These entries are queried from radb.net using whois, you can try my project getting these.
:AS6363 route: 12.38.14.0/24 descr: RR-RC-Extreme Networks origin: AS6363 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 12.38.15.0/24 descr: RR-RC-Extreme Networks origin: AS6363 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.141.0.0/16 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS6363 remarks: Proxy object for EDI customer Enterasys Networks Inc mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamhere.cable.comcast.com 20121123 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: 134.141.8.0/23 descr: RR-RC-Extreme Networks origin: AS6363 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.141.10.0/23 descr: RR-RC-Extreme Networks origin: AS6363 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:9fc0:f000::/40 descr: Extreme Networks origin: AS6363 mnt-by: MAINT-AS27506 changed: philippe.robillard [at] crowncastle.com 20240304 source: RADB last-modified: 2024-03-04T21:18:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source