These entries are queried from radb.net using whois, you can try my project getting these.
:AS53749 route: 24.52.124.0/24 descr: downstream customer origin: AS53749 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20110525 #14:50:25Z source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source