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US area code · Texas

512 area code

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.

Number holders in area code 512

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 512, shared by 39 companies. The largest holders:

CompanyPrefixesShare
Southwestern Bell27434%
New Cingular Wireless PCS, LLC9812%
T-Mobile USA, Inc.709%
Cellco Partnership Dba Verizon Wireless496%
Level 3 Of Telecom Of Texas, LLC456%
Frontier Southwest Inc Dba Frontier Comm Of Texas375%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 512 numbers

Reports to the FTC, last 30 days
1,018
Recorded messages or robocalls
55%
Rank among area codes
#42 of 670
Most reported subjects
Other (325)
Dropped call or no message (221)
Calls pretending to be government, businesses, or family and friends (184)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

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

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