These entries are queried from radb.net using whois, you can try my project getting these.
:AS56101 route: 203.5.28.0/24 origin: AS56101 descr: Vocus Route IPv4 mnt-by: MAINT-AS9790 changed: radbupdater [at] vocusgroup.co.nz 20231128 source: RADB last-modified: 2023-11-28T03:42:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source