These entries are queried from radb.net using whois, you can try my project getting these.
:AS-NU as-set: AS-NU tech-c: DUMY-RIPE members: AS50050 members: AS208290 admin-c: DUMY-RIPE mnt-by: NU-DOMAIN-MNT mnt-by: NU-RIPE-MNT created: 2019-01-30T15:06:09Z last-modified: 2019-09-13T14:53:29Z source: RIPE descr: NU and Customers notify: peering [at] nugmbh.de 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-NU descr: AS-Set for NU addresses members: AS7896 admin-c: MDF7-ARIN tech-c: AUDEW1-ARIN tech-c: MDF7-ARIN mnt-by: MNT-UNIVER-248 created: 2023-08-15T18:23:39Z last-modified: 2023-08-15T18:23:39Z source: ARIN