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Before You Call Back

866 numbers

866 is one of the seven toll-free codes, in service since July 29, 2000. A 866 number is not tied to a place. It can be dialed from a landline at no charge to the caller, and the same seven digits after 800 and after 800 reach different subscribers.

Numbers starting with 866 drew 20,707 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 8,935 complaints to the FCC since November 2023. The number on your screen can be faked, so an 866 number proves nothing about where a call came from.

Where
Anywhere in the NANP (not tied to a place)
In service since
July 29, 2000
Toll-free codes
Shares the toll-free pool with 800, 888, 877, 855, 844, 833

Complaints about 866 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 866. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

20,707

FCC complaints since November 2023

8,935

Different 866 numbers reported

13,508

FCC complaints naming an 866 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202383
December 202378
January 2024158
February 2024115
March 202441
April 202473
May 202497
June 202474
July 2024120
August 2024144
September 2024125
October 2024201
November 2024113
December 202475
January 202566
February 202577
March 2025100
April 2025130
May 2025215
June 2025158
July 2025182
August 2025271
September 2025228
October 202519
November 2025122
December 2025508
January 2026737
February 2026498
March 2026457
April 2026216
May 2026337
June 2026476
July 2026410
August 2026411
September 2026644
October 2026804

What people said 866 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 17,591 of 20,707 reports were robocalls.

Show as a table
SubjectReports
Reducing your debt (credit cards, mortgage, student loans)10,248
Other6,187
Calls pretending to be government, businesses, or family and friends2,253
Dropped call or no message460
Warranties and protection plans222
Medical and prescriptions199

Most reported 866 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Check an 866 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other toll-free codes

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (8)Show