North American area codes 430 and 903 are state of Texas telephone area codes for numbers in the Northeast Texas area, including Texarkana, Tyler, and Sherman. Area code 903 was created November 4, 1990 as a split from area code 214. Area code 430 was created February 15, 2003, as an overlay for area code 903. The 903/430 overlay region begins just north and east of the Dallas–Fort Worth metroplex and extends to the Oklahoma, Arkansas, and Louisiana borders.