These entries are queried from radb.net using whois, you can try my project getting these.
:AS20052 route: 146.88.240.0/20 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20171120 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.88.240.0/24 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.88.240.0/24 descr: ASERT Network Security Research origin: AS20052 mnt-by: MAINT-AS20052 changed: sryan [at] arbor.net 20180515 #14:27:53Z source: RADB last-modified: 2023-11-13T15:53:40Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.192.0/20 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20150724 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.192.0/20 descr: Arbor Networks, Inc. origin: AS20052 mnt-by: MAINT-AS20052 changed: sryan [at] arbor.net 20180202 #17:04:24Z source: RADB last-modified: 2023-11-13T15:53:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.192.0/21 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.200.0/22 descr: ADDED FOR - AS20052 origin: AS20052 mnt-by: I123-MNT changed: rpd [at] 123.net 20101019 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.200.0/23 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.202.0/24 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.204.0/22 descr: ADDED FOR - AS20052 origin: AS20052 mnt-by: I123-MNT changed: rpd [at] 123.net 20101019 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.130.204.0/24 descr: ADDED FOR - AS20052 origin: AS20052 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:11e:1000::/44 descr: ADDED FOR - AS20052 origin: AS20052 notify: rpd [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20150206 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:11e:1000::/44 descr: Arbor Networks, Inc. origin: AS20052 mnt-by: MAINT-AS20052 changed: sryan [at] arbor.net 20180202 #17:06:32Z source: RADB last-modified: 2023-11-13T15:53:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source