These entries are queried from radb.net using whois, you can try my project getting these.
:AS197172 route: 91.198.4.0/24 descr: ASSIGNED PI "NICENET PLUS" ltd. origin: AS197172 mnt-by: NICENETPLUS-MNT created: 2010-07-09T15:21:03Z last-modified: 2014-12-07T08:12:15Z source: RIPE pingable: 91.198.4.3 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