These entries are queried from radb.net using whois, you can try my project getting these.
:AS17963 route: 218.244.96.0/19 descr: Net263 group in China origin: AS17963 mnt-by: MAINT-as17963 changed: haixia.zhao [at] net263.com 20030724 changed: haixia.zhao [at] net263.com 20040727 #02:02:15(UTC) source: RADB last-modified: 2023-11-13T15:39:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source