These entries are queried from radb.net using whois, you can try my project getting these.
:AS60028 route: 31.148.4.0/24 origin: AS60028 mnt-by: MNT-ALATYR mnt-by: RIPE-DB-MNT created: 2014-06-24T17:01:53Z last-modified: 2022-11-30T14:58:22Z 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