These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SET-QUADRANET as-set: AS-SET-QUADRANET descr: AS Set announced by QuadraNet members: AS-QUADRANET,AS-ASSERTIVE,AS-QUADRANET-CUSTOMERS,AS-QUADRANET-CUSTOMER-ASSET mnt-by: MAINT-AS8100 changed: kate [at] quadranet.com 20110728 #21:08:35Z source: RADB last-modified: 2023-11-13T15:47:05Z