These entries are queried from radb.net using whois, you can try my project getting these.
:AS64229 route: 216.252.161.0/24 descr: NET-216-252-161-0-1 origin: AS64229 notify: sys.admin [at] acsalaska.net mnt-by: MAINT-ACS changed: tom.simes [at] acsalaska.com 20170320 #18:10:05Z source: RADB last-modified: 2023-11-13T15:50:55Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source