These entries are queried from radb.net using whois, you can try my project getting these.
:AS823 route: 129.100.0.0/16 origin: AS823 descr: University of Western Ontario - IPv4 admin-c: NOC310-ARIN tech-c: NOC310-ARIN notify: noc [at] uwo.ca mnt-by: MAINT-AS823 changed: egibson [at] uwo.ca 20210217 #21:09:11Z source: RADB last-modified: 2023-11-13T16:03:38Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.0.0/16 descr: University of Western Ontario Prefix origin: AS823 notify: noc [at] orion.on.ca mnt-by: ORANO-MNT created: 2024-03-19T18:31:14Z last-modified: 2024-03-19T18:31:14Z source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.0.0/17 descr: University of Western Ontario Prefix origin: AS823 notify: noc [at] orion.on.ca mnt-by: ORANO-MNT created: 2024-03-19T18:31:44Z last-modified: 2024-03-19T18:31:44Z source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.0.0/18 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20131214 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.0.0/24 origin: AS823 descr: University of Western Ontario admin-c: NOC310-ARIN tech-c: NOC310-ARIN notify: noc [at] uwo.ca mnt-by: MAINT-AS823 changed: egibson [at] uwo.ca 20210219 #15:50:40Z source: RADB last-modified: 2023-11-13T16:03:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.64.0/20 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20131214 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.80.0/21 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20131214 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.88.0/21 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20131214 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.96.0/19 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20131214 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.128.0/18 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20140114 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.128.0/18 descr: University of Western Ontario Prefix origin: AS823 notify: noc [at] orion.on.ca mnt-by: ORANO-MNT created: 2024-03-19T18:32:14Z last-modified: 2024-03-19T18:32:14Z source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.192.0/18 descr: Proxy for Allstream Customer origin: AS823 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20140217 source: RADB last-modified: 2023-11-13T16:00:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.192.0/19 descr: University of Western Ontario Prefix origin: AS823 notify: noc [at] orion.on.ca mnt-by: ORANO-MNT created: 2024-03-19T18:32:44Z last-modified: 2024-03-19T18:32:44Z source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.100.224.0/19 descr: University of Western Ontario Prefix origin: AS823 notify: noc [at] orion.on.ca mnt-by: ORANO-MNT created: 2024-03-19T18:33:14Z last-modified: 2024-03-19T18:33:14Z source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source