These entries are queried from radb.net using whois, you can try my project getting these.
:AS394321 route: 66.97.237.0/24 origin: AS394321 descr: NISC mnt-by: MAINT-AS26794 changed: sfrank [at] dakotacarrier.com 20220403 #02:32:16Z source: RADB last-modified: 2023-11-13T16:10:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.97.239.0/24 origin: AS394321 descr: NISC mnt-by: MAINT-AS26794 changed: sfrank [at] dakotacarrier.com 20220403 #02:28:15Z source: RADB last-modified: 2023-11-13T16:10:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.147.165.0/24 origin: AS394321 descr: NISC mnt-by: MAINT-AS26794 changed: sfrank [at] dakotacarrier.com 20220403 #02:30:15Z source: RADB last-modified: 2023-11-13T16:10:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:d5:c000::/48 origin: AS394321 descr: NISC Cloud Infrastructure 3131 Technology Drive NW Mandan ND 58554 United States admin-c: HOSTE18-ARIN tech-c: HOSTE18-ARIN mnt-by: MNT-NISC-5 created: 2022-02-03T17:00:11Z last-modified: 2022-02-03T17:00:11Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source