These entries are queried from radb.net using whois, you can try my project getting these.
:AS397414 route: 138.43.253.0/24 descr: RS-RC-KEARNEY REGIONAL MEDICAL CENTER-Midwest origin: AS397414 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20190627 #21:08:27Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source