These entries are queried from radb.net using whois, you can try my project getting these.
:AS-PX9 as-set: as-px9 members: AS42607 members: AS41564 members: AS57858 members: AS57972 members: AS37518 members: AS60485 members: AS205056 members: AS41204 members: AS204353 members: AS48950 members: AS64435 members: AS61133 members: AS63119 members: AS46805 members: AS58065 members: AS46805 members: AS212868 members: as-hc49 members: as-globalipexchnage7 members: AS-NSC tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: mnt-packetxchange3 created: 2017-11-20T16:19:43Z last-modified: 2023-10-31T11:29:07Z 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-PX9 descr: PX members: AS41564 members: AS58065 members: AS42607 members: AS57858 members: AS57972 members: AS60485 members: AS37518 members: AS204353 members: AS41204 members: AS48950 members: AS64435 members: AS61133 members: as-globalipexchnage7 members: AS46805 members: AS52219 members: AS63119 members: AS46805 mnt-by: MAINT-OIX1 changed: noc1 [at] openinternetexchange.net 20200616 #09:35:36Z source: RADB last-modified: 2023-11-13T16:00:59Z