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)10.4.208.0/21
network10.4.208.0/21
broadcast10.4.215.255
first host10.4.208.1
last host10.4.215.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.4.208.0/21
address00001010.00000100.11010000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000100.11010000.00000000
broadcast00001010.00000100.11010111.11111111
green = network part, grey = host part
hex0x0a04d000
decimal168087552
reverse dns0.208.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:d000
/21 split into /31 · 1,024 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.4.208.0/31 | 10.4.208.0 – 10.4.208.1 | 10.4.208.1 |
| 2 | 10.4.208.2/31 | 10.4.208.2 – 10.4.208.3 | 10.4.208.3 |
| 3 | 10.4.208.4/31 | 10.4.208.4 – 10.4.208.5 | 10.4.208.5 |
| 4 | 10.4.208.6/31 | 10.4.208.6 – 10.4.208.7 | 10.4.208.7 |
| 5 | 10.4.208.8/31 | 10.4.208.8 – 10.4.208.9 | 10.4.208.9 |
| 6 | 10.4.208.10/31 | 10.4.208.10 – 10.4.208.11 | 10.4.208.11 |
| 7 | 10.4.208.12/31 | 10.4.208.12 – 10.4.208.13 | 10.4.208.13 |
| 8 | 10.4.208.14/31 | 10.4.208.14 – 10.4.208.15 | 10.4.208.15 |
| 9 | 10.4.208.16/31 | 10.4.208.16 – 10.4.208.17 | 10.4.208.17 |
| 10 | 10.4.208.18/31 | 10.4.208.18 – 10.4.208.19 | 10.4.208.19 |
| 11 | 10.4.208.20/31 | 10.4.208.20 – 10.4.208.21 | 10.4.208.21 |
| 12 | 10.4.208.22/31 | 10.4.208.22 – 10.4.208.23 | 10.4.208.23 |
| 13 | 10.4.208.24/31 | 10.4.208.24 – 10.4.208.25 | 10.4.208.25 |
| 14 | 10.4.208.26/31 | 10.4.208.26 – 10.4.208.27 | 10.4.208.27 |
| 15 | 10.4.208.28/31 | 10.4.208.28 – 10.4.208.29 | 10.4.208.29 |
| 16 | 10.4.208.30/31 | 10.4.208.30 – 10.4.208.31 | 10.4.208.31 |
| 17 | 10.4.208.32/31 | 10.4.208.32 – 10.4.208.33 | 10.4.208.33 |
| 18 | 10.4.208.34/31 | 10.4.208.34 – 10.4.208.35 | 10.4.208.35 |
| 19 | 10.4.208.36/31 | 10.4.208.36 – 10.4.208.37 | 10.4.208.37 |
| 20 | 10.4.208.38/31 | 10.4.208.38 – 10.4.208.39 | 10.4.208.39 |
| 21 | 10.4.208.40/31 | 10.4.208.40 – 10.4.208.41 | 10.4.208.41 |
| 22 | 10.4.208.42/31 | 10.4.208.42 – 10.4.208.43 | 10.4.208.43 |
| 23 | 10.4.208.44/31 | 10.4.208.44 – 10.4.208.45 | 10.4.208.45 |
| 24 | 10.4.208.46/31 | 10.4.208.46 – 10.4.208.47 | 10.4.208.47 |
| 25 | 10.4.208.48/31 | 10.4.208.48 – 10.4.208.49 | 10.4.208.49 |
| 26 | 10.4.208.50/31 | 10.4.208.50 – 10.4.208.51 | 10.4.208.51 |
