These entries are queried from radb.net using whois, you can try my project getting these.
:AS132482 route: 203.158.216.0/21 descr: Rajamangala University of Technology Rattanakosin network origin: AS132482 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170426 #03:49:25Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.216.0/23 descr: Rajamangala University of Technology Rattanakosin network ((Pohchang Campus) origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170426 #03:27:59Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.216.0/24 descr: Rajamangala University of Technology Rattanakosin network member of UniNet origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170501 #04:39:42Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.217.0/24 descr: Rajamangala University of Technology Rattanakosin network member of UniNet origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170501 #04:43:07Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.218.0/23 descr: Rajamangala University of Technology Rattanakosin network (Borpit Pimuk Campus) origin: AS132482 notify: noc [at] uni.net.th notify: Watcharin.W [at] rmutr.ac.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170426 #03:28:25Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.218.0/24 descr: Rajamangala University of Technology Rattanakosin network member of UniNet origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170501 #04:43:50Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.219.0/24 descr: Rajamangala University of Technology Rattanakosin network member of UniNet origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170501 #04:44:25Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.220.0/23 descr: CAT route object for CAT Telecom origin: AS132482 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20170522 source: RADB last-modified: 2023-11-13T15:51:12Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.220.0/24 descr: RMUTR_Network Ratanakosin_Salaya origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20121120 #04:00:43Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.221.0/24 descr: RMUTR Network Rattanakosin_Salaya origin: AS132482 notify: noc [at] uni.net.th notify: Watcharin.W [at] rmutr.ac.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20121120 #03:58:26Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.222.0/24 descr: Rajamangala University of Technology Rattanakosin network (Klaikangwon Campus) origin: AS132482 notify: Watcharin.W [at] rmutr.ac.th notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170521 #14:27:00Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.158.223.0/24 descr: Rajamangala University of Technology Rattanakosin network (Klaikangwon Campus) origin: AS132482 notify: noc [at] uni.net.th notify: Watcharin.W [at] rmutr.ac.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170521 #14:28:02Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:3c8:2705::/48 descr: CAT route object for CAT Telecom origin: AS132482 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20160622 source: RADB last-modified: 2023-11-13T15:49:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source