These entries are queried from radb.net using whois, you can try my project getting these.
:AS147187 route: 49.231.72.0/24 origin: AS147187 descr: AWN route object EDS Customer mnt-by: MAINT-AS45430 changed: saritapu [at] ais.co.th 20230314 #06:53:10Z source: RADB last-modified: 2023-11-13T16:15:24Z rpki-ov-state: valid route: 147.50.204.0/24 origin: AS147187 descr: AWN route object EDS Customer remarks: Please contact awn-noc [at] ais.co.th if you have any questions regarding this object mnt-by: MAINT-AS45430 changed: khajornp [at] ais.co.th 20230309 #09:31:51Z source: RADB last-modified: 2023-11-13T16:15:23Z rpki-ov-state: valid route: 147.50.204.0/24 origin: AS147187 descr: ADVANCED WIRELESS NETWORK COMPANY LIMITED 414 Phaholyothin Rd Samsen Nai Phayathai mnt-by: MAINT-AWN-CO-LTD-TH last-modified: 2023-03-09T09:45:08Z source: APNIC rpki-ov-state: valid route: 203.156.7.0/24 origin: AS147187 descr: Bualuang Securities mnt-by: MAINT-AS45629 changed: nmc [at] jasmine.com 20211007 #07:34:26Z source: RADB last-modified: 2024-01-03T03:00:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source