These entries are queried from radb.net using whois, you can try my project getting these.
:AS52023 route: 37.143.162.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-14T09:06:22Z last-modified: 2016-09-14T09:06:22Z 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: 37.143.163.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-14T09:07:43Z last-modified: 2016-09-14T09:07:43Z 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: 37.143.164.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-14T09:08:40Z last-modified: 2016-09-14T09:08:40Z 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: 37.143.165.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-15T13:17:47Z last-modified: 2016-09-15T13:17:47Z 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: 37.143.166.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-15T13:18:39Z last-modified: 2016-09-15T13:18:39Z 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: 37.143.167.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-14T09:10:47Z last-modified: 2016-09-14T09:10:47Z 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: 37.143.170.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2016-09-13T13:00:13Z last-modified: 2023-10-01T08:46:01Z 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: 37.143.171.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2023-06-07T14:26:24Z last-modified: 2023-06-07T14:26:24Z 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: 37.143.172.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2023-06-07T14:28:01Z last-modified: 2023-06-07T14:28:01Z 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: 91.212.148.0/24 descr: OPTICNET-DUCADU origin: AS52023 mnt-by: OPTICNET-MNT created: 2017-04-24T11:04:44Z last-modified: 2017-04-24T11:05:05Z 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: 193.32.141.0/24 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2023-04-23T09:10:26Z last-modified: 2023-04-23T09:10:26Z 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 route: 193.32.142.0/23 descr: DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2023-04-23T09:11:11Z last-modified: 2023-04-23T09:11:11Z 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 route6: 2a03:8f84::/32 descr: OPTICNET-DUCADU-CLOUD origin: AS52023 mnt-by: OPTICNET-MNT created: 2018-05-30T11:29:47Z last-modified: 2018-05-30T11:29:47Z 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