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)10.20.0.0/18
network10.20.0.0/18
broadcast10.20.63.255
first host10.20.0.1
last host10.20.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.20.0.0/18
address00001010.00010100.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00010100.00000000.00000000
broadcast00001010.00010100.00111111.11111111
green = network part, grey = host part
hex0x0a140000
decimal169082880
reverse dns0.0.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:0
/18 split into /31 · 8,192 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.20.0.0/31 | 10.20.0.0 – 10.20.0.1 | 10.20.0.1 |
| 2 | 10.20.0.2/31 | 10.20.0.2 – 10.20.0.3 | 10.20.0.3 |
| 3 | 10.20.0.4/31 | 10.20.0.4 – 10.20.0.5 | 10.20.0.5 |
| 4 | 10.20.0.6/31 | 10.20.0.6 – 10.20.0.7 | 10.20.0.7 |
| 5 | 10.20.0.8/31 | 10.20.0.8 – 10.20.0.9 | 10.20.0.9 |
| 6 | 10.20.0.10/31 | 10.20.0.10 – 10.20.0.11 | 10.20.0.11 |
| 7 | 10.20.0.12/31 | 10.20.0.12 – 10.20.0.13 | 10.20.0.13 |
| 8 | 10.20.0.14/31 | 10.20.0.14 – 10.20.0.15 | 10.20.0.15 |
| 9 | 10.20.0.16/31 | 10.20.0.16 – 10.20.0.17 | 10.20.0.17 |
| 10 | 10.20.0.18/31 | 10.20.0.18 – 10.20.0.19 | 10.20.0.19 |
| 11 | 10.20.0.20/31 | 10.20.0.20 – 10.20.0.21 | 10.20.0.21 |
| 12 | 10.20.0.22/31 | 10.20.0.22 – 10.20.0.23 | 10.20.0.23 |
| 13 | 10.20.0.24/31 | 10.20.0.24 – 10.20.0.25 | 10.20.0.25 |
| 14 | 10.20.0.26/31 | 10.20.0.26 – 10.20.0.27 | 10.20.0.27 |
| 15 | 10.20.0.28/31 | 10.20.0.28 – 10.20.0.29 | 10.20.0.29 |
| 16 | 10.20.0.30/31 | 10.20.0.30 – 10.20.0.31 | 10.20.0.31 |
| 17 | 10.20.0.32/31 | 10.20.0.32 – 10.20.0.33 | 10.20.0.33 |
| 18 | 10.20.0.34/31 | 10.20.0.34 – 10.20.0.35 | 10.20.0.35 |
| 19 | 10.20.0.36/31 | 10.20.0.36 – 10.20.0.37 | 10.20.0.37 |
| 20 | 10.20.0.38/31 | 10.20.0.38 – 10.20.0.39 | 10.20.0.39 |
| 21 | 10.20.0.40/31 | 10.20.0.40 – 10.20.0.41 | 10.20.0.41 |
| 22 | 10.20.0.42/31 | 10.20.0.42 – 10.20.0.43 | 10.20.0.43 |
| 23 | 10.20.0.44/31 | 10.20.0.44 – 10.20.0.45 | 10.20.0.45 |
| 24 | 10.20.0.46/31 | 10.20.0.46 – 10.20.0.47 | 10.20.0.47 |
| 25 | 10.20.0.48/31 | 10.20.0.48 – 10.20.0.49 | 10.20.0.49 |
| 26 | 10.20.0.50/31 | 10.20.0.50 – 10.20.0.51 | 10.20.0.51 |
| 27 | 10.20.0.52/31 | 10.20.0.52 – 10.20.0.53 | 10.20.0.53 |
| 28 | 10.20.0.54/31 | 10.20.0.54 – 10.20.0.55 | 10.20.0.55 |
