These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CENTRLAN as-set: AS-CENTRLAN descr: ASes we announces to upstreams or peers members: AS42104 members: AS48538 members: AS31336 members: AS8712 members: AS51891 members: AS61382 members: AS-KSINVEST tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: CENTRLAN-MNT created: 2009-04-21T08:35:34Z last-modified: 2016-03-01T13:48:05Z 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: ****************************