Austin is served by 2 active area codes as of 2026, layered through decades of overlays and splits across the metro area. This guide walks through which code covers which part of the region, why so many codes are needed, and what new codes may come next.
The Short Answer
Austin currently has 2 active area codes in service. The count reflects a combination of population growth, the rise of mobile lines, and the way modern numbering allocates blocks — every line activated, whether a cellphone, a business desk line, a VoIP number, or a connected device, consumes a slot in the pool.
Austin has roughly 2,550,637 residents as of the most recent estimates. That population, combined with the spread of mobile and VoIP lines per household, determines how often new area codes are needed.
The Full List of Austin Area Codes
The active area codes serving Austin are listed below, in numerical order. Where a code is an overlay or a split-off from an earlier code, that relationship is noted.
- 512 — Austin and the surrounding Central Texas counties (Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, and parts of Milam)
- 737 — Austin metro (overlay of 512)
How Austin’s Area Codes Grew Over Time
Austin received its first area code, 512, when the North American Numbering Plan launched in 1947. That single code initially covered the entire state, and subsequent splits and overlays narrowed it over the decades that followed.
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Browse Austin Area Codes →- 1947 — 512 assigned as one of the original North American Numbering Plan area codes in October 1947, covering most of south-central Texas from the Gulf of Mexico to the Mexican border, including Austin, San Antonio, Corpus Christi, and the Rio Grande Valley.
- 1992 — 210 split off from 512 for San Antonio and the Rio Grande Valley; Austin kept 512 rather than San Antonio, the larger city, to spare state government agencies the cost of changing letterheads and business cards.
- 1999 — 361 split off from 512 on February 13, 1999, taking the southern portion including Corpus Christi and reducing 512 to roughly its current Central Texas footprint.
- 2013 — 737 introduced as an overlay of 512 in July 2013 to stave off number exhaustion; ten-digit dialing across the 512 territory became mandatory in June 2013.
What’s Next for Austin Area Codes
The 512/737 overlay was created in 2013 to relieve pressure on the original 512 numbering pool, and the pairing has provided substantial headroom since. NANPA’s recent NPA exhaust projections do not place the 512/737 complex on the near-term relief schedule, though continued strong population growth in the Austin metro makes a future third overlay plausible later this decade if assignment rates climb. No additional relief for the Austin area is currently projected within the next several years.
Frequently Asked Questions
How many area codes does Austin have right now?
Austin has 2 active area codes in service across the territory it covers, including any overlays that share geography with an older code.
What is the oldest area code in Austin?
512 is the oldest active area code in Austin, assigned in 1947 when the North American Numbering Plan launched. It remains in service today, though its geographic footprint has typically been reduced by subsequent splits and overlays.
What is the newest area code in Austin?
The most recent area code addition to Austin was 737, activated in 2013. New phone lines provisioned in its service area are increasingly drawn from this code as older overlays approach exhaustion.
Why does Austin need so many area codes?
Population growth combined with the proliferation of mobile lines, business direct-dial numbers, VoIP services, and connected devices has exhausted older codes faster than the original 1947 plan anticipated. Each new area code adds roughly 7.9 million additional phone numbers to the regional pool.
How many area codes does Austin have?
Austin has two area codes: 512 and 737. They function as an overlay, meaning both serve the same geographic territory rather than dividing it. Any new phone line in the Austin metro may be assigned either code, so ten-digit dialing is required for all local calls.
Is 512 or 737 the original Austin area code?
512 is the original. It was one of the area codes established at the launch of the North American Numbering Plan in 1947 and once covered a large swath of south-central Texas. 737 is much newer, added in 2013 as an overlay once 512 numbers began running low.
Why does Austin need two area codes?
Rapid population growth in the Austin metro exhausted the available number blocks in 512, so 737 was overlaid on the same area in 2013 to expand the supply. An overlay adds new numbers without forcing existing customers to change their area code.
Do I have to dial the area code for local calls in Austin?
Yes. Because 512 and 737 share the same territory as an overlay, all local calls in the Austin area require ten-digit dialing (area code plus the seven-digit number). This has been mandatory since the 737 overlay took effect in 2013.
Ready to Get a Number in Austin?
We carry available Austin numbers right now across multiple area codes. Order directly in 512 or 737 — a one-time fee, no monthly charges, with pricing From $150 depending on the digit pattern and memorability of the number. Prefer help choosing? Call us at (212) 580-2000.
Related Reading
- How Many Area Codes Are in Texas
- Area Code 512: Austin, Texas Coverage & History
- How Many Area Codes Are in the US
- How Do Area Codes Work
- How Are Area Codes Assigned
- Who Invented Area Codes
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