Area Code 309 in Illinois: Location, Cities, and Telecom Details
Area code 309 serves west-central Illinois, including Bloomington and Peoria. Learn about its 861 overlay, implemented to prevent number exhaustion. Details its 1957 origin, transition to ten-digit dialing in 2021, latitude/longitude coordinates of served cities, and regulatory oversight by the ICC.
Frequently Asked Questions
What is the area code for Peoria, Illinois?
When was area code 309 established in Illinois?
What is the overlay area code for 309 in Illinois?
What cities are included in area code 309?
Why does area code 309 have an overlay code?
What part of Illinois is covered by area code 309?
When did area code 309 switch to 10-digit dialing?
What is the regulatory body for area code 309?
What was the reason for the 10-digit dialing change in area code 309?
What telecommunication services are available in area code 309?
What area code was 309 originally part of?
When was the overlay code 861 implemented for area code 309?
Where can I find more information about area code 309 regulations?
What cities are in area code 309 Illinois?
When was area code 309 established?
Why does Illinois have area code 861?
How to dial a number in area code 309?
What is the overlay area code for 309?
What is area code 309 Illinois location?
When should I use 10-digit dialing for 309?
What telecom services are available in area code 309?
