The 504 area code covers New Orleans, Kenner and 2 more places in Louisiana.
Area code 504 is in Louisiana, on Central Time. In the 504 area, phone numbers are given out most in Orleans Parish, then Jefferson Parish and Plaquemines Parish. It has been in service since 1947.
- Where
- Orleans Parish, Jefferson Parish and Plaquemines Parish, Louisiana
- Time zone
- Central Time
- In service since
- 1947, one of the original area codes
- Shares its area with
- No other area code
- Prefixes in use
- 561
- How to dial
- Local calls need all 10 digits: 504-555-0142.
Find out who called you from a 504 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (504) number is on today, use our free carrier lookup.
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New Orleans holds 77% of the phone prefixes in area code 504.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 561 prefixes in use shows where 504 numbers are actually given out.
- New Orleans433 prefixes, 77%
- Kenner100 prefixes, 18%
- Lafitte13 prefixes, 2%
- Venice6 prefixes, 1%
BellSouth (AT&T) holds the most phone number prefixes in area code 504: 217 of 561.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 561 prefixes in use in 504 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| BellSouth (AT&T)AT&T's landline company | 217 | 39% |
| T-MobileMobile network | 81 | 14% |
| AT&T MobilityMobile network | 48 | 9% |
| SpokPaging network | 25 | 4% |
| Level 3 (Lumen)Lumen's business and wholesale network | 23 | 4% |
| PAETEC (Windstream)Windstream's business phone network | 16 | 3% |
| 30 other carriers | 151 | 27% |
66% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
504 has been split 2 times since 1947.
1947
504 is one of the original North American area codes.
1998
On August 17, 1998, 225 splits off and takes part of the 504 area.
2001
On February 12, 2001, 985 splits off and takes part of the 504 area.
A 504 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 504 are 985, 228 and 225.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Louisiana has 5 other area codes.
These are the questions people ask most about area code 504.
Where is area code 504?
504 covers New Orleans, Kenner, Lafitte and Venice in Louisiana. In the 504 area, phone numbers are given out most in Orleans Parish, then Jefferson Parish and Plaquemines Parish.
What state is area code 504 in?
Louisiana. 504 is a Louisiana area code on Central Time.
What cities use area code 504?
The places holding the most 504 prefixes are New Orleans, Kenner, Lafitte and Venice. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 504?
No single phone company owns 504. NANPA's records show BellSouth (AT&T) holds the most 504 prefixes, 217 of 561, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 504 in?
504 is on Central Time.
When did area code 504 start?
504 is one of the original North American area codes, in service since 1947.
How do I dial a 504 number?
Local calls need all 10 digits: 504-555-0142.
Is 504 a toll-free number?
No. 504 is a regular area code for New Orleans and Kenner in Louisiana, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 504?
The closest are 985 (Houma, Louisiana), 228 (Biloxi, Mississippi), 225 (Baton Rouge, Louisiana) and 601/769 (Jackson, Mississippi), measured between the centres of each area.
Who called me from a 504 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 504 a scam?
504 is a real Louisiana area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.