These entries are queried from radb.net using whois, you can try my project getting these.
:AS-VITNETT as-set: AS-VITNETT descr: All ASes exported by Vitnett descr: Own and customer ASes members: AS52157 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: VITNETT-LIR created: 2011-01-28T07:04:10Z last-modified: 2011-01-28T07:05:10Z 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: ****************************