These entries are queried from radb.net using whois, you can try my project getting these.
:AS33413 route: 64.244.99.0/24 descr: PNAP-DEN pgpcorp-2 route origin: AS33413 mnt-by: MAINT-AS1828 changed: roneal [at] internap.com 20090115 source: RADB last-modified: 2023-11-13T16:14:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.37.7.0/24 descr: Proxy for Beta Offshore origin: AS33413 mnt-by: MAINT-CHTR-WD changed: thomas.heljula [at] charter.com 20130904 #06:45:51Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.52.43.0/24 descr: PNAP-DEN pgpcorp origin: AS33413 mnt-by: MAINT-AS1828 changed: jmontoya [at] internap.com 20041213 source: RADB last-modified: 2023-11-13T16:13:54Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source