| 27 | 10.4.208.52/31 | 10.4.208.52 – 10.4.208.53 | 10.4.208.53 |
| 28 | 10.4.208.54/31 | 10.4.208.54 – 10.4.208.55 | 10.4.208.55 |
| 29 | 10.4.208.56/31 | 10.4.208.56 – 10.4.208.57 | 10.4.208.57 |
| 30 | 10.4.208.58/31 | 10.4.208.58 – 10.4.208.59 | 10.4.208.59 |
| 31 | 10.4.208.60/31 | 10.4.208.60 – 10.4.208.61 | 10.4.208.61 |
| 32 | 10.4.208.62/31 | 10.4.208.62 – 10.4.208.63 | 10.4.208.63 |
| 33 | 10.4.208.64/31 | 10.4.208.64 – 10.4.208.65 | 10.4.208.65 |
| 34 | 10.4.208.66/31 | 10.4.208.66 – 10.4.208.67 | 10.4.208.67 |
| 35 | 10.4.208.68/31 | 10.4.208.68 – 10.4.208.69 | 10.4.208.69 |
| 36 | 10.4.208.70/31 | 10.4.208.70 – 10.4.208.71 | 10.4.208.71 |
| 37 | 10.4.208.72/31 | 10.4.208.72 – 10.4.208.73 | 10.4.208.73 |
| 38 | 10.4.208.74/31 | 10.4.208.74 – 10.4.208.75 | 10.4.208.75 |
| 39 | 10.4.208.76/31 | 10.4.208.76 – 10.4.208.77 | 10.4.208.77 |
| 40 | 10.4.208.78/31 | 10.4.208.78 – 10.4.208.79 | 10.4.208.79 |
| 41 | 10.4.208.80/31 | 10.4.208.80 – 10.4.208.81 | 10.4.208.81 |
| 42 | 10.4.208.82/31 | 10.4.208.82 – 10.4.208.83 | 10.4.208.83 |
| 43 | 10.4.208.84/31 | 10.4.208.84 – 10.4.208.85 | 10.4.208.85 |
| 44 | 10.4.208.86/31 | 10.4.208.86 – 10.4.208.87 | 10.4.208.87 |
| 45 | 10.4.208.88/31 | 10.4.208.88 – 10.4.208.89 | 10.4.208.89 |
| 46 | 10.4.208.90/31 | 10.4.208.90 – 10.4.208.91 | 10.4.208.91 |
| 47 | 10.4.208.92/31 | 10.4.208.92 – 10.4.208.93 | 10.4.208.93 |
| 48 | 10.4.208.94/31 | 10.4.208.94 – 10.4.208.95 | 10.4.208.95 |
| 49 | 10.4.208.96/31 | 10.4.208.96 – 10.4.208.97 | 10.4.208.97 |
| 50 | 10.4.208.98/31 | 10.4.208.98 – 10.4.208.99 | 10.4.208.99 |
| 51 | 10.4.208.100/31 | 10.4.208.100 – 10.4.208.101 | 10.4.208.101 |
| 52 | 10.4.208.102/31 | 10.4.208.102 – 10.4.208.103 | 10.4.208.103 |
| 53 | 10.4.208.104/31 | 10.4.208.104 – 10.4.208.105 | 10.4.208.105 |
| 54 | 10.4.208.106/31 | 10.4.208.106 – 10.4.208.107 | 10.4.208.107 |
| 55 | 10.4.208.108/31 | 10.4.208.108 – 10.4.208.109 | 10.4.208.109 |
| 56 | 10.4.208.110/31 | 10.4.208.110 – 10.4.208.111 | 10.4.208.111 |
| 57 | 10.4.208.112/31 | 10.4.208.112 – 10.4.208.113 | 10.4.208.113 |
| 58 | 10.4.208.114/31 | 10.4.208.114 – 10.4.208.115 | 10.4.208.115 |
| 59 | 10.4.208.116/31 | 10.4.208.116 – 10.4.208.117 | 10.4.208.117 |
| 60 | 10.4.208.118/31 | 10.4.208.118 – 10.4.208.119 | 10.4.208.119 |
