These entries are queried from radb.net using whois, you can try my project getting these.
:AS136923 route: 63.174.56.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.174.60.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.175.80.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.175.85.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.175.87.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.3.15.0/24 descr: Proxy route object origin: AS136923 mnt-by: MAINT-TARCAN changed: noc [at] tarcan.org.uk 20230505 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source