These entries are queried from radb.net using whois, you can try my project getting these.
:AS19721 route: 204.193.64.0/19 descr: CHTR-Magellan Health Inc-Central origin: AS19721 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-CHTR-WD changed: publicipaddressing [at] charter.com 20210426 #20:21:25Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.64.0/20 descr: CHTR-Magellan Health Inc-Central origin: AS19721 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-CHTR-WD changed: publicipaddressing [at] charter.com 20210426 #20:21:25Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.69.0/24 descr: Magellan Health Services origin: AS19721 mnt-by: MAINT-AS27506 changed: robert.hinst [at] crowncastle.com 20190214 #19:39:41Z source: RADB last-modified: 2023-11-13T15:55:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.80.0/20 descr: CHTR-Magellan Health Inc-Central origin: AS19721 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-CHTR-WD changed: publicipaddressing [at] charter.com 20210426 #20:21:25Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.84.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19721 remarks: Proxy add for EDIA customer MAGELLAN HEALTH Inc mnt-by: MAINT-AS7922 changed: marcin_kostecki [at] comcast.com 20211007 source: RADB last-modified: 2023-11-13T16:08:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.85.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19721 remarks: Proxy add for EDIA customer MAGELLAN HEALTH Inc mnt-by: MAINT-AS7922 changed: marcin_kostecki [at] comcast.com 20211007 source: RADB last-modified: 2023-11-13T16:08:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.193.86.0/23 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS19721 remarks: Proxy add for EDIA customer MAGELLAN HEALTH Inc mnt-by: MAINT-AS7922 changed: marcin_kostecki [at] comcast.com 20211007 source: RADB last-modified: 2023-11-13T16:08:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source