These entries are queried from radb.net using whois, you can try my project getting these.
:AS12690 route: 212.57.96.0/20 descr: MKS Internet address block origin: AS12690 notify: noc [at] mksnet.ru mnt-by: MKS-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:33:39Z 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 route: 212.57.96.0/24 descr: MKS Specific route origin: AS12690 mnt-by: MKS-MNT created: 2006-06-14T13:38:37Z last-modified: 2006-06-14T13:38:37Z 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 route: 212.57.112.0/23 descr: MKS VoIP address block origin: AS12690 notify: noc [at] mksnet.ru mnt-by: MKS-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:33:39Z 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 route: 212.57.112.0/24 descr: MKS VoIP Network origin: AS12690 notify: noc [at] mksnet.ru mnt-by: MKS-MNT created: 2009-03-26T18:44:41Z last-modified: 2009-03-26T18:44:41Z 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 route: 212.57.114.0/24 descr: MKS-BLOCK-N origin: AS12690 mnt-by: MKS-MNT created: 2016-03-02T07:16:27Z last-modified: 2016-03-02T07:16:27Z 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 route: 212.57.117.0/24 origin: AS12690 mnt-by: MKS-MNT created: 2020-03-30T11:40:58Z last-modified: 2020-03-30T11:40:58Z 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 route: 212.57.120.0/24 origin: AS12690 mnt-by: MKS-MNT created: 2021-05-14T09:04:39Z last-modified: 2021-05-14T09:04:39Z 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 route: 212.57.121.0/24 origin: AS12690 mnt-by: MKS-MNT created: 2021-05-14T09:05:04Z last-modified: 2021-05-14T09:05:04Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 212.57.123.0/24 origin: AS12690 mnt-by: MKS-MNT created: 2021-05-14T09:05:27Z last-modified: 2021-05-14T09:05:27Z 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