What cities are covered by area code 217?

Area code 217 covers major cities in central Illinois, including Springfield, Champaign, Urbana, Charleston, Danville, Decatur, and Quincy.

When was area code 217 established?

Area code 217 was established in 1947 as one of the original North American area codes.

What is the overlay area code for 217?

The overlay area code for 217 is 447, introduced in 2021.

Why was area code 447 introduced as an overlay for 217?

Area code 447 was introduced to ensure a sufficient supply of phone numbers due to growing demand in the region.

What type of dialing is required in area code 217?

Ten-digit dialing is required for local calls in area code 217 due to the overlay with area code 447.

What services are available under area code 217?

Services available under area code 217 include landline, wireless, and VoIP.

Which major carriers operate in area code 217?

Major carriers in area code 217 include AT&T, Verizon, and T-Mobile.

What is the significance of area code 217 in Illinois?

Area code 217 is significant as it covers central Illinois, including the state capital, Springfield, and plays a crucial role in the region's telecommunications.

Has area code 217 undergone any boundary changes?

Yes, in 1951, boundary adjustments shifted most of the southern portion of Metro East to area code 618, and in 1956, the northern section merged with area code 815 to create area code 309.

What is the NPA code for area code 217?

The NPA (Numbering Plan Area) code for area code 217 is 217 itself.

How does the overlay with area code 447 affect local calling?

The overlay with area code 447 requires ten-digit dialing for local calls to ensure proper routing and availability of numbers.

What is the geographical latitude and longitude of Springfield, IL in area code 217?

Springfield, IL is located at a latitude of 39.80172 and a longitude of -89.64371.

Where can I find more information about area code 217?

More information about area code 217 can be found on the Illinois Commerce Commission website or the Wikipedia page for area code 217.

What historical milestones are associated with area code 217?

Key milestones include its establishment in 1947, boundary adjustments in 1951 and 1956, and the introduction of area code 447 as an overlay in 2021.

What is the current utilization rate of area code 217?

The current utilization rate of area code 217 is not specified in the provided content.

What is the exhaust projection for area code 217?

The exhaust projection for area code 217 is to be updated, as comprehensive data is not provided.

How does area code 217 support businesses in central Illinois?

Area code 217 supports businesses by providing ample phone numbers through its overlay with area code 447, ensuring reliable telecommunications infrastructure.

What is the role of the North American Numbering Plan in area code 217?

The North American Numbering Plan (NANP) includes area code 217 as part of its system to organize and allocate phone numbers efficiently across North America.

What changes occurred in area code 217 in 2021?

In 2021, area code 447 was introduced as an overlay to area code 217 to meet the growing demand for phone numbers.

Area Code 217: Comprehensive Guide to Central Illinois Coverage

Area code 217 is a vital part of the North American Numbering Plan (NANP), covering central Illinois, including major cities like Springfield, Champaign, and Urbana.

What is Area Code 217?

Area code 217 is a telephone area code in the state of Illinois, primarily serving the central region. It was one of the original area codes established in 1947, and it continues to play a crucial role in the region's telecommunications framework. The overlay with area code 447, introduced in 2021, ensures that there is a sufficient supply of phone numbers.

Geographic Coverage of Area Code 217

Area code 217 encompasses a significant portion of central Illinois, including the state's capital, Springfield. Here are the major cities covered:

Champaign, IL: Latitude 40.11642, Longitude -88.24338
Charleston, IL: Latitude 39.49615, Longitude -88.17615
Danville, IL: Latitude 40.12448, Longitude -87.63002
Decatur, IL: Latitude 39.84031, Longitude -88.9548
Quincy, IL: Latitude 39.9356, Longitude -91.40987
Springfield, IL: Latitude 39.80172, Longitude -89.64371
Urbana, IL: Latitude 40.11059, Longitude -88.20727

Technical Specifications and Implementation

Basic Technical Details

NPA Code: 217
Type: Overlay (with area code 447)
Original Implementation Date: 1947
Overlay Implementation Date: 2021
State: Illinois

Telecommunications Infrastructure

Major Carriers

AT&T
Verizon
T-Mobile

Services Offered

Landline
Wireless
VoIP

Regulatory Framework

The Illinois Commerce Commission oversees the regulation of area code 217. With the introduction of area code 447 as an overlay, ten-digit dialing became mandatory for local calls. This change ensures compliance with NANPA regulations and maintains a steady supply of numbers.

Historical Context of Area Code 217

Key Milestones

1947: Area code 217 was established as one of the original North American area codes.
1951: Boundary adjustments shifted most of the southern portion of Metro East to area code 618.
1956: The northern section merged with part of area code 815 to create area code 309.
2021: Area code 447 was introduced as an overlay to meet growing demand.

Numbering and Utilization

Total Numbers Available: Comprehensive data not provided.
Utilization Rate: Information pending.
Exhaust Projection: To be updated.

Conclusion

Area code 217 remains a cornerstone of telecommunications in central Illinois. The overlay with area code 447 ensures that the region can support its growing population and businesses with ample phone numbers. For more details, you can visit the Illinois Commerce Commission or the official Wikipedia page on area code 217.

This guide provides a detailed overview of area code 217, answering common questions about its coverage, history, and regulatory framework. Whether you're a resident or a business owner in central Illinois, understanding these details can help you navigate the telecommunications landscape effectively.