Area Code 737
Texas
Area code 737 serves Texas, primarily Austin, in the Central Time (CT) time zone. It is an overlay area code sharing territory with area code 512.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 512 (Austin).
In service since: 01-Jul-2013
Demographics & Economics
- Total Population
- 3,794,411
- Population Density
- 223 people/sq miabove U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $97,169above U.S. median (U.S.: $75,144)
- Poverty Rate
- 10.1%below U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 4.2%above U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+45.8%above U.S. average (U.S.: 33.7%)High School or Lower24.4%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the Statistics dashboard.
Time Zone
- Central Time (CT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
TX
Major Cities
- Austin
- Round Rock
- Georgetown
- Cedar Park
- San Marcos
- Leander
- Pflugerville
- Kyle
- Hutto
- Brushy Creek
- Lakeway
- Steiner Ranch
- Manor
- Taylor
- Buda
- Lockhart
- Wells Branch
- Hornsby Bend
- Elgin
- Bastrop
- Lago Vista
- Bee Cave
- Sonterra
- Lampasas
and 59 more cities
History
Area code 737 serves as an overlay for the same territory as area code 512. It was introduced in 2013 to provide additional phone number capacity for the region. It shares its territory with area code area code 512.
Demographics
The estimated population served by area code 737 is approximately 3,794,411. The population density is 223 people per square mile, which is higher than the national average of 93. The median household income is $97,169, which is higher than the national median of $75,144. Approximately 45.8% of adults hold a bachelor's degree or higher, compared to the national rate of 33.7%. This rate is higher than the national average. The poverty rate stands at 10.1%, which is lower than the national rate of 11.5%.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 737).
| County | Population | Share |
|---|---|---|
| Travis, TX | 1,830,155 | 48.2% |
| Williamson, TX | 792,732 | 20.9% |
| Hays, TX | 314,413 | 8.3% |
| Caldwell, TX | 247,325 | 6.5% |
| Bastrop, TX | 176,839 | 4.7% |
| Comal, TX | 103,671 | 2.7% |
| Guadalupe, TX | 91,640 | 2.4% |
| Burnet, TX | 69,036 | 1.8% |
| Blanco, TX | 36,520 | 1.0% |
| Lee, TX | 34,036 | 0.9% |
| Lampasas, TX | 23,994 | 0.6% |
| Milam, TX | 16,504 | 0.4% |
| Llano, TX | 16,289 | 0.4% |
| Burleson, TX | 10,385 | 0.3% |
| Fayette, TX | 10,282 | 0.3% |
| Bell, TX | 8,642 | 0.2% |
| Coryell, TX | 8,642 | 0.2% |
| Mills, TX | 1,653 | 0.0% |
| San Saba, TX | 1,653 | 0.0% |
Area Code 737 Family Tree
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Area code 737 was originally assigned in 01-Jul-2013 to serve TX.
Call Context
This area code covers a geographic region across TX, including Austin and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 737.
Other Area Codes in Texas
Area codes that also serve Texas, linked for easy comparison.