| 61 | 10.4.208.120/31 | 10.4.208.120 – 10.4.208.121 | 10.4.208.121 |
| 62 | 10.4.208.122/31 | 10.4.208.122 – 10.4.208.123 | 10.4.208.123 |
| 63 | 10.4.208.124/31 | 10.4.208.124 – 10.4.208.125 | 10.4.208.125 |
| 64 | 10.4.208.126/31 | 10.4.208.126 – 10.4.208.127 | 10.4.208.127 |
| 65 | 10.4.208.128/31 | 10.4.208.128 – 10.4.208.129 | 10.4.208.129 |
| 66 | 10.4.208.130/31 | 10.4.208.130 – 10.4.208.131 | 10.4.208.131 |
| 67 | 10.4.208.132/31 | 10.4.208.132 – 10.4.208.133 | 10.4.208.133 |
| 68 | 10.4.208.134/31 | 10.4.208.134 – 10.4.208.135 | 10.4.208.135 |
| 69 | 10.4.208.136/31 | 10.4.208.136 – 10.4.208.137 | 10.4.208.137 |
| 70 | 10.4.208.138/31 | 10.4.208.138 – 10.4.208.139 | 10.4.208.139 |
| 71 | 10.4.208.140/31 | 10.4.208.140 – 10.4.208.141 | 10.4.208.141 |
| 72 | 10.4.208.142/31 | 10.4.208.142 – 10.4.208.143 | 10.4.208.143 |
| 73 | 10.4.208.144/31 | 10.4.208.144 – 10.4.208.145 | 10.4.208.145 |
| 74 | 10.4.208.146/31 | 10.4.208.146 – 10.4.208.147 | 10.4.208.147 |
| 75 | 10.4.208.148/31 | 10.4.208.148 – 10.4.208.149 | 10.4.208.149 |
| 76 | 10.4.208.150/31 | 10.4.208.150 – 10.4.208.151 | 10.4.208.151 |
| 77 | 10.4.208.152/31 | 10.4.208.152 – 10.4.208.153 | 10.4.208.153 |
| 78 | 10.4.208.154/31 | 10.4.208.154 – 10.4.208.155 | 10.4.208.155 |
| 79 | 10.4.208.156/31 | 10.4.208.156 – 10.4.208.157 | 10.4.208.157 |
| 80 | 10.4.208.158/31 | 10.4.208.158 – 10.4.208.159 | 10.4.208.159 |
| 81 | 10.4.208.160/31 | 10.4.208.160 – 10.4.208.161 | 10.4.208.161 |
| 82 | 10.4.208.162/31 | 10.4.208.162 – 10.4.208.163 | 10.4.208.163 |
| 83 | 10.4.208.164/31 | 10.4.208.164 – 10.4.208.165 | 10.4.208.165 |
| 84 | 10.4.208.166/31 | 10.4.208.166 – 10.4.208.167 | 10.4.208.167 |
| 85 | 10.4.208.168/31 | 10.4.208.168 – 10.4.208.169 | 10.4.208.169 |
| 86 | 10.4.208.170/31 | 10.4.208.170 – 10.4.208.171 | 10.4.208.171 |
| 87 | 10.4.208.172/31 | 10.4.208.172 – 10.4.208.173 | 10.4.208.173 |
| 88 | 10.4.208.174/31 | 10.4.208.174 – 10.4.208.175 | 10.4.208.175 |
| 89 | 10.4.208.176/31 | 10.4.208.176 – 10.4.208.177 | 10.4.208.177 |
| 90 | 10.4.208.178/31 | 10.4.208.178 – 10.4.208.179 | 10.4.208.179 |
| 91 | 10.4.208.180/31 | 10.4.208.180 – 10.4.208.181 | 10.4.208.181 |
| 92 | 10.4.208.182/31 | 10.4.208.182 – 10.4.208.183 | 10.4.208.183 |
| 93 | 10.4.208.184/31 | 10.4.208.184 – 10.4.208.185 | 10.4.208.185 |
