These entries are queried from radb.net using whois, you can try my project getting these.
:AS55250 route: 162.44.0.0/16 descr: Advertised on behalf of IMS Health origin: AS55250 notify: ipnoc [at] terago.ca mnt-by: MAINT-AS20161 changed: ipnoc [at] terago.ca 20151126 #21:42:09Z source: RADB last-modified: 2023-11-13T15:48:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.44.253.0/24 origin: AS55250 notify: michael.tatroe [at] iqvia.com descr: IQVIA Montreal mnt-by: MNT-IH-165 changed: michael.tatroe [at] iqvia.com 20190124 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.44.253.0/24 descr: Proxy for Allstream Customer origin: AS55250 remarks: Automated Proxy Route Entry mnt-by: MAINT-AS15290 changed: ali.zerik [at] mtsallstream.com 20151029 source: RADB last-modified: 2023-11-13T16:00:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source