These entries are queried from radb.net using whois, you can try my project getting these.
:AS396247 route: 12.155.53.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS396247 remarks: Proxy add for EDIA customer ADLAI E STEVENSON HIGH SCHOOL mnt-by: MAINT-AS7922 changed: michael_erickson2 [at] cable.comcast.com 20221013 source: RADB last-modified: 2023-11-13T16:12:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 50.205.129.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS396247 remarks: Proxy add for EDIA customer ADLAI E STEVENSON HIGH SCHOOL mnt-by: MAINT-AS7922 changed: michael_erickson2 [at] cable.comcast.com 20221013 source: RADB last-modified: 2023-11-13T16:12:43Z rpki-ov-state: valid route: 96.61.42.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS396247 remarks: Proxy add for EDIA customer ADLAI E STEVENSON DIST 125 mnt-by: MAINT-AS7922 changed: chris_johnson8 [at] cable.comcast.com 20171207 source: RADB last-modified: 2023-11-13T15:54:23Z rpki-ov-state: valid route: 96.61.42.0/24 descr: Proxy Object for Adlai E. Stevenson High School origin: AS396247 mnt-by: MNT-TDST changed: ispadmin [at] tdstelecom.com 20170419 source: ARIN rpki-ov-state: valid