These entries are queried from radb.net using whois, you can try my project getting these.
:AS-IGLOO22225 as-set: AS-IGLOO22225 tech-c: DUMY-RIPE admin-c: DUMY-RIPE descr: All ASNs operated by igloo22225 and downstreams remarks: igloo22225-operated ASNS: members: AS203729 members: AS42615 members: AS39335 remarks: Downstream ASNs: members: AS212232 members: AS204318 members: AS400564 members: AS204136 members: AS-APERTURE-NETWORKS members: AS-BASIL mbrs-by-ref: igloo22225 mnt-by: igloo22225 created: 2017-03-19T01:59:37Z last-modified: 2023-11-03T17:16:42Z 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: **************************** as-set: AS-IGLOO22225 admin-c: JS18971-RIPE tech-c: JS18971-RIPE descr: All ASNs operated by igloo22225 and downstreams remarks: igloo22225-operated ASNS: members: AS203729 members: AS42615 members: AS39335 remarks: Downstream ASNs: members: AS212232 members: AS204318 members: AS400564 members: AS204136 members: AS-APERTURE-NETWORKS members: AS-BASIL mnt-by: MAINT-IGLOO changed: whois [at] igloo.to 20231214 notify: whois [at] igloo.to source: ALTDB as-set: AS-IGLOO22225 descr: All ASNs operated by igloo22225 and downstreams members: AS203729,AS42615,AS39335,AS204318,AS212232,AS400564,AS204136,AS-APERTURE-NETWORKS,AS-BASIL admin-c: SLATE79-ARIN tech-c: SLATE79-ARIN mnt-by: MNT-JS-334 created: 2022-06-25T15:38:20Z last-modified: 2023-11-03T17:17:45Z source: ARIN