 The route was extended northward to Plainview on January 27, 1950.It was extended north to the Swisher County line on December 17, 1952, replacing the section of FM 788 from US 70 north to the junction of FM 788 and FM 400.On October 29, 1953, it extended north to FM 145; this created the concurrency with FM 788, which TxDOT officially considers a gap in that route's mileage.