These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CLOUDFLARE as-set: AS-CLOUDFLARE descr: tech-c: CTC17-AP admin-c: CTC17-AP mnt-by: MAINT-CLOUDFLARE-AP last-modified: 2022-11-17T09:12:22Z members: AS13335 members: AS13335:AS-CUSTOMERS members: AS14789 members: AS132892 members: AS133877 members: AS202623 members: AS209242 members: AS394536 source: APNIC as-set: AS-CLOUDFLARE descr: Cloudflare, Inc descr: 101 Townsend Street, San Francisco descr: California 94107, US descr: +1-650-319-8930 members: AS13335 members: AS13335:AS-CUSTOMERS members: AS14789 members: AS132892 members: AS133877 members: AS202623 members: AS209242 members: AS394536 remarks: --------------- remarks: Cloudflare announces its ASNs via many upstream ASNs remarks: All Cloudflare abuse reporting can be done via remarks: https://www.cloudflare.com/abuse remarks: --------------- tech-c: CLOUD146-ARIN admin-c: ADMIN2521-ARIN mnt-by: MNT-CLOUD14 source: ARIN created: 2020-06-10T04:00:00Z last-modified: 2021-07-15T17:10:44Z as-set: AS-CLOUDFLARE tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: MNT-CLOUDFLARE created: 2022-11-17T08:47:47Z last-modified: 2022-11-17T08:51:43Z source: RIPE members: AS13335 members: AS13335:AS-CUSTOMERS members: AS14789 members: AS132892 members: AS133877 members: AS202623 members: AS209242 members: AS394536 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: ****************************