These entries are queried from radb.net using whois, you can try my project getting these.
:AS53742 route: 74.221.74.0/24 descr: Houlton Regional Hospital (HRH-8) origin: AS53742 mnt-by: MAINT-TVC changed: tdewitt [at] firstlight.net 20200221 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source