These entries are queried from radb.net using whois, you can try my project getting these.
:AS395366 route: 156.109.0.0/16 origin: AS395366 descr: route object for Mckinsey mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20200318 #03:44:04Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.4.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T13:58:29Z last-modified: 2023-08-28T13:58:29Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.4.0/24 origin: AS395366 descr: Route object for McKinsey & Company, Inc mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20200319 #04:22:37Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.18.0/24 origin: AS395366 descr: Route object for McKinsey & Company, Inc mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20200319 #04:24:28Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.47.0/24 origin: AS395366 descr: Mckinsey Route object mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20190911 #18:08:47Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.67.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:07:33Z last-modified: 2023-08-28T14:07:33Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.67.0/24 origin: AS395366 descr: Route object for McKinsey & Company, Inc mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20200319 #04:28:09Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.74.0/24 origin: AS395366 descr: Mckinsey & Company mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20191120 #06:48:49Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.147.0/24 origin: AS395366 descr: Route object for McKinsey & Company, Inc mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20200319 #04:28:44Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.147.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:11:34Z last-modified: 2023-08-28T14:11:34Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.2.0/24 descr: Mckinsey & Company origin: AS395366 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170225 #11:38:16Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.2.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:13:50Z last-modified: 2023-08-28T14:13:50Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.3.0/24 descr: Mckinsey & Company origin: AS395366 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170203 #04:19:19Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.4.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:15:01Z last-modified: 2023-08-28T14:15:01Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.4.0/24 descr: Mckinsey & Company origin: AS395366 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170113 #02:55:25Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.29.0/24 origin: AS395366 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190520 #11:38:52Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.51.0/24 descr: Mckinsey proxy route object origin: AS395366 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20180919 #01:56:08Z source: RADB last-modified: 2023-11-13T15:54:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.52.0/24 origin: AS395366 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20210126 #16:43:12Z source: RADB last-modified: 2023-11-13T16:03:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.67.0/24 descr: Mckinsey & Company route object origin: AS395366 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20180917 #15:05:04Z source: RADB last-modified: 2023-11-13T15:54:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.67.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:16:46Z last-modified: 2023-08-28T14:16:46Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.68.0/24 origin: AS395366 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190521 #07:12:45Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.69.0/24 origin: AS395366 descr: McKinsey & Company notify: os_ns [at] mckinsey.com mnt-by: MAINT-AS31547 changed: anukool_mehta [at] mckinsey.com 20210114 #17:31:10Z source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.73.0/24 descr: Mckinsey & Company origin: AS395366 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170719 #10:58:28Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.147.0/24 descr: Mckinsey & Company origin: AS395366 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170113 #02:56:44Z source: RADB last-modified: 2023-11-13T16:00:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.147.0/24 origin: AS395366 descr: McKinsey & Company, inc. admin-c: SMIRN32-ARIN tech-c: MM2435-ARIN tech-c: SMIRN32-ARIN tech-c: SUKHI1-ARIN mnt-by: MNT-MCKINS-Z created: 2023-08-28T14:17:37Z last-modified: 2023-08-28T14:17:37Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.191.254.0/24 origin: AS395366 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20210408 #23:50:30Z source: RADB last-modified: 2023-11-13T16:05:28Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source