| 29 | 10.20.0.56/31 | 10.20.0.56 – 10.20.0.57 | 10.20.0.57 |
| 30 | 10.20.0.58/31 | 10.20.0.58 – 10.20.0.59 | 10.20.0.59 |
| 31 | 10.20.0.60/31 | 10.20.0.60 – 10.20.0.61 | 10.20.0.61 |
| 32 | 10.20.0.62/31 | 10.20.0.62 – 10.20.0.63 | 10.20.0.63 |
| 33 | 10.20.0.64/31 | 10.20.0.64 – 10.20.0.65 | 10.20.0.65 |
| 34 | 10.20.0.66/31 | 10.20.0.66 – 10.20.0.67 | 10.20.0.67 |
| 35 | 10.20.0.68/31 | 10.20.0.68 – 10.20.0.69 | 10.20.0.69 |
| 36 | 10.20.0.70/31 | 10.20.0.70 – 10.20.0.71 | 10.20.0.71 |
| 37 | 10.20.0.72/31 | 10.20.0.72 – 10.20.0.73 | 10.20.0.73 |
| 38 | 10.20.0.74/31 | 10.20.0.74 – 10.20.0.75 | 10.20.0.75 |
| 39 | 10.20.0.76/31 | 10.20.0.76 – 10.20.0.77 | 10.20.0.77 |
| 40 | 10.20.0.78/31 | 10.20.0.78 – 10.20.0.79 | 10.20.0.79 |
| 41 | 10.20.0.80/31 | 10.20.0.80 – 10.20.0.81 | 10.20.0.81 |
| 42 | 10.20.0.82/31 | 10.20.0.82 – 10.20.0.83 | 10.20.0.83 |
| 43 | 10.20.0.84/31 | 10.20.0.84 – 10.20.0.85 | 10.20.0.85 |
| 44 | 10.20.0.86/31 | 10.20.0.86 – 10.20.0.87 | 10.20.0.87 |
| 45 | 10.20.0.88/31 | 10.20.0.88 – 10.20.0.89 | 10.20.0.89 |
| 46 | 10.20.0.90/31 | 10.20.0.90 – 10.20.0.91 | 10.20.0.91 |
| 47 | 10.20.0.92/31 | 10.20.0.92 – 10.20.0.93 | 10.20.0.93 |
| 48 | 10.20.0.94/31 | 10.20.0.94 – 10.20.0.95 | 10.20.0.95 |
| 49 | 10.20.0.96/31 | 10.20.0.96 – 10.20.0.97 | 10.20.0.97 |
| 50 | 10.20.0.98/31 | 10.20.0.98 – 10.20.0.99 | 10.20.0.99 |
| 51 | 10.20.0.100/31 | 10.20.0.100 – 10.20.0.101 | 10.20.0.101 |
| 52 | 10.20.0.102/31 | 10.20.0.102 – 10.20.0.103 | 10.20.0.103 |
| 53 | 10.20.0.104/31 | 10.20.0.104 – 10.20.0.105 | 10.20.0.105 |
| 54 | 10.20.0.106/31 | 10.20.0.106 – 10.20.0.107 | 10.20.0.107 |
| 55 | 10.20.0.108/31 | 10.20.0.108 – 10.20.0.109 | 10.20.0.109 |
| 56 | 10.20.0.110/31 | 10.20.0.110 – 10.20.0.111 | 10.20.0.111 |
| 57 | 10.20.0.112/31 | 10.20.0.112 – 10.20.0.113 | 10.20.0.113 |
| 58 | 10.20.0.114/31 | 10.20.0.114 – 10.20.0.115 | 10.20.0.115 |
| 59 | 10.20.0.116/31 | 10.20.0.116 – 10.20.0.117 | 10.20.0.117 |
| 60 | 10.20.0.118/31 | 10.20.0.118 – 10.20.0.119 | 10.20.0.119 |
| 61 | 10.20.0.120/31 | 10.20.0.120 – 10.20.0.121 | 10.20.0.121 |
| 62 | 10.20.0.122/31 | 10.20.0.122 – 10.20.0.123 | 10.20.0.123 |
| 63 | 10.20.0.124/31 | 10.20.0.124 – 10.20.0.125 | 10.20.0.125 |
