These entries are queried from radb.net using whois, you can try my project getting these.
:AS43258 route: 91.189.152.0/21 descr: CSO-NET2 PI ASSIGNMENT origin: AS43258 mnt-by: CSO-MNT created: 2010-03-18T15:58:28Z last-modified: 2010-03-18T15:59:59Z 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 route: 91.198.31.0/24 descr: CSO PI Address space origin: AS43258 mnt-by: CSO-MNT created: 2007-07-09T15:20:57Z last-modified: 2007-07-09T15:20:57Z 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: 91.222.32.0/22 descr: CSO-NET3 PI ASSIGNMENT origin: AS43258 mnt-by: CSO-MNT created: 2010-11-25T08:25:16Z last-modified: 2010-11-25T08:26:20Z 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: 91.245.96.0/19 descr: CSO-NET5 PI ASSIGNMENT origin: AS43258 mnt-by: CSO-MNT created: 2012-08-21T13:01:07Z last-modified: 2012-08-21T13:01:07Z 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: 188.191.64.0/20 descr: CSO-NET4 PI ASSIGNMENT origin: AS43258 mnt-by: CSO-MNT created: 2011-02-21T16:51:59Z last-modified: 2011-02-21T16:51:59Z 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