512 Area Code — Texas
512 is a North American Numbering Plan area code for Texas, the United States. It covers about 2,472,554 people in 48 towns and 134 ZIP codes, including Austin, Round Rock and Georgetown.
| Field | Value |
|---|---|
| Area code | 512 |
| Country | United States (+1) |
| State / province | Texas |
| Type | Shares its towns with 737 |
| Time zone | Central |
| Population covered | 2,472,554 |
| Towns covered | 48 |
| ZIP codes | 134 |
| Approx. centre | 30.357, -97.740 |
Where area code 512 is used
Area code 512 is assigned to Texas, the United States, inside the North American Numbering Plan. Numbers in the code are written (512) NXX-XXXX at home and +1 512 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Other area codes in this footprint: 737. They serve towns in the same territory, so a single street can contain numbers from more than one code. That is normal in the NANP and does not change how you dial.
Towns and cities in area code 512
The 48 towns below are the largest in the 512 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Austin | Travis County | 1,166,827 | 74 |
| Round Rock | Williamson County | 184,922 | 6 |
| Georgetown | Williamson County | 128,203 | 4 |
| Pflugerville | Travis County | 124,834 | 2 |
| Leander | Travis County | 115,121 | 3 |
| Cedar Park | Williamson County | 89,956 | 2 |
| San Marcos | Hays County | 88,583 | 2 |
| Kyle | Hays County | 77,531 | 1 |
| Buda | Hays County | 48,319 | 1 |
| Hutto | Williamson County | 46,413 | 1 |
| Manor | Travis County | 41,291 | 1 |
| Bastrop | Bastrop County | 38,190 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Travis County | 79 |
| Williamson County | 23 |
| Hays County | 8 |
| Bastrop County | 7 |
| Caldwell County | 5 |
| Lampasas County | 3 |
| Milam County | 3 |
| Burnet County | 3 |
| Llano County | 1 |
| Comal County | 1 |
| Guadalupe County | 1 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 512
- Within North America: 512 + 7-digit number (512-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 512, then the 7-digit number — for example 00 1 512 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 512?
512 is a North American Numbering Plan area code assigned to Texas, the United States. It covers about 2,472,554 people in 48 towns.
Is 512 a US or Canadian area code?
512 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 512 in?
Area code 512 is in the Central time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.