[CentOS] netcat or netcat6 for Centos 6.3

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.