These entries are queried from radb.net using whois, you can try my project getting these.
:AS52131 route: 91.221.252.0/24 descr: CITY.NET Ltd. origin: AS52131 mnt-by: dtulyakov mnt-by: city-net mnt-by: Akirilyuk notify: dtulyakov [at] gmail.com notify: md5alx [at] gmail.com created: 2013-06-24T21:14:11Z last-modified: 2015-06-17T13:03:07Z 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: 91.221.253.0/24 descr: CITY.NET Ltd. origin: AS52131 mnt-by: dtulyakov mnt-by: city-net mnt-by: Akirilyuk notify: dtulyakov [at] gmail.com notify: md5alx [at] gmail.com created: 2013-06-24T21:14:20Z last-modified: 2015-06-17T13:03:13Z 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