These entries are queried from radb.net using whois, you can try my project getting these.
:AS400315 route: 45.45.147.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS400315 remarks: Proxy add for EDIA customer Cold Heading Company mnt-by: MAINT-AS7922 changed: sung_kim [at] comcast.com 20220816 source: RADB last-modified: 2023-11-13T16:12:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.45.147.0/24 origin: AS400315 descr: 21777 HOOVER RD WARREN MI 48089 United States remarks: Peerless Network advertising per LOA agreement with this Customer. Proxy Registered on behalf of AS400315 admin-c: ADMIN8416-ARIN tech-c: ADMIN8416-ARIN tech-c: IRR-ARIN tech-c: KFD-ARIN mnt-by: MNT-CH-1192 created: 2023-06-14T14:11:14Z last-modified: 2023-06-14T14:14:53Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source