These entries are queried from radb.net using whois, you can try my project getting these.
:AS2494 route: 149.148.0.0/16 descr: MUW-NET origin: AS2494 mnt-by: AS2494-MNT mnt-by: ACONET-LIR-MNT created: 1970-01-01T00:00:00Z last-modified: 2017-01-27T13:10:05Z 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 route6: 2001:67c:27c::/48 descr: MedUni Wien origin: AS2494 mnt-by: ACONET-LIR-MNT created: 2011-03-23T07:59:55Z last-modified: 2011-03-23T07:59:55Z 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