These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SSN as-set: AS-SSN descr: SSN-AS-SET tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: SSN-NCC created: 2017-04-05T05:55:19Z last-modified: 2020-10-19T06:46:10Z source: RIPE members: AS42451 members: AS61041 members: AS5387 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: ****************************