Area codes · +1
Area code 337
Area code 337 is centred on Lafayette, Louisiana. We hold 4,379 allocated blocks for it across 75 rate centres, split 44% mobile, 41% landline and 15% VoIP.
The towns inside area code 337
Area code 337 is not a city code. It covers 75 separate rate centres — billing areas, each its own local calling zone. The largest of them are named in the table below.
That matters twice over. A call between two 337 numbers is not necessarily a local call, because they can sit in different rate centres. And a code this wide narrows a subscriber to a region rather than a town.
Louisiana is split across 5 area codes — 318, 337, 504, 225, 985. By allocated blocks 337 is the second largest of them, holding 20% of the Louisiana total.
Where 337 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Lk Charles and Stmartinvl are 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 337 |
|---|---|---|
| Lafayette | 906 | 21% |
| Lk Charles | 451 | 10% |
| New Iberia | 226 | 5% |
| Opelousas | 169 | 4% |
| Leesville | 154 | 4% |
| Abbeville | 143 | 3% |
| Crowley | 134 | 3% |
| De Ridder | 119 | 3% |
| Sulphur | 97 | 2% |
| Jennings | 93 | 2% |
| Eunice | 87 | 2% |
| Stmartinvl | 76 | 2% |
| Broussard | 75 | 2% |
| Breaux Bdg | 74 | 2% |
| Carencro | 71 | 2% |
| Rayne | 63 | 1% |
| Youngsvl | 60 | 1% |
| Jeanerette | 59 | 1% |
| Baldwin | 58 | 1% |
| Vl Platte | 56 | 1% |
| Gueydan | 55 | 1% |
| Centervl | 52 | 1% |
| Franklin | 45 | 1% |
| Carlyss | 44 | 1% |
51 further rate centres in 337 hold fewer blocks than these.
Carriers holding the most 337 blocks
AT&T Wireless852 blocks
Onvoy542 blocks
Bellsouth Telecomm Inc Dba South Central Bell Tel373 blocks
T-Mobile USA, Inc.274 blocks
Verizon Wireless247 blocks
Bandwidth219 blocks
The largest holder, AT&T Wireless, has 19% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 337 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 337 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 337?
Area code 337 is centred on Lafayette, Louisiana and spans 75 rate centres, so it covers a region rather than a town.
Is a 337 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 337 the split runs 44% mobile, 41% landline and 15% VoIP, so mobile is the most likely single answer.
Which carriers hold 337 numbers?
The largest holders are AT&T Wireless, Onvoy, Bellsouth Telecomm Inc Dba South Central Bell Tel. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 337 numbers are there?
The code holds 4,379 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 337 covers on the order of 4,379,000 possible numbers — most of which have never been issued to anyone.