These entries are queried from radb.net using whois, you can try my project getting these.
:AS397891 route: 137.83.23.0/24 origin: AS397891 descr: Proxy_ColumbusComHosp mnt-by: MAINT-AS13807 changed: dhoer [at] gpcom.com 20240129 # 1806Z source: RADB last-modified: 2024-01-29T18:06:28Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.83.23.0/24 descr: Columbus Community Hospital descr: 4600 38th Street descr: Columbus, NE 68601 descr: US origin: AS397891 mnt-by: MNT-CCH-156 changed: mrjeffryes [at] columbushosp.org 20190829 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source