These entries are queried from radb.net using whois, you can try my project getting these.
:AS51028 route: 91.213.44.0/24 descr: LLC Zummer origin: AS51028 notify: admin [at] svols.com mnt-by: SVOLS-MNT created: 2017-08-16T08:52:15Z last-modified: 2023-03-24T09:15:44Z 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: 91.239.42.0/24 descr: LLC Zummer origin: AS51028 notify: admin [at] svols.com mnt-by: SVOLS-MNT created: 2017-12-11T09:31:55Z last-modified: 2023-03-24T09:14:10Z 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: 178.216.152.0/21 descr: LLC Zummer origin: AS51028 notify: admin [at] svols.com mnt-by: SVOLS-MNT created: 2010-05-19T14:54:44Z last-modified: 2021-10-29T03:26:53Z 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: 178.216.152.0/22 descr: LLC Zummer origin: AS51028 notify: k0106ock [at] gmail.com mnt-by: SVOLS-MNT created: 2011-12-07T07:29:41Z last-modified: 2021-10-29T03:27:15Z 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: 178.216.156.0/22 descr: LLC Zummer origin: AS51028 notify: k0106ock [at] gmail.com mnt-by: SVOLS-MNT created: 2011-12-07T07:31:20Z last-modified: 2021-10-29T03:27:54Z 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: 195.2.206.0/23 descr: LLC Zummer origin: AS51028 remarks: mnt-by: zummer-mnt mnt-by: SVOLS-MNT created: 2022-11-10T13:50:25Z last-modified: 2022-11-10T13:50:25Z 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: 2a03:5a00:e::/48 descr: Zummer LLC origin: AS51028 mnt-by: SVOLS-MNT created: 2012-11-13T06:40:02Z last-modified: 2019-09-26T05:14:16Z 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: 2a03:5a07::/32 descr: Zummer LLC origin: AS51028 mnt-by: SVOLS-MNT created: 2013-05-13T08:47:08Z last-modified: 2019-09-26T05:13:54Z 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