These entries are queried from radb.net using whois, you can try my project getting these.
:AS397349 route: 23.129.208.0/24 descr: Mutable IPv4 Block origin: AS397349 mnt-by: MNT-MUTAB changed: noc [at] mutable.io 20200412 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:13e:a000::/40 descr: Mutable IPv6 Block origin: AS397349 mnt-by: MNT-MUTAB changed: noc [at] mutable.io 20200412 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:13e:a000::/48 descr: Mutable IPv6 Block origin: AS397349 mnt-by: MNT-MUTAB changed: noc [at] mutable.io 20200412 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a10:ac40::/40 origin: AS397349 mnt-by: mnt-us-mutable-1 created: 2021-10-14T10:36:36Z last-modified: 2021-10-14T10:36:36Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a10:ac40:3::/48 origin: AS397349 mnt-by: mnt-us-mutable-1 created: 2021-11-08T21:52:52Z last-modified: 2021-11-08T21:52:52Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a10:ac41::/40 origin: AS397349 mnt-by: mnt-us-mutable-1 created: 2021-12-02T15:18:13Z last-modified: 2021-12-02T15:18:13Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a10:ac41:dd00::/40 origin: AS397349 mnt-by: mnt-us-mutable-1 created: 2021-11-18T16:57:21Z last-modified: 2021-11-18T16:57:21Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a10:ac47::/48 origin: AS397349 mnt-by: mnt-us-mutable-1 created: 2021-10-15T14:10:29Z last-modified: 2021-10-15T14:10:29Z 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: not_found # No ROAs found, or RPKI validation not enabled for source