These entries are queried from radb.net using whois, you can try my project getting these.
:AS8970 route: 156.17.0.0/16 descr: WASK origin: AS8970 notify: registry [at] wask.wroc.pl mnt-lower: AS8970-MNT mnt-routes: AS8970-MNT mnt-by: AS8970-MNT created: 1970-01-01T00:00:00Z last-modified: 2006-09-01T08:54:12Z 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 route6: 2001:a48::/32 origin: AS8970 mnt-by: AS8970-MNT created: 2021-06-21T12:03:53Z last-modified: 2021-06-21T12:03:53Z 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