| 64 | 10.20.0.126/31 | 10.20.0.126 – 10.20.0.127 | 10.20.0.127 |
| 65 | 10.20.0.128/31 | 10.20.0.128 – 10.20.0.129 | 10.20.0.129 |
| 66 | 10.20.0.130/31 | 10.20.0.130 – 10.20.0.131 | 10.20.0.131 |
| 67 | 10.20.0.132/31 | 10.20.0.132 – 10.20.0.133 | 10.20.0.133 |
| 68 | 10.20.0.134/31 | 10.20.0.134 – 10.20.0.135 | 10.20.0.135 |
| 69 | 10.20.0.136/31 | 10.20.0.136 – 10.20.0.137 | 10.20.0.137 |
| 70 | 10.20.0.138/31 | 10.20.0.138 – 10.20.0.139 | 10.20.0.139 |
| 71 | 10.20.0.140/31 | 10.20.0.140 – 10.20.0.141 | 10.20.0.141 |
| 72 | 10.20.0.142/31 | 10.20.0.142 – 10.20.0.143 | 10.20.0.143 |
| 73 | 10.20.0.144/31 | 10.20.0.144 – 10.20.0.145 | 10.20.0.145 |
| 74 | 10.20.0.146/31 | 10.20.0.146 – 10.20.0.147 | 10.20.0.147 |
| 75 | 10.20.0.148/31 | 10.20.0.148 – 10.20.0.149 | 10.20.0.149 |
| 76 | 10.20.0.150/31 | 10.20.0.150 – 10.20.0.151 | 10.20.0.151 |
| 77 | 10.20.0.152/31 | 10.20.0.152 – 10.20.0.153 | 10.20.0.153 |
| 78 | 10.20.0.154/31 | 10.20.0.154 – 10.20.0.155 | 10.20.0.155 |
| 79 | 10.20.0.156/31 | 10.20.0.156 – 10.20.0.157 | 10.20.0.157 |
| 80 | 10.20.0.158/31 | 10.20.0.158 – 10.20.0.159 | 10.20.0.159 |
| 81 | 10.20.0.160/31 | 10.20.0.160 – 10.20.0.161 | 10.20.0.161 |
| 82 | 10.20.0.162/31 | 10.20.0.162 – 10.20.0.163 | 10.20.0.163 |
| 83 | 10.20.0.164/31 | 10.20.0.164 – 10.20.0.165 | 10.20.0.165 |
| 84 | 10.20.0.166/31 | 10.20.0.166 – 10.20.0.167 | 10.20.0.167 |
| 85 | 10.20.0.168/31 | 10.20.0.168 – 10.20.0.169 | 10.20.0.169 |
| 86 | 10.20.0.170/31 | 10.20.0.170 – 10.20.0.171 | 10.20.0.171 |
| 87 | 10.20.0.172/31 | 10.20.0.172 – 10.20.0.173 | 10.20.0.173 |
| 88 | 10.20.0.174/31 | 10.20.0.174 – 10.20.0.175 | 10.20.0.175 |
| 89 | 10.20.0.176/31 | 10.20.0.176 – 10.20.0.177 | 10.20.0.177 |
| 90 | 10.20.0.178/31 | 10.20.0.178 – 10.20.0.179 | 10.20.0.179 |
| 91 | 10.20.0.180/31 | 10.20.0.180 – 10.20.0.181 | 10.20.0.181 |
| 92 | 10.20.0.182/31 | 10.20.0.182 – 10.20.0.183 | 10.20.0.183 |
| 93 | 10.20.0.184/31 | 10.20.0.184 – 10.20.0.185 | 10.20.0.185 |
| 94 | 10.20.0.186/31 | 10.20.0.186 – 10.20.0.187 | 10.20.0.187 |
| 95 | 10.20.0.188/31 | 10.20.0.188 – 10.20.0.189 | 10.20.0.189 |
| 96 | 10.20.0.190/31 | 10.20.0.190 – 10.20.0.191 | 10.20.0.191 |
| 97 | 10.20.0.192/31 | 10.20.0.192 – 10.20.0.193 | 10.20.0.193 |
| 98 | 10.20.0.194/31 | 10.20.0.194 – 10.20.0.195 | 10.20.0.195 |
