These entries are queried from radb.net using whois, you can try my project getting these.
:AS50449 route: 109.237.224.0/20 descr: RU-KVANT-Z Route Block origin: AS50449 mnt-by: MNT-KVANTZ created: 2010-01-22T05:47:32Z last-modified: 2010-01-22T05:47:32Z 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 route: 185.153.240.0/22 origin: AS50449 mnt-by: MNT-KVANTZ created: 2016-05-30T10:31:59Z last-modified: 2016-05-30T10:31:59Z 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