These entries are queried from radb.net using whois, you can try my project getting these.
:AS53263 route: 74.116.152.0/22 descr: ADDED FOR - AS53263 origin: AS53263 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20130322 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.116.152.0/22 descr: Grand Rapids Community College origin: AS53263 mnt-by: MAINT-AS237 changed: ljb [at] merit.edu 20100302 #19:09:39Z source: RADB last-modified: 2023-11-13T15:40:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.116.153.0/24 descr: ADDED FOR - AS53263 origin: AS53263 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20130322 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.116.154.0/24 descr: ADDED FOR - AS53263 origin: AS53263 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20130322 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.17.179.0/24 descr: ADDED FOR - AS53263 origin: AS53263 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20130322 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.17.179.0/24 descr: Grand Rapids Community College origin: AS53263 mnt-by: MAINT-AS237 changed: ljb [at] merit.edu 20100302 #19:09:39Z source: RADB last-modified: 2023-11-13T15:40:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source