IPv4 Subnet Calculator
Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.
private IP (RFC 1918)10.78.72.0/21
network10.78.72.0/21
broadcast10.78.79.255
first host10.78.72.1
last host10.78.79.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.78.72.0/21
address00001010.01001110.01001000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.01001110.01001000.00000000
broadcast00001010.01001110.01001111.11111111
green = network part, grey = host part
hex0x0a4e4800
decimal172902400
reverse dns0.72.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4800
/21 split into /29 · 256 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.78.72.0/29 | 10.78.72.1 – 10.78.72.6 | 10.78.72.7 |
| 2 | 10.78.72.8/29 | 10.78.72.9 – 10.78.72.14 | 10.78.72.15 |
| 3 | 10.78.72.16/29 | 10.78.72.17 – 10.78.72.22 | 10.78.72.23 |
| 4 | 10.78.72.24/29 | 10.78.72.25 – 10.78.72.30 | 10.78.72.31 |
| 5 | 10.78.72.32/29 | 10.78.72.33 – 10.78.72.38 | 10.78.72.39 |
| 6 | 10.78.72.40/29 | 10.78.72.41 – 10.78.72.46 | 10.78.72.47 |
| 7 | 10.78.72.48/29 | 10.78.72.49 – 10.78.72.54 | 10.78.72.55 |
| 8 | 10.78.72.56/29 | 10.78.72.57 – 10.78.72.62 | 10.78.72.63 |
| 9 | 10.78.72.64/29 | 10.78.72.65 – 10.78.72.70 | 10.78.72.71 |
| 10 | 10.78.72.72/29 | 10.78.72.73 – 10.78.72.78 | 10.78.72.79 |
| 11 | 10.78.72.80/29 | 10.78.72.81 – 10.78.72.86 | 10.78.72.87 |
| 12 | 10.78.72.88/29 | 10.78.72.89 – 10.78.72.94 | 10.78.72.95 |
| 13 | 10.78.72.96/29 | 10.78.72.97 – 10.78.72.102 | 10.78.72.103 |
| 14 | 10.78.72.104/29 | 10.78.72.105 – 10.78.72.110 | 10.78.72.111 |
| 15 | 10.78.72.112/29 | 10.78.72.113 – 10.78.72.118 | 10.78.72.119 |
| 16 | 10.78.72.120/29 | 10.78.72.121 – 10.78.72.126 | 10.78.72.127 |
| 17 | 10.78.72.128/29 | 10.78.72.129 – 10.78.72.134 | 10.78.72.135 |
| 18 | 10.78.72.136/29 | 10.78.72.137 – 10.78.72.142 | 10.78.72.143 |
| 19 | 10.78.72.144/29 | 10.78.72.145 – 10.78.72.150 | 10.78.72.151 |
| 20 | 10.78.72.152/29 | 10.78.72.153 – 10.78.72.158 | 10.78.72.159 |
| 21 | 10.78.72.160/29 | 10.78.72.161 – 10.78.72.166 | 10.78.72.167 |
| 22 | 10.78.72.168/29 | 10.78.72.169 – 10.78.72.174 | 10.78.72.175 |
| 23 | 10.78.72.176/29 | 10.78.72.177 – 10.78.72.182 | 10.78.72.183 |
| 24 | 10.78.72.184/29 | 10.78.72.185 – 10.78.72.190 | 10.78.72.191 |
| 25 | 10.78.72.192/29 | 10.78.72.193 – 10.78.72.198 | 10.78.72.199 |
| 26 | 10.78.72.200/29 | 10.78.72.201 – 10.78.72.206 | 10.78.72.207 |
| 27 | 10.78.72.208/29 | 10.78.72.209 – 10.78.72.214 | 10.78.72.215 |
| 28 | 10.78.72.216/29 | 10.78.72.217 – 10.78.72.222 | 10.78.72.223 |
