These entries are queried from radb.net using whois, you can try my project getting these.
:AS-MNS as-set: AS-MNS descr: Markley Group 1 Summer Street Boston MA 02110 United States 1.833.299.1528 mns-support [at] markleygroup.com https://markleygroup.com members: AS-MNS:AS-BOS,AS-MNS:AS-LOW,AS-MNS:AS-ASH admin-c: MNSAD-ARIN tech-c: MNSTE-ARIN mnt-by: MNT-MNSL-7 created: 2024-04-23T16:10:33Z last-modified: 2024-04-23T16:19:05Z source: ARIN as-set: AS-MNS descr: MediaNetwork Services and customers members: AS44654 members: AS48376 members: AS16065 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: MNT-MNS created: 2008-03-06T11:07:19Z last-modified: 2022-04-21T10:37:44Z 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: ****************************