Guntakal–Renigunta section connects Guntakal and Renigunta in the Indian state of Andhra Pradesh. It is administered under Guntakal railway division of South Central Railway zone. It has a total route length of 309.50 km (192.31 mi).

Sources:

The first train service in southern India and the third in India was operated by Madras Railway from Royapuram / Veyasarapady to Wallajah Road (Arcot) in 1856. Madras Railway extended its trunk route to Beypur / Kadalundi (near Calicut) and initiated work on a north-western branch out of Arakkonam in 1861. The branch line reached Renigunta in 1862. The branch line out of Arakkonam reached Raichur in 1871, where it connected to the Great Indian Peninsula Railway line from Mumbai.

In the early 1950s legislation was passed authorizing the central government to take over independent railway systems that were there. On 14 April 1951 the Madras and Southern Mahratta Railway, the South Indian Railway Company and Mysore State Railway were merged to form Southern Railway. Subsequently, Nizam's Guaranteed State Railway was also merged into Southern Railway. On 2 October 1966, the Secunderabad, Solapur, Hubli and Vijayawada Divisions, covering the former territories of Nizam’s Guaranteed State Railway and certain portions of Madras and Southern Mahratta Railway were separated from Southern Railway to form the South Central Railway. In 1977, Guntakal division of Southern Railway was transferred to South Central Railway and the Solapur division transferred to Central Railway. Amongst the seven new zones created in 2003 was South Western Railway, which was carved out of Southern Railway.

...
Wikipedia