These entries are queried from radb.net using whois, you can try my project getting these.
:AS40808 route: 204.239.248.0/22 descr: Proxy Addition remarks: Added by Shaw on behalf of customer origin: AS40808 notify: ipadmin-sbs [at] sjrb.ca mnt-by: MAINT-AS6327 changed: ipadmin-sbs [at] sjrb.ca 20100223 source: RADB last-modified: 2024-03-05T21:00:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.239.248.0/24 descr: NET-204-239-248-0-1 origin: AS40808 remarks: Proxy route on behalf of Vancouver International Airport Authority mnt-by: MAINT-AS852 notify: backbone [at] telus.com changed: abuse [at] telus.com 20160629 source: RADB last-modified: 2023-11-13T15:49:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.239.249.0/24 descr: NET-204-239-248-0-1 origin: AS40808 remarks: Proxy route on behalf of Vancouver International Airport Authority mnt-by: MAINT-AS852 notify: backbone [at] telus.com changed: abuse [at] telus.com 20160629 source: RADB last-modified: 2023-11-13T15:49:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.239.250.0/24 descr: Proxy Addition remarks: Added by Shaw on behalf of customer origin: AS40808 notify: ipadmin-sbs [at] sjrb.ca mnt-by: MAINT-AS6327 changed: ipadmin-sbs [at] sjrb.ca 20100223 source: RADB last-modified: 2024-03-05T21:00:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.239.251.0/24 descr: NET-204-239-248-0-1 origin: AS40808 remarks: Proxy route on behalf of Vancouver International Airport Authority mnt-by: MAINT-AS852 notify: backbone [at] telus.com changed: abuse [at] telus.com 20160629 source: RADB last-modified: 2023-11-13T15:49:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.239.252.0/23 descr: Proxy Addition remarks: Added by Shaw on behalf of customer origin: AS40808 notify: ipadmin-sbs [at] sjrb.ca mnt-by: MAINT-AS6327 changed: ipadmin-sbs [at] sjrb.ca 20100223 source: RADB last-modified: 2024-03-05T21:00:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source