These entries are queried from radb.net using whois, you can try my project getting these.
:AS393523 route: 192.31.228.0/24 descr: Winnipeg Internet Exchange Services IPv4 origin: AS393523 notify: noc [at] wpgix.net mnt-by: MNT-WIE-5 changed: admin [at] wpgix.net 20150713 source: ARIN rpki-ov-state: valid route6: 2620:4b::/48 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS393523 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: valid