These entries are queried from radb.net using whois, you can try my project getting these.
:AS63334 route: 23.143.216.0/24 origin: AS63334 descr: https://www.altinc.ca Available 24x7 member-of: AS63334:RS-ROUTES admin-c: MITCH909-ARIN tech-c: MITCH909-ARIN mnt-by: MNT-NL-624 created: 2022-11-22T16:13:28Z last-modified: 2022-11-22T16:13:28Z source: ARIN rpki-ov-state: valid route: 23.143.216.0/24 origin: AS63334 descr: ALT-IPv4-HFX mnt-by: MAINT-AS21659 changed: jon [at] altinc.ca 20240122 # 1510Z source: RADB last-modified: 2024-01-22T15:10:03Z rpki-ov-state: valid route: 204.145.88.0/24 descr: Atlantic Metro Communications 4 Century Drive Suite 102 Parsippany, NJ 07054 USA origin: AS63334 mnt-by: MAINT-AS29838 changed: irr [at] atlanticmetro.net 20160519 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fdd2:400::/38 origin: AS63334 descr: Alt Telecom Halifax mnt-by: MAINT-AS21659 changed: noc [at] altinc.ca 20240206 # 2338Z source: RADB last-modified: 2024-02-06T23:38:40Z rpki-ov-state: valid