These entries are queried from radb.net using whois, you can try my project getting these.
:AS53281 route: 8.18.51.0/24 descr: Clearpath Solutions Group descr: 13800 Coppermine Rd Suite 400 descr: Herndon,VA 20171 descr: US origin: AS53281 mnt-by: MNT-CLEAR-110 changed: garry.ward [at] clearpathsg.com 20130920 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.21.234.0/24 descr: Clearpath Solutions Group descr: 13800 Coppermine Rd Suite 400 descr: Herndon,VA 20171 descr: US origin: AS53281 mnt-by: MNT-CLEAR-110 changed: garry.ward [at] clearpathsg.com 20131211 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.21.234.0/24 descr: WBS Connect route origin: AS53281 mnt-by: LEVEL3-MNT changed: frank.delungjr [at] level3.com 20090812 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.122.149.0/24 origin: AS53281 descr: PO Box 4000 Collegeville PA 19426 United States remarks: CDI admin-c: MEH11-ARIN tech-c: MEH11-ARIN mnt-by: MNT-AC-983 created: 2024-02-06T15:31:04Z last-modified: 2024-02-06T15:31:04Z source: ARIN rpki-ov-state: valid route: 192.133.26.0/24 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS53281 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.175.56.0/22 origin: AS53281 descr: 12100 Sunset Hills Road, Suite:610 Reston VA 20190 United States member-of: RS-AS53281 admin-c: NETWO3175-ARIN tech-c: NETWO3175-ARIN mnt-by: MNT-COL-116 created: 2021-05-04T20:00:23Z last-modified: 2023-10-16T20:36:05Z source: ARIN rpki-ov-state: valid route: 199.201.96.0/21 origin: AS53281 descr: 12100 Sunset Hills Road, Suite:610 Reston VA 20190 United States member-of: RS-AS53281 admin-c: NETWO3175-ARIN tech-c: NETWO3175-ARIN mnt-by: MNT-COL-116 created: 2021-05-04T19:58:14Z last-modified: 2023-10-16T20:36:20Z source: ARIN rpki-ov-state: valid route: 209.209.3.0/24 origin: AS53281 descr: PO Box 4000 Collegeville PA 19426 United States remarks: CDI admin-c: MEH11-ARIN tech-c: MEH11-ARIN mnt-by: MNT-AC-983 created: 2024-02-06T15:32:32Z last-modified: 2024-02-06T15:32:32Z source: ARIN rpki-ov-state: valid