These entries are queried from radb.net using whois, you can try my project getting these.
:AS18799 route: 209.252.183.0/24 descr: RR-RC-Palmdale Regional Medical Center-Los Angeles origin: AS18799 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:15Z rpki-ov-state: valid