| 99 | 10.20.0.196/31 | 10.20.0.196 – 10.20.0.197 | 10.20.0.197 |
| 100 | 10.20.0.198/31 | 10.20.0.198 – 10.20.0.199 | 10.20.0.199 |
| 101 | 10.20.0.200/31 | 10.20.0.200 – 10.20.0.201 | 10.20.0.201 |
| 102 | 10.20.0.202/31 | 10.20.0.202 – 10.20.0.203 | 10.20.0.203 |
| 103 | 10.20.0.204/31 | 10.20.0.204 – 10.20.0.205 | 10.20.0.205 |
| 104 | 10.20.0.206/31 | 10.20.0.206 – 10.20.0.207 | 10.20.0.207 |
| 105 | 10.20.0.208/31 | 10.20.0.208 – 10.20.0.209 | 10.20.0.209 |
| 106 | 10.20.0.210/31 | 10.20.0.210 – 10.20.0.211 | 10.20.0.211 |
| 107 | 10.20.0.212/31 | 10.20.0.212 – 10.20.0.213 | 10.20.0.213 |
| 108 | 10.20.0.214/31 | 10.20.0.214 – 10.20.0.215 | 10.20.0.215 |
| 109 | 10.20.0.216/31 | 10.20.0.216 – 10.20.0.217 | 10.20.0.217 |
| 110 | 10.20.0.218/31 | 10.20.0.218 – 10.20.0.219 | 10.20.0.219 |
| 111 | 10.20.0.220/31 | 10.20.0.220 – 10.20.0.221 | 10.20.0.221 |
| 112 | 10.20.0.222/31 | 10.20.0.222 – 10.20.0.223 | 10.20.0.223 |
| 113 | 10.20.0.224/31 | 10.20.0.224 – 10.20.0.225 | 10.20.0.225 |
| 114 | 10.20.0.226/31 | 10.20.0.226 – 10.20.0.227 | 10.20.0.227 |
| 115 | 10.20.0.228/31 | 10.20.0.228 – 10.20.0.229 | 10.20.0.229 |
| 116 | 10.20.0.230/31 | 10.20.0.230 – 10.20.0.231 | 10.20.0.231 |
| 117 | 10.20.0.232/31 | 10.20.0.232 – 10.20.0.233 | 10.20.0.233 |
| 118 | 10.20.0.234/31 | 10.20.0.234 – 10.20.0.235 | 10.20.0.235 |
| 119 | 10.20.0.236/31 | 10.20.0.236 – 10.20.0.237 | 10.20.0.237 |
| 120 | 10.20.0.238/31 | 10.20.0.238 – 10.20.0.239 | 10.20.0.239 |
| 121 | 10.20.0.240/31 | 10.20.0.240 – 10.20.0.241 | 10.20.0.241 |
| 122 | 10.20.0.242/31 | 10.20.0.242 – 10.20.0.243 | 10.20.0.243 |
| 123 | 10.20.0.244/31 | 10.20.0.244 – 10.20.0.245 | 10.20.0.245 |
| 124 | 10.20.0.246/31 | 10.20.0.246 – 10.20.0.247 | 10.20.0.247 |
| 125 | 10.20.0.248/31 | 10.20.0.248 – 10.20.0.249 | 10.20.0.249 |
| 126 | 10.20.0.250/31 | 10.20.0.250 – 10.20.0.251 | 10.20.0.251 |
| 127 | 10.20.0.252/31 | 10.20.0.252 – 10.20.0.253 | 10.20.0.253 |
| 128 | 10.20.0.254/31 | 10.20.0.254 – 10.20.0.255 | 10.20.0.255 |
| 129 | 10.20.1.0/31 | 10.20.1.0 – 10.20.1.1 | 10.20.1.1 |
| 130 | 10.20.1.2/31 | 10.20.1.2 – 10.20.1.3 | 10.20.1.3 |
| 131 | 10.20.1.4/31 | 10.20.1.4 – 10.20.1.5 | 10.20.1.5 |
| 132 | 10.20.1.6/31 | 10.20.1.6 – 10.20.1.7 | 10.20.1.7 |
