These entries are queried from radb.net using whois, you can try my project getting these.
:AS27543 route: 216.38.112.0/20 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS27543 remarks: Proxy for EDI customer Elliot mnt-by: MAINT-AS7922 changed: courtney_smith [at] cable.comcast.com 20160825 #21:40:07Z source: RADB last-modified: 2023-11-13T15:54:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.38.113.0/24 origin: AS27543 descr: Customer Proxy - Elliot Management mnt-by: MAINT-AS22925 changed: ssumrall [at] alliedtelecom.net 20200129 #17:01:32Z source: RADB last-modified: 2023-11-13T15:59:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.38.114.0/24 origin: AS27543 descr: Iron Mountain Data Centers, LLC One Federal Street Boston, MA 02111 United States admin-c: IMDC-Network Operations tech-c: IMDC-Network Operations notify: imdcnetops [at] ironmountain.com mnt-by: MAINT-AS12025 remarks: Proxy registered by IMDC for customer changed: andrew.shappell [at] ironmountain.com 20211029 source: RADB last-modified: 2023-11-13T16:08:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.38.116.0/24 descr: Elliott Management origin: AS27543 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20150108 source: RADB last-modified: 2023-11-13T15:47:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source