These entries are queried from radb.net using whois, you can try my project getting these.
:AS6200 route: 128.248.0.0/16 descr: Proxy-registered route object origin: AS6200 mnt-by: MAINT-AS38 changed: net-trouble [at] illinois.edu 20161201 #21:32:32Z source: RADB last-modified: 2023-11-13T15:50:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 128.248.30.0/24 origin: AS6200 descr: Proxy-registered route object mnt-by: MAINT-AS38 changed: iccn-ops-l [at] listserv.illinois.edu 20201211 #19:29:35Z source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 131.193.34.0/24 origin: AS6200 descr: Proxy-registered route object mnt-by: MAINT-AS38 changed: iccn-ops-l [at] listserv.illinois.edu 20201211 #19:30:39Z source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 131.193.182.0/23 origin: AS6200 descr: Proxy-registered route object mnt-by: MAINT-AS38 changed: iccn-ops-l [at] listserv.illinois.edu 20201211 #19:31:26Z source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.43.252.0/24 descr: Proxy-registered route object origin: AS6200 mnt-by: MAINT-AS38 changed: net-trouble [at] illinois.edu 20161201 #21:33:04Z source: RADB last-modified: 2023-11-13T15:50:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source