These entries are queried from radb.net using whois, you can try my project getting these.
:AS57854 route: 91.235.242.0/24 origin: AS57854 descr: UNISTAR LC d.o.o. mnt-by: MNT-T-2 mnt-by: AS5603-MNT created: 2020-12-16T08:04:09Z last-modified: 2021-01-21T12:30:26Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route6: 2001:67c:2720::/48 descr: Alterna Intertrade d.d., druzba za racunalniski inzeniring, Ljubljana origin: AS57854 mnt-by: ALTERNA-MNT created: 2012-03-01T11:43:56Z last-modified: 2012-03-01T11:43:56Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source