These entries are queried from radb.net using whois, you can try my project getting these.
:AS51249 route: 87.99.71.0/24 descr: Telenet/Silko origin: AS51249 mnt-by: TELENETSIA-MNT created: 2011-09-02T08:13:01Z last-modified: 2011-09-02T08:13:01Z 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: valid route: 91.218.52.0/22 descr: Silko origin: AS51249 mnt-by: SILKO-MNT created: 2010-10-19T16:58:41Z last-modified: 2010-10-19T16:58:41Z 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: 91.218.55.0/24 descr: SILKO-NET origin: AS51249 mnt-by: SILKO-MNT created: 2015-08-28T11:21:16Z last-modified: 2015-08-28T11:21:16Z 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: 193.169.12.0/23 descr: SILKO origin: AS51249 mnt-by: SILKO-MNT created: 2010-09-15T16:08:43Z last-modified: 2010-09-15T16:08:43Z 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: 193.169.13.0/24 descr: SILKO origin: AS51249 mnt-by: SILKO-MNT created: 2010-09-16T22:51:41Z last-modified: 2010-09-16T22:51:41Z 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