These entries are queried from radb.net using whois, you can try my project getting these.
:AS137937 route: 154.18.68.0/24 origin: AS137937 descr: Route Registered for Cogent Communications Customer Transaction Network Services geoidx: jp mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20210409 #13:27:46Z source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source