These entries are queried from radb.net using whois, you can try my project getting these.
:AS4741 route: 203.149.0.0/18 descr: Samart Infonet Co., Ltd., Internet Service Provider, Thailand origin: AS4741 notify: noc [at] samart.co.th mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20110828 #11:45:44Z source: RADB last-modified: 2023-11-13T15:41:22Z rpki-ov-state: valid route: 203.149.0.0/18 origin: AS4741 descr: Samart Infonet Co., Ltd. 99 / 7 Moo 4 29th Flr Software Park Building, Chaengwattana Rd Klong Gluar mnt-by: MAINT-SAMART-TH last-modified: 2024-02-03T11:27:34Z source: APNIC rpki-ov-state: valid route: 203.157.86.0/23 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.92.0/23 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.97.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.108.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.110.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.114.0/23 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.114.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070405 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.118.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070405 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.168.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.169.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.172.0/23 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.184.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070405 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.213.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.228.0/22 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.232.0/22 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.157.238.0/24 descr: CAT route object for Samart origin: AS4741 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20070329 source: RADB last-modified: 2023-11-13T15:45:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.246.64.0/18 origin: AS4741 descr: Samart Infonet Co., Ltd. 99 / 7 Moo 4 29th Flr Software Park Building, Chaengwattana Rd Klong Gluar mnt-by: MAINT-SAMART-TH last-modified: 2024-02-03T11:24:51Z source: APNIC rpki-ov-state: valid route: 210.246.64.0/18 descr: Samart Infonet Co., Ltd., Internet Service Provider, Thailand origin: AS4741 mnt-by: MAINT-SAMART-TH changed: yut [at] samart.co.th 20040622 source: RADB last-modified: 2023-11-13T15:39:35Z rpki-ov-state: valid route: 210.246.128.0/17 origin: AS4741 descr: Samart Infonet Co., Ltd. 99 / 7 Moo 4 29th Flr Software Park Building, Chaengwattana Rd Klong Gluar mnt-by: MAINT-SAMART-TH last-modified: 2024-02-03T11:26:20Z source: APNIC rpki-ov-state: valid route: 210.246.128.0/17 descr: Samart Infonet Co., Ltd., Internet Service Provider, Thailand origin: AS4741 mnt-by: MAINT-SAMART-TH changed: yut [at] samart.co.th 20040622 source: RADB last-modified: 2023-11-13T15:39:35Z rpki-ov-state: valid route: 210.246.128.0/17 descr: CMI IP Transit origin: AS4741 admin-c: MAINT-CMI-INT-HK tech-c: MAINT-CMI-INT-HK mnt-by: MAINT-CMI-INT-HK changed: qas_support [at] cmi.chinamobile.com 20160815 source: NTTCOM rpki-ov-state: valid route6: 2403:c000::/32 descr: Samart Infonet origin: AS4741 mnt-by: MAINT-SAMART-TH changed: yut [at] samart.co.th 20070515 #04:10:36(UTC) source: RADB last-modified: 2023-11-13T15:39:41Z rpki-ov-state: valid route6: 2403:c000::/32 origin: AS4741 descr: Samart Infonet Co., Ltd. 99 / 7 Moo 4 29th Flr Software Park Building, Chaengwattana Rd Klong Gluar mnt-by: MAINT-SAMART-TH last-modified: 2024-02-03T11:31:55Z source: APNIC rpki-ov-state: valid