These entries are queried from radb.net using whois, you can try my project getting these.
:AS17901 route: 210.246.156.0/23 origin: AS17901 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: 2024-02-04T10:50:22Z source: APNIC rpki-ov-state: valid route: 210.246.156.0/23 origin: AS17901 descr: Samart Corporation Public Company, Thailand mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20240115 # 1354Z source: RADB last-modified: 2024-01-15T13:54:09Z rpki-ov-state: valid route: 210.246.156.0/24 descr: Samart Corporation Public Company, Thailand origin: AS17901 mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20141203 #08:00:36Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: valid route: 210.246.156.0/24 descr: CMI IP Transit origin: AS17901 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 route: 210.246.156.0/24 origin: AS17901 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: 2024-02-04T10:50:23Z source: APNIC rpki-ov-state: valid route: 210.246.157.0/24 descr: CMI IP Transit origin: AS17901 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 route: 210.246.157.0/24 descr: Samart Corporation Public Company, Thailand origin: AS17901 mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20141203 #08:02:20Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: valid route: 210.246.157.0/24 origin: AS17901 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: 2024-02-04T10:50:24Z source: APNIC rpki-ov-state: valid route: 210.246.194.0/23 descr: One to One Contacts Public Company Limited., Thailand origin: AS17901 mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20141203 #08:04:21Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: valid route: 210.246.194.0/23 origin: AS17901 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: 2024-02-04T10:50:26Z source: APNIC rpki-ov-state: valid route: 210.246.194.0/24 descr: CMI IP Transit origin: AS17901 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 route: 210.246.194.0/24 origin: AS17901 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: 2024-02-04T10:50:27Z source: APNIC rpki-ov-state: valid route: 210.246.194.0/24 descr: One to One Contacts Public Company Limited., Thailand origin: AS17901 mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20140930 #10:40:03Z source: RADB last-modified: 2023-11-13T15:46:41Z rpki-ov-state: valid route: 210.246.195.0/24 descr: One to One Contacts Public Company Limited., Thailand origin: AS17901 mnt-by: MAINT-SAMART-TH changed: manasri [at] samartinfonet.co.th 20140930 #10:41:16Z source: RADB last-modified: 2023-11-13T15:46:41Z rpki-ov-state: valid route: 210.246.195.0/24 descr: CMI IP Transit origin: AS17901 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 route: 210.246.195.0/24 origin: AS17901 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: 2024-02-04T10:50:28Z source: APNIC rpki-ov-state: valid