| 29 | 10.78.72.224/29 | 10.78.72.225 – 10.78.72.230 | 10.78.72.231 |
| 30 | 10.78.72.232/29 | 10.78.72.233 – 10.78.72.238 | 10.78.72.239 |
| 31 | 10.78.72.240/29 | 10.78.72.241 – 10.78.72.246 | 10.78.72.247 |
| 32 | 10.78.72.248/29 | 10.78.72.249 – 10.78.72.254 | 10.78.72.255 |
| 33 | 10.78.73.0/29 | 10.78.73.1 – 10.78.73.6 | 10.78.73.7 |
| 34 | 10.78.73.8/29 | 10.78.73.9 – 10.78.73.14 | 10.78.73.15 |
| 35 | 10.78.73.16/29 | 10.78.73.17 – 10.78.73.22 | 10.78.73.23 |
| 36 | 10.78.73.24/29 | 10.78.73.25 – 10.78.73.30 | 10.78.73.31 |
| 37 | 10.78.73.32/29 | 10.78.73.33 – 10.78.73.38 | 10.78.73.39 |
| 38 | 10.78.73.40/29 | 10.78.73.41 – 10.78.73.46 | 10.78.73.47 |
| 39 | 10.78.73.48/29 | 10.78.73.49 – 10.78.73.54 | 10.78.73.55 |
| 40 | 10.78.73.56/29 | 10.78.73.57 – 10.78.73.62 | 10.78.73.63 |
| 41 | 10.78.73.64/29 | 10.78.73.65 – 10.78.73.70 | 10.78.73.71 |
| 42 | 10.78.73.72/29 | 10.78.73.73 – 10.78.73.78 | 10.78.73.79 |
| 43 | 10.78.73.80/29 | 10.78.73.81 – 10.78.73.86 | 10.78.73.87 |
| 44 | 10.78.73.88/29 | 10.78.73.89 – 10.78.73.94 | 10.78.73.95 |
| 45 | 10.78.73.96/29 | 10.78.73.97 – 10.78.73.102 | 10.78.73.103 |
| 46 | 10.78.73.104/29 | 10.78.73.105 – 10.78.73.110 | 10.78.73.111 |
| 47 | 10.78.73.112/29 | 10.78.73.113 – 10.78.73.118 | 10.78.73.119 |
| 48 | 10.78.73.120/29 | 10.78.73.121 – 10.78.73.126 | 10.78.73.127 |
| 49 | 10.78.73.128/29 | 10.78.73.129 – 10.78.73.134 | 10.78.73.135 |
| 50 | 10.78.73.136/29 | 10.78.73.137 – 10.78.73.142 | 10.78.73.143 |
| 51 | 10.78.73.144/29 | 10.78.73.145 – 10.78.73.150 | 10.78.73.151 |
| 52 | 10.78.73.152/29 | 10.78.73.153 – 10.78.73.158 | 10.78.73.159 |
| 53 | 10.78.73.160/29 | 10.78.73.161 – 10.78.73.166 | 10.78.73.167 |
| 54 | 10.78.73.168/29 | 10.78.73.169 – 10.78.73.174 | 10.78.73.175 |
| 55 | 10.78.73.176/29 | 10.78.73.177 – 10.78.73.182 | 10.78.73.183 |
| 56 | 10.78.73.184/29 | 10.78.73.185 – 10.78.73.190 | 10.78.73.191 |
| 57 | 10.78.73.192/29 | 10.78.73.193 – 10.78.73.198 | 10.78.73.199 |
| 58 | 10.78.73.200/29 | 10.78.73.201 – 10.78.73.206 | 10.78.73.207 |
| 59 | 10.78.73.208/29 | 10.78.73.209 – 10.78.73.214 | 10.78.73.215 |
| 60 | 10.78.73.216/29 | 10.78.73.217 – 10.78.73.222 | 10.78.73.223 |
| 61 | 10.78.73.224/29 | 10.78.73.225 – 10.78.73.230 | 10.78.73.231 |
| 62 | 10.78.73.232/29 | 10.78.73.233 – 10.78.73.238 | 10.78.73.239 |
| 63 | 10.78.73.240/29 | 10.78.73.241 – 10.78.73.246 | 10.78.73.247 |
| 64 | 10.78.73.248/29 | 10.78.73.249 – 10.78.73.254 | 10.78.73.255 |
| 65 | 10.78.74.0/29 | 10.78.74.1 – 10.78.74.6 | 10.78.74.7 |
| 66 | 10.78.74.8/29 | 10.78.74.9 – 10.78.74.14 | 10.78.74.15 |
