These entries are queried from radb.net using whois, you can try my project getting these.
:AS31547 route: 156.109.0.0/16 descr: Infonet for Mckinsey Europe origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2004-07-08T19:01:03Z last-modified: 2018-09-04T15:41:26Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.1.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2006-01-31T19:59:38Z last-modified: 2018-09-04T15:45:56Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.2.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2007-02-23T19:28:19Z last-modified: 2018-09-04T15:48:32Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.3.0/24 origin: AS31547 descr: Mckinsey & Company mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20210521 #12:31:49Z source: RADB last-modified: 2023-11-13T16:05:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.4.0/24 origin: AS31547 mnt-by: SMIRN32-RIPE mnt-by: MCKINSEY-EUROPE created: 2016-09-15T11:11:18Z last-modified: 2018-09-04T18:32:23Z source: RIPE-NONAUTH descr: McKinsey & Company remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.7.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-01-31T20:02:59Z last-modified: 2018-09-04T15:45:56Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.8.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-02-07T18:40:22Z last-modified: 2018-09-04T15:46:01Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.9.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-02-07T18:41:25Z last-modified: 2018-09-04T15:46:01Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.10.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2005-08-02T16:44:28Z last-modified: 2018-09-04T15:44:23Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.14.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2006-03-03T22:29:32Z last-modified: 2018-09-04T15:46:14Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.14.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.15.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.15.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2006-03-03T22:30:40Z last-modified: 2018-09-04T15:46:14Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.16.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2006-03-03T22:31:23Z last-modified: 2018-09-04T15:46:14Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.16.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.18.0/24 origin: AS31547 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: 2023-08-28T14:23:57Z last-modified: 2023-08-28T14:23:57Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.18.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-06-22T19:27:01Z last-modified: 2018-09-04T15:47:27Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.22.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-08-09T16:06:20Z last-modified: 2018-09-04T15:47:38Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.23.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-08-09T16:10:45Z last-modified: 2018-09-04T15:47:39Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.24.0/23 origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2016-11-03T17:32:05Z last-modified: 2018-09-04T18:34:26Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.24.0/23 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.26.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.26.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-06-22T19:30:36Z last-modified: 2018-09-04T15:47:28Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.32.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:53:20Z 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: 156.109.33.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:53:42Z 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: 156.109.34.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:54:10Z 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: 156.109.35.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:54:31Z 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: 156.109.40.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.40.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2006-05-04T17:51:17Z last-modified: 2018-09-04T15:47:15Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.41.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: MCKINSEY-EUROPE created: 2006-07-17T19:14:32Z last-modified: 2018-09-04T15:47:33Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.43.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:52:47Z 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: 156.109.46.0/24 descr: MCKINSEY-IP-BLOCK-EU origin: AS31547 mnt-by: mckinsey-europe created: 2008-12-22T20:10:37Z last-modified: 2018-09-04T15:55:41Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.46.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.68.0/24 origin: AS31547 descr: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20220407 #18:17:32Z source: RADB last-modified: 2023-11-13T16:10:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.68.0/24 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS31547 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.78.0/24 descr: Mckinsey & Company origin: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20170106 #13:25:04Z 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: 156.109.78.0/24 origin: AS31547 mnt-by: SMIRN32-RIPE mnt-by: MCKINSEY-EUROPE created: 2016-09-15T11:16:01Z last-modified: 2018-09-04T18:32:24Z source: RIPE-NONAUTH descr: McKinsey & Company remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.94.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190215 #17:01:50Z 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: 156.109.95.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190218 #14:52:15Z 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: 156.109.113.0/24 origin: AS31547 descr: AS31547 mnt-by: MAINT-AS31547 changed: os_ns [at] mckinsey.com 20220407 #18:16:20Z source: RADB last-modified: 2023-11-13T16:10:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.113.0/24 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS31547 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.129.0/24 origin: AS31547 mnt-by: MCKINSEY-EUROPE mnt-by: mckinsey_noc created: 2016-11-03T17:35:07Z last-modified: 2018-09-04T18:34:26Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.193.0/24 origin: AS31547 descr: McKinsey & Company mnt-by: MAINT-AS31547 changed: evgeny_smirnov [at] mckinsey.com 20190430 #18:51:39Z 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: 156.109.218.0/24 origin: AS31547 mnt-by: mckinsey_noc mnt-by: MCKINSEY-EUROPE created: 2018-04-25T07:14:36Z last-modified: 2018-09-04T19:12:18Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 156.109.219.0/24 origin: AS31547 mnt-by: mckinsey_noc mnt-by: MCKINSEY-EUROPE created: 2018-04-25T07:17:50Z last-modified: 2018-09-04T19:12:19Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source