These entries are queried from radb.net using whois, you can try my project getting these.
:AS34939 route: 23.247.212.0/24 origin: AS34939 descr: NextDNS NYC-1 admin-c: NEXTD-ARIN tech-c: NEXTD-ARIN mnt-by: MNT-NEXTD-22 created: 2021-10-08T20:23:17Z last-modified: 2021-10-08T20:23:17Z source: ARIN rpki-ov-state: valid route: 23.247.213.0/24 origin: AS34939 descr: NextDNS CHI-1 admin-c: NEXTD-ARIN tech-c: NEXTD-ARIN mnt-by: MNT-NEXTD-22 created: 2021-10-08T20:24:26Z last-modified: 2021-10-08T20:25:44Z source: ARIN rpki-ov-state: valid route: 23.247.214.0/24 origin: AS34939 descr: NextDNS LAX-1 admin-c: NEXTD-ARIN tech-c: NEXTD-ARIN mnt-by: MNT-NEXTD-22 created: 2021-10-08T20:26:20Z last-modified: 2021-10-08T20:26:20Z source: ARIN rpki-ov-state: valid route: 23.247.215.0/24 origin: AS34939 descr: NextDNS DAL-1 admin-c: NEXTD-ARIN tech-c: NEXTD-ARIN mnt-by: MNT-NEXTD-22 created: 2021-10-08T20:27:02Z last-modified: 2021-10-08T20:27:02Z source: ARIN rpki-ov-state: valid route: 45.90.28.0/22 origin: AS34939 descr: nextdns.Inc mnt-by: MAINT-AS33480 changed: nikhil [at] webwerks.com 20190709 #10:49:37Z source: RADB last-modified: 2023-11-13T16:18:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.90.28.0/22 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-06-25T20:35:21Z last-modified: 2021-07-16T16:56:57Z 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: 45.90.28.0/23 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:20:25Z last-modified: 2021-07-16T16:57:10Z 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: valid route: 45.90.28.0/24 descr: Customer Route - LOA provided origin: AS34939 mnt-by: MAINT-AS134823 changed: soc [at] imcloud.tw 20200819 #13:00:00Z source: RADB last-modified: 2023-11-13T16:01:33Z rpki-ov-state: valid route: 45.90.28.0/24 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:20:54Z last-modified: 2021-10-07T13:10:53Z source: RIPE descr: NextDNS Primary Anycast 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: 45.90.29.0/24 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:21:25Z last-modified: 2021-07-16T16:57:46Z 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: valid route: 45.90.29.0/24 origin: AS34939 descr: AS34939 mnt-by: MAINT-AS134835 changed: contact [at] gbpshk.com 20190919 #08:39:37Z source: RADB last-modified: 2023-11-13T15:57:46Z rpki-ov-state: valid route: 45.90.30.0/23 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:21:46Z last-modified: 2021-07-16T16:57:59Z 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: valid route: 45.90.30.0/23 descr: Vultr Customer Route origin: AS34939 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20190629 #22:27:09Z source: RADB last-modified: 2023-11-13T15:56:41Z rpki-ov-state: valid route: 45.90.30.0/24 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:23:17Z last-modified: 2021-10-07T13:11:59Z source: RIPE descr: NextDNS Secondary Anycast 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: 45.90.30.0/24 origin: AS34939 descr: AS34939 mnt-by: MAINT-AS134835 changed: contact [at] gbpshk.com 20190919 #08:39:55Z source: RADB last-modified: 2023-11-13T15:57:46Z rpki-ov-state: valid route: 45.90.31.0/24 origin: AS34939 descr: AS34939 mnt-by: MAINT-AS134835 changed: contact [at] gbpshk.com 20190919 #08:40:48Z source: RADB last-modified: 2023-11-13T15:57:46Z rpki-ov-state: valid route: 45.90.31.0/24 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:23:40Z last-modified: 2021-10-07T13:11:48Z 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: valid route: 146.19.14.0/24 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2021-11-10T14:52:14Z last-modified: 2021-11-10T14:52:27Z 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: valid route6: 2a07:a8c0::/29 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-06-25T20:38:22Z last-modified: 2021-07-16T16:58:09Z 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: 2a07:a8c0::/29 origin: AS34939 descr: nextdns.Inc mnt-by: MAINT-AS33480 changed: nikhil [at] webwerks.com 20190709 #10:50:28Z source: RADB last-modified: 2023-11-13T16:18:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a07:a8c0::/32 origin: AS34939 descr: nextdns, Inc. mnt-by: MAINT-MELBICOM changed: ncc [at] melbicom.net 20220628 source: RADB last-modified: 2023-11-13T16:11:41Z rpki-ov-state: valid route6: 2a07:a8c0::/32 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:24:05Z last-modified: 2021-07-16T17:02:28Z 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: valid route6: 2a07:a8c0::/33 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:24:23Z last-modified: 2021-10-07T13:14:00Z source: RIPE descr: NextDNS Primary Anycast 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: 2a07:a8c0::/33 descr: Vultr Customer Route origin: AS34939 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20190629 #11:33:44Z source: RADB last-modified: 2023-11-13T15:56:41Z rpki-ov-state: valid route6: 2a07:a8c1::/32 origin: AS34939 descr: nextdns, Inc. mnt-by: MAINT-MELBICOM changed: ncc [at] melbicom.net 20220628 source: RADB last-modified: 2023-11-13T16:11:41Z rpki-ov-state: valid route6: 2a07:a8c1::/32 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:24:37Z last-modified: 2021-07-16T17:02:07Z 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: valid route6: 2a07:a8c1::/33 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-09-13T18:49:33Z last-modified: 2021-10-07T13:13:41Z source: RIPE descr: NextDNS Secondary Anycast 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: 2a07:a8c2::/32 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-07-05T18:24:54Z last-modified: 2021-07-16T17:01:56Z 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: 2a07:a8c2::/33 origin: AS34939 mnt-by: NEXTDNS-MNT created: 2019-09-13T18:50:17Z last-modified: 2021-07-16T17:01:34Z 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