We ban external networks fom access to our net and I'm trying to set up
aspreadsheet to help me identify single addresses when I get queries about
if someone is blocked. I've set up a spreqadsheet of the banned networks and
I want to autofill the stat and end address of the sub/super nets. So that
it loooks somewhat like this

Name ,Address , Mask , Start
,End
bantimewarner,207.250.0.0,255.255.0.0,207.250.0.1, 207.250.255.254

bannigeria216,216.133.174.0,255.255.255.0,216.133. 174.1,216.133.174.254





What I need is the formula to get the start and end addresses from the IP
and mask and what format do I set the cells to?