These entries are queried from radb.net using whois, you can try my project getting these.
:AS11350 route: 216.57.112.0/24 descr: Northwestern Medical Center Inc. (NMC) origin: AS11350 mnt-by: MAINT-TVC changed: fhu [at] firstlight.net 20200110 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source