According to Wikipedia, Nakhon Ratchasima railway station is a 1st class station and the main railway station in Nakhon Ratchasima Province. This station located in west side of the city of Nakhon Ratchasima. There are 18 daily trains including 1 Eastern Oriental train service to this station. Also, there are 4 to 6 special trains service in New Year, Songkran or other special festival. In the 2008 census, Nakhon Ratchasima Station served nearly 800,000 passengers.
Nakhon Ratchasima station opened for service as Khorat Station using Standard gauge rolling stock on 11 November 1900. The opening ceremony was performed by King Chulalongkorn on 21 December 1900 at the terminus for the Nakhon Ratchasima Line from Bangkok. Other key dates include the conversion to (1m) gauge in 1922, renaming of the station from Khorat Station in 1934 and the rebuilding of the station in 1955 after it was damaged by bombs in WW2. Extensions to the line from the station didn't occur until just before WW2. Train services from Nakhon Ratchasima station are:

Diesel Railcar Special Express train No. 21 from Bangkok to Ubon Ratchathani
Diesel Railcar Special Express train No. 22 from Ubon Ratchathani to Bangkok
E-sanwattana Special Express train No. 23 from Bangkok to Ubon Ratchathani
E-sanwattana Special Express train No. 24 from Ubon Ratchathani to Bangkok
Express train No.67 from Bangkok to Ubon Ratchathani
Express train No.68 from Ubon Ratchathani to Bangkok
Diesel Railcar Express train No. 71 from Ubon Ratchathani to Bangkok
Diesel Railcar Express train No. 72 from Bangkok to Ubon Ratchathani
Diesel Railcar Express train No. 77 from Bangkok to Nong Khai
Diesel Railcar Express train No. 78 Udon Thani to Bangkok
Rapid train No. 135 from Bangkok to Ubon Ratchathani
Rapid train No. 136 from Ubon Ratchathani to Bangkok
Rapid train No. 139 from Bangkok to Ubon Ratchathani
Rapid train No. 140 from Ubon Ratchathani to Bangkok
Rapid train No. 141 from Bangkok to Ubon Ratchathani
Rapid train No. 142 from Ubon Ratchathani to Bangkok
Rapid train No. 145 from Bangkok to Ubon Ratchathani
Rapid train No. 146 from Ubon Ratchathani to Bangkok
Ordinary train No. 233 from Bangkok to Surin
Ordinary train No. 234 from Surin to Bangkok
Local train No. 415 from Nakhon Ratchasima to Nong Khai
Local train No. 418 from Nong Khai to Nakhon Ratchasima
Local train No. 416 from Nakhon Ratchasima to Udon Thani
Local train No. 417 from Udon Thani to Nakhon Ratchasima
Local train No. 419 from Nakhon Ratchasima to Ubon Ratchathani
Local train No. 420 from Ubon Ratchathani to Nakhon Ratchasima
Local train No. 421 from Nakhon Ratchasima to Ubon Ratchathani
Local train No. 426 from Ubon Ratchathani to Nakhon Ratchasima
Local train No. 424 from Samrong Thab to Nakhon Ratchasima
Local train No. 427 from Nakhon Ratchasima to Ubon Ratchathani
Local train No. 428 from Ubon Ratchathani to Nakhon Ratchasima
Local train No. 429 from Nakhon Ratchasima to Bua Yai junction
Local train No. 430 from Bua Yai junction to Nakhon Ratchasima
Local train No. 431 from Kaeng Khoi junction to Khon Kaen
Local train No. 432 from Khon Kaen to Kaeng Khoi junction