These entries are queried from radb.net using whois, you can try my project getting these.
:AS21549 route: 63.251.140.0/24 descr: PNAP-BSN ironmtn origin: AS21549 mnt-by: MAINT-AS1828 changed: sorch [at] internap.com 20010612 source: RADB last-modified: 2023-11-13T16:13:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.95.74.0/23 descr: PNAP-BSN ironmtn origin: AS21549 mnt-by: MAINT-AS1828 changed: sorch [at] internap.com 20010612 source: RADB last-modified: 2023-11-13T16:13:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.95.75.0/24 descr: PNAP-BSN ironmtn origin: AS21549 mnt-by: MAINT-AS1828 changed: sorch [at] internap.com 20010612 source: RADB last-modified: 2023-11-13T16:13:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 138.207.74.0/23 origin: AS21549 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 changed: ammon.guernsey [at] ironmountain.com 20211206 source: RADB last-modified: 2023-11-13T16:09:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 138.207.76.0/22 origin: AS21549 descr: Iron Mountain Corp Services Group 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 changed: ammon.guernsey [at] ironmountain.com 20211206 source: RADB last-modified: 2023-11-13T16:09:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.66.136.0/21 origin: AS21549 descr: Iron Mountain Data Centers, LLC One Federal Street Boston, MA 02111 United States ---Customer Proxy Object for upstream filter list--- admin-c: IMDC-Network Operations tech-c: IMDC-Network Operations notify: imdcnetops [at] ironmountain.com mnt-by: MAINT-AS12025 changed: ammon.guernsey [at] ironmountain.com 20211102 source: RADB last-modified: 2023-11-13T16:08:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.66.138.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:28:42Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.66.139.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:28:09Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.66.142.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:27:07Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.66.143.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:26:43Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.144.0/20 origin: AS21549 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.144.0/24 descr: PNAP-BSN ironmtn routes origin: AS21549 mnt-by: MAINT-AS1828 changed: swhitson [at] internap.com 20020222 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.145.0/24 descr: PNAP-BSN ironmtn routes origin: AS21549 mnt-by: MAINT-AS1828 changed: swhitson [at] internap.com 20020222 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.146.0/24 descr: PNAP-BSN ironmtn routes origin: AS21549 mnt-by: MAINT-AS1828 changed: swhitson [at] internap.com 20020222 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.147.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:23:36Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.149.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:23:08Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.150.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:22:28Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.152.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:14:40Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.153.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:13:52Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.154.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:13:19Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.156.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:12:46Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.157.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:12:10Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.158.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #17:11:25Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.229.159.0/24 descr: Iron mountain proxy route object origin: AS21549 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170927 #16:59:18Z source: RADB last-modified: 2023-11-13T15:51:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source