| 67 | 10.78.74.16/29 | 10.78.74.17 – 10.78.74.22 | 10.78.74.23 |
| 68 | 10.78.74.24/29 | 10.78.74.25 – 10.78.74.30 | 10.78.74.31 |
| 69 | 10.78.74.32/29 | 10.78.74.33 – 10.78.74.38 | 10.78.74.39 |
| 70 | 10.78.74.40/29 | 10.78.74.41 – 10.78.74.46 | 10.78.74.47 |
| 71 | 10.78.74.48/29 | 10.78.74.49 – 10.78.74.54 | 10.78.74.55 |
| 72 | 10.78.74.56/29 | 10.78.74.57 – 10.78.74.62 | 10.78.74.63 |
| 73 | 10.78.74.64/29 | 10.78.74.65 – 10.78.74.70 | 10.78.74.71 |
| 74 | 10.78.74.72/29 | 10.78.74.73 – 10.78.74.78 | 10.78.74.79 |
| 75 | 10.78.74.80/29 | 10.78.74.81 – 10.78.74.86 | 10.78.74.87 |
| 76 | 10.78.74.88/29 | 10.78.74.89 – 10.78.74.94 | 10.78.74.95 |
| 77 | 10.78.74.96/29 | 10.78.74.97 – 10.78.74.102 | 10.78.74.103 |
| 78 | 10.78.74.104/29 | 10.78.74.105 – 10.78.74.110 | 10.78.74.111 |
| 79 | 10.78.74.112/29 | 10.78.74.113 – 10.78.74.118 | 10.78.74.119 |
| 80 | 10.78.74.120/29 | 10.78.74.121 – 10.78.74.126 | 10.78.74.127 |
| 81 | 10.78.74.128/29 | 10.78.74.129 – 10.78.74.134 | 10.78.74.135 |
| 82 | 10.78.74.136/29 | 10.78.74.137 – 10.78.74.142 | 10.78.74.143 |
| 83 | 10.78.74.144/29 | 10.78.74.145 – 10.78.74.150 | 10.78.74.151 |
| 84 | 10.78.74.152/29 | 10.78.74.153 – 10.78.74.158 | 10.78.74.159 |
| 85 | 10.78.74.160/29 | 10.78.74.161 – 10.78.74.166 | 10.78.74.167 |
| 86 | 10.78.74.168/29 | 10.78.74.169 – 10.78.74.174 | 10.78.74.175 |
| 87 | 10.78.74.176/29 | 10.78.74.177 – 10.78.74.182 | 10.78.74.183 |
| 88 | 10.78.74.184/29 | 10.78.74.185 – 10.78.74.190 | 10.78.74.191 |
| 89 | 10.78.74.192/29 | 10.78.74.193 – 10.78.74.198 | 10.78.74.199 |
| 90 | 10.78.74.200/29 | 10.78.74.201 – 10.78.74.206 | 10.78.74.207 |
| 91 | 10.78.74.208/29 | 10.78.74.209 – 10.78.74.214 | 10.78.74.215 |
| 92 | 10.78.74.216/29 | 10.78.74.217 – 10.78.74.222 | 10.78.74.223 |
| 93 | 10.78.74.224/29 | 10.78.74.225 – 10.78.74.230 | 10.78.74.231 |
| 94 | 10.78.74.232/29 | 10.78.74.233 – 10.78.74.238 | 10.78.74.239 |
| 95 | 10.78.74.240/29 | 10.78.74.241 – 10.78.74.246 | 10.78.74.247 |
| 96 | 10.78.74.248/29 | 10.78.74.249 – 10.78.74.254 | 10.78.74.255 |
| 97 | 10.78.75.0/29 | 10.78.75.1 – 10.78.75.6 | 10.78.75.7 |
| 98 | 10.78.75.8/29 | 10.78.75.9 – 10.78.75.14 | 10.78.75.15 |
| 99 | 10.78.75.16/29 | 10.78.75.17 – 10.78.75.22 | 10.78.75.23 |
| 100 | 10.78.75.24/29 | 10.78.75.25 – 10.78.75.30 | 10.78.75.31 |
| 101 | 10.78.75.32/29 | 10.78.75.33 – 10.78.75.38 | 10.78.75.39 |
| 102 | 10.78.75.40/29 | 10.78.75.41 – 10.78.75.46 | 10.78.75.47 |
| 103 | 10.78.75.48/29 | 10.78.75.49 – 10.78.75.54 | 10.78.75.55 |
