Area code 512 serves central Texas, including the state capital Austin and surrounding cities like Round Rock, San Marcos, and Georgetown. It is one of the original area codes created in 1947 and originally covered a much larger portion of south-central Texas. Due to rapid growth, area code 737 was added as an overlay in 2013, making ten-digit dialing mandatory. Austin, known for its tech industry, music scene, and political influence, anchors the 512 region. The area code is closely tied to the city's identity and is frequently used in branding, business, and local culture. 512 remains one of the most recognized area codes in Texas.