Am 07.01.2013 20:05, schrieb Bruno Wolff III: > On Mon, Jan 07, 2013 at 13:44:09 -0500, > "Bob Goodwin - Zuni, Virginia, USA" <bobgoodwin@xxxxxxxxxxxx> wrote: >> >> I know that I can enter 108.160.160.0/24 to block a range of >> addresses but if I need to cover a much larger range can I do >> 108.160.160.0-108.160.175.255 ? Or could I do 108.160.160/24 or >> some similar notation? > > I think that would be 108.160.160.0/20 yes http://jodies.de/ipcalc Address: 108.160.160.0 01101100.10100000.1010 0000.00000000 Netmask: 255.255.240.0 = 20 11111111.11111111.1111 0000.00000000 Wildcard: 0.0.15.255 00000000.00000000.0000 1111.11111111 => Network: 108.160.160.0/20 01101100.10100000.1010 0000.00000000 (Class A) Broadcast: 108.160.175.255 01101100.10100000.1010 1111.11111111 HostMin: 108.160.160.1 01101100.10100000.1010 0000.00000001 HostMax: 108.160.175.254 01101100.10100000.1010 1111.11111110 Hosts/Net: 4094
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