These entries are queried from radb.net using whois, you can try my project getting these.
:AS37977 route: 203.144.241.0/24 descr: Tisco origin: AS37977 mnt-by: MAINT-AS7470 changed: register [at] asianet.co.th 20060313 #04:27:22(UTC) source: RADB last-modified: 2023-11-13T15:39:37Z rpki-ov-state: valid