These entries are queried from radb.net using whois, you can try my project getting these.
:AS397180 route: 50.239.237.0/24 descr: Boardwalk 1000 LLC origin: AS397180 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20190226 source: RADB last-modified: 2023-11-13T15:55:42Z rpki-ov-state: valid