These entries are queried from radb.net using whois, you can try my project getting these.
:AS19031 route: 63.150.21.0/24 descr: Cu Answers origin: AS19031 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20101205 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.150.21.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19031 remarks: Proxy for EDI customer CU Answers mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20130102 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: 63.233.79.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19031 remarks: Proxy for EDI customer CU Answers mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20130102 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: 63.233.79.0/24 descr: Cu Answers origin: AS19031 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20101205 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.236.240.0/22 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19031 remarks: Proxy for EDI customer CU Answers mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20130102 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: 63.236.240.0/22 descr: Cu Answers origin: AS19031 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20101215 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.239.100.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19031 remarks: Proxy for EDI customer CU Answers mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20130102 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: 63.239.100.0/24 descr: Cu Answers origin: AS19031 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20101205 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.111.149.0/24 descr: Cu Answers origin: AS19031 mnt-by: CTI-MNT changed: ccs_ip-admin [at] cable.comcast.com 20101205 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.111.149.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19031 remarks: Proxy for EDI customer CU Answers mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20130102 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: 216.206.109.0/24 descr: ADDED FOR - AS19031 origin: AS19031 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net source: LEVEL3 last-modified: 2024-01-15T17:25:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source