These entries are queried from radb.net using whois, you can try my project getting these.
:AS33414 route: 205.142.56.0/22 origin: AS33414 descr: Kent County Information Systems mnt-by: MAINT-AS26554 changed: toc [at] ussignal.com 20210330 #14:21:24Z source: RADB last-modified: 2023-11-13T16:05:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.56.0/22 descr: ADDED FOR - AS33414 origin: AS33414 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.56.0/24 descr: Route for Kent County via City of Grand Rapids origin: AS33414 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20090402 #17:42:04Z source: RADB last-modified: 2023-11-13T15:39:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.57.0/24 descr: Route for Kent County via City of Grand Rapids origin: AS33414 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20090402 #17:42:12Z source: RADB last-modified: 2023-11-13T15:39:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.58.0/24 descr: ADDED FOR - AS33414 origin: AS33414 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.58.0/24 descr: Route for Kent County via City of Grand Rapids origin: AS33414 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20090402 #17:42:33Z source: RADB last-modified: 2023-11-13T15:39:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.142.59.0/24 descr: Route for Kent County via City of Grand Rapids origin: AS33414 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20090402 #17:42:40Z source: RADB last-modified: 2023-11-13T15:39:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source