These entries are queried from radb.net using whois, you can try my project getting these.
:AS55274 route: 64.141.192.0/18 descr: Switch Communications Customer Route origin: AS55274 remarks: Route for Caesars Entertainment, Inc. remarks: 64.141.192.0/18-24 mnt-by: SWITCHCOM-MNT changed: netops-eng [at] switchlv.com 20130808 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.141.192.0/18 origin: AS55274 descr: Switch Communications Customer Route member-of: RS-AS22911 member-of: RS-AS23005 remarks: Route for Caesars Entertainment, Inc. remarks: 64.141.192.0/18-24 mnt-by: MAINT-SWITCH changed: netops [at] switch.com 20200721 #19:31:56Z source: RADB last-modified: 2023-11-13T16:01:13Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.141.208.0/24 descr: Switch Communications Customer Route origin: AS55274 member-of: RS-AS22911 remarks: Route for Caesars Entertainment, Inc. mnt-by: MAINT-SWITCH changed: netops [at] switch.com 20180724 #02:56:07Z source: RADB last-modified: 2023-11-13T15:54:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.141.224.0/21 origin: AS55274 descr: QTS Proxy for Caesars Enterprise Services, LLC mnt-by: MAINT-QTS changed: marc.garrison [at] qtsdatacenters.com 20220624 #13:12:50Z source: RADB last-modified: 2023-11-13T16:11:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source