It is unclear which organization RBLHST-FL is actually referring to, as the ASN is now owned and operated by J2 Global who owns NetProtect (formerly Unblock-us.com), who operates StrongVPN and IPVanish.
The most likely conclusion I can come to is that RBLHST refers to Reliable Hosting which is another subsidiary operated by J2 Global.
Our advice: Stay away from any company that “serial entrepreneur” Lance Crosby as ever been involved with. They aren’t your friend. Hint: SoftLayer, StackPath, IPVanish, Highwinds, etc.
VPNs That Use RBLHST-FL