These entries are queried from radb.net using whois, you can try my project getting these.
:AS-ISTANET as-set: AS-Istanet descr: Customers of Istranet LLC descr: -------------------------------------------------------------------------------------- remarks: INTERROS-AS Customer members: AS51138 remarks: IKA-Telecom-AS Customer members: AS47213 remarks: Gorset-AS Customer members: AS57421 remarks: ISTRANET-AS members: AS42291 remarks: INTERROS-AS Customer members: AS62426 remarks: INTELLEKT-AS members: AS51507 remarks: AirNet-AS members: AS200022 remarks: LNTK-AS Customer members: AS49825 remarks: ESTEITINVEST-AS Customer members: AS44093 remarks: OTC-AS Customer members: AS47860 remarks: gtlink-AS members: AS62046 remarks: TCV Customer members: AS49510 remarks: Istranet AS-Set includes AS205439 and Customers asns members: AS205439 remarks: ISTRA-dot-NET-AS members: AS216363 remarks: SITI-LAJT-AS members: AS216247 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: ISTRANET-MNT mnt-by: IP-PARK-MNT created: 2013-01-15T12:41:05Z last-modified: 2024-04-26T14:14:29Z 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: ****************************