These entries are queried from radb.net using whois, you can try my project getting these.
:AS137546 route: 203.158.118.0/24 descr: This Prefix for EN-RMUTT Via UniNet origin: AS137546 notify: itarun.p [at] en.rmutt.ac.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20180408 #03:13:52Z 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: 203.158.244.0/24 origin: AS137546 descr: Rajamangala University of Technology Tanyaburi network notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: kriengsak [at] uni.net.th 20190122 #05:03:33Z 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: 203.158.245.0/24 origin: AS137546 descr: Rajamangala University of Technology Tanyaburi network notify: noc [at] uni.net.th notify: itarun.p [at] gmail.com mnt-by: MAINT-AS4621 changed: kriengsak [at] uni.net.th 20190122 #05:05:35Z 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: 203.158.246.0/24 origin: AS137546 descr: Rajamangala University of Technology Tanyaburi network notify: noc [at] uni.net.th notify: itarun.p [at] gmail.com mnt-by: MAINT-AS4621 changed: kriengsak [at] uni.net.th 20190122 #05:08:28Z 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: 203.158.247.0/24 origin: AS137546 descr: Rajamangala University of Technology Tanyaburi network notify: noc [at] uni.net.th notify: itarun.p [at] gmail.com mnt-by: MAINT-AS4621 changed: kriengsak [at] uni.net.th 20190122 #05:09:50Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:3c8:e10e::/48 descr: Route for Rajamangala Institute of Technology Network origin: AS137546 notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20180408 #03:22:01Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source