These entries are queried from radb.net using whois, you can try my project getting these.
:AS33106 route: 72.35.224.0/22 descr: NHI ROUTE origin: AS33106 mnt-by: NHI-MNT changed: barry.wahrman [at] level3.com 20060207 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 72.35.232.0/22 descr: NHI ROUTE origin: AS33106 mnt-by: NHI-MNT changed: barry.wahrman [at] level3.com 20060207 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.10.88.0/21 descr: NHI ROUTE origin: AS33106 mnt-by: NHI-MNT changed: barry.wahrman [at] level3.com 20060207 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source