Netmasks
Netmask |
Netmask (binary) |
CIDR |
Notes |
255.255.255.255 255.255.255.254 255.255.255.252 255.255.255.248 255.255.255.240 255.255.255.224 255.255.255.192 255.255.255.128 255.255.255.0 255.255.254.0 255.255.252.0 255.255.248.0 255.255.240.0 255.255.224.0 255.255.192.0 255.255.128.0 255.255.0.0 255.254.0.0 255.252.0.0 255.248.0.0 255.240.0.0 255.224.0.0 255.192.0.0 255.128.0.0 255.0.0.0 254.0.0.0 252.0.0.0 248.0.0.0 240.0.0.0 224.0.0.0 192.0.0.0 128.0.0.0 0.0.0.0 |
11111111.11111111.11111111.11111111 11111111.11111111.11111111.11111110 11111111.11111111.11111111.11111100 11111111.11111111.11111111.11111000 11111111.11111111.11111111.11110000 11111111.11111111.11111111.11100000 11111111.11111111.11111111.11000000 11111111.11111111.11111111.10000000 11111111.11111111.11111111.00000000 11111111.11111111.11111110.00000000 11111111.11111111.11111100.00000000 11111111.11111111.11111000.00000000 11111111.11111111.11110000.00000000 11111111.11111111.11100000.00000000 11111111.11111111.11000000.00000000 11111111.11111111.10000000.00000000 11111111.11111111.00000000.00000000 11111111.11111110.00000000.00000000 11111111.11111100.00000000.00000000 11111111.11111000.00000000.00000000 11111111.11110000.00000000.00000000 11111111.11100000.00000000.00000000 11111111.11000000.00000000.00000000 11111111.10000000.00000000.00000000 11111111.00000000.00000000.00000000 11111110.00000000.00000000.00000000 11111100.00000000.00000000.00000000 11111000.00000000.00000000.00000000 11110000.00000000.00000000.00000000 11100000.00000000.00000000.00000000 11000000.00000000.00000000.00000000 10000000.00000000.00000000.00000000 00000000.00000000.00000000.00000000 |
/32 /31 /30 /29 /28 /27 /26 /25 /24 /23 /22 /21 /20 /19 /18 /17 /16 /15 /14 /13 /12 /11 /10 /9 /8 /7 /6 /5 /4 /3 /2 /1 /0 |
Host (single addr) Unuseable 2 useable 6 useable 14 useable 30 useable 62 useable 126 useable "Class C" 254 useable 2 Class C's 4 Class C's 8 Class C's 16 Class C's 32 Class C's 64 Class C's 128 Class C's "Class B" 2 Class B's 4 Class B's 8 Class B's 16 Class B's 32 Class B's 64 Class B's 128 Class B's "Class A"
IP space |
255.255.255.0 ffffff00 /24 1 254 0.0.0.255
255.255.255.128 ffffff80 /25 2 126 0.0.0.127
255.255.255.192 ffffffc0 /26 4 62 0.0.0.63
255.255.255.224 ffffffe0 /27 8 30 0.0.0.31
255.255.255.240 fffffff0 /28 16 14 0.0.0.15
255.255.255.248 fffffff8 /29 32 6 0.0.0.7
255.255.255.252 fffffffc /30 64 2 0.0.0.3