| 133 | 10.20.1.8/31 | 10.20.1.8 – 10.20.1.9 | 10.20.1.9 |
| 134 | 10.20.1.10/31 | 10.20.1.10 – 10.20.1.11 | 10.20.1.11 |
| 135 | 10.20.1.12/31 | 10.20.1.12 – 10.20.1.13 | 10.20.1.13 |
| 136 | 10.20.1.14/31 | 10.20.1.14 – 10.20.1.15 | 10.20.1.15 |
| 137 | 10.20.1.16/31 | 10.20.1.16 – 10.20.1.17 | 10.20.1.17 |
| 138 | 10.20.1.18/31 | 10.20.1.18 – 10.20.1.19 | 10.20.1.19 |
| 139 | 10.20.1.20/31 | 10.20.1.20 – 10.20.1.21 | 10.20.1.21 |
| 140 | 10.20.1.22/31 | 10.20.1.22 – 10.20.1.23 | 10.20.1.23 |
| 141 | 10.20.1.24/31 | 10.20.1.24 – 10.20.1.25 | 10.20.1.25 |
| 142 | 10.20.1.26/31 | 10.20.1.26 – 10.20.1.27 | 10.20.1.27 |
| 143 | 10.20.1.28/31 | 10.20.1.28 – 10.20.1.29 | 10.20.1.29 |
| 144 | 10.20.1.30/31 | 10.20.1.30 – 10.20.1.31 | 10.20.1.31 |
| 145 | 10.20.1.32/31 | 10.20.1.32 – 10.20.1.33 | 10.20.1.33 |
| 146 | 10.20.1.34/31 | 10.20.1.34 – 10.20.1.35 | 10.20.1.35 |
| 147 | 10.20.1.36/31 | 10.20.1.36 – 10.20.1.37 | 10.20.1.37 |
| 148 | 10.20.1.38/31 | 10.20.1.38 – 10.20.1.39 | 10.20.1.39 |
| 149 | 10.20.1.40/31 | 10.20.1.40 – 10.20.1.41 | 10.20.1.41 |
| 150 | 10.20.1.42/31 | 10.20.1.42 – 10.20.1.43 | 10.20.1.43 |
| 151 | 10.20.1.44/31 | 10.20.1.44 – 10.20.1.45 | 10.20.1.45 |
| 152 | 10.20.1.46/31 | 10.20.1.46 – 10.20.1.47 | 10.20.1.47 |
| 153 | 10.20.1.48/31 | 10.20.1.48 – 10.20.1.49 | 10.20.1.49 |
| 154 | 10.20.1.50/31 | 10.20.1.50 – 10.20.1.51 | 10.20.1.51 |
| 155 | 10.20.1.52/31 | 10.20.1.52 – 10.20.1.53 | 10.20.1.53 |
| 156 | 10.20.1.54/31 | 10.20.1.54 – 10.20.1.55 | 10.20.1.55 |
| 157 | 10.20.1.56/31 | 10.20.1.56 – 10.20.1.57 | 10.20.1.57 |
| 158 | 10.20.1.58/31 | 10.20.1.58 – 10.20.1.59 | 10.20.1.59 |
| 159 | 10.20.1.60/31 | 10.20.1.60 – 10.20.1.61 | 10.20.1.61 |
| 160 | 10.20.1.62/31 | 10.20.1.62 – 10.20.1.63 | 10.20.1.63 |
| 161 | 10.20.1.64/31 | 10.20.1.64 – 10.20.1.65 | 10.20.1.65 |
| 162 | 10.20.1.66/31 | 10.20.1.66 – 10.20.1.67 | 10.20.1.67 |
| 163 | 10.20.1.68/31 | 10.20.1.68 – 10.20.1.69 | 10.20.1.69 |
| 164 | 10.20.1.70/31 | 10.20.1.70 – 10.20.1.71 | 10.20.1.71 |
| 165 | 10.20.1.72/31 | 10.20.1.72 – 10.20.1.73 | 10.20.1.73 |
| 166 | 10.20.1.74/31 | 10.20.1.74 – 10.20.1.75 | 10.20.1.75 |
| 167 | 10.20.1.76/31 | 10.20.1.76 – 10.20.1.77 | 10.20.1.77 |
| 168 | 10.20.1.78/31 | 10.20.1.78 – 10.20.1.79 | 10.20.1.79 |