| 104 | 10.78.75.56/29 | 10.78.75.57 – 10.78.75.62 | 10.78.75.63 |
| 105 | 10.78.75.64/29 | 10.78.75.65 – 10.78.75.70 | 10.78.75.71 |
| 106 | 10.78.75.72/29 | 10.78.75.73 – 10.78.75.78 | 10.78.75.79 |
| 107 | 10.78.75.80/29 | 10.78.75.81 – 10.78.75.86 | 10.78.75.87 |
| 108 | 10.78.75.88/29 | 10.78.75.89 – 10.78.75.94 | 10.78.75.95 |
| 109 | 10.78.75.96/29 | 10.78.75.97 – 10.78.75.102 | 10.78.75.103 |
| 110 | 10.78.75.104/29 | 10.78.75.105 – 10.78.75.110 | 10.78.75.111 |
| 111 | 10.78.75.112/29 | 10.78.75.113 – 10.78.75.118 | 10.78.75.119 |
| 112 | 10.78.75.120/29 | 10.78.75.121 – 10.78.75.126 | 10.78.75.127 |
| 113 | 10.78.75.128/29 | 10.78.75.129 – 10.78.75.134 | 10.78.75.135 |
| 114 | 10.78.75.136/29 | 10.78.75.137 – 10.78.75.142 | 10.78.75.143 |
| 115 | 10.78.75.144/29 | 10.78.75.145 – 10.78.75.150 | 10.78.75.151 |
| 116 | 10.78.75.152/29 | 10.78.75.153 – 10.78.75.158 | 10.78.75.159 |
| 117 | 10.78.75.160/29 | 10.78.75.161 – 10.78.75.166 | 10.78.75.167 |
| 118 | 10.78.75.168/29 | 10.78.75.169 – 10.78.75.174 | 10.78.75.175 |
| 119 | 10.78.75.176/29 | 10.78.75.177 – 10.78.75.182 | 10.78.75.183 |
| 120 | 10.78.75.184/29 | 10.78.75.185 – 10.78.75.190 | 10.78.75.191 |
| 121 | 10.78.75.192/29 | 10.78.75.193 – 10.78.75.198 | 10.78.75.199 |
| 122 | 10.78.75.200/29 | 10.78.75.201 – 10.78.75.206 | 10.78.75.207 |
| 123 | 10.78.75.208/29 | 10.78.75.209 – 10.78.75.214 | 10.78.75.215 |
| 124 | 10.78.75.216/29 | 10.78.75.217 – 10.78.75.222 | 10.78.75.223 |
| 125 | 10.78.75.224/29 | 10.78.75.225 – 10.78.75.230 | 10.78.75.231 |
| 126 | 10.78.75.232/29 | 10.78.75.233 – 10.78.75.238 | 10.78.75.239 |
| 127 | 10.78.75.240/29 | 10.78.75.241 – 10.78.75.246 | 10.78.75.247 |
| 128 | 10.78.75.248/29 | 10.78.75.249 – 10.78.75.254 | 10.78.75.255 |
| 129 | 10.78.76.0/29 | 10.78.76.1 – 10.78.76.6 | 10.78.76.7 |
| 130 | 10.78.76.8/29 | 10.78.76.9 – 10.78.76.14 | 10.78.76.15 |
| 131 | 10.78.76.16/29 | 10.78.76.17 – 10.78.76.22 | 10.78.76.23 |
| 132 | 10.78.76.24/29 | 10.78.76.25 – 10.78.76.30 | 10.78.76.31 |
| 133 | 10.78.76.32/29 | 10.78.76.33 – 10.78.76.38 | 10.78.76.39 |
| 134 | 10.78.76.40/29 | 10.78.76.41 – 10.78.76.46 | 10.78.76.47 |
| 135 | 10.78.76.48/29 | 10.78.76.49 – 10.78.76.54 | 10.78.76.55 |
| 136 | 10.78.76.56/29 | 10.78.76.57 – 10.78.76.62 | 10.78.76.63 |
| 137 | 10.78.76.64/29 | 10.78.76.65 – 10.78.76.70 | 10.78.76.71 |
| 138 | 10.78.76.72/29 | 10.78.76.73 – 10.78.76.78 | 10.78.76.79 |
| 139 | 10.78.76.80/29 | 10.78.76.81 – 10.78.76.86 | 10.78.76.87 |
| 140 | 10.78.76.88/29 | 10.78.76.89 – 10.78.76.94 | 10.78.76.95 |
