Area codes · +1
Area code 504
Area code 504 covers New Orleans. We hold 4,261 allocated blocks for it across 6 rate centres, split 46% mobile, 43% landline and 12% VoIP.
How far area code 504 reaches
Area code 504 covers 6 rate centres, so two 504 numbers are not always a local call to each other.
A rate centre is a billing boundary rather than a postal one, which is why an area code can span several and a single city can contain many. It is also why the code alone cannot place a subscriber beyond a rough region.
Louisiana is split across 5 area codes — 318, 337, 504, 225, 985. By allocated blocks 504 is the third largest of them, holding 19% of the Louisiana total.
Where 504 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Xxxxxxxxxx is shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.
| Rate centre | Blocks | Share of 504 |
|---|---|---|
| Neworleans | 3,002 | 70% |
| Kenner | 949 | 22% |
| Lafitte | 143 | 3% |
| Jesuitbend | 86 | 2% |
| Venice | 62 | 1% |
| Xxxxxxxxxx | 2 | 0% |
Carriers holding the most 504 blocks
Bellsouth Telecomm Inc Dba South Central Bell Tel702 blocks
Voicestream Gsm I, Llc570 blocks
T-Mobile USA, Inc.538 blocks
Onvoy403 blocks
AT&T Wireless307 blocks
Bandwidth295 blocks
The largest holder, Bellsouth Telecomm Inc Dba South Central Bell Tel, has 16% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 504 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 504 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 504?
Area code 504 covers New Orleans, spanning 6 rate centres.
Is a 504 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 504 the split runs 46% mobile, 43% landline and 12% VoIP, so mobile is the most likely single answer.
Which carriers hold 504 numbers?
The largest holders are Bellsouth Telecomm Inc Dba South Central Bell Tel, Voicestream Gsm I, Llc, T-Mobile USA, Inc.. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 504 numbers are there?
The code holds 4,261 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 504 covers on the order of 4,261,000 possible numbers — most of which have never been issued to anyone.