These entries are queried from radb.net using whois, you can try my project getting these.
:AS212406 route: 154.61.146.0/24 origin: AS212406 descr: Route Registered for Cogent Communications Customer - TransFICC Ltd geoidx: GB mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20210707 #08:08:06Z source: RADB last-modified: 2023-11-13T16:07:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source