These entries are queried from radb.net using whois, you can try my project getting these.
:AS-VIRTONE-NL as-set: AS-VIRTONE-NL descr: Virtone Netherlands Network descr: List of all AS's and AS sets that should be accepted from Virtone Netherlands. members: AS203368 members: AS15966 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-lower: MNT-VIRTONE mnt-by: MNT-VIRTONE created: 2016-02-12T22:21:52Z last-modified: 2018-03-02T23:26:48Z 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: ****************************