search for: netcat6

In my testing of HIP, there is reference to use 'nc6' for a simple TCP character echo server. No such animal in Centos, and after a bit of digging I find this refers to Netcat6 which seems to be a dead app? Is it available as an rpm somewhere for Centos? My searching is coming up empty. Or just about any service that I can start on one system and connect from another that would perform this simple echo test.