These entries are queried from radb.net using whois, you can try my project getting these.
:AS136737 route: 203.158.208.0/21 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:05:23Z 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: 203.158.208.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:10:35Z 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: 203.158.209.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:11:25Z 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: 203.158.210.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:11:38Z 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: 203.158.211.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:11:58Z 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: 203.158.212.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:12:19Z 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: 203.158.213.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:12:35Z 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: 203.158.214.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:12:55Z 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: 203.158.215.0/24 descr: Rajamangala University of Technology KrungTep network Member of UniNet origin: AS136737 notify: itarun.p [at] gmail.com notify: noc [at] uni.net.th mnt-by: MAINT-AS4621 changed: tawee [at] uni.net.th 20170612 #10:13:12Z source: RADB last-modified: 2023-11-13T15:55:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source