These entries are queried from radb.net using whois, you can try my project getting these.
:AS18519 route: 38.137.224.0/21 origin: AS18519 descr: Route Registered for Cogent Communications Customer MTC TECHNOLOGIES geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20230525 #14:14:34Z source: RADB last-modified: 2023-11-13T16:17:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 172.81.16.0/22 origin: AS18519 descr: NetRange: 172.81.16.0 - 172.81.19.255 CIDR: 172.81.16.0/22 NetName: MEDIAPOLIS-4-01 NetHandle: NET-172-81-16-0-1 Parent: NET172 (NET-172-0-0-0-0) NetType: Direct Allocation mnt-by: MAINT-AS5056 changed: packetnetworking [at] aureon.com 20210603 #17:40:33Z source: RADB last-modified: 2023-11-13T16:05:48Z rpki-ov-state: valid route: 172.81.16.0/22 origin: AS18519 descr: Mediapolis Telephone Company 652 Main Street PO Box 398 Mediapolis IA 52637 United States admin-c: NOC33100-ARIN tech-c: NOC33100-ARIN mnt-by: MNT-MT-1369 created: 2021-05-20T19:59:04Z last-modified: 2021-05-20T19:59:04Z source: ARIN rpki-ov-state: valid route6: 2605:fac0::/32 origin: AS18519 descr: OrgName: MTC Technologies OrgId: MT-1369 Address: 652 Main Street Address: PO Box 398 City: Mediapolis StateProv: IA PostalCode: 52637 mnt-by: MAINT-AS5056 changed: packetnetworking [at] aureon.com 20210603 #17:41:49Z source: RADB last-modified: 2023-11-13T16:05:48Z rpki-ov-state: valid route6: 2605:fac0::/32 origin: AS18519 descr: Mediapolis Telephone Company 652 Main Street PO Box 398 Mediapolis IA 52637 United States admin-c: NOC33100-ARIN tech-c: NOC33100-ARIN mnt-by: MNT-MT-1369 created: 2021-05-20T20:03:19Z last-modified: 2021-05-20T20:03:19Z source: ARIN rpki-ov-state: valid