These entries are queried from radb.net using whois, you can try my project getting these.
:AS34293 route: 91.237.51.0/24 descr: JSTEL s.r.o Prague Czech Republic origin: AS34293 org: ORG-JSTE1-RIPE mnt-by: JSTEL-MNT created: 2012-07-16T09:13:30Z last-modified: 2012-09-05T13:12:39Z source: RIPE notify: support [at] jstel.cz 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: 91.247.64.0/23 descr: JSTEL dynamic allocated networks org: ORG-JSTE1-RIPE origin: AS34293 mnt-by: JSTEL-MNT created: 2012-09-05T13:18:32Z last-modified: 2012-09-05T13:25:43Z 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