| 141 | 10.78.76.96/29 | 10.78.76.97 – 10.78.76.102 | 10.78.76.103 |
| 142 | 10.78.76.104/29 | 10.78.76.105 – 10.78.76.110 | 10.78.76.111 |
| 143 | 10.78.76.112/29 | 10.78.76.113 – 10.78.76.118 | 10.78.76.119 |
| 144 | 10.78.76.120/29 | 10.78.76.121 – 10.78.76.126 | 10.78.76.127 |
| 145 | 10.78.76.128/29 | 10.78.76.129 – 10.78.76.134 | 10.78.76.135 |
| 146 | 10.78.76.136/29 | 10.78.76.137 – 10.78.76.142 | 10.78.76.143 |
| 147 | 10.78.76.144/29 | 10.78.76.145 – 10.78.76.150 | 10.78.76.151 |
| 148 | 10.78.76.152/29 | 10.78.76.153 – 10.78.76.158 | 10.78.76.159 |
| 149 | 10.78.76.160/29 | 10.78.76.161 – 10.78.76.166 | 10.78.76.167 |
| 150 | 10.78.76.168/29 | 10.78.76.169 – 10.78.76.174 | 10.78.76.175 |
| 151 | 10.78.76.176/29 | 10.78.76.177 – 10.78.76.182 | 10.78.76.183 |
| 152 | 10.78.76.184/29 | 10.78.76.185 – 10.78.76.190 | 10.78.76.191 |
| 153 | 10.78.76.192/29 | 10.78.76.193 – 10.78.76.198 | 10.78.76.199 |
| 154 | 10.78.76.200/29 | 10.78.76.201 – 10.78.76.206 | 10.78.76.207 |
| 155 | 10.78.76.208/29 | 10.78.76.209 – 10.78.76.214 | 10.78.76.215 |
| 156 | 10.78.76.216/29 | 10.78.76.217 – 10.78.76.222 | 10.78.76.223 |
| 157 | 10.78.76.224/29 | 10.78.76.225 – 10.78.76.230 | 10.78.76.231 |
| 158 | 10.78.76.232/29 | 10.78.76.233 – 10.78.76.238 | 10.78.76.239 |
| 159 | 10.78.76.240/29 | 10.78.76.241 – 10.78.76.246 | 10.78.76.247 |
| 160 | 10.78.76.248/29 | 10.78.76.249 – 10.78.76.254 | 10.78.76.255 |
| 161 | 10.78.77.0/29 | 10.78.77.1 – 10.78.77.6 | 10.78.77.7 |
| 162 | 10.78.77.8/29 | 10.78.77.9 – 10.78.77.14 | 10.78.77.15 |
| 163 | 10.78.77.16/29 | 10.78.77.17 – 10.78.77.22 | 10.78.77.23 |
| 164 | 10.78.77.24/29 | 10.78.77.25 – 10.78.77.30 | 10.78.77.31 |
| 165 | 10.78.77.32/29 | 10.78.77.33 – 10.78.77.38 | 10.78.77.39 |
| 166 | 10.78.77.40/29 | 10.78.77.41 – 10.78.77.46 | 10.78.77.47 |
| 167 | 10.78.77.48/29 | 10.78.77.49 – 10.78.77.54 | 10.78.77.55 |
| 168 | 10.78.77.56/29 | 10.78.77.57 – 10.78.77.62 | 10.78.77.63 |
| 169 | 10.78.77.64/29 | 10.78.77.65 – 10.78.77.70 | 10.78.77.71 |
| 170 | 10.78.77.72/29 | 10.78.77.73 – 10.78.77.78 | 10.78.77.79 |
| 171 | 10.78.77.80/29 | 10.78.77.81 – 10.78.77.86 | 10.78.77.87 |
| 172 | 10.78.77.88/29 | 10.78.77.89 – 10.78.77.94 | 10.78.77.95 |
| 173 | 10.78.77.96/29 | 10.78.77.97 – 10.78.77.102 | 10.78.77.103 |
| 174 | 10.78.77.104/29 | 10.78.77.105 – 10.78.77.110 | 10.78.77.111 |
| 175 | 10.78.77.112/29 | 10.78.77.113 – 10.78.77.118 | 10.78.77.119 |
| 176 | 10.78.77.120/29 | 10.78.77.121 – 10.78.77.126 | 10.78.77.127 |
| 177 | 10.78.77.128/29 | 10.78.77.129 – 10.78.77.134 | 10.78.77.135 |
