These entries are queried from radb.net using whois, you can try my project getting these.
:AS14787 route: 12.1.83.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS14787 remarks: Proxy add for EDIA customer Guardian Industries mnt-by: MAINT-AS7922 changed: robert_beauvais [at] cable.comcast.com 20111003 #15:04:46Z 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: 12.1.83.0/24 descr: Guardian Industries origin: AS14787 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20081027 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.12.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS14787 remarks: Proxy add for EDIA customer Guardian Industries mnt-by: MAINT-AS7922 changed: robert_beauvais [at] cable.comcast.com 20111004 #14:26:32Z 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: 199.96.13.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS14787 remarks: Proxy entry for customer Guardian Industries Corporation mnt-by: MAINT-AS7922 changed: wyatt_clarke [at] cable.comcast.com 20160630 #21:46:24Z source: RADB last-modified: 2023-11-13T15:54:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.14.0/24 descr: Guardinad Industries origin: AS14787 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20180305 source: RADB last-modified: 2023-11-13T15:53:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.196.63.0/24 descr: Comcast cable Communications, Inc. 1800 Bishops Gate Blvd Mt laurel, NJ 08054 origin: AS14787 remarks: Proxy object for customer Guardian Automotive Products, Inc mnt-by: MAINT-AS7922 changed: stuart_nickerson [at] cable.comcast.com 20130905 #22:10:37Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source