Ever encountered stupid things like documentation prefixes (192.0.2.0/24 I'm looking at you) being used because people think "nobody will be using this space!", except the other idiot with the same idea inevitably is?
Screw that! There's a whole /8, a /12 and a /16 set aside for this, so use it.
Note: 10/8 is so vast that most of the results will come from that. If you persist for long enough, you'll see the other subnets pop up.
Buy awesome hosting, virtual machines and domains from me