These entries are queried from radb.net using whois, you can try my project getting these.
:AS138330 route6: 2a12:a307:1::/48 origin: AS138330 mnt-by: cat-mnt created: 2022-03-11T11:48:04Z last-modified: 2022-03-11T11:48:04Z 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: 2a12:a307:1::/48 origin: AS138330 descr: Customer mnt-by: MAINT-AS9312 changed: david [at] xtom.com 20220311 #11:51:45Z source: RADB last-modified: 2023-11-13T16:10:08Z rpki-ov-state: valid route6: 2a12:a307:1::/48 origin: AS138330 source: ALTDB mnt-by: MAINT-AS206499 descr: xTom V.PS Customer route changed: noc [at] m-m-networks.net 20220905 rpki-ov-state: valid