These entries are queried from radb.net using whois, you can try my project getting these.
:AS58023 route: 91.237.248.0/24 descr: IT Assist Services SRL origin: AS58023 mnt-by: IT-ASSIST-MNT created: 2012-04-04T12:00:16Z last-modified: 2012-04-04T12:00:16Z 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: valid