These entries are queried from radb.net using whois, you can try my project getting these.
:AS57583 route: 91.233.44.0/22 descr: VashnetRoute origin: AS57583 mnt-by: SHEFER-MNT created: 2011-12-05T16:18:21Z last-modified: 2011-12-05T16:18:21Z 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: 91.247.148.0/23 descr: VashnetRoute origin: AS57583 mnt-by: SHEFER-MNT created: 2013-08-05T18:17:57Z last-modified: 2013-08-05T18:26:09Z 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: 91.247.150.0/24 descr: VashnetRoute origin: AS57583 mnt-by: SHEFER-MNT created: 2013-08-09T18:10:39Z last-modified: 2013-08-09T18:10:39Z 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: 91.247.151.0/24 descr: VNRoute2Begunicu origin: AS57583 mnt-by: SHEFER-MNT created: 2014-06-06T07:04:50Z last-modified: 2014-06-06T07:04:50Z 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