These entries are queried from radb.net using whois, you can try my project getting these.
:AS16956 route: 205.159.248.0/24 descr: CATTARAUGUS origin: AS16956 mnt-by: MAINT-TVC changed: rwhite [at] firstlight.net 20190429 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source