[e2e] Addressing format...network and mask

[Alok Dube]

Hi,

are there any protocols which look at network addressing in the following
manner

I need a way to propogate the 1st address and last address of a network.

Incase i have 129 hosts in a network, i simply should propogate the 1st
address and the last address (or the number of hosts) instead of the mask.

is this done anywhere?

-thanks
Alok