| 178 | 10.78.77.136/29 | 10.78.77.137 – 10.78.77.142 | 10.78.77.143 |
| 179 | 10.78.77.144/29 | 10.78.77.145 – 10.78.77.150 | 10.78.77.151 |
| 180 | 10.78.77.152/29 | 10.78.77.153 – 10.78.77.158 | 10.78.77.159 |
| 181 | 10.78.77.160/29 | 10.78.77.161 – 10.78.77.166 | 10.78.77.167 |
| 182 | 10.78.77.168/29 | 10.78.77.169 – 10.78.77.174 | 10.78.77.175 |
| 183 | 10.78.77.176/29 | 10.78.77.177 – 10.78.77.182 | 10.78.77.183 |
| 184 | 10.78.77.184/29 | 10.78.77.185 – 10.78.77.190 | 10.78.77.191 |
| 185 | 10.78.77.192/29 | 10.78.77.193 – 10.78.77.198 | 10.78.77.199 |
| 186 | 10.78.77.200/29 | 10.78.77.201 – 10.78.77.206 | 10.78.77.207 |
| 187 | 10.78.77.208/29 | 10.78.77.209 – 10.78.77.214 | 10.78.77.215 |
| 188 | 10.78.77.216/29 | 10.78.77.217 – 10.78.77.222 | 10.78.77.223 |
| 189 | 10.78.77.224/29 | 10.78.77.225 – 10.78.77.230 | 10.78.77.231 |
| 190 | 10.78.77.232/29 | 10.78.77.233 – 10.78.77.238 | 10.78.77.239 |
| 191 | 10.78.77.240/29 | 10.78.77.241 – 10.78.77.246 | 10.78.77.247 |
| 192 | 10.78.77.248/29 | 10.78.77.249 – 10.78.77.254 | 10.78.77.255 |
| 193 | 10.78.78.0/29 | 10.78.78.1 – 10.78.78.6 | 10.78.78.7 |
| 194 | 10.78.78.8/29 | 10.78.78.9 – 10.78.78.14 | 10.78.78.15 |
| 195 | 10.78.78.16/29 | 10.78.78.17 – 10.78.78.22 | 10.78.78.23 |
| 196 | 10.78.78.24/29 | 10.78.78.25 – 10.78.78.30 | 10.78.78.31 |
| 197 | 10.78.78.32/29 | 10.78.78.33 – 10.78.78.38 | 10.78.78.39 |
| 198 | 10.78.78.40/29 | 10.78.78.41 – 10.78.78.46 | 10.78.78.47 |
| 199 | 10.78.78.48/29 | 10.78.78.49 – 10.78.78.54 | 10.78.78.55 |
| 200 | 10.78.78.56/29 | 10.78.78.57 – 10.78.78.62 | 10.78.78.63 |
| 201 | 10.78.78.64/29 | 10.78.78.65 – 10.78.78.70 | 10.78.78.71 |
| 202 | 10.78.78.72/29 | 10.78.78.73 – 10.78.78.78 | 10.78.78.79 |
| 203 | 10.78.78.80/29 | 10.78.78.81 – 10.78.78.86 | 10.78.78.87 |
| 204 | 10.78.78.88/29 | 10.78.78.89 – 10.78.78.94 | 10.78.78.95 |
| 205 | 10.78.78.96/29 | 10.78.78.97 – 10.78.78.102 | 10.78.78.103 |
| 206 | 10.78.78.104/29 | 10.78.78.105 – 10.78.78.110 | 10.78.78.111 |
| 207 | 10.78.78.112/29 | 10.78.78.113 – 10.78.78.118 | 10.78.78.119 |
| 208 | 10.78.78.120/29 | 10.78.78.121 – 10.78.78.126 | 10.78.78.127 |
| 209 | 10.78.78.128/29 | 10.78.78.129 – 10.78.78.134 | 10.78.78.135 |
| 210 | 10.78.78.136/29 | 10.78.78.137 – 10.78.78.142 | 10.78.78.143 |
| 211 | 10.78.78.144/29 | 10.78.78.145 – 10.78.78.150 | 10.78.78.151 |
| 212 | 10.78.78.152/29 | 10.78.78.153 – 10.78.78.158 | 10.78.78.159 |
| 213 | 10.78.78.160/29 | 10.78.78.161 – 10.78.78.166 | 10.78.78.167 |
