457 Area Code: Northern Louisiana Cities, History & Central Time

Introduction

The 457 area code is the newest telephone prefix in northern Louisiana, introduced as an overlay for the long-serving 318 area code. It spans 17 parishes across the state's northern and central corridor — from Shreveport's riverfront on the Texas border to the agricultural flatlands of the Mississippi Delta.

What makes 457 particularly notable is its place in history: it is Louisiana's first-ever telephone overlay, marking a shift from the seven-digit dialing the region used for decades. Mandatory ten-digit dialing took effect on August 25, 2025, with new 457 numbers entering active service the following month.

Quick answer: The 457 area code covers northern and central Louisiana, activated on September 25, 2025, as the state's first all-services overlay for area code 318. It spans 17 parishes serving Shreveport, Bossier City, Monroe, Alexandria, Ruston, West Monroe, and Natchitoches. The time zone is Central Time (UTC−6 standard, UTC−5 daylight). Existing 318 numbers remain unchanged; all new lines now receive 457.

The 457 area code at a glance

Area code 457 is Louisiana's newest — and historically significant — telephone prefix, approved by the Louisiana Public Service Commission (LPSC) on May 5, 2023. It functions as a full all-services overlay for area code 318 — the same model used when the 447 area code was introduced for central Illinois in 2021, with both codes covering identical territory and no geographic boundary between them.

Every existing 318 number in the region stays exactly as it was. All new lines assigned from September 25, 2025 onward receive 457 numbers. The overlay was introduced because 318's available number pool was projected to reach exhaustion by early 2026 — driven by growth in wireless subscribers, VoIP lines, and IoT-connected devices across the Shreveport-Bossier metro and surrounding parishes.

Northern Louisiana parishes and key cities

The 457 area code stretches across 17 parishes in the northern and central portions of Louisiana.

Additional parishes include Claiborne, Franklin, Jackson, Madison, Morehouse, Richland, Sabine, Union, and West Carroll. The region is home to approximately 1.3 million residents and sits at the heart of the Ark-La-Tex — the cultural and economic zone where Arkansas, Louisiana, and Texas converge.

The economy is anchored by Barksdale Air Force Base in Bossier Parish, home to the Air Force Global Strike Command and one of the most economically significant military installations in the American South. Lumen Technologies, headquartered in Monroe, brings a major telecommunications presence.

Oil and gas fields developed between Shreveport and Monroe remain active, and the Shreveport-Bossier area has grown into a notable film and television production hub, attracted by Louisiana's competitive tax incentives.

Louisiana's first overlay — how 318 ran out and 457 stepped in

Area code 318 is one of Louisiana's original codes, assigned when AT&T launched the North American Numbering Plan in 1947. For nearly eight decades it served all of northern and central Louisiana without needing relief — a span that reflects just how slowly the region's telephone demand grew compared to major metropolitan areas.

The wireless revolution changed that calculus permanently. Mobile lines, internet-connected devices, business VoIP systems, and machine-to-machine communications steadily consumed 318's available prefixes through the 2010s and early 2020s. By 2023, the LPSC determined that exhaustion was imminent and approved the 457 overlay — the first of its kind in Louisiana's history.

Other areas facing the same pressure adopted overlays years earlier. Florida's 448 area code became an overlay for 850 in 2021 when the Florida Panhandle's number pool was exhausted. Louisiana followed the same path, choosing an overlay over a geographic split to protect all existing 318 customers.

Key milestones in the 457 timeline:

• 1947 — Area code 318 assigned to all of Louisiana
• 1995 — Southern Louisiana split off into area code 504; 318 retained for the north
• May 5, 2023 — LPSC approves 457 as Louisiana's first overlay
• February 24, 2025 — Permissive dialing period begins; 10-digit dialing optional
• August 25, 2025 — Mandatory 10-digit dialing takes effect across the region
• September 25, 2025 — New 457 numbers begin active assignment

Dialing into 457 — what changed in August 2025

Because 457 overlays 318 across the same 17-parish territory, ten-digit dialing is mandatory for every call in the region — including calls between two neighbours with the same local exchange.

Time zone: The entire 457 region observes Central Time — Central Standard Time (UTC−6) from November to March and Central Daylight Time (UTC−5) from March to November.

