These entries are queried from radb.net using whois, you can try my project getting these.
:AS36703 route: 208.84.144.0/24 origin: AS36703 descr: proxy route for AMT by CORESITE admin-c: REEDC55-ARIN tech-c: REEDC55-ARIN notify: netops [at] coresite.com mnt-by: MAINT-AS2734 changed: chris.reed [at] coresite.com 20230130 #19:44:57Z source: RADB last-modified: 2023-11-13T16:17:50Z rpki-ov-state: valid route: 208.84.144.0/24 origin: AS36703 descr: AMT admin-c: JFA116-ARIN tech-c: CMM8-ARIN tech-c: DISNE6-ARIN tech-c: JENSE37-ARIN tech-c: JFA116-ARIN tech-c: REEDC55-ARIN tech-c: STANL503-ARIN mnt-by: MNT-COWIL created: 2024-04-20T03:12:53Z last-modified: 2024-04-20T03:12:53Z source: ARIN rpki-ov-state: valid