These entries are queried from radb.net using whois, you can try my project getting these.
:AS53721 route: 38.123.231.0/24 origin: AS53721 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 20211015 source: RADB last-modified: 2023-11-13T16:08:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 131.239.17.0/24 descr: Coretelligent, LLC 117 Kendrick St., Ste. 200 Needham, MA 02494 origin: AS53721 mnt-by: MAINT-AS6079 remarks: proxy-registered object for customer Direct inquiries to chris [at] coretelligent.com changed: peter.jacoby [at] rcn.net 20110512 source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.243.230.0/23 descr: Coretelligent origin: AS53721 mnt-by: MAINT-AS27506 changed: daniel.mccoon [at] crowncastle.com 20210608 source: RADB last-modified: 2023-11-13T16:05:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.243.230.0/23 origin: AS53721 descr: CoreCloud admin-c: ADMIN2529-ARIN tech-c: NOYES27-ARIN tech-c: TECH568-ARIN mnt-by: MNT-CL-19 created: 2023-09-06T20:41:17Z last-modified: 2023-09-06T20:41:17Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.243.230.0/24 origin: AS53721 descr: CoreCloud admin-c: ADMIN2529-ARIN tech-c: NOYES27-ARIN tech-c: TECH568-ARIN mnt-by: MNT-CL-19 created: 2023-09-06T20:42:06Z last-modified: 2023-09-06T20:42:06Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.243.231.0/24 origin: AS53721 descr: CoreCloud admin-c: ADMIN2529-ARIN tech-c: NOYES27-ARIN tech-c: TECH568-ARIN mnt-by: MNT-CL-19 created: 2023-09-06T20:42:50Z last-modified: 2023-09-06T20:42:50Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.138.164.0/24 origin: AS53721 descr: CoreCloud admin-c: ADMIN2529-ARIN tech-c: NOYES27-ARIN tech-c: TECH568-ARIN mnt-by: MNT-CL-19 created: 2023-09-06T20:43:11Z last-modified: 2023-09-06T20:43:11Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.138.164.0/24 descr: Coretelligent origin: AS53721 mnt-by: MAINT-AS27506 changed: daniel.mccoon [at] crowncastle.com 20211015 source: RADB last-modified: 2023-11-13T16:08:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:470:198::/48 origin: AS53721 descr: NET-2001-470-198---48-AS53721 admin-c: ZH17-ARIN tech-c: ZH17-ARIN mnt-by: MNT-HURC source: ARIN created: 2023-08-25T01:45:14Z last-modified: 2023-08-25T01:45:14Z rpki-ov-state: valid