These entries are queried from radb.net using whois, you can try my project getting these.
:AS21863 route: 172.99.248.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS21863 remarks: Proxy add for EDIA customer INTELIVANT-CONSULTING mnt-by: MAINT-AS7922 changed: marcin_kostecki [at] comcast.com 20210521 source: RADB last-modified: 2023-11-13T16:05:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source