These entries are queried from radb.net using whois, you can try my project getting these.
:AS397805 route: 206.221.213.0/24 origin: AS397805 descr: DYNASCALE-IAD 206.221.213.0/24 mnt-by: MAINT-AS7296 changed: neteng [at] alchemy.net 20231127 # 2030Z source: RADB last-modified: 2023-11-27T20:30:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.221.215.0/24 origin: AS397805 descr: DYNASCALE-IAD 206.221.215.0/24 mnt-by: MAINT-AS7296 changed: neteng [at] alchemy.net 20231127 # 2032Z source: RADB last-modified: 2023-11-27T20:32:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:6e00:a000::/35 origin: AS397805 descr: IAD Clients mnt-by: MAINT-AS7296 changed: neteng [at] alchemy.net 20231204 # 2156Z source: RADB last-modified: 2023-12-04T21:56:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source