Area codes 903 and 430

Area codes 903 and 430 are telephone area codes in the North American Numbering Plan (NANP) for the northeastern part of the U.S. state of Texas, including Kilgore, Texarkana, Tyler, and Sherman.

The numbering plan area begins just north and east of the Dallas–Fort Worth metroplex, and extends to the Oklahoma, Arkansas, and Louisiana state borders.

From 1962 until October 18, 1980, area code 903 was an area code for parts of northwestern Mexico served by Telefónica Fronteriza, which homed on AT&T lines in the United States rather than Telefonos de Mexico (Telmex).

Telmex and the Mexican government forcibly acquired the TF exchanges, and in 1980, Telmex reorganized the area codes of the country, assigning 6 as the initial digit of 8-digit numbers in the northwest.

In February 1991, 706 and 905 were withdrawn pending assignment within the NANP service area.

Area code 806 Area code 940 Area codes 682 and 817 Area codes 682 and 817 Area codes 214, 469, 972, and 945 Area codes 214, 469, 945, and 972 Area codes 430 and 903 Area code 575 Area code 915 Area code 432 Area codes 281, 346, 713, and 832 Area codes 281, 713, and 832 Area code 979 Area code 936 Area code 409 Area code 361 Area code 956 Area codes 210 and 726 Area codes 210 and 726 Area code 830 Area code 512 Area code 254 Area code 325 Area code 318 Area code 337 Area code 870 Area code 580
Numbering plan areas and area codes of Texas with numbering plan area 430/903 highlighted.