These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SETs as-set: AS-SETS descr: xTom tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: xtom created: 2021-07-06T13:58:50Z last-modified: 2021-07-06T13:58:50Z 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-SETS descr: xTom tech-c: XDN3-RIPE admin-c: XDN3-RIPE mnt-by: MAINT-AS9312 changed: david [at] xtom.com 20210706 source: RADB last-modified: 2023-11-13T16:07:50Z