These entries are queried from radb.net using whois, you can try my project getting these.
:AS52172 route: 91.223.24.0/24 descr: Zagrebacki holding d.o.o. origin: AS52172 mnt-by: OT-MNT created: 2011-01-19T11:11:59Z last-modified: 2019-02-12T13:50:30Z 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