| 94 | 10.4.208.186/31 | 10.4.208.186 – 10.4.208.187 | 10.4.208.187 |
| 95 | 10.4.208.188/31 | 10.4.208.188 – 10.4.208.189 | 10.4.208.189 |
| 96 | 10.4.208.190/31 | 10.4.208.190 – 10.4.208.191 | 10.4.208.191 |
| 97 | 10.4.208.192/31 | 10.4.208.192 – 10.4.208.193 | 10.4.208.193 |
| 98 | 10.4.208.194/31 | 10.4.208.194 – 10.4.208.195 | 10.4.208.195 |
| 99 | 10.4.208.196/31 | 10.4.208.196 – 10.4.208.197 | 10.4.208.197 |
| 100 | 10.4.208.198/31 | 10.4.208.198 – 10.4.208.199 | 10.4.208.199 |
| 101 | 10.4.208.200/31 | 10.4.208.200 – 10.4.208.201 | 10.4.208.201 |
| 102 | 10.4.208.202/31 | 10.4.208.202 – 10.4.208.203 | 10.4.208.203 |
| 103 | 10.4.208.204/31 | 10.4.208.204 – 10.4.208.205 | 10.4.208.205 |
| 104 | 10.4.208.206/31 | 10.4.208.206 – 10.4.208.207 | 10.4.208.207 |
| 105 | 10.4.208.208/31 | 10.4.208.208 – 10.4.208.209 | 10.4.208.209 |
| 106 | 10.4.208.210/31 | 10.4.208.210 – 10.4.208.211 | 10.4.208.211 |
| 107 | 10.4.208.212/31 | 10.4.208.212 – 10.4.208.213 | 10.4.208.213 |
| 108 | 10.4.208.214/31 | 10.4.208.214 – 10.4.208.215 | 10.4.208.215 |
| 109 | 10.4.208.216/31 | 10.4.208.216 – 10.4.208.217 | 10.4.208.217 |
| 110 | 10.4.208.218/31 | 10.4.208.218 – 10.4.208.219 | 10.4.208.219 |
| 111 | 10.4.208.220/31 | 10.4.208.220 – 10.4.208.221 | 10.4.208.221 |
| 112 | 10.4.208.222/31 | 10.4.208.222 – 10.4.208.223 | 10.4.208.223 |
| 113 | 10.4.208.224/31 | 10.4.208.224 – 10.4.208.225 | 10.4.208.225 |
| 114 | 10.4.208.226/31 | 10.4.208.226 – 10.4.208.227 | 10.4.208.227 |
| 115 | 10.4.208.228/31 | 10.4.208.228 – 10.4.208.229 | 10.4.208.229 |
| 116 | 10.4.208.230/31 | 10.4.208.230 – 10.4.208.231 | 10.4.208.231 |
| 117 | 10.4.208.232/31 | 10.4.208.232 – 10.4.208.233 | 10.4.208.233 |
| 118 | 10.4.208.234/31 | 10.4.208.234 – 10.4.208.235 | 10.4.208.235 |
| 119 | 10.4.208.236/31 | 10.4.208.236 – 10.4.208.237 | 10.4.208.237 |
| 120 | 10.4.208.238/31 | 10.4.208.238 – 10.4.208.239 | 10.4.208.239 |
| 121 | 10.4.208.240/31 | 10.4.208.240 – 10.4.208.241 | 10.4.208.241 |
| 122 | 10.4.208.242/31 | 10.4.208.242 – 10.4.208.243 | 10.4.208.243 |
| 123 | 10.4.208.244/31 | 10.4.208.244 – 10.4.208.245 | 10.4.208.245 |
| 124 | 10.4.208.246/31 | 10.4.208.246 – 10.4.208.247 | 10.4.208.247 |
| 125 | 10.4.208.248/31 | 10.4.208.248 – 10.4.208.249 | 10.4.208.249 |
