Verified area-code information

866 Area Code

866 is an in-service non-geographic North American area code for toll-free. It is not tied to a city or state.

Official Numbering RegionVerified NANPA Assignment
Toll-FreeArea Code 866
Country: North American numbering plan•Time Zone: No geographic time zone•Overlays: 800, 888, 877, 855, 844, 833•In Service: 29-Jul-2000
Numbering country
North American numbering plan
Area-code type
Non-geographic
Numbering region
Not applicable
Time-zone information
No geographic time zone
In service since
29-Jul-2000

What area codes overlay 866?

The NANPA source lists 800, 888, 877, 855, 844, 833 in the same overlay complex. An overlay can serve the same broad numbering area; individual numbers still do not prove where a person is.

Check a number with area code 866

Enter the full ten-digit number to see its structure and formatting. The check stays in your browser.

Check a 866 number

Enter a 10-digit +1 North American number. We check its structure and area-code record, not the caller’s identity or whether the line is active.

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Received an unfamiliar call?

The displayed number may be spoofed. Do not rely on an area code as proof of caller identity. If the caller claims to represent a business, end the call and contact that business using a number you found independently.

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Common questions about 866

Does 866 mean the caller is in a specific place?

No. An area code is an assignment, and a person can travel, move, use internet calling, or display a spoofed number.

Can this page identify who called?

No. OfficialAreaCode has no live subscriber directory or spam-report database.