| 169 | 10.20.1.80/31 | 10.20.1.80 – 10.20.1.81 | 10.20.1.81 |
| 170 | 10.20.1.82/31 | 10.20.1.82 – 10.20.1.83 | 10.20.1.83 |
| 171 | 10.20.1.84/31 | 10.20.1.84 – 10.20.1.85 | 10.20.1.85 |
| 172 | 10.20.1.86/31 | 10.20.1.86 – 10.20.1.87 | 10.20.1.87 |
| 173 | 10.20.1.88/31 | 10.20.1.88 – 10.20.1.89 | 10.20.1.89 |
| 174 | 10.20.1.90/31 | 10.20.1.90 – 10.20.1.91 | 10.20.1.91 |
| 175 | 10.20.1.92/31 | 10.20.1.92 – 10.20.1.93 | 10.20.1.93 |
| 176 | 10.20.1.94/31 | 10.20.1.94 – 10.20.1.95 | 10.20.1.95 |
| 177 | 10.20.1.96/31 | 10.20.1.96 – 10.20.1.97 | 10.20.1.97 |
| 178 | 10.20.1.98/31 | 10.20.1.98 – 10.20.1.99 | 10.20.1.99 |
| 179 | 10.20.1.100/31 | 10.20.1.100 – 10.20.1.101 | 10.20.1.101 |
| 180 | 10.20.1.102/31 | 10.20.1.102 – 10.20.1.103 | 10.20.1.103 |
| 181 | 10.20.1.104/31 | 10.20.1.104 – 10.20.1.105 | 10.20.1.105 |
| 182 | 10.20.1.106/31 | 10.20.1.106 – 10.20.1.107 | 10.20.1.107 |
| 183 | 10.20.1.108/31 | 10.20.1.108 – 10.20.1.109 | 10.20.1.109 |
| 184 | 10.20.1.110/31 | 10.20.1.110 – 10.20.1.111 | 10.20.1.111 |
| 185 | 10.20.1.112/31 | 10.20.1.112 – 10.20.1.113 | 10.20.1.113 |
| 186 | 10.20.1.114/31 | 10.20.1.114 – 10.20.1.115 | 10.20.1.115 |
| 187 | 10.20.1.116/31 | 10.20.1.116 – 10.20.1.117 | 10.20.1.117 |
| 188 | 10.20.1.118/31 | 10.20.1.118 – 10.20.1.119 | 10.20.1.119 |
| 189 | 10.20.1.120/31 | 10.20.1.120 – 10.20.1.121 | 10.20.1.121 |
| 190 | 10.20.1.122/31 | 10.20.1.122 – 10.20.1.123 | 10.20.1.123 |
| 191 | 10.20.1.124/31 | 10.20.1.124 – 10.20.1.125 | 10.20.1.125 |
| 192 | 10.20.1.126/31 | 10.20.1.126 – 10.20.1.127 | 10.20.1.127 |
| 193 | 10.20.1.128/31 | 10.20.1.128 – 10.20.1.129 | 10.20.1.129 |
| 194 | 10.20.1.130/31 | 10.20.1.130 – 10.20.1.131 | 10.20.1.131 |
| 195 | 10.20.1.132/31 | 10.20.1.132 – 10.20.1.133 | 10.20.1.133 |
| 196 | 10.20.1.134/31 | 10.20.1.134 – 10.20.1.135 | 10.20.1.135 |
| 197 | 10.20.1.136/31 | 10.20.1.136 – 10.20.1.137 | 10.20.1.137 |
| 198 | 10.20.1.138/31 | 10.20.1.138 – 10.20.1.139 | 10.20.1.139 |
| 199 | 10.20.1.140/31 | 10.20.1.140 – 10.20.1.141 | 10.20.1.141 |
| 200 | 10.20.1.142/31 | 10.20.1.142 – 10.20.1.143 | 10.20.1.143 |
| 201 | 10.20.1.144/31 | 10.20.1.144 – 10.20.1.145 | 10.20.1.145 |
| 202 | 10.20.1.146/31 | 10.20.1.146 – 10.20.1.147 | 10.20.1.147 |
| 203 | 10.20.1.148/31 | 10.20.1.148 – 10.20.1.149 | 10.20.1.149 |