| 126 | 10.4.208.250/31 | 10.4.208.250 – 10.4.208.251 | 10.4.208.251 |
| 127 | 10.4.208.252/31 | 10.4.208.252 – 10.4.208.253 | 10.4.208.253 |
| 128 | 10.4.208.254/31 | 10.4.208.254 – 10.4.208.255 | 10.4.208.255 |
| 129 | 10.4.209.0/31 | 10.4.209.0 – 10.4.209.1 | 10.4.209.1 |
| 130 | 10.4.209.2/31 | 10.4.209.2 – 10.4.209.3 | 10.4.209.3 |
| 131 | 10.4.209.4/31 | 10.4.209.4 – 10.4.209.5 | 10.4.209.5 |
| 132 | 10.4.209.6/31 | 10.4.209.6 – 10.4.209.7 | 10.4.209.7 |
| 133 | 10.4.209.8/31 | 10.4.209.8 – 10.4.209.9 | 10.4.209.9 |
| 134 | 10.4.209.10/31 | 10.4.209.10 – 10.4.209.11 | 10.4.209.11 |
| 135 | 10.4.209.12/31 | 10.4.209.12 – 10.4.209.13 | 10.4.209.13 |
| 136 | 10.4.209.14/31 | 10.4.209.14 – 10.4.209.15 | 10.4.209.15 |
| 137 | 10.4.209.16/31 | 10.4.209.16 – 10.4.209.17 | 10.4.209.17 |
| 138 | 10.4.209.18/31 | 10.4.209.18 – 10.4.209.19 | 10.4.209.19 |
| 139 | 10.4.209.20/31 | 10.4.209.20 – 10.4.209.21 | 10.4.209.21 |
| 140 | 10.4.209.22/31 | 10.4.209.22 – 10.4.209.23 | 10.4.209.23 |
| 141 | 10.4.209.24/31 | 10.4.209.24 – 10.4.209.25 | 10.4.209.25 |
| 142 | 10.4.209.26/31 | 10.4.209.26 – 10.4.209.27 | 10.4.209.27 |
| 143 | 10.4.209.28/31 | 10.4.209.28 – 10.4.209.29 | 10.4.209.29 |
| 144 | 10.4.209.30/31 | 10.4.209.30 – 10.4.209.31 | 10.4.209.31 |
| 145 | 10.4.209.32/31 | 10.4.209.32 – 10.4.209.33 | 10.4.209.33 |
| 146 | 10.4.209.34/31 | 10.4.209.34 – 10.4.209.35 | 10.4.209.35 |
| 147 | 10.4.209.36/31 | 10.4.209.36 – 10.4.209.37 | 10.4.209.37 |
| 148 | 10.4.209.38/31 | 10.4.209.38 – 10.4.209.39 | 10.4.209.39 |
| 149 | 10.4.209.40/31 | 10.4.209.40 – 10.4.209.41 | 10.4.209.41 |
| 150 | 10.4.209.42/31 | 10.4.209.42 – 10.4.209.43 | 10.4.209.43 |
| 151 | 10.4.209.44/31 | 10.4.209.44 – 10.4.209.45 | 10.4.209.45 |
| 152 | 10.4.209.46/31 | 10.4.209.46 – 10.4.209.47 | 10.4.209.47 |
| 153 | 10.4.209.48/31 | 10.4.209.48 – 10.4.209.49 | 10.4.209.49 |
| 154 | 10.4.209.50/31 | 10.4.209.50 – 10.4.209.51 | 10.4.209.51 |
| 155 | 10.4.209.52/31 | 10.4.209.52 – 10.4.209.53 | 10.4.209.53 |
| 156 | 10.4.209.54/31 | 10.4.209.54 – 10.4.209.55 | 10.4.209.55 |
| 157 | 10.4.209.56/31 | 10.4.209.56 – 10.4.209.57 | 10.4.209.57 |
| 158 | 10.4.209.58/31 | 10.4.209.58 – 10.4.209.59 | 10.4.209.59 |
| 159 | 10.4.209.60/31 | 10.4.209.60 – 10.4.209.61 | 10.4.209.61 |
