The 457 area code is an overlay serving Greater New Orleans in southeastern Louisiana. Introduced in 2023, it was layered directly on top of the established 504 area code to supply fresh phone numbers across the New Orleans metropolitan core.
Quick Summary of the 457 Area Code
| Area Code | 457 |
| State | Louisiana (LA) |
| Region | Greater New Orleans |
| Major Cities | New Orleans, Metairie, Kenner, Chalmette, Gretna, Marrero, Harvey, Terrytown |
| Time Zone | Central Time (CT) – CST / CDT |
| Dialing Format | 10-digit dialing required |
Geographic Coverage
The 457 area code shares an identical footprint with 504, covering the city of New Orleans, the Jefferson Parish suburbs of Metairie and Kenner, the West Bank communities of Gretna, Marrero, Harvey, and Terrytown, and St. Bernard Parish including Chalmette. Because it is an overlay rather than a separate region, a 457 number and a 504 number can exist on the same street.
Time Zone
The 457 area code observes Central Time (CT) – CST / CDT. Clocks follow Central Standard Time (UTC−6) in winter and shift to Central Daylight Time (UTC−5) from mid-March through early November. All of Louisiana is on Central Time. From the West Coast, this region is two hours ahead of Pacific Time, so a 9:00 AM call in California reaches this number at 11:00 AM local time.
Tip: Business hours across the 457 region generally run 9:00 AM to 5:00 PM local time, Monday through Friday.
How to Dial a 457 Number
Because area code 457 operates as part of an overlay, 10-digit dialing is mandatory for every local and long-distance call. You must dial the full 10-digit number (457 + the seven-digit line number) even when calling a neighbor across the street. For international callers, dial your country’s exit code, then +1 (the North American country code), then 457, followed by the seven-digit local number.
Scam Alerts for the 457 Area Code
Like every U.S. area code, 457 has been used by scammers who spoof local numbers to appear trustworthy. Residents in New Orleans, Metairie, Kenner, Chalmette, Gretna, Marrero, Harvey, Terrytown should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Threatening calls demanding immediate tax payment via gift cards or wire transfer. |
| Utility Shut-off | Impostors claiming to be Entergy New Orleans threatening to cut power. |
| Storm Repair Scam | Fake contractors demanding upfront payment for hurricane or flood damage repairs. |
| Tech Support Fraud | Pop-ups or calls claiming your computer is infected and asking for remote access. |
If you receive a suspicious call from a 457 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the Louisiana Attorney General’s Office.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (Entergy New Orleans) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 457 caller making such a demand is a scammer.
History and Economy of the 457 Region
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The 457 area code entered service in 2023 as an overlay for the entire 504 region. Overlays let regulators add a fresh supply of phone numbers without forcing existing customers to change their established numbers, so 457 covers precisely the same cities as 504. The regional economy is famous for tourism – the French Quarter, Mardi Gras, jazz, and Creole and Cajun cuisine – and is also a major shipping and industrial center anchored by the Port of New Orleans, along with oil and gas, healthcare, and higher education at Tulane and Loyola universities. Because 457 is the newer of the two New Orleans codes, it appears most often on recently activated mobile numbers and new business lines.
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Looking Up a 457 Number
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To identify a 457 caller, use a reverse phone lookup or search the complete 10-digit number online. Because 457 is a newer code often used for mobile numbers, some callers may have a smaller public footprint, so never share personal or financial details with an unverified caller.
Nearby & Related Area Codes
Louisiana is served by several area codes. If you are researching 457, these neighboring and overlay codes are worth knowing:
- 504 – Greater New Orleans (overlay partner)
- 985 – Northshore & Southeast Louisiana
- 225 – Baton Rouge Metro
You can also browse our full directory of Louisiana area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Louisiana:
Frequently Asked Questions
Where is the 457 area code located?
The 457 area code serves Greater New Orleans as an overlay of 504, covering the city of New Orleans, Metairie, Kenner, Chalmette, Gretna, Marrero, and Harvey.
Why does 457 cover the same area as 504?
457 is an overlay added in 2023 because the 504 region ran short of available phone numbers. Both codes serve the exact same geographic area.
Do I have to dial 10 digits for 457?
Yes. Overlay area codes like 457 always require 10-digit dialing for local calls.
Is 457 a new area code?
Yes. Introduced in 2023, 457 is one of the newest area codes in Louisiana and observes Central Time (CST/CDT).
Related 457 Guides
- Worried about spam or robocalls? Browse our Scam Alerts directory.