These entries are queried from radb.net using whois, you can try my project getting these.
:AS23299 route: 199.21.216.0/22 descr: Libeo Inc origin: AS23299 remarks: Proxy route entry added on behalf of remarks: Libeo Inc notify: backbone [at] telus.com mnt-by: MAINT-AS852 changed: routing [at] telus.com 20180502 source: RADB last-modified: 2023-11-13T15:53:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source