These entries are queried from radb.net using whois, you can try my project getting these.
:AS18205 route: 202.28.121.0/24 descr: Asian-UST Chonburi Thailand origin: AS18205 notify: suwannay [at] asianust.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20021002 changed: tawee [at] uni.net.th 20040126 source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source