These entries are queried from radb.net using whois, you can try my project getting these.
:AS397602 route: 12.17.138.0/23 descr: BOREALISBROADBAND-12.17.138.0-23 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20201117 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 12.17.176.0/20 descr: BOREALISBROADBAND-12.17.176.0-20 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20201117 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 12.146.36.0/24 descr: BOREALISBROADBAND-12.146.36.0-24 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20220428 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 12.146.42.0/24 descr: BOREALISBROADBAND-12.146.42.0-24 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20220428 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.82.56.0/22 descr: BOREALISBROADBAND-208.82.56.0-22 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20201117 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.73.140.0/22 descr: BOREALISBROADBAND-216.73.140.0-22 origin: AS397602 mnt-by: MAINT-AS397602 changed: akscottfleming [at] gmail.com 20220428 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source