These entries are queried from radb.net using whois, you can try my project getting these.
:AS36521 route: 199.66.208.0/21 origin: AS36521 descr: Proxy registration for Metronet customer mnt-by: MAINT-AS30600 changed: miles.mccredie [at] metronetinc.com 20200612 #21:10:20Z source: RADB last-modified: 2023-11-13T16:00:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.69.16.0/22 descr: For downstream customer Cinergy Metronet origin: AS36521 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20140925 #17:37:24Z source: RADB last-modified: 2023-11-13T15:46:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.79.172.0/22 descr: For downstream customer Cinergy Metronet origin: AS36521 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20140925 #17:38:13Z source: RADB last-modified: 2023-11-13T15:46:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source