WhoCalledLookupUS

866 Area Code — Toll-free Code

Area code 866 is a toll-free code, not tied to any state in the Eastern time zone, in service since 2000. Consumers have filed 28,031 unwanted-call complaints against 14,908 different 866 numbers, 6,099 of them with the FTC in the last 30 days. Look up the exact number that called you below.

866 is a toll-free code. Read the 866 toll-free number guide (what 866 numbers are, who uses them, this month's scam patterns and how to block them) or see the toll-free number lookup for all seven codes.

Area code 866 at a glance

Type
Toll-free (no fixed location)
Local time
—Eastern
In service since
July 29, 2000
Overlay codes
800 (1966), 888 (1996), 877 (1998), 855 (2010), 844 (2013), 833 (2017)

Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.

14,908
Reported numbers
16,878
FTC DNC reports
11,153
FCC complaints
6,099
Last 30 days (FTC)

Most-reported 866 numbers this month

Ranked by FTC Do Not Call complaints filed in the last 30 days. Only numbers with enough complaints for a full report page are listed. Click one for what it was reported for and where.

What calls from 866 numbers are about

16,878 FTC Do Not Call complaints about 866 numbers since Jul 24. The most common named subject is debt-relief pitches, at 50% of complaints (93% of those were recorded messages). Overall, 88% of callers who answered said the call was a robocall.

FTC complaint subjects

  • Debt reduction8,48550%
  • Other / unspecified5,12330%
  • Impostor (government, business, family)1,71810%
  • No subject given7424%
  • Dropped call / no message3432%
  • Medical & prescriptions1781%
  • Warranties & protection plans1171%

FCC complaints by call type, last 2 years

  • Prerecorded Voice1,39973%
  • Live Voice40521%
  • Text Message1256%

Live-voice calls are from a person; prerecorded calls are robocalls.

When 866 spam calls come in

28% of complaints that give a call time describe calls between 1pm and 4pm. 92% came Monday to Friday, most on Tuesdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.

By hour of the day

By day of the week

Is it getting worse?

6,612 FTC complaints about 866 numbers in the last four weeks, up 13% on the four weeks before. FCC complaints about 866 numbers peaked in 2017 (1,315); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.

FTC complaints per week

FCC complaints per year

Years shown as '15 to '26; the current year is partial.

Likely campaigns using 866 numbers

Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.

Busiest 866 prefixes this month

FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.

PrefixComplaintsNumbers
(866) 771-xxxxcampaign1473131
(866) 398-xxxxcampaign30023
(866) 386-xxxxcampaign28726
(866) 342-xxxxcampaign26278
(866) 388-xxxxcampaign216111

Recently reported 866 numbers

866 numbers with the newest FTC or FCC complaints: the callers active right now.

What to do about calls from 866 numbers

Before you call back

  • Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
  • Look up the full number above. A missed call from 866 with no voicemail is usually a robocall; anyone who needs you will leave a message.
  • Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).

Report it

Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.

Area code 866: questions answered from the data

Where is area code 866?

Area code 866 is not tied to a location. It is a toll-free code reachable from anywhere in the North American Numbering Plan, so the digits say nothing about where the caller is.

What time zone is area code 866 in?

Area code 866 is in the Eastern time zone (UTC−5, or UTC−4 during daylight saving time). The current local time is shown at the top of this page.

Which area codes overlay 866?

800 (in service 1966), 888 (in service 1996), 877 (in service 1998), 855 (in service 2010), 844 (in service 2013) and 833 (in service 2017) serve the same area as 866. New numbers there can be issued with any of these codes, and local calls need all 10 digits. A spoofed call can display any of them.

What are calls from 866 numbers usually about?

Since Jul 24, consumers filed 16,878 FTC Do Not Call complaints about 866 numbers. The most common named subject was debt-relief pitches: 50% of complaints, 93% of them recorded messages. Across all subjects, 88% of callers who answered the question said the call was a robocall.

When do 866 spam calls happen?

28% of the complaints that give a call time describe calls between 1pm and 4pm, and 92% came on weekdays, most often on Tuesday. Times are as consumers reported them.

Are 866 robocalls increasing?

In the four weeks to Oct 15, consumers filed 6,612 FTC complaints about 866 numbers, 13% more than the four weeks before.

How do I report an 866 scam call?

Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. Reports feed the public data this page is built from.

Overlay and nearby area codes

Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.