These entries are queried from radb.net using whois, you can try my project getting these.
:AS393323 route: 184.16.241.0/24 descr: Route for Downstream Mapletronics origin: AS393323 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20140915 #15:02:04Z source: RADB last-modified: 2023-11-13T15:46:40Z rpki-ov-state: valid