| 214 | 10.78.78.168/29 | 10.78.78.169 – 10.78.78.174 | 10.78.78.175 |
| 215 | 10.78.78.176/29 | 10.78.78.177 – 10.78.78.182 | 10.78.78.183 |
| 216 | 10.78.78.184/29 | 10.78.78.185 – 10.78.78.190 | 10.78.78.191 |
| 217 | 10.78.78.192/29 | 10.78.78.193 – 10.78.78.198 | 10.78.78.199 |
| 218 | 10.78.78.200/29 | 10.78.78.201 – 10.78.78.206 | 10.78.78.207 |
| 219 | 10.78.78.208/29 | 10.78.78.209 – 10.78.78.214 | 10.78.78.215 |
| 220 | 10.78.78.216/29 | 10.78.78.217 – 10.78.78.222 | 10.78.78.223 |
| 221 | 10.78.78.224/29 | 10.78.78.225 – 10.78.78.230 | 10.78.78.231 |
| 222 | 10.78.78.232/29 | 10.78.78.233 – 10.78.78.238 | 10.78.78.239 |
| 223 | 10.78.78.240/29 | 10.78.78.241 – 10.78.78.246 | 10.78.78.247 |
| 224 | 10.78.78.248/29 | 10.78.78.249 – 10.78.78.254 | 10.78.78.255 |
| 225 | 10.78.79.0/29 | 10.78.79.1 – 10.78.79.6 | 10.78.79.7 |
| 226 | 10.78.79.8/29 | 10.78.79.9 – 10.78.79.14 | 10.78.79.15 |
| 227 | 10.78.79.16/29 | 10.78.79.17 – 10.78.79.22 | 10.78.79.23 |
| 228 | 10.78.79.24/29 | 10.78.79.25 – 10.78.79.30 | 10.78.79.31 |
| 229 | 10.78.79.32/29 | 10.78.79.33 – 10.78.79.38 | 10.78.79.39 |
| 230 | 10.78.79.40/29 | 10.78.79.41 – 10.78.79.46 | 10.78.79.47 |
| 231 | 10.78.79.48/29 | 10.78.79.49 – 10.78.79.54 | 10.78.79.55 |
| 232 | 10.78.79.56/29 | 10.78.79.57 – 10.78.79.62 | 10.78.79.63 |
| 233 | 10.78.79.64/29 | 10.78.79.65 – 10.78.79.70 | 10.78.79.71 |
| 234 | 10.78.79.72/29 | 10.78.79.73 – 10.78.79.78 | 10.78.79.79 |
| 235 | 10.78.79.80/29 | 10.78.79.81 – 10.78.79.86 | 10.78.79.87 |
| 236 | 10.78.79.88/29 | 10.78.79.89 – 10.78.79.94 | 10.78.79.95 |
| 237 | 10.78.79.96/29 | 10.78.79.97 – 10.78.79.102 | 10.78.79.103 |
| 238 | 10.78.79.104/29 | 10.78.79.105 – 10.78.79.110 | 10.78.79.111 |
| 239 | 10.78.79.112/29 | 10.78.79.113 – 10.78.79.118 | 10.78.79.119 |
| 240 | 10.78.79.120/29 | 10.78.79.121 – 10.78.79.126 | 10.78.79.127 |
| 241 | 10.78.79.128/29 | 10.78.79.129 – 10.78.79.134 | 10.78.79.135 |
| 242 | 10.78.79.136/29 | 10.78.79.137 – 10.78.79.142 | 10.78.79.143 |
| 243 | 10.78.79.144/29 | 10.78.79.145 – 10.78.79.150 | 10.78.79.151 |
| 244 | 10.78.79.152/29 | 10.78.79.153 – 10.78.79.158 | 10.78.79.159 |
| 245 | 10.78.79.160/29 | 10.78.79.161 – 10.78.79.166 | 10.78.79.167 |
| 246 | 10.78.79.168/29 | 10.78.79.169 – 10.78.79.174 | 10.78.79.175 |
| 247 | 10.78.79.176/29 | 10.78.79.177 – 10.78.79.182 | 10.78.79.183 |
| 248 | 10.78.79.184/29 | 10.78.79.185 – 10.78.79.190 | 10.78.79.191 |
| 249 | 10.78.79.192/29 | 10.78.79.193 – 10.78.79.198 | 10.78.79.199 |
| 250 | 10.78.79.200/29 | 10.78.79.201 – 10.78.79.206 | 10.78.79.207 |
