Area code 940 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Texas in the Wichita Falls and Denton areas. It was created on July 7, 1997, in a split from area code 817.

Counties:

Archer, Baylor, Childress, Clay, Cooke, Cottle, Denton, Foard, Grayson, Hardeman, Haskell, Jack, Knox, Montague, Palo Pinto, Parker, Stonewall, Throckmorton, Wichita, Wilbarger, Wise, and Young

Towns and cities:

Alvord, Archer City, Argyle, Aubrey, Bellevue, Benjamin, Bluegrove, Bowie, Boyd, Bridgeport, Bryson, Burkburnett, Byers, Cee Vee, Chico, Childress, Chillicothe, Corinth, Crowell, Decatur, Dennis, Denton, Electra, Era, Forestburg, Gainesville, Gordon, Goree, Graford, Graham, Greenwood, Harrold, Haskell, Henrietta, Holliday, Iowa Park, Jacksboro, Jermyn, Justin, Kamay, Knox City, Krum, Lantana, Lake Dallas, Lindsay, Loving, Megargel, Millsap, Mineral Wells, Mingus, Montague, Muenster, Munday, Myra, Newark, Newcastle, Nocona, O'Brien, Oklaunion, Old Glory, Olney, Palo Pinto, Paradise, Perrin, Petrolia, Pilot Point, Ponder, Poolville, Quanah, Ringgold, Rochester, Rosston, Rule, Saint Jo, Sanger, Santo, Scotland, Seymour, Sheppard Air Force Base, Slidell, South Bend, Sunset, Tell, Throckmorton, Tioga, Valley View, Vernon, Weinert, Whitt, Wichita Falls, Windthorst and Woodson

Prior to October 2021, area code 940 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.^[1]

• List of Texas area codes
• NANPA area code map of Texas