These entries are queried from radb.net using whois, you can try my project getting these.
:AS-NETLAN as-set: AS-NETLAN descr: NetLan Ltd. remarks: NetLan Ltd. members: AS20750 remarks: Leader PI CI Ltd. members: AS62110 remarks: PON.BG Ltd. members: AS-PONBG members: AS49658 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: IPACCT-MNT mnt-by: NETLAN-MNT created: 2014-02-10T14:18:07Z last-modified: 2020-10-07T18:08:36Z 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: ****************************