| 251 | 10.78.79.208/29 | 10.78.79.209 – 10.78.79.214 | 10.78.79.215 |
| 252 | 10.78.79.216/29 | 10.78.79.217 – 10.78.79.222 | 10.78.79.223 |
| 253 | 10.78.79.224/29 | 10.78.79.225 – 10.78.79.230 | 10.78.79.231 |
| 254 | 10.78.79.232/29 | 10.78.79.233 – 10.78.79.238 | 10.78.79.239 |
| 255 | 10.78.79.240/29 | 10.78.79.241 – 10.78.79.246 | 10.78.79.247 |
| 256 | 10.78.79.248/29 | 10.78.79.249 – 10.78.79.254 | 10.78.79.255 |
01 / table
IPv4 CIDR prefix table.
Click a prefix longer than your network to split it into subnets.
| prefix | subnet mask | addresses | hosts | in your /21 |
|---|---|---|---|---|
| /0 | 0.0.0.0 | 4,294,967,296 | 4,294,967,294 | - |
| /1 | 128.0.0.0 | 2,147,483,648 | 2,147,483,646 | - |
| /2 | 192.0.0.0 | 1,073,741,824 | 1,073,741,822 | - |
| /3 | 224.0.0.0 | 536,870,912 | 536,870,910 | - |
| /4 | 240.0.0.0 | 268,435,456 | 268,435,454 | - |
| /5 | 248.0.0.0 | 134,217,728 | 134,217,726 | - |
| /6 | 252.0.0.0 | 67,108,864 | 67,108,862 | - |
| /7 | 254.0.0.0 | 33,554,432 | 33,554,430 | - |
| /8 | 255.0.0.0 | 16,777,216 | 16,777,214 | - |
| /9 | 255.128.0.0 | 8,388,608 | 8,388,606 | - |
| /10 | 255.192.0.0 | 4,194,304 | 4,194,302 | - |
| /11 | 255.224.0.0 | 2,097,152 | 2,097,150 | - |
| /12 | 255.240.0.0 | 1,048,576 | 1,048,574 | - |
| /13 | 255.248.0.0 | 524,288 | 524,286 | - |
| /14 | 255.252.0.0 | 262,144 | 262,142 | - |
| /15 | 255.254.0.0 | 131,072 | 131,070 | - |
| /16 | 255.255.0.0 | 65,536 | 65,534 | - |
| /17 | 255.255.128.0 | 32,768 | 32,766 | - |
| /18 | 255.255.192.0 | 16,384 | 16,382 | - |
| /19 | 255.255.224.0 | 8,192 | 8,190 | - |
| /20 | 255.255.240.0 | 4,096 | 4,094 | - |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 1 |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 2 split → |
| /23 | 255.255.254.0 | 512 | 510 | 4 split → |
| /24 | 255.255.255.0 | 256 | 254 | 8 split → |
| /25 | 255.255.255.128 | 128 | 126 | 16 split → |
| /26 | 255.255.255.192 | 64 | 62 | 32 split → |
| /27 | 255.255.255.224 | 32 | 30 | 64 split → |
| /28 | 255.255.255.240 | 16 | 14 | 128 split → |
| /29 | 255.255.255.248 | 8 | 6 | 256 split → |
| /30 | 255.255.255.252 | 4 | 2 | 512 split → |
| /31 | 255.255.255.254 | 2 | 2 | 1,024 split → |
| /32 | 255.255.255.255 | 1 | 1 | 2,048 split → |
02 / faq
About this calculator.
How do I use this subnet calculator?
▼
Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.
Why are usable hosts always 2 fewer?
▼
The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.
Can I use it from a terminal?
▼
Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.