| 160 | 10.4.209.62/31 | 10.4.209.62 – 10.4.209.63 | 10.4.209.63 |
| 161 | 10.4.209.64/31 | 10.4.209.64 – 10.4.209.65 | 10.4.209.65 |
| 162 | 10.4.209.66/31 | 10.4.209.66 – 10.4.209.67 | 10.4.209.67 |
| 163 | 10.4.209.68/31 | 10.4.209.68 – 10.4.209.69 | 10.4.209.69 |
| 164 | 10.4.209.70/31 | 10.4.209.70 – 10.4.209.71 | 10.4.209.71 |
| 165 | 10.4.209.72/31 | 10.4.209.72 – 10.4.209.73 | 10.4.209.73 |
| 166 | 10.4.209.74/31 | 10.4.209.74 – 10.4.209.75 | 10.4.209.75 |
| 167 | 10.4.209.76/31 | 10.4.209.76 – 10.4.209.77 | 10.4.209.77 |
| 168 | 10.4.209.78/31 | 10.4.209.78 – 10.4.209.79 | 10.4.209.79 |
| 169 | 10.4.209.80/31 | 10.4.209.80 – 10.4.209.81 | 10.4.209.81 |
| 170 | 10.4.209.82/31 | 10.4.209.82 – 10.4.209.83 | 10.4.209.83 |
| 171 | 10.4.209.84/31 | 10.4.209.84 – 10.4.209.85 | 10.4.209.85 |
| 172 | 10.4.209.86/31 | 10.4.209.86 – 10.4.209.87 | 10.4.209.87 |
| 173 | 10.4.209.88/31 | 10.4.209.88 – 10.4.209.89 | 10.4.209.89 |
| 174 | 10.4.209.90/31 | 10.4.209.90 – 10.4.209.91 | 10.4.209.91 |
| 175 | 10.4.209.92/31 | 10.4.209.92 – 10.4.209.93 | 10.4.209.93 |
| 176 | 10.4.209.94/31 | 10.4.209.94 – 10.4.209.95 | 10.4.209.95 |
| 177 | 10.4.209.96/31 | 10.4.209.96 – 10.4.209.97 | 10.4.209.97 |
| 178 | 10.4.209.98/31 | 10.4.209.98 – 10.4.209.99 | 10.4.209.99 |
| 179 | 10.4.209.100/31 | 10.4.209.100 – 10.4.209.101 | 10.4.209.101 |
| 180 | 10.4.209.102/31 | 10.4.209.102 – 10.4.209.103 | 10.4.209.103 |
| 181 | 10.4.209.104/31 | 10.4.209.104 – 10.4.209.105 | 10.4.209.105 |
| 182 | 10.4.209.106/31 | 10.4.209.106 – 10.4.209.107 | 10.4.209.107 |
| 183 | 10.4.209.108/31 | 10.4.209.108 – 10.4.209.109 | 10.4.209.109 |
| 184 | 10.4.209.110/31 | 10.4.209.110 – 10.4.209.111 | 10.4.209.111 |
| 185 | 10.4.209.112/31 | 10.4.209.112 – 10.4.209.113 | 10.4.209.113 |
| 186 | 10.4.209.114/31 | 10.4.209.114 – 10.4.209.115 | 10.4.209.115 |
| 187 | 10.4.209.116/31 | 10.4.209.116 – 10.4.209.117 | 10.4.209.117 |
| 188 | 10.4.209.118/31 | 10.4.209.118 – 10.4.209.119 | 10.4.209.119 |
| 189 | 10.4.209.120/31 | 10.4.209.120 – 10.4.209.121 | 10.4.209.121 |
| 190 | 10.4.209.122/31 | 10.4.209.122 – 10.4.209.123 | 10.4.209.123 |
| 191 | 10.4.209.124/31 | 10.4.209.124 – 10.4.209.125 | 10.4.209.125 |
| 192 | 10.4.209.126/31 | 10.4.209.126 – 10.4.209.127 | 10.4.209.127 |
| 193 | 10.4.209.128/31 | 10.4.209.128 – 10.4.209.129 | 10.4.209.129 |
