That ll be two blocks 85 206 193 0 24 85 206 194 0 23 There should be a calculator for these things somewhere on the web In this particular case take care a whois on 85 206 193 0 shows that the actual IP range is 85 206 192 0 85 206 207 255 or 85 206 192 0 21 which seems to be a Lithuanian Telecom range and something about it makes me suspect it s dynamic don t block unless you re around for a while afterwards to unblock in case of collateral damage