These entries are queried from radb.net using whois, you can try my project getting these.
:AS57250 route: 91.236.246.0/23 descr: Ru-Net-Ltd 20130424 origin: AS57250 mnt-by: MNT-RU-NET created: 2013-04-24T14:31:34Z last-modified: 2013-04-24T14:31:34Z 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: 193.41.203.0/24 descr: Ru-Net-Ltd 20111104 origin: AS57250 mnt-by: MNT-RU-NET created: 2011-11-04T07:29:53Z last-modified: 2011-11-04T07:29:53Z 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: 193.242.170.0/23 descr: Ru-Net-Ltd 20130424 origin: AS57250 mnt-by: MNT-RU-NET created: 2013-04-24T14:35:23Z last-modified: 2013-04-24T14:35:23Z 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