The 457 area code is one of the newest telephone areas codes in the United States. It serves the same geographic region as the 217 area code in central Illinois. The introduction of the area code was necessary because demand for new phone numbers continued to grow with the rise in mobile devices, business lines, and internet-connected services.
What Is the 457 Area Code?
The area code 457 became one of the newest telephone areas codes in the United States when officials officially assigned it to Louisiana and placed it into service on September 25, 2025. As the 478th area code introduced nationwide, it now provides additional phone numbers to meet the growing demand for telecommunications services in the region.
Where Is the 457 Area Code Located?
The 457 phone number area code covers a large portion of central Illinois. It serves many cities, towns, and rural communities throughout the region. The area is known for its agricultural economy, educational institutions, state government offices, and manufacturing industries.
Major cities covered
Major cities and communities served by the 457 area code location include:
The coverage area stretches across dozens of counties, making it one of the most important telecommunications regions in Illinois.
History of the Area Code
The region was originally served exclusively by the 217 area code, which was created in 1947 as one of the original North American area codes. Over time, population growth and the expansion of wireless technology significantly increased the demand for telephone numbers. To prevent shortages of numbers, telecommunications regulators approved the 457 overlay. The new area code officially entered service in 2021, ensuring that residents and businesses would continue to have access to new phone numbers without requiring existing customers to change their numbers.
Parishes and Zip Codes Covered by Area Code
The 457 area code covers a wide swath of Louisiana’s parishes and communities. The area code covers zip codes ranging from 71001 to 71497, encompassing areas across 17 parishes, including Bienville, Bossier, Caddo, Claiborne, DeSoto, East Carroll, Franklin, Jackson, Lincoln, Madison, Morehouse, Ouachita, Richland, Sabine, Union, Webster, and West Carroll. These parishes collectively represent a rich blend of urban centers and rural communities, all now served by both the 318 and 457 area codes under a shared overlay system.
Time Zone
The 457 area code falls within the Central Time Zone, also known as Central Standard Time (CST). This means that residents and businesses in the area code region observe the same time as those in other Central Time states, such as Texas, Arkansas, and Mississippi. When scheduling calls, meetings, or business communications with contacts in the area code, it is important to account for this time zone, which is UTC−6 during standard time and UTC−5 during Daylight Saving Time.
How Does the Overlay System Work?
Before 1992, each area code served a distinct geographic area. If phone numbers in that area code were nearly exhausted, the region would be split into two zones. However, the North American Numbering Plan Administrator (NANPA) began introducing overlay area codes in 1992, which serve the same geographic area as an existing code. The 457 area code follows this model. The 457 overlay did not require existing customers to change their telephone numbers or area codes. Instead, new 457 numbers became available in the same geographic area served by 318.
The Transition to Ten-Digit Dialing
One of the most significant changes that accompanied the introduction of the 457 area code was the requirement for ten-digit dialing for all local calls. Before the overlay, local calls within the 318 area code could generally be completed with seven-digit dialing. The overlay required a transition to ten-digit dialing for local calls. A permissive ten-digit dialing period began February 24, 2025, allowing local calls to be completed with either seven or ten digits. Mandatory ten-digit dialing then began on August 25, 2025, after which local calls using only seven digits would not be completed.
The Area Code and Business Opportunities
The 457 area code represents more than just a technical numbering solution, it also presents meaningful opportunities for businesses looking to establish a local presence in northern and central Louisiana. A virtual phone number with the area code enables businesses to establish a local presence without being physically located in central or northern Louisiana, helping to save costs while still effectively reaching the right local audience.
Frequently Asked Questions (FAQs)
Conclusion
The 457 area code represents the future growth of central Illinois telecommunications. Introduced as an overlay to the long-established 217 area code, it ensures a reliable supply of telephone numbers for residents, businesses, and organizations across the region. Covering major cities such as Springfield, Champaign, Urbana, Decatur, and Quincy, the area code supports a vibrant economy and a growing population.