| 194 | 10.4.209.130/31 | 10.4.209.130 – 10.4.209.131 | 10.4.209.131 |
| 195 | 10.4.209.132/31 | 10.4.209.132 – 10.4.209.133 | 10.4.209.133 |
| 196 | 10.4.209.134/31 | 10.4.209.134 – 10.4.209.135 | 10.4.209.135 |
| 197 | 10.4.209.136/31 | 10.4.209.136 – 10.4.209.137 | 10.4.209.137 |
| 198 | 10.4.209.138/31 | 10.4.209.138 – 10.4.209.139 | 10.4.209.139 |
| 199 | 10.4.209.140/31 | 10.4.209.140 – 10.4.209.141 | 10.4.209.141 |
| 200 | 10.4.209.142/31 | 10.4.209.142 – 10.4.209.143 | 10.4.209.143 |
| 201 | 10.4.209.144/31 | 10.4.209.144 – 10.4.209.145 | 10.4.209.145 |
| 202 | 10.4.209.146/31 | 10.4.209.146 – 10.4.209.147 | 10.4.209.147 |
| 203 | 10.4.209.148/31 | 10.4.209.148 – 10.4.209.149 | 10.4.209.149 |
| 204 | 10.4.209.150/31 | 10.4.209.150 – 10.4.209.151 | 10.4.209.151 |
| 205 | 10.4.209.152/31 | 10.4.209.152 – 10.4.209.153 | 10.4.209.153 |
| 206 | 10.4.209.154/31 | 10.4.209.154 – 10.4.209.155 | 10.4.209.155 |
| 207 | 10.4.209.156/31 | 10.4.209.156 – 10.4.209.157 | 10.4.209.157 |
| 208 | 10.4.209.158/31 | 10.4.209.158 – 10.4.209.159 | 10.4.209.159 |
| 209 | 10.4.209.160/31 | 10.4.209.160 – 10.4.209.161 | 10.4.209.161 |
| 210 | 10.4.209.162/31 | 10.4.209.162 – 10.4.209.163 | 10.4.209.163 |
| 211 | 10.4.209.164/31 | 10.4.209.164 – 10.4.209.165 | 10.4.209.165 |
| 212 | 10.4.209.166/31 | 10.4.209.166 – 10.4.209.167 | 10.4.209.167 |
| 213 | 10.4.209.168/31 | 10.4.209.168 – 10.4.209.169 | 10.4.209.169 |
| 214 | 10.4.209.170/31 | 10.4.209.170 – 10.4.209.171 | 10.4.209.171 |
| 215 | 10.4.209.172/31 | 10.4.209.172 – 10.4.209.173 | 10.4.209.173 |
| 216 | 10.4.209.174/31 | 10.4.209.174 – 10.4.209.175 | 10.4.209.175 |
| 217 | 10.4.209.176/31 | 10.4.209.176 – 10.4.209.177 | 10.4.209.177 |
| 218 | 10.4.209.178/31 | 10.4.209.178 – 10.4.209.179 | 10.4.209.179 |
| 219 | 10.4.209.180/31 | 10.4.209.180 – 10.4.209.181 | 10.4.209.181 |
| 220 | 10.4.209.182/31 | 10.4.209.182 – 10.4.209.183 | 10.4.209.183 |
| 221 | 10.4.209.184/31 | 10.4.209.184 – 10.4.209.185 | 10.4.209.185 |
| 222 | 10.4.209.186/31 | 10.4.209.186 – 10.4.209.187 | 10.4.209.187 |
| 223 | 10.4.209.188/31 | 10.4.209.188 – 10.4.209.189 | 10.4.209.189 |
| 224 | 10.4.209.190/31 | 10.4.209.190 – 10.4.209.191 | 10.4.209.191 |
| 225 | 10.4.209.192/31 | 10.4.209.192 – 10.4.209.193 | 10.4.209.193 |
