These entries are queried from radb.net using whois, you can try my project getting these.
:AS30664 route: 198.175.50.0/24 origin: AS30664 descr: Sterling, VA admin-c: IVM1-ARIN tech-c: IVM1-ARIN mnt-by: MNT-EVMSL created: 2022-03-16T16:07:06Z last-modified: 2022-03-16T16:07:06Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.50.0/24 descr: Customer routes owned by PHH-MNT origin: AS30664 mnt-by: PHH-MNT changed: nocadmin [at] phh.com 20031211 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.51.0/24 origin: AS30664 descr: Sparks, MD admin-c: IVM1-ARIN tech-c: IVM1-ARIN mnt-by: MNT-EVMSL created: 2022-03-16T16:11:03Z last-modified: 2022-03-16T16:11:03Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.52.0/24 descr: PHH Vehicle critical route origin: AS30664 notify: nocadmin [at] phh.com mnt-by: PHH-MNT changed: nocadmin [at] phh.com 20031211 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.52.0/24 origin: AS30664 descr: Sterling, VA admin-c: IVM1-ARIN tech-c: IVM1-ARIN mnt-by: MNT-EVMSL created: 2022-03-16T16:16:55Z last-modified: 2022-03-16T16:16:55Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.53.0/24 origin: AS30664 descr: Sterling, VA admin-c: IVM1-ARIN tech-c: IVM1-ARIN mnt-by: MNT-EVMSL created: 2022-03-16T16:20:16Z last-modified: 2022-03-16T16:20:16Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.54.0/24 origin: AS30664 descr: Sterling, VA admin-c: IVM1-ARIN tech-c: IVM1-ARIN mnt-by: MNT-EVMSL created: 2022-03-16T16:20:51Z last-modified: 2022-03-16T16:20:51Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source