These entries are queried from radb.net using whois, you can try my project getting these.
:AS48143 route: 91.207.132.0/23 descr: Mirantis Inc. origin: AS48143 mnt-by: MIRANTIS-MNT created: 2008-11-10T10:04:51Z last-modified: 2008-11-10T10:04:51Z source: RIPE 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: valid route: 91.218.144.0/22 descr: Mirantis Inc. origin: AS48143 mnt-by: MIRANTIS-MNT notify: noc [at] mirantis.com created: 2010-07-27T14:43:13Z last-modified: 2011-03-04T08:56:32Z source: RIPE 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: valid route: 91.218.144.0/23 descr: Mirantis Inc. origin: AS48143 mnt-by: MIRANTIS-MNT notify: noc [at] mirantis.com created: 2010-07-27T14:41:36Z last-modified: 2011-03-04T08:58:00Z source: RIPE 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: valid route: 91.218.146.0/23 descr: Mirantis Inc./GridDynamics origin: AS48143 mnt-by: MIRANTIS-MNT created: 2010-08-26T12:04:56Z last-modified: 2010-08-26T12:04:56Z source: RIPE 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: valid route: 91.218.146.0/24 origin: AS48143 mnt-by: MIRANTIS-MNT created: 2021-07-26T13:42:12Z last-modified: 2021-07-26T13:42:12Z source: RIPE 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: valid route: 91.218.146.0/25 origin: AS48143 mnt-by: MIRANTIS-MNT created: 2021-08-06T06:38:38Z last-modified: 2021-08-06T06:38:38Z source: RIPE 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: valid route: 91.218.146.128/25 origin: AS48143 mnt-by: MIRANTIS-MNT created: 2021-08-06T06:39:57Z last-modified: 2021-08-06T06:39:57Z source: RIPE 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: valid route: 194.213.110.0/23 descr: Mirantis Inc. origin: AS48143 mnt-by: MIRANTIS-MNT notify: noc [at] mirantis.com created: 2010-07-28T07:00:29Z last-modified: 2011-03-04T11:02:26Z source: RIPE 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: valid