| 204 | 10.20.1.150/31 | 10.20.1.150 – 10.20.1.151 | 10.20.1.151 |
| 205 | 10.20.1.152/31 | 10.20.1.152 – 10.20.1.153 | 10.20.1.153 |
| 206 | 10.20.1.154/31 | 10.20.1.154 – 10.20.1.155 | 10.20.1.155 |
| 207 | 10.20.1.156/31 | 10.20.1.156 – 10.20.1.157 | 10.20.1.157 |
| 208 | 10.20.1.158/31 | 10.20.1.158 – 10.20.1.159 | 10.20.1.159 |
| 209 | 10.20.1.160/31 | 10.20.1.160 – 10.20.1.161 | 10.20.1.161 |
| 210 | 10.20.1.162/31 | 10.20.1.162 – 10.20.1.163 | 10.20.1.163 |
| 211 | 10.20.1.164/31 | 10.20.1.164 – 10.20.1.165 | 10.20.1.165 |
| 212 | 10.20.1.166/31 | 10.20.1.166 – 10.20.1.167 | 10.20.1.167 |
| 213 | 10.20.1.168/31 | 10.20.1.168 – 10.20.1.169 | 10.20.1.169 |
| 214 | 10.20.1.170/31 | 10.20.1.170 – 10.20.1.171 | 10.20.1.171 |
| 215 | 10.20.1.172/31 | 10.20.1.172 – 10.20.1.173 | 10.20.1.173 |
| 216 | 10.20.1.174/31 | 10.20.1.174 – 10.20.1.175 | 10.20.1.175 |
| 217 | 10.20.1.176/31 | 10.20.1.176 – 10.20.1.177 | 10.20.1.177 |
| 218 | 10.20.1.178/31 | 10.20.1.178 – 10.20.1.179 | 10.20.1.179 |
| 219 | 10.20.1.180/31 | 10.20.1.180 – 10.20.1.181 | 10.20.1.181 |
| 220 | 10.20.1.182/31 | 10.20.1.182 – 10.20.1.183 | 10.20.1.183 |
| 221 | 10.20.1.184/31 | 10.20.1.184 – 10.20.1.185 | 10.20.1.185 |
| 222 | 10.20.1.186/31 | 10.20.1.186 – 10.20.1.187 | 10.20.1.187 |
| 223 | 10.20.1.188/31 | 10.20.1.188 – 10.20.1.189 | 10.20.1.189 |
| 224 | 10.20.1.190/31 | 10.20.1.190 – 10.20.1.191 | 10.20.1.191 |
| 225 | 10.20.1.192/31 | 10.20.1.192 – 10.20.1.193 | 10.20.1.193 |
| 226 | 10.20.1.194/31 | 10.20.1.194 – 10.20.1.195 | 10.20.1.195 |
| 227 | 10.20.1.196/31 | 10.20.1.196 – 10.20.1.197 | 10.20.1.197 |
| 228 | 10.20.1.198/31 | 10.20.1.198 – 10.20.1.199 | 10.20.1.199 |
| 229 | 10.20.1.200/31 | 10.20.1.200 – 10.20.1.201 | 10.20.1.201 |
| 230 | 10.20.1.202/31 | 10.20.1.202 – 10.20.1.203 | 10.20.1.203 |
| 231 | 10.20.1.204/31 | 10.20.1.204 – 10.20.1.205 | 10.20.1.205 |
| 232 | 10.20.1.206/31 | 10.20.1.206 – 10.20.1.207 | 10.20.1.207 |
| 233 | 10.20.1.208/31 | 10.20.1.208 – 10.20.1.209 | 10.20.1.209 |
| 234 | 10.20.1.210/31 | 10.20.1.210 – 10.20.1.211 | 10.20.1.211 |
| 235 | 10.20.1.212/31 | 10.20.1.212 – 10.20.1.213 | 10.20.1.213 |
| 236 | 10.20.1.214/31 | 10.20.1.214 – 10.20.1.215 | 10.20.1.215 |
