Area codes · +1
Area code 737
Area code 737 is centred on Austin, Texas. We hold 3,470 allocated blocks for it across 35 rate centres, split 47% mobile, 29% landline and 25% VoIP.
The other area codes laid over 737
Area code 737 does not have Austin to itself. 1 other code — 512 — serves the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
5126,021 blocks, 36 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 737 number and a 512 number from the same street can report different line types. Filtering Austin by area code needs all 2 of them.
737 is not confined to Austin itself: its blocks sit across 35 rate centres, named in the table below.
Texas is split across 28 area codes — 346, 832, 469, 210, 956, 737 and others. By allocated blocks 737 is the 20th largest of them, holding 3% of the Texas total.
Where 737 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Drippngspg and Liberty Hl 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 737 |
|---|---|---|
| Austin | 1,678 | 48% |
| Georgetown | 213 | 6% |
| Bastrop | 194 | 6% |
| San Marcos | 138 | 4% |
| Kyle | 106 | 3% |
| Leander | 106 | 3% |
| Elgin | 89 | 3% |
| Taylor | 85 | 2% |
| Buda | 68 | 2% |
| Lampasas | 61 | 2% |
| Lockhart | 60 | 2% |
| Burnet | 52 | 1% |
| Wimberley | 50 | 1% |
| Drippngspg | 46 | 1% |
| Rockdale | 45 | 1% |
| Hutto | 41 | 1% |
| Bertram | 40 | 1% |
| Smithville | 37 | 1% |
| Granger | 28 | 1% |
| Liberty Hl | 25 | 1% |
| Jarrell | 24 | 1% |
| Martindale | 24 | 1% |
| Fentress | 22 | 1% |
| Lometa | 21 | 1% |
11 further rate centres in 737 hold fewer blocks than these.
Carriers holding the most 737 blocks
Onvoy782 blocks
AT&T Wireless527 blocks
Verizon Wireless352 blocks
T-Mobile USA, Inc.288 blocks
T-Mobile Usa, Inc.243 blocks
Bandwidth227 blocks
The largest holder, Onvoy, has 23% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 737 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 737 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 737?
Area code 737 covers Austin, Texas. It is not the only code there: 512 is an overlay on the same rate centres, so a Austin, Texas number can start with any of them.
Is a 737 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 737 the split runs 47% mobile, 29% landline and 25% VoIP, so mobile is the most likely single answer.
Which carriers hold 737 numbers?
The largest holders are Onvoy, AT&T Wireless, Verizon Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 737 numbers are there?
The code holds 3,470 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 737 covers on the order of 3,470,000 possible numbers — most of which have never been issued to anyone.