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

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

Area Code 309 is a vital telecommunications identifier for the west-central region of Illinois. It includes thriving cities such as Bloomington, Peoria, and Moline. Established in 1957, it plays a crucial role in connecting communities within the state.

Key Facts About Area Code 309

  • Location: West-central Illinois
  • Major Cities: Bloomington, Peoria, Moline
  • Established: 1957
  • Overlay Code: 861

Where is Area Code 309 Located?

Area Code 309 serves a significant portion of Illinois, covering a diverse range of cities:

CityLatitudeLongitude
Bloomington40.4842??N-88.99369??W
East Moline41.50087??N-90.4443??W
East Peoria40.66615??N-89.5801??W
Galesburg40.94782??N-90.37124??W
Moline41.5067??N-90.51513??W
Normal40.5142??N-88.99063??W
Pekin40.56754??N-89.64066??W
Peoria40.69365??N-89.58899??W
Rock Island41.50948??N-90.57875??W

Technical Specifications

  • NPA Code: 309
  • Overlay Code: 861
  • Implementation Date: 1957
  • State: Illinois

Telecom Services and Network Infrastructure

Area Code 309 supports a variety of telecommunications services, ensuring connectivity across urban and rural areas.

Major Carriers and Services

  • Landline Services
  • Wireless Services
  • VoIP Services

The introduction of overlay code 861 ensures the region can accommodate growing demand and prevent number exhaustion.

Regulatory Information

Area Code 309 is governed by the Illinois Commerce Commission (ICC), which oversees the regulatory framework and guidelines for telecommunications in the region.

  • Dialing Requirements: Transitioned to ten-digit dialing on October 24, 2021
  • NANPA Regulations: Includes allocation of central office codes and overlay implementation

Historical Context and Milestones

  • 1947: Illinois was initially divided into four numbering plan areas.
  • 1957: Area Code 309 was created from a split of area code 815.
  • 2021: Change to ten-digit dialing to accommodate the national 988 lifeline.
  • 2023: Introduction of overlay code 861 to meet growing demand.

Conclusion and Further Resources

Area Code 309 remains a cornerstone of Illinois' telecommunications infrastructure, supporting both large cities and smaller communities. The addition of overlay code 861 ensures continued service availability.

For more detailed information, visit the Illinois Commerce Commission's official site or explore the Area Code 309 Wikipedia page.

These resources provide further insights into how area codes function and their impact on regional telecommunications.

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