Area code 512 covers Austin and surrounding areas in Texas. It is one of the original 86 area codes established by AT&T in 1947. Today it shares its territory with overlay code 737. For the full picture, see all Texas area codes.
| State | Texas |
|---|---|
| Primary city | Austin |
| Cities also served | Austin, Round Rock, Georgetown, San Marcos, Cedar Park, Kyle, Leander, Bastrop |
| Time zone | Central (UTC-6 / UTC-5 DST) |
| Year established | October 1947 |
| Original 1947 NPA? | Yes |
| Overlay codes | 737 |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
History of Area Code 512
Area code 512 is one of the 86 original area codes created by AT&T in 1947, when the first nationwide numbering plan went into effect on January 1 of that year. It was assigned to Texas as part of the initial map that divided the United States and Canada into geographic dialing regions.
Since its activation, the geographic area covered by 512 has been reshaped by the following splits:
- 1992 — area code 210 split off to cover The western portion of 512, including San Antonio, was split off to create area code 210. Austin retained the 512 code to spare the state government the disruption of a code change.
- 1999 — area code 361 split off to cover On February 13, 1999, the southern coastal portion of 512, including Corpus Christi, was split off into area code 361, reducing 512 to its current Central Texas footprint.
Overlay codes have been added to the same geographic territory in:
- 2013 — area code 737 activated as an overlay
Cities and Areas Served by 512
Area code 512 serves Austin metropolitan area and surrounding Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, and Milam counties, including the following cities and communities:
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Browse 512 Numbers →- Austin
- Round Rock
- Georgetown
- San Marcos
- Cedar Park
- Kyle
- Leander
- Bastrop
Nearby area codes covering the same broader region include: 737, 210, 361, 830, 254, 979.
Overlay Codes 512
Area code 737 shares the same geographic territory as 512 (added in 2013). New phone numbers in the region may be assigned either code.
Because multiple area codes serve the same area, ten-digit dialing is mandatory for all local calls. A call from any of these codes originates from the same geographic region in Texas.
The Cultural Weight of a 512 Number
Area code 512 was established in October 1947 as one of the original 86 area codes created under the North American Numbering Plan, and it initially covered a vast swath of south-central Texas — from the Gulf of Mexico to the Mexican border — encompassing cities that would later become San Antonio, Corpus Christi, Brownsville, and McAllen. When population growth forced the first split in 1992, Austin’s status as the state capital gave it an unusual advantage: rather than following the standard practice of assigning the original code to the largest city (which would have been San Antonio), regulators allowed Austin to keep 512 so that state government agencies would not have to update physical letterheads, business cards, and official records at great public expense. A second split in February 1999 carved Corpus Christi into area code 361. By the early 2010s, Austin’s explosive growth as a technology hub and state capital drove 512 toward exhaustion, and on July 1, 2013, area code 737 was introduced as an all-services overlay, with ten-digit dialing mandatory since June 2013. Today 512 remains the parent NPA in the 512/737 overlay complex, serving the Austin metropolitan area across Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, and Milam counties.
The 512 area code has become inseparable from Austin’s identity as the self-proclaimed Live Music Capital of the World and the tech corridor dubbed Silicon Hills. The code appears in the name of local event guide Do512.com, which covers music festivals including South by Southwest (SXSW) — the annual convergence of music, film, and interactive media that has launched careers and drawn global audiences to Austin since 1987 — and the Austin City Limits Music Festival. Austin’s live music fabric runs through storied venues such as the Continental Club, opened in 1955, and Antone’s, known as the Home of the Blues, both of which hosted Stevie Ray Vaughan and shaped the city’s blues and rock legacy. Willie Nelson, long identified with Austin, helped launch the outlaw country movement here in the 1970s. The area code also entered pop culture through Selena Quintanilla’s 1995 single ‘El Chico del Apartamento 512,’ a reference to Corpus Christi’s former area code. On the sports side, the University of Texas Longhorns — whose football and basketball programs fill Darrell K Royal–Texas Memorial Stadium and the Moody Center in the 512 — are the dominant sports institution in the region. Major employers anchored in the 512 zone include Dell Technologies (headquartered in Round Rock), Apple, Tesla, and Oracle, all contributing to Silicon Hills’ standing as one of the nation’s fastest-growing tech economies. A 512 number remains a badge of long-standing Austin roots — a distinction that carries real social weight as newer arrivals are increasingly assigned the 737 overlay.
How to Get a Phone Number with Area Code 512
There are three ways to get a phone number with the 512 area code, each suited to a different need:
- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 512 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 512 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 512 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 512 number. If you already have a 512 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Texas sometimes can’t accept inbound ports of 512 numbers due to 911 routing rules.
Looking for a 512 number? 212areacode.com offers premium 512 numbers for Austin, Texas — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 512 numbers →
Frequently Asked Questions
Is the 512 area code still in use?
Yes. 512 is actively assigned to new phone lines in Austin metropolitan area and surrounding Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, and Milam counties.
What is the difference between 512 and 737?
Today they share the same geographic territory in Texas. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.
Can I get a 512 number if I don't live in Texas?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 512 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 512 a scam area code?
No. 512 is a legitimate, active area code for Austin metropolitan area and surrounding Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, and Milam counties. Like any area code, scammers occasionally spoof 512 caller IDs, but the code itself is heavily used by real Texas businesses, government offices, and residents.
Why did Austin keep the 512 area code instead of San Antonio after the 1992 split?
Normally the largest city retains the original code, which would have given 512 to San Antonio. However, regulators made an exception because Austin is the state capital, and reassigning the code would have forced all state government agencies to update official documents, letterheads, and business cards at significant public expense. San Antonio received the new 210 code instead.
When did area code 737 become an overlay to 512, and what does that mean for dialing?
Area code 737 was put into service on July 1, 2013, as an all-services overlay covering the identical geographic territory as 512. Because two different area codes now serve the same region, ten-digit dialing (area code + seven-digit number) has been mandatory for all local calls since June 2013.
What cities are included in the 512 area code today?
The 512/737 overlay complex serves the Austin metropolitan area, including Austin, Round Rock, Georgetown, San Marcos, Cedar Park, Kyle, Leander, Bastrop, Pflugerville, Hutto, Taylor, Lockhart, Burnet, and Lampasas, across roughly twelve counties in Central Texas.
Is a 512 number different from a 737 number in terms of location or service?
No. Both 512 and 737 cover exactly the same geographic territory. The only practical difference is that 512 is the older, original code and carries significant local identity — many Austin residents and businesses prize 512 numbers as a sign of established roots in the city. New numbers in the region are now more frequently assigned the 737 prefix as 512 capacity fills.
