These entries are queried from radb.net using whois, you can try my project getting these.
:AS54481 route: 192.30.244.0/23 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS54481 remarks: Proxy add for EDIA customer The County of Chester mnt-by: MAINT-AS7922 changed: scott_mccormick2 [at] cable.comcast.com 20150429 source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.30.244.0/24 descr: Zito Networks origin: AS54481 mnt-by: MAINT-AS26801 changed: skyler.blumer [at] zitomedia.com 20220925 source: RADB last-modified: 2023-11-13T16:12:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.30.245.0/24 descr: Zito Networks origin: AS54481 mnt-by: MAINT-AS26801 changed: skyler.blumer [at] zitomedia.com 20220925 source: RADB last-modified: 2023-11-13T16:12:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.108.252.0/24 origin: AS54481 mnt-by: MNT-CHS1 descr: Chesconet IPv4 block re-assigned to County of Chester (Pennsylvania) tech-c: LKO36-ARIN tech-c: TCU10-ARIN admin-c: TCU10-ARIN source: ARIN created: 2020-07-16T17:51:09Z last-modified: 2020-07-16T17:51:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.108.252.0/24 descr: Switch Communications Customer Route origin: AS54481 remarks: Route for Evolve IP remarks: 204.108.252.0/24 mnt-by: SWITCHCOM-MNT changed: netops [at] switchlv.com 20120328 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.108.252.0/24 descr: Zito Networks origin: AS54481 mnt-by: MAINT-AS26801 changed: skyler.blumer [at] zitomedia.com 20220925 source: RADB last-modified: 2023-11-13T16:12:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source