These entries are queried from radb.net using whois, you can try my project getting these.
:AS393666 route: 192.219.255.0/24 descr: Covenant Health-St Marys Health =20 origin: AS393666 mnt-by: MAINT-TVC changed: tdewitt [at] firstlight.net 20190312 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source