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US area code · Texas

Area code 512

Where the 512 area code is, its overlay and how to dial a +1 512 number from anywhere.

CoversAustin, TexasTime zoneCentral (CT)TypeOverlay
Quick answer

The 512 area code is in Austin, Texas, United States (Central (CT)). To call from abroad: +1 512 555-0123. It is an overlay, so all 10 digits are dialled.

StateTexas
Main areaAustin
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1947

The 512 area code is a geographic North American Numbering Plan (NANP) code covering Austin, Texas. It has been in service since 01-Jan-1947 and sits in the Central (CT) time zone.

Overlay 512 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

512737

How to dial a 512 number

From abroad+1 512 555-0123
Within the US / Canada1 512 555-0123
Locally (same area)512 555-0123

Cities in the 512 area code

A 512 number is usually in one of these places in Texas — 3 counties.

Austin Hays;Travis;WilliamsonCedar Park WilliamsonGeorgetown WilliamsonRound Rock WilliamsonSan Marcos Hays

Other Texas area codes

210214254281325346361409430432469621682713726737

Frequently asked questions

Where is the 512 area code?

The 512 area code is in Austin, Texas, United States (Central (CT)).

Is 512 an overlay area code?

Yes. 512 overlays the same region as 737, so callers dial all 10 digits.

Do I have to dial 10 digits for 512?

Yes — dial the area code plus the seven-digit number.

How do I call a 512 number from another country?

Dial your exit code (or +), then 1, then 512, then the number: +1 512 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 512 number does not pinpoint a street or ZIP code.

Missed a call from +1 512?

In the 30 days to September 24, 2026, 1,018 unwanted calls showing a 512 number were reported to the US Federal Trade Commission, 55% of them recorded messages or robocalls. That puts 512 at #42 of 670 area codes reported.

Other325
Dropped call or no message221
Calls pretending to be government, businesses, or family and friends184
Medical & prescriptions119
Before you call back
  • If you do not know anyone in Texas, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 512 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 512 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 512:

Southwestern Bell 274New Cingular Wireless PCS, LLC 98T-Mobile USA, Inc. 70Cellco Partnership Dba Verizon Wireless 49Level 3 Of Telecom Of Texas, LLC 45Frontier Southwest Inc Dba Frontier Comm Of Texas 37

About 27.3% of the 800 prefixes in use belong to mobile carriers: a 512 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 512 — cities & rate centres