- Location
Currently, the “713 area code” serves the central portion of Houston city (including Houston suburban and nearby regions) and is a ‘telephone area code.’ “713,” the first area code for the Houston region, was established in 1947 as one of the ‘four’ NPAs initially allotted to Texas. It originally covered the entire ‘southeastern’ part of Texas, from the Sabine River to the Brazos Valley, including the Houston area.