report dated 07/30/2026. City references are curated for navigation and do not replace exchange-level carrier data. Number portability also means a person can keep a number after moving.

Open the official NANPA CSV source.

Last updated: July 23, 2026

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Information the tool uses

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Data accuracy

Area-code status, state or territory, overlay relationships, service type, and in-service dates are derived from the NANPA NPA database. An area code can cover many communities, and a city label is a practical lookup aid rather than proof that a specific number or caller is physically located there.

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The service is provided “as is.” Numbering plans change, and no result should be treated as emergency, legal, financial, identity, or fraud-verification advice.

Contact

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