When it is noon in Shreveport or Monroe:

• New York is 1:00 PM (Eastern)
• Denver is 11:00 AM (Mountain)
• Los Angeles is 10:00 AM (Pacific)
• London is 6:00 PM (GMT)

457 versus 318 — same parishes, different era

A call from a Shreveport 318 number to a Monroe 457 number is a local call billed at local rates. Neither code carries more prestige or a different geographic reach — they are identical in every practical sense except the era in which the number was assigned.

Opening doors in northern Louisiana with a 457 number

Northern Louisiana's economy offers three powerful sectors that a 457 number positions your business to serve:

• Defence and aerospace — Barksdale Air Force Base in Bossier City supports tens of thousands of military personnel and civilian contractors; a local 457 number signals immediate regional credibility to the base community and its supply chain
• Energy and telecommunications — active oil and gas operations across the Shreveport-Monroe corridor, combined with Lumen Technologies' Monroe headquarters, create strong demand for B2B services with a local presence
• Higher education — Louisiana Tech University, Grambling State University, LSU Shreveport, and Southern University at Shreveport collectively enrol tens of thousands of students, making the region a strong market for services targeting young professionals and academic institutions
• Film and media production — the Shreveport-Bossier area's growing film industry attracts production companies seeking local vendors, contractors, and support services
• First-mover advantage — as Louisiana's newest area code, 457 is almost entirely unassigned, offering maximum number choice and the advantage of being the region's most current prefix

Just as businesses use the 448 area code to serve Florida's Panhandle without a physical office there, a 457 line routes calls to any device with no Louisiana address required, with call analytics and CRM integration from day one.

Spotting 457 scam calls in the Ark-La-Tex region

Because 457 only entered service in late 2025, many northern Louisiana residents have not yet formed a clear association between the code and a trusted local caller. Scammers exploit this uncertainty by spoofing 457 numbers to appear local to the Shreveport-Bossier and Monroe communities.

Common scam patterns to watch for:

• Government impersonation — callers posing as IRS agents, Social Security Administration officials, or law enforcement demanding immediate payment to avoid arrest
• Neighbour spoofing — the caller ID displays a 457 number matching your own exchange prefix to appear familiar and boost answer rates
• Health insurance fraud — fake agents claiming policy lapses or offering cut-price coverage, targeting retirees and uninsured residents in rural parishes
• Energy bill scams — callers threatening immediate utility disconnection unless payment is made via gift card or wire transfer, common in communities served by rural electric cooperatives
• Military charity fraud — fraudulent fundraising calls exploiting the region's large active-duty and veteran community around Barksdale AFB

If an unexpected 457 caller pressures you for payment, personal information, or account details, hang up immediately and verify the organisation through an official contact number. Report suspected scams to the FTC at reportfraud.ftc.gov.

Key takeaways

• The 457 area code covers northern and central Louisiana — 17 parishes including Caddo (Shreveport), Bossier (Bossier City), Ouachita (Monroe), Rapides (Alexandria), and Lincoln (Ruston)
• It launched on September 25, 2025 as Louisiana's first-ever telephone overlay for area code 318
• 10-digit dialing became mandatory on August 25, 2025 — all calls within the 318/457 region require the full area code
• The region observes Central Time (UTC−6 standard, UTC−5 daylight)
• 457 is almost entirely unassigned, offering the widest number choice available in northern Louisiana
• The regional economy is anchored by Barksdale AFB, Lumen Technologies, oil and gas, and higher education
• Scammers spoof 457 numbers — verify any unexpected caller before sharing personal or financial information

Conclusion

The 457 area code marks a turning point for northern Louisiana telecommunications — the moment a region that relied on a single area code for nearly eight decades finally needed a second. From Shreveport's banks on the Red River to Monroe's technology corridor and the university towns of Ruston and Natchitoches, 457 now shares the Ark-La-Tex's calling identity with 318.

For businesses looking to establish a presence in this defence-anchored, energy-rich, and academically vibrant region, a 457 number is the fastest route to local credibility. My Country Mobile makes it simple to activate a 457 line from anywhere and start connecting with northern Louisiana's 1.3 million residents.

Frequently asked questions