These entries are queried from radb.net using whois, you can try my project getting these.
:AS-DFW as-set: AS-DFW descr: DFW LLC as-set members: AS62283 members: AS49951 members: AS210706 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: DFW-MNT created: 2016-08-01T18:08:35Z last-modified: 2021-10-15T12:55:09Z 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: ****************************