These entries are queried from radb.net using whois, you can try my project getting these.
:AS57441 route: 91.237.128.0/24 descr: KHARKOV-METRO origin: AS57441 org: ORG-MCKM1-RIPE mnt-by: MNT-METROKH created: 2012-03-30T07:47:29Z last-modified: 2012-03-30T07:47:29Z 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