Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/861

861 area code

Area code 861 is in Illinois. It covers Peoria, Moline, Rock Island and 16 other places: 44 ZIP codes in Peoria, Rock Island, Tazewell and 1 other county. Local time there is , Central Time. In service since 2023 as an overlay: it covers the same area as 309, so a number from there can have either code.

Time zone
Central
Largest city
Peoria
Overlays
309
In service since
2023
Rate centres
5
Prefixes assigned
8 (80,000 numbers)

Who calls from a 861 number

NANPA records the carrier each block of 861 numbers is assigned to. Of the 11,000 861 numbers assigned, 100% are with cable, internet-calling, business and other carriers (Exiant Communications, Onvoy and 8x8).

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 861 numbers
CarrierKindShare
Exiant CommunicationsCable, VoIP, other45%
OnvoyCable, VoIP, other18%
8x8Cable, VoIP, other9%
AhoiCable, VoIP, other9%
Intrado CommunicationsCable, VoIP, other9%
OpentactCable, VoIP, other9%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 861

The 5 places with a telephone rate centre of their own using 861, largest first. Each links to its ZIP codes.

Places in area code 861
PlaceZIP codesPopulation
Peoria, IL 29 112,169
Moline, IL 2 42,197
Rock Island, IL 3 36,151
Pekin, IL 3 31,781
Danvers, IL 1 1,130

Nearby places using 861

These places have no rate centre of their own in NANPA's records; the nearest one uses 861. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 861

44 ZIP codes in 11 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 861 numbers are issued

NANPA's rate centres with the most 861 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 861
Rate centrePlacePrefixes
PEORIA Peoria 4
DANVERS Danvers 1
MOLINE Moline 1
PEKIN Pekin 1
ROCKISLAND Rock Island 1

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 861

Where is area code 861?

Area code 861 is in Illinois. It covers Peoria, Moline, Rock Island and 16 other places: 44 ZIP codes in Peoria, Rock Island, Tazewell and 1 other county.

What ZIP codes are in area code 861?

44 ZIP codes, by the town each is mailed to: Peoria (29, 61601 to 61656), Moline (2, 61265 to 61266), Rock Island (3, 61201 to 61299), Pekin (3, 61554 to 61558) and 7 more towns. The full list is on this page.

What time zone is area code 861 in?

Central time.

Is a 861 number a mobile or a landline?

It can be either. 0% of 861 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

What area codes overlay 861?

309. They cover the same area as 861, so a new number there can be given any of them.

Does a 861 number mean the caller is in Illinois?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 861 call can come from anywhere.

Other area codes in Illinois

All 17 Illinois area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 861.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/861

Underlying data is public domain or openly licensed — sources, vintages and licences.