These entries are queried from radb.net using whois, you can try my project getting these.
:AS38184 route: 203.150.35.0/24 origin: AS38184 descr: Internet Thailand Company Ltd. 1768 IFCT Tower, 10th-12th FL IT Floor New Petchburi Road Khwaeng Bang Kapi Khet Huay Khwang mnt-by: MAINT-TH-INET last-modified: 2020-11-19T08:19:24Z source: APNIC rpki-ov-state: valid route: 203.150.35.0/24 descr: Thaivivat-TH origin: AS38184 mnt-by: MAINT-AS4618 changed: yterayut [at] gmail.com 20181009 #07:10:21Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: valid route: 203.150.252.0/22 descr: INET-MANDALA-TH origin: AS38184 mnt-by: MAINT-AS4618 changed: nidchan [at] inet.co.th 20121003 #08:31:46Z source: RADB last-modified: 2023-11-13T15:49:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.151.25.0/24 origin: AS38184 descr: Internet Thailand Company Ltd. 1768 IFCT Tower, 10th-12th FL IT Floor New Petchburi Road Khwaeng Bang Kapi Khet Huay Khwang mnt-by: MAINT-TH-INET last-modified: 2020-11-19T08:19:26Z source: APNIC rpki-ov-state: valid route: 203.151.25.0/24 descr: INET-TH origin: AS38184 mnt-by: MAINT-AS4618 changed: yterayut [at] gmail.com 20180628 #14:09:45Z source: RADB last-modified: 2023-11-13T15:54:01Z rpki-ov-state: valid