These entries are queried from radb.net using whois, you can try my project getting these.
:AS23292 route: 24.35.0.0/17 descr: Broadstripe origin: AS23292 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20081210 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source