These entries are queried from radb.net using whois, you can try my project getting these.
:AS62944 route: 204.52.244.0/24 descr: Burton Snowboard origin: AS62944 remarks: via burl tele mnt-by: MAINT-SOVER-NOC changed: noc [at] sover.net 20140221 #12:58:04Z source: RADB last-modified: 2023-11-13T16:00:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source