These entries are queried from radb.net using whois, you can try my project getting these.
:AS400507 route: 208.64.108.0/22 descr: ChargerAccess origin: AS400507 mnt-by: MAINT-AS15008 changed: kfox [at] charger.global 20230825 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source