Area Code 409

Area code 409 was created on November 19, 1982, when it was split from area code 713. The new code initially covered a horseshoe-shaped region nearly encircling Houston, stretching from the Louisiana border westward to Bryan-College Station. It was one of several Texas splits in the early 1980s driven by the rapid population and telephone growth along the Gulf Coast and in the state's interior. Source: Wikipedia.

Key milestones:

• 1982: Area code 409 created from a split of 713, initially serving southeastern Texas from the Louisiana line to the Brazos Valley.
• 2000: A rare three-way split carved out two new area codes from the original 409 territory. Area code 936 was created for the central Nacogdoches-Lufkin corridor, and area code 979 was created for the Bryan-College Station region. Area code 409 retained the eastern segment covering the Beaumont-Port Arthur-Galveston Gulf Coast corridor.
• 2021: Mandatory 10-digit local dialing was implemented on October 25, after the FCC designated 988 as the National Suicide Prevention Lifeline. Area code 409 had existing numbers using the 988 prefix, requiring the transition. Source: Texas PUC.

The three-way split in 2000 is notable in North American Numbering Plan history. Most area code splits create a single new code, but the 409 territory was divided into three parts simultaneously. After the split, area code 409 no longer encircled Houston and instead became the signature code for the Beaumont-Port Arthur metropolitan area and surrounding Gulf Coast communities.

Area code 409 has been administered through Texas Public Utilities Commission proceedings and NANPA numbering plan management. Created in 1982 and activated in 1983, it has undergone two significant regulatory events over four decades. Source: Texas PUC.