737 area code — Austin, TX geographic
Area code 737 is a geographic code serving Austin, Texas in the Central time zone. It has been in service since July 1, 2013. The same territory is also served by its overlay code (512/737 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.
The code currently holds 320 working prefixes, held by 44 different carriers. Of these, 320 are pooled prefixes shared by multiple carriers. Numbers are anchored to 35 rate centers — billing localities that fix where each prefix belongs.
The code was carved out of 512 (2013).
The current NANPA exhaust forecast for the 512/737 complex is 1Q 2044.
Local calls inside 737 are dialed 10D.
Use this page to decode where 737 numbers come from — and remember that spoofing means the screen can lie about everything except your own caution.
Largest localities in 737
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Austin | 147 | 512 |
| Georgetown | 19 | 512 |
| Bastrop | 18 | 512 |
| San Marcos | 13 | 512 |
| Kyle | 10 | 512 |
| Leander | 10 | 512 |
| Elgin | 9 | 512 |
| Taylor | 8 | 512 |
| Lockhart | 6 | 512 |
| Lampasas | 6 | 512 |
FAQ
Will 737 run out of numbers?
NANPA's current forecast projects exhaust in 1Q 2044 — decades of capacity remain.
Why am I getting spam calls from 737 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 737 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 737 number from?
737 is assigned to Austin and surrounding areas of Texas in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.