These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CUSTOMERS as-set: AS-Customers descr: NDCC AS Customers members: AS33554, AS35981, AS35943, AS30081, AS33510, AS13657:AS-EGATE, AS10678, AS30528, AS10568, AS36722, AS9327, AS33361, AS18987, AS30085, AS13773, AS36689 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20170321 #17:37:06Z source: RADB as-set: AS-CUSTOMERS descr: WWWGBG and customer ASNs members: AS41136 members: AS29602 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: WWWGBG-MNT created: 2007-02-28T10:18:28Z last-modified: 2007-02-28T10:34:19Z 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-CUSTOMERS descr: iUplink.net descr: 199 Bay St - SUITE 1900 descr: Toronto, Ontario M5L 1E2 descr: CA members: AS62782 admin-c: DUMY-ARIN tech-c: DUMY-ARIN mnt-by: MNT-OL-56 changed: noc [at] iuplink.net 20150112 source: ARIN remarks: **************************** remarks: * THIS OBJECT CONTAINS PLACEHOLDER DATA 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 ARIN Database at: remarks: * http://www.arin.net/whois remarks: ****************************