These entries are queried from radb.net using whois, you can try my project getting these.
:AS51968 route: 46.23.128.0/20 descr: CZ-NEOS-20101208 origin: AS51968 mnt-by: MNT-PCNEOS created: 2010-12-08T21:24:28Z last-modified: 2010-12-08T21:24:28Z 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: 46.23.136.0/24 descr: CZ-NEOS-20101208 origin: AS51968 mnt-by: MNT-PCNEOS created: 2021-12-07T09:18:06Z last-modified: 2021-12-07T09:18:06Z 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: 2a10:2880::/32 origin: AS51968 mnt-by: MNT-PCNEOS created: 2020-02-25T12:16:26Z last-modified: 2020-02-25T12:16:26Z 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