What is the minimum reverse network that can be delegated?




I am an old timer, and the smallest networks I have managed were Class
C. The traditional named configuration notation allowed me to place a
0 in the proper place, to have a reverse DNS delegated.

Now I find myself in a network with a 255.255.255.240 mask. Can a
network block that small be delegated?

TIA,

-Ramon

ps: Feel free to correct my terminology.

.