Area code 737 is an overlay for 512, covering the Austin metropolitan area in central Texas. Introduced in 2013, it supports the explosive growth of Austin, one of the fastest-growing cities in the U.S. Known for its music scene, tech startups, the University of Texas, and state government, Austin is a national hotspot for innovation and culture. Ten-digit dialing is required. While 512 remains the older and more prestigious code, 737 is now common across mobile devices and new business lines, reflecting the modern wave of change sweeping through the Austin area.