These entries are queried from radb.net using whois, you can try my project getting these.
:AS40608 route: 192.52.74.0/23 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-18T21:25:24Z last-modified: 2020-06-18T21:25:24Z descr: MNT-HCT-18 route 192.052.074.000/23 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.52.74.0/23 descr: Hershey-Net-2 origin: AS40608 mnt-by: MAINT-AS13807 changed: jclingan [at] gpcom.com 20181116 #16:14:44Z source: RADB last-modified: 2023-11-13T15:57:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.52.74.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:21:18Z last-modified: 2020-06-19T13:21:18Z descr: MNT-HCT-18 route 192.052.074.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.52.75.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:21:41Z last-modified: 2020-06-19T13:21:41Z descr: MNT-HCT-18 route 192.052.075.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.64.0/22 descr: Hershey-Net-1 origin: AS40608 mnt-by: MAINT-AS13807 changed: jclingan [at] gpcom.com 20181116 #16:15:35Z source: RADB last-modified: 2023-11-13T15:57:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.64.0/22 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-18T21:25:54Z last-modified: 2020-06-18T21:25:54Z descr: MNT-HCT-18 route 199.027.064.000/22 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.64.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:22:22Z last-modified: 2020-06-19T13:22:22Z descr: MNT-HCT-18 route 199.027.064.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.65.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:22:37Z last-modified: 2020-06-19T13:22:37Z descr: MNT-HCT-18 route 199.027.065.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.66.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:23:08Z last-modified: 2020-06-19T13:23:08Z descr: MNT-HCT-18 route 199.027.066.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.27.67.0/24 origin: AS40608 mnt-by: MNT-HCT-18 tech-c: BH610-ARIN tech-c: RWO2-ARIN admin-c: RWO2-ARIN source: ARIN created: 2020-06-19T13:23:48Z last-modified: 2020-06-19T13:23:48Z descr: MNT-HCT-18 route 199.027.067.000/24 AS40608 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source