737 area code
Austin area, Central Time.Area code 737 covers Austin, Georgetown, Bastrop and 32 more places in Texas, on Central Time. 512 covers the same area.
Right now in Austin
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM (Texas law)
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Where 737 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 737 has 35. Each one's share is how many 737 numbers start there. Its biggest metro area is Austin-Round Rock-San Marcos, TX.
- Austin46%
- Georgetown6%
- Bastrop6%
- San Marcos4%
- Leander3%
- Kyle3%
- Elgin3%
- Taylor2%
Also: Lockhart, Lampasas, Buda, Burnet, Rockdale, Wimberley, Dripping Springs, Smithville, Bertram, Hutto, Jarrell, Liberty Hill + 15 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 737 number?
Sales calls to homes and cell phones have legal hours, set by Texas law. Hold every 737 number to them, since you can't tell a work line from a personal cell.
What applies to 737Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- Texas lawMon to Sat, 9 AM to 9 PM · Sun, noon to 9 PMCalls to residences.Tex. Bus. & Com. Code 301.051(b)(2) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
737 and 512
737 went into service on July 1, 2013. 737 and 512 cover the same area, so new numbers can get either code and neighbors can have different area codes. 737 holds 29% of the area's exchanges; 512 holds the most. Local calls take all 10 digits.
- 1947512 overlay
- 2013737 starts
Source: NANPA area code database
Calling a list of 737 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
737 area code FAQ
What area code is 737?
737 is a Texas area code for Austin, Georgetown, Bastrop, San Marcos and 31 more places.
What time zone is the 737 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 512 the same as 737?
Same area, different code. 737 and 512 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 737 numbers?
Mon to Sat, 9 AM to 9 PM · Sun, noon to 9 PM, local time, under Texas law.
When did the 737 area code start?
On July 1, 2013.
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