These entries are queried from radb.net using whois, you can try my project getting these.
:AS53769 route: 74.116.243.0/24 origin: AS53769 descr: Iron Mountain Data Centers, LLC One Federal Street Boston, MA 02111 United States admin-c: IMDC-Network Operations tech-c: IMDC-Network Operations notify: imdcnetops [at] ironmountain.com mnt-by: MAINT-AS12025 remarks: Proxy registered by IMDC for customer changed: andrew.shappell [at] ironmountain.com 20211029 source: RADB last-modified: 2023-11-13T16:08:36Z rpki-ov-state: valid route: 74.116.243.0/24 origin: AS53769 descr: 5135 Edison Ave, Suite 4 Chino CA 91710 United States admin-c: JGU101-ARIN tech-c: NOCCA2-ARIN tech-c: ZOLGH-ARIN mnt-by: MNT-CALIF-21 created: 2021-09-15T15:38:00Z last-modified: 2021-09-16T23:56:02Z source: ARIN rpki-ov-state: valid