| 226 | 10.4.209.194/31 | 10.4.209.194 – 10.4.209.195 | 10.4.209.195 |
| 227 | 10.4.209.196/31 | 10.4.209.196 – 10.4.209.197 | 10.4.209.197 |
| 228 | 10.4.209.198/31 | 10.4.209.198 – 10.4.209.199 | 10.4.209.199 |
| 229 | 10.4.209.200/31 | 10.4.209.200 – 10.4.209.201 | 10.4.209.201 |
| 230 | 10.4.209.202/31 | 10.4.209.202 – 10.4.209.203 | 10.4.209.203 |
| 231 | 10.4.209.204/31 | 10.4.209.204 – 10.4.209.205 | 10.4.209.205 |
| 232 | 10.4.209.206/31 | 10.4.209.206 – 10.4.209.207 | 10.4.209.207 |
| 233 | 10.4.209.208/31 | 10.4.209.208 – 10.4.209.209 | 10.4.209.209 |
| 234 | 10.4.209.210/31 | 10.4.209.210 – 10.4.209.211 | 10.4.209.211 |
| 235 | 10.4.209.212/31 | 10.4.209.212 – 10.4.209.213 | 10.4.209.213 |
| 236 | 10.4.209.214/31 | 10.4.209.214 – 10.4.209.215 | 10.4.209.215 |
| 237 | 10.4.209.216/31 | 10.4.209.216 – 10.4.209.217 | 10.4.209.217 |
| 238 | 10.4.209.218/31 | 10.4.209.218 – 10.4.209.219 | 10.4.209.219 |
| 239 | 10.4.209.220/31 | 10.4.209.220 – 10.4.209.221 | 10.4.209.221 |
| 240 | 10.4.209.222/31 | 10.4.209.222 – 10.4.209.223 | 10.4.209.223 |
| 241 | 10.4.209.224/31 | 10.4.209.224 – 10.4.209.225 | 10.4.209.225 |
| 242 | 10.4.209.226/31 | 10.4.209.226 – 10.4.209.227 | 10.4.209.227 |
| 243 | 10.4.209.228/31 | 10.4.209.228 – 10.4.209.229 | 10.4.209.229 |
| 244 | 10.4.209.230/31 | 10.4.209.230 – 10.4.209.231 | 10.4.209.231 |
| 245 | 10.4.209.232/31 | 10.4.209.232 – 10.4.209.233 | 10.4.209.233 |
| 246 | 10.4.209.234/31 | 10.4.209.234 – 10.4.209.235 | 10.4.209.235 |
| 247 | 10.4.209.236/31 | 10.4.209.236 – 10.4.209.237 | 10.4.209.237 |
| 248 | 10.4.209.238/31 | 10.4.209.238 – 10.4.209.239 | 10.4.209.239 |
| 249 | 10.4.209.240/31 | 10.4.209.240 – 10.4.209.241 | 10.4.209.241 |
| 250 | 10.4.209.242/31 | 10.4.209.242 – 10.4.209.243 | 10.4.209.243 |
| 251 | 10.4.209.244/31 | 10.4.209.244 – 10.4.209.245 | 10.4.209.245 |
| 252 | 10.4.209.246/31 | 10.4.209.246 – 10.4.209.247 | 10.4.209.247 |
| 253 | 10.4.209.248/31 | 10.4.209.248 – 10.4.209.249 | 10.4.209.249 |
| 254 | 10.4.209.250/31 | 10.4.209.250 – 10.4.209.251 | 10.4.209.251 |
| 255 | 10.4.209.252/31 | 10.4.209.252 – 10.4.209.253 | 10.4.209.253 |
| 256 | 10.4.209.254/31 | 10.4.209.254 – 10.4.209.255 | 10.4.209.255 |
showing 256 of 1,024
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.