Area Code 309 in Illinois: Location, Cities, and Telecom Details

Peoria, Illinois is located in area code 309.

Area code 309 was established in 1957.

The overlay area code for 309 is 861.

Major cities in area code 309 include Bloomington, Peoria, and Moline. Other cities include East Moline, East Peoria, Galesburg, Normal, Pekin, and Rock Island.

The overlay code 861 was introduced to meet growing demand and prevent number exhaustion in the 309 area code region.

Area code 309 covers the west-central region of Illinois.

Area code 309 transitioned to ten-digit dialing on October 24, 2021.

The Illinois Commerce Commission (ICC) governs area code 309 and oversees telecommunications regulations in the region.

The change to 10-digit dialing was implemented to accommodate the national 988 suicide prevention lifeline.

Area code 309 supports landline, wireless, and VoIP services.

Area code 309 was created from a split of area code 815 in 1957.

Overlay code 861 was implemented for area code 309 in 2023.

You can find more information on the Illinois Commerce Commission (ICC) website.

Area code 309 in Illinois covers several cities in the west-central region of the state, including Bloomington, Peoria, and Moline. Other notable cities within this area code include East Moline, East Peoria, Galesburg, Normal, Pekin, and Rock Island. This area code has been in service since 1957.

Area code 309 was established in 1957. Originally, Illinois was divided into four numbering plan areas in 1947. Area code 309 was created by splitting area code 815 to accommodate the growing need for phone numbers in the west-central region.

Illinois uses area code 861 as an overlay for area code 309. It was introduced in 2023 to address the increasing demand for phone numbers and prevent number exhaustion in the region. This means both area codes serve the same geographic area.

As of October 24, 2021, ten-digit dialing is required for all calls within area code 309, including local calls. This change was implemented to accommodate the national 988 suicide and crisis lifeline. You must dial both the area code and the seven-digit phone number.

The overlay area code for 309 is 861. This means both area codes 309 and 861 serve the same geographic area in west-central Illinois. Overlay codes are implemented to provide additional phone numbers within a region without requiring a split of the existing area code.

Area code 309 is located in west-central Illinois, encompassing cities such as Bloomington, Peoria, and Moline. The area code serves a significant portion of the state and includes both urban and rural areas. It was established in 1957.

You should always use 10-digit dialing (area code + number) when calling any number within area code 309, even for local calls. This requirement was implemented on October 24, 2021, to accommodate the national 988 suicide and crisis lifeline.

Area code 309 supports a range of telecommunications services, including landline, wireless, and VoIP (Voice over Internet Protocol) services. These services ensure connectivity for both residential and business customers throughout the region.

NPA stands for Numbering Plan Area, and the NPA for area code 309 is, simply, 309. This three-digit code is used to identify a specific geographic region in the North American Numbering Plan.

The Illinois Commerce Commission (ICC) regulates area code 309. The ICC oversees the regulatory framework and guidelines for telecommunications within the state, including the allocation of central office codes and the implementation of overlay codes like 861.