These entries are queried from radb.net using whois, you can try my project getting these.
:AS62644 route: 198.55.26.0/23 descr: NBC Sports Group origin: AS62644 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20160902 #18:57:08Z source: RADB last-modified: 2023-11-13T15:49:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.55.26.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS62644 remarks: Proxy add for EDIA customer NBC Sports Network mnt-by: MAINT-AS7922 changed: ryan_mcclean [at] comcast.com 20190809 source: RADB last-modified: 2023-11-13T15:57:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.55.27.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS62644 remarks: Proxy add for EDIA customer NBC Sports Network mnt-by: MAINT-AS7922 changed: ryan_mcclean [at] comcast.com 20190809 source: RADB last-modified: 2023-11-13T15:57:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source