The 737 area code covers the same area as 512, including Austin, Georgetown and 29 more places in Texas.
Area code 737 is in Texas, on Central Time. In the 737 area, phone numbers are given out most in Travis County, then Williamson and Hays counties. It has been in service since July 1, 2013. 512 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Texas, mostly Travis County, Williamson County and Hays County
- Time zone
- Central Time
- In service since
- July 1, 2013
- Shares its area with
- 512 (since 1947)
- Prefixes in use
- 332
- How to dial
- Local calls need all 10 digits: 737-555-0142.
Find out who called you from a 737 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 (737) number is on today, use our free carrier lookup.
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Austin holds 46% of the phone prefixes in area code 737.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 332 prefixes in use shows where 737 numbers are actually given out.
- Austin154 prefixes, 46%
- Georgetown21 prefixes, 6%
- Bastrop19 prefixes, 6%
- San Marcos13 prefixes, 4%
- Kyle10 prefixes, 3%
- Leander10 prefixes, 3%
- Elgin9 prefixes, 3%
- Taylor8 prefixes, 2%
Also served: Kyle, Rockdale, Lampasas and Buda and 19 smaller places.
Of the carriers named here, T-Mobile holds the most phone number prefixes in area code 737: 33 of 332.
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 332 prefixes in use in 737 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| T-MobileMobile network | 33 | 10% |
| AT&T MobilityMobile network | 29 | 9% |
| Fractel | 26 | 8% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 21 | 6% |
| Teleport (AT&T)AT&T's business phone network | 14 | 4% |
| Ton80 Communications | 9 | 3% |
| 38 other carriers | 200 | 60% |
100% 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.
737 started in 2013 as an overlay on 512, and its ground has not changed since.
2013
737 starts on July 1, 2013, as an overlay on 512: new numbers on the same ground.
A 737 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 737 are 210, 254 and 979.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Texas has 28 other area codes.
These are the questions people ask most about area code 737.
Where is area code 737?
737 covers Austin, Georgetown, San Marcos and Bastrop and 27 more places in Texas. In the 737 area, phone numbers are given out most in Travis County, then Williamson and Hays counties.
What state is area code 737 in?
Texas. 737 is a Texas area code on Central Time.
What cities use area code 737?
The places holding the most 737 prefixes are Austin, Georgetown, San Marcos, Bastrop, Leander, Lockhart, Burnet and Taylor, out of 31 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 737?
No single phone company owns 737. NANPA's records list its 332 prefixes across many carriers, and the ones named on this page include T-Mobile, AT&T Mobility and Fractel. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 737 in?
737 is on Central Time.
When did area code 737 start?
737 went into service on July 1, 2013, as an overlay on 512: new numbers for the same area.
Is 737 the same area as 512?
Yes. 512 (since 1947) covers the same ground as 737. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 737 number?
Local calls need all 10 digits: 737-555-0142.
Is 737 a toll-free number?
No. 737 is a regular area code for Austin and Georgetown in Texas, 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 737?
The closest are 210/726 (San Antonio, Texas), 254 (Waco, Texas), 979 (Bryan, Texas) and 830 (New Braunfels, Texas), measured between the centres of each area.
Who called me from a 737 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 737 a scam?
737 is a real Texas 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.