The 512 area code is the original phone code for Austin, Texas, the state capital and one of the fastest-growing cities in America. In service since 1947, it now shares the Austin metro with the 737 overlay. If a 512 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 512 at a Glance
| Detail | Information |
|---|---|
| Area Code | 512 |
| State | Texas (TX) |
| Major Cities | Austin, Round Rock, Cedar Park, San Marcos |
| Time Zone | Central Time (CT) |
| Country Code | +1 (USA) |
| Overlay Codes | 737 (co-located) |
Geographic Coverage & Major Cities
Area code 512 covers Austin and the surrounding metro, including Travis, Williamson, and Hays counties in Central Texas. As the founding code of the capital region, it is used across the city and its rapidly expanding suburbs.
Cities and communities served by the 512 area code include:
- Austin – the Texas state capital and a booming tech and music hub
- Round Rock & Georgetown – fast-growing Williamson County suburbs
- Cedar Park & Leander – northwestern metro communities
- San Marcos & Pflugerville – college and commuter cities in the metro
As the original Austin code, a 512 number is prized as a mark of authentic, long-established roots in the capital, much like 713 in Houston or 214 in Dallas.
A Brief History of Area Code 512
Area code 512 was one of the original area codes created in 1947 and once covered a large swath of south-central Texas. In 1992, San Antonio split off into the new 210 code, and other splits followed as the region grew. In 2013, the 737 overlay was added across the Austin area, placing a second code over the same territory and cementing mandatory 10-digit dialing.
Time Zone & Best Time to Call
Numbers in the 512 area code use Central Time (CT). The region observes Daylight Saving Time, shifting from CST (UTC-6) to CDT (UTC-5) between March and November each year.
How to Dial Phone Numbers in Area Code 512
Because 512 is overlaid by 737 across the Austin area, the region requires 10-digit dialing on every call.
Calling within the United States or Canada
- 10-digit dialing: Always include the area code – 512-XXX-XXXX.
- 11-digit dialing: You can also dial 1-512-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 512 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 512 XXX XXXX
- From any mobile phone worldwide: +1 512 XXX XXXX
Is Area Code 512 a Scam? Safety & Protection Tips
Area code 512 is a legitimate Texas area code – a call from it is not fraudulent by default. However, because 512 carries prestige as the original Austin code, scammers frequently spoof it, faking the caller ID so their number appears to come from a trusted local line. Neighbor spoofing, which mimics the first six digits of your own number, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government impersonation | Callers posing as the IRS, SSA, or a “state agency” threatening arrest |
| Bank & card fraud alerts | Claims of “suspicious activity” seeking your account details |
| Utility shut-off threats | Demands for immediate payment to avoid disconnection |
| Tech & job-offer scams | Fake recruiter or “IT department” calls targeting tech workers |
How to report, block, and look up 512 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in Texas
Area code 512 shares and borders several other Texas codes:
- 737 – the overlay that shares the Austin metro with 512 (see our 737 area code guide)
- 210 & 726 – San Antonio, which split from 512 in 1992 (see our 210 area code guide)
- 830 – the Texas Hill Country surrounding the metros
- 254 – Waco and Central Texas to the north
Explore more codes across the state on our Texas area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Texas:
Frequently Asked Questions About Area Code 512
Where is the 512 area code located?
Area code 512 covers Austin and the surrounding Central Texas metro, including Round Rock, Cedar Park, and San Marcos. It operates on Central Time and is overlaid by area code 737.
What is the difference between 512 and 737?
There is no geographic difference. 737 is an overlay covering the exact same Austin-area territory as 512; it was added simply to supply more phone numbers as the region grew.
Is 512 a landline or cell phone area code?
Both. Area code 512 serves landlines, mobile phones, and VoIP numbers throughout the Austin metro.
Should I answer a call from an unknown 512 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 512 Guides
- Is a 512 call safe? Read Is area code 512 a scam? Spam & safety guide.
- Local coverage: see the Austin area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.