So let's say you need to list out 10.10.10.1 - 10.10.10.240...
C:>for /l %i in (1 1 240) do echo 10.10.10.%i > outfile.txt
This produces a text file with an IP per line. Copy and past that into an excel column and you're done. If you need something more fun like say 10.10.10.0/30 - 10.10.10.252/30 you can change the first number in the parentheses to 0, the second number to 2 and the third to 252. The syntax is that the first is the start for %i, the second is the amount to increment and the third is the stopping point.