These entries are queried from radb.net using whois, you can try my project getting these.
:AS23687 route: 202.29.77.0/24 descr: UniNet Bangkok PoP Route for IPST origin: AS23687 notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: kongjue [at] uni.net.th 20041213 source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:3c8:1701::/48 descr: Route The Institute for the Promotion of Teaching Science and Technology Network origin: AS23687 notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20160523 #10:32:54Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source