These entries are queried from radb.net using whois, you can try my project getting these.
:AS11973 route: 204.246.152.0/21 descr: NextWeb: R4-Secure Independence (2nd) origin: AS11973 mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090223 #01:01:23Z source: RADB last-modified: 2023-11-13T15:39:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.186.75.0/24 descr: NextWeb: R4-Secure Independence origin: AS11973 notify: routing [at] nextweb.net mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090112 #00:50:47Z source: RADB last-modified: 2023-11-13T15:39:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.186.76.0/24 descr: NextWeb: R4-Secure Independence origin: AS11973 notify: routing [at] nextweb.net mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090112 #00:51:29Z source: RADB last-modified: 2023-11-13T15:39:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.190.171.0/24 descr: NextWeb: R4-Secure Independence origin: AS11973 notify: routing [at] nextweb.net mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090112 #00:46:55Z source: RADB last-modified: 2023-11-13T15:39:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.190.174.0/24 descr: NextWeb: R4-Secure Independence origin: AS11973 notify: routing [at] nextweb.net mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090112 #00:48:05Z source: RADB last-modified: 2023-11-13T15:39:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.190.175.0/24 descr: NextWeb: R4-Secure Independence origin: AS11973 notify: routing [at] nextweb.net mnt-by: MAINT-AS16467 changed: eng [at] nextweb.net 20090112 #00:50:04Z source: RADB last-modified: 2023-11-13T15:39:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source