These entries are queried from radb.net using whois, you can try my project getting these.
:AS59345 route: 50.93.129.0/24 origin: AS59345 descr: NEX Markets Legacy public IP Block AP admin-c: CMEAR-ARIN tech-c: CMEAR-ARIN notify: david.spiker [at] cmegroup.com mnt-by: MAINT-CME changed: david.spiker [at] cmegroup.com 20210916 #14:16:32Z source: RADB last-modified: 2023-11-13T16:08:13Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.246.140.0/22 origin: AS59345 descr: CME Group - FWD admin-c: CMEAR-ARIN tech-c: CMEAR-ARIN notify: carl.stinson [at] cmegroup.com mnt-by: MAINT-CME changed: carl.stinson [at] cmegroup.com 20210412 #17:27:24Z source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.246.140.0/24 origin: AS59345 descr: CME Group - FWD AP admin-c: CMEAR-ARIN tech-c: CMEAR-ARIN mnt-by: MAINT-CME changed: carl.stinson [at] cmegroup.com 20210412 #17:17:49Z source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.246.141.0/24 origin: AS59345 descr: CME Group - FWD US admin-c: CMEAR-ARIN tech-c: CMEAR-ARIN notify: carl.stinson [at] cmegroup.com mnt-by: MAINT-CME changed: carl.stinson [at] cmegroup.com 20210412 #17:17:20Z source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.246.142.0/24 origin: AS59345 descr: CME Group - FWD EU admin-c: CMEAR-ARIN tech-c: CMEAR-ARIN notify: carl.stinson [at] cmegroup.com mnt-by: MAINT-CME changed: carl.stinson [at] cmegroup.com 20210412 #17:19:15Z source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source