These entries are queried from radb.net using whois, you can try my project getting these.
:AS18743 route: 208.49.26.0/24 descr: PNAP-CHG ussignal origin: AS18743 mnt-by: MAINT-AS1828 changed: dmbogo [at] internap.com 20070105 source: RADB last-modified: 2023-11-13T16:13:56Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source