These entries are queried from radb.net using whois, you can try my project getting these.
:AS55597 route: 49.50.0.0/23 descr: AS55597 origin: AS55597 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20191031 #07:14:33Z source: RADB last-modified: 2023-11-13T15:58:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source