| 237 | 10.20.1.216/31 | 10.20.1.216 – 10.20.1.217 | 10.20.1.217 |
| 238 | 10.20.1.218/31 | 10.20.1.218 – 10.20.1.219 | 10.20.1.219 |
| 239 | 10.20.1.220/31 | 10.20.1.220 – 10.20.1.221 | 10.20.1.221 |
| 240 | 10.20.1.222/31 | 10.20.1.222 – 10.20.1.223 | 10.20.1.223 |
| 241 | 10.20.1.224/31 | 10.20.1.224 – 10.20.1.225 | 10.20.1.225 |
| 242 | 10.20.1.226/31 | 10.20.1.226 – 10.20.1.227 | 10.20.1.227 |
| 243 | 10.20.1.228/31 | 10.20.1.228 – 10.20.1.229 | 10.20.1.229 |
| 244 | 10.20.1.230/31 | 10.20.1.230 – 10.20.1.231 | 10.20.1.231 |
| 245 | 10.20.1.232/31 | 10.20.1.232 – 10.20.1.233 | 10.20.1.233 |
| 246 | 10.20.1.234/31 | 10.20.1.234 – 10.20.1.235 | 10.20.1.235 |
| 247 | 10.20.1.236/31 | 10.20.1.236 – 10.20.1.237 | 10.20.1.237 |
| 248 | 10.20.1.238/31 | 10.20.1.238 – 10.20.1.239 | 10.20.1.239 |
| 249 | 10.20.1.240/31 | 10.20.1.240 – 10.20.1.241 | 10.20.1.241 |
| 250 | 10.20.1.242/31 | 10.20.1.242 – 10.20.1.243 | 10.20.1.243 |
| 251 | 10.20.1.244/31 | 10.20.1.244 – 10.20.1.245 | 10.20.1.245 |
| 252 | 10.20.1.246/31 | 10.20.1.246 – 10.20.1.247 | 10.20.1.247 |
| 253 | 10.20.1.248/31 | 10.20.1.248 – 10.20.1.249 | 10.20.1.249 |
| 254 | 10.20.1.250/31 | 10.20.1.250 – 10.20.1.251 | 10.20.1.251 |
| 255 | 10.20.1.252/31 | 10.20.1.252 – 10.20.1.253 | 10.20.1.253 |
| 256 | 10.20.1.254/31 | 10.20.1.254 – 10.20.1.255 | 10.20.1.255 |
showing 256 of 8,192
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 /18 |
|---|---|---|---|---|
| /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 | 1 |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 2 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 4 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 8 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 16 split → |
| /23 | 255.255.254.0 | 512 | 510 | 32 split → |
| /24 | 255.255.255.0 | 256 | 254 | 64 split → |
| /25 | 255.255.255.128 | 128 | 126 | 128 split → |
| /26 | 255.255.255.192 | 64 | 62 | 256 split → |
| /27 | 255.255.255.224 | 32 | 30 | 512 split → |
| /28 | 255.255.255.240 | 16 | 14 | 1,024 split → |
| /29 | 255.255.255.248 | 8 | 6 | 2,048 split → |
| /30 | 255.255.255.252 | 4 | 2 | 4,096 split → |
| /31 | 255.255.255.254 | 2 | 2 | 8,192 split → |
| /32 | 255.255.255.255 | 1 | 1 | 16,384 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.