These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SNS-SLAV as-set: AS-SNS-SLAV descr: SNS-SLAV BGP Customers AS tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: SNSUA-MNT members: AS44416 members: AS203088 members: AS50459 members: AS51962 members: AS52180 members: AS41119 members: AS29559 members: AS205962 members: AS209914 members: AS59618 members: AS50981 members: AS56428 members: AS48730 members: AS41119 members: AS205753 members: AS206326 members: AS212621 created: 2010-11-29T18:03:54Z last-modified: 2022-04-10T11:09:55Z 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: ****************************