-
CIDR: /30
- is a 255.255.255.252 mask with a block size of 4
- 4 hosts (2 usable)
- 6 bits on, 2 bits off
- 64 sub-networks
-
CIDR: /29
- is a 255.255.255.248 mask with a block size of 8
- 8 hosts (6 usable)
- 5 bits on, 3 bits off
- 32 sub-networks
-
CIDR: /28
- is a 255.255.255.240 mask with a block size of 16
- 16 hosts (14 usable)
- 4 bits on, 4 bits off
- 16 sub-networks
-
CIDR: /27
- is a 255.255.255.224 mask with a block size of 32
- 32 hosts (30 usable)
- 3 bits on, 5 bits off
- 8 sub-networks
-
CIDR: /26
- is a 255.255.255.192 mask with a block size of 64
- 64 hosts (62 usable)
- 2 bits on, 6 bits off
- 4 sub-networks
-
CIDR: /25
- is a 255.255.255.128 mask with a block size of 128
- 128 hosts (126 usable)
- 1 bit on, 7 bits off
- 2 sub-networks
-
CIDR: /24
- is a 255.255.255.0 mask with a block size of 1
- 256 hosts (254 usable)
- 8 bits on, 0 bits off
- 256 sub-networks
-
CIDR: /23
- is a 255.255.254.0 mask with a block size of 2
- 512 hosts (510 usable)
- 7 bits on, 9 bits off
- 128 sub-networks
-
CIDR: /22
- is a 255.255.252.0 mask with a block size of 4
- 1024 hosts (1022 usable)
- 6 bits on, 2 bits off
- 64 sub-networks
-
CIDR: /21
- is a 255.255.248.0 mask with a block size of 8
- 2048 hosts (2046 usable)
- 5 bits on, 3 bits off
- 32 sub-networks
-
CIDR: /20
- is a 255.255.240.0 mask with a block size of 16
- 4096 hosts (4094 usable)
- 4 bits on, 4 bits off
- 16 sub-networks
-
CIDR: /19
- is a 255.255.224.0 mask with a block size of 32
- 8192 hosts (8190 usable)
- 3 bits on, 5 bits off
- 8 sub-networks
-
CIDR: /18
- is a 255.255.192.0 mask with a block size of 64
- 16384 hosts (16382 usable)
- 2 bits on, 6 bits off
- 4 sub-networks
-
CIDR: /17
- is a 255.255.128.0 mask with a block size of 128
- 32768 hosts (32766 usable)
- 1 bit on, 7 bits off
- 2 sub-networks
-
CIDR: /16
- is a 255.255.0.0 mask with a block size of 1
- 65536 hosts (65534 usable)
- 8 bits on, 0 bits off
- 256 sub-networks
-
CIDR: /15
- is a 255.254.0.0 mask with a block size of 2
- 131072 hosts (131070 usable)
- 7 bits on, 1 bit off
- 128 sub-networks
-
CIDR: /14
- is a 255.252.0.0 mask with a block size of 4
- 262144 hosts (262142 usable)
- 6 bits on, 2 bits off
- 64 sub-networks
-
CIDR: /13
- is a 255.248.0.0 mask with a block size of 8
- 524288 hosts (524286 usable)
- 5 bits on, 3 bits off
- 32 sub-networks
-
CIDR: /12
- is a 255.240.0.0 mask with a block size of 16
- 1048576 hosts (1048574 usable)
- 4 bits on, 4 bits off
- 16 sub-networks
-
CIDR: /11
- is a 255.224.0.0 mask with a block size of 32
- 2097152 hosts (2097150 usable)
- 3 bits on, 5 bits off
- 8 subnetworks
-
CIDR: /10
- is a 255.192.0.0 mask with a block size of 64
- 4194304 hosts (4194302 usable)
- 2 bits on, 6 bits off
- 4 sub-networks
-
CIDR: /9
- is a 255.128.0.0 mask with a block size of 128
- 8,388,608 hosts (8,388,606 usable)
- 1 bit on, 7 bits off
- 2 sub-networks
-
CIDR: /8
- is a 255.0.0.0 mask with a block size of 1
- 16,777,216 hosts (16,777,214 usable)
- 8 bits on, 0 bits off
- 2 sub-networks
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