These entries are queried from radb.net using whois, you can try my project getting these.
:AS52912 route: 186.251.228.0/22 descr: ITX-MHNET origin: AS52912 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181009 #13:07:10Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 201.131.184.0/22 descr: ITX-MHNET origin: AS52912 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181009 #13:07:39Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:19b8::/32 descr: ITX-MHNET origin: AS52912 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181009 #13:08:06Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source