These entries are queried from radb.net using whois, you can try my project getting these.
:AS51538 route: 81.28.244.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:03:58Z last-modified: 2021-04-08T20:03:58Z 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: 81.28.245.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:04:24Z last-modified: 2021-04-08T20:04:24Z 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: 81.28.246.0/23 origin: AS51538 mnt-by: TEKCOM-MNT mnt-by: MNT-TEKCOM created: 2019-09-26T20:46:13Z last-modified: 2019-09-26T20:46:32Z 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: 81.28.246.0/24 origin: AS51538 mnt-by: TEKCOM-MNT mnt-by: MNT-TEKCOM created: 2019-09-26T20:47:53Z last-modified: 2019-09-26T20:47:53Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 81.28.247.0/24 origin: AS51538 mnt-by: TEKCOM-MNT mnt-by: MNT-TEKCOM created: 2019-09-26T20:48:41Z last-modified: 2019-09-26T20:48:41Z 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: 185.246.180.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:05:15Z last-modified: 2021-04-08T20:05:15Z 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: 185.246.181.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:05:37Z last-modified: 2021-04-08T20:05:37Z 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: 185.246.182.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:06:07Z last-modified: 2021-04-08T20:06:07Z 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: 185.246.183.0/24 origin: AS51538 mnt-by: TEKCOM-MNT created: 2021-04-08T20:06:33Z last-modified: 2021-04-08T20:06:33Z 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