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US area code · Illinois

Area code 309

Where the 309 area code is, its overlay and how to dial a +1 309 number from anywhere.

CoversBloomington, IllinoisTime zoneCentral (CT)TypeOverlay
Quick answer

The 309 area code is in Bloomington, Illinois, United States (Central (CT)). To call from abroad: +1 309 555-0123. It is an overlay, so all 10 digits are dialled.

StateIllinois
Main areaBloomington
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1957

The 309 area code is a geographic North American Numbering Plan (NANP) code covering Bloomington, Illinois. It has been in service since 01-Jan-1957 and sits in the Central (CT) time zone.

Overlay 309 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

309861

How to dial a 309 number

From abroad+1 309 555-0123
Within the US / Canada1 309 555-0123
Locally (same area)309 555-0123

Cities in the 309 area code

A 309 number is usually in one of these places in Illinois — 5 counties.

Bloomington McleanEast Moline Rock IslandEast Peoria TazewellGalesburg KnoxMoline Rock IslandNormal McleanPekin TazewellPeoria PeoriaRock Island Rock Island

Other Illinois area codes

217224312331447464618630708730773779815847861872

Frequently asked questions

Where is the 309 area code?

The 309 area code is in Bloomington, Illinois, United States (Central (CT)).

Is 309 an overlay area code?

Yes. 309 overlays the same region as 861, so callers dial all 10 digits.

Do I have to dial 10 digits for 309?

Yes — dial the area code plus the seven-digit number.

How do I call a 309 number from another country?

Dial your exit code (or +), then 1, then 309, then the number: +1 309 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 309 number does not pinpoint a street or ZIP code.

Missed a call from +1 309?

In the 30 days to September 24, 2026, 501 unwanted calls showing a 309 number were reported to the US Federal Trade Commission, 75% of them recorded messages or robocalls. That puts 309 at #205 of 670 area codes reported.

Other224
Reducing your debt (credit cards, mortgage, student loans)135
Calls pretending to be government, businesses, or family and friends42
Dropped call or no message33
Before you call back
  • If you do not know anyone in Illinois, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 309 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 309 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 309:

Frontier North, Inc. 99Illinois Bell Tel Co 83Onvoy, LLC 73Level 3 Communications, LLC 66Cellco Partnership Dba Verizon Wireless 46Mediacom Telephony Of Illinois, LLC 39

About 14.5% of the 800 prefixes in use belong to mobile carriers: a 309 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 309 — cities & rate centres