These entries are queried from radb.net using whois, you can try my project getting these.
:AS400652 route: 50.229.246.0/24 origin: AS400652 descr: KRV-GSH-NET mnt-by: MAINT-AS13807 changed: rwlodarczyk [at] gpcom.com 20220708 #21:06:36Z source: RADB last-modified: 2023-11-13T16:11:43Z rpki-ov-state: valid