These entries are queried from radb.net using whois, you can try my project getting these.
:AS54721 route: 23.163.128.0/24 origin: AS54721 mnt-by: MNT-NNL-33 tech-c: NNO99-ARIN admin-c: NNO99-ARIN source: ARIN created: 2020-06-18T06:43:48Z last-modified: 2020-06-18T06:43:48Z descr: MNT-NNL-33 route 023.163.128.000/24 AS54721 rpki-ov-state: valid route: 23.163.128.0/24 origin: AS54721 mnt-by: mtnr-ngen mnt-by: mtnr-nno created: 2017-05-02T17:10:16Z last-modified: 2018-09-04T18:48:53Z source: RIPE-NONAUTH 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 route: 23.163.128.0/24 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20221202 #00:35:58-18000 source: RADB last-modified: 2023-11-13T16:13:11Z rpki-ov-state: valid route: 23.163.129.0/24 origin: AS54721 descr: MNT-NNL-33 route 23.163.129.0/24 AS54721 admin-c: NNO99-ARIN tech-c: NNO99-ARIN mnt-by: MNT-NNL-33 created: 2022-06-24T20:38:29Z last-modified: 2022-06-24T20:38:29Z source: ARIN rpki-ov-state: valid route: 23.163.129.0/24 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20221202 #00:35:58-18000 source: RADB last-modified: 2023-11-13T16:13:11Z rpki-ov-state: valid route6: 2602:fef4::/36 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20190421 #17:21:01Z source: RADB last-modified: 2023-11-13T15:56:04Z rpki-ov-state: valid route6: 2602:fef4::/36 origin: AS54721 mnt-by: mtnr-ngen mnt-by: mtnr-nno created: 2017-05-01T23:04:18Z last-modified: 2018-09-04T19:45:49Z source: RIPE-NONAUTH 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: 2602:fef4::/36 origin: AS54721 mnt-by: MNT-NNL-33 tech-c: NNO99-ARIN admin-c: NNO99-ARIN source: ARIN created: 2020-06-18T06:44:26Z last-modified: 2020-06-18T06:44:26Z descr: MNT-NNL-33 route 2602:FEF4:0000:0000:0000:0000:0000:0000/36 AS54721 rpki-ov-state: valid route6: 2602:fef4::/48 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20220717 #11:48:51Z source: RADB last-modified: 2023-11-13T16:11:47Z rpki-ov-state: valid route6: 2602:fef4::/48 origin: AS54721 mnt-by: mtnr-ngen mnt-by: mtnr-nno created: 2017-05-01T23:17:38Z last-modified: 2018-09-04T19:45:49Z source: RIPE-NONAUTH 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: 2602:fef4:100::/48 origin: AS54721 mnt-by: mtnr-ngen mnt-by: mtnr-nno created: 2017-05-01T23:07:36Z last-modified: 2018-09-04T19:45:49Z source: RIPE-NONAUTH 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: 2602:fef4:200::/48 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20221210 #00:37:50-18000 source: RADB last-modified: 2023-11-13T16:13:12Z rpki-ov-state: valid route6: 2602:fef4:400::/48 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20220717 #11:48:51Z source: RADB last-modified: 2023-11-13T16:11:47Z rpki-ov-state: valid route6: 2602:fef4:500::/48 descr: Vultr Customer Route origin: AS54721 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20220807 #12:37:39Z source: RADB last-modified: 2023-11-13T16:12:05Z rpki-ov-state: valid