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)10.4.216.0/21
network10.4.216.0/21
broadcast10.4.223.255
first host10.4.216.1
last host10.4.223.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.4.216.0/21
address00001010.00000100.11011000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000100.11011000.00000000
broadcast00001010.00000100.11011111.11111111
green = network part, grey = host part
hex0x0a04d800
decimal168089600
reverse dns0.216.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:d800
/21 split into /31 · 1,024 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.4.216.0/31 | 10.4.216.0 – 10.4.216.1 | 10.4.216.1 |
| 2 | 10.4.216.2/31 | 10.4.216.2 – 10.4.216.3 | 10.4.216.3 |
| 3 | 10.4.216.4/31 | 10.4.216.4 – 10.4.216.5 | 10.4.216.5 |
| 4 | 10.4.216.6/31 | 10.4.216.6 – 10.4.216.7 | 10.4.216.7 |
| 5 | 10.4.216.8/31 | 10.4.216.8 – 10.4.216.9 | 10.4.216.9 |
| 6 | 10.4.216.10/31 | 10.4.216.10 – 10.4.216.11 | 10.4.216.11 |
| 7 | 10.4.216.12/31 | 10.4.216.12 – 10.4.216.13 | 10.4.216.13 |
| 8 | 10.4.216.14/31 | 10.4.216.14 – 10.4.216.15 | 10.4.216.15 |
| 9 | 10.4.216.16/31 | 10.4.216.16 – 10.4.216.17 | 10.4.216.17 |
| 10 | 10.4.216.18/31 | 10.4.216.18 – 10.4.216.19 | 10.4.216.19 |
| 11 | 10.4.216.20/31 | 10.4.216.20 – 10.4.216.21 | 10.4.216.21 |
| 12 | 10.4.216.22/31 | 10.4.216.22 – 10.4.216.23 | 10.4.216.23 |
| 13 | 10.4.216.24/31 | 10.4.216.24 – 10.4.216.25 | 10.4.216.25 |
| 14 | 10.4.216.26/31 | 10.4.216.26 – 10.4.216.27 | 10.4.216.27 |
| 15 | 10.4.216.28/31 | 10.4.216.28 – 10.4.216.29 | 10.4.216.29 |
| 16 | 10.4.216.30/31 | 10.4.216.30 – 10.4.216.31 | 10.4.216.31 |
| 17 | 10.4.216.32/31 | 10.4.216.32 – 10.4.216.33 | 10.4.216.33 |
| 18 | 10.4.216.34/31 | 10.4.216.34 – 10.4.216.35 | 10.4.216.35 |
| 19 | 10.4.216.36/31 | 10.4.216.36 – 10.4.216.37 | 10.4.216.37 |
| 20 | 10.4.216.38/31 | 10.4.216.38 – 10.4.216.39 | 10.4.216.39 |
| 21 | 10.4.216.40/31 | 10.4.216.40 – 10.4.216.41 | 10.4.216.41 |
| 22 | 10.4.216.42/31 | 10.4.216.42 – 10.4.216.43 | 10.4.216.43 |
| 23 | 10.4.216.44/31 | 10.4.216.44 – 10.4.216.45 | 10.4.216.45 |
| 24 | 10.4.216.46/31 | 10.4.216.46 – 10.4.216.47 | 10.4.216.47 |
| 25 | 10.4.216.48/31 | 10.4.216.48 – 10.4.216.49 | 10.4.216.49 |
| 26 | 10.4.216.50/31 | 10.4.216.50 – 10.4.216.51 | 10.4.216.51 |
| 27 | 10.4.216.52/31 | 10.4.216.52 – 10.4.216.53 | 10.4.216.53 |
| 28 | 10.4.216.54/31 | 10.4.216.54 – 10.4.216.55 | 10.4.216.55 |
| 29 | 10.4.216.56/31 | 10.4.216.56 – 10.4.216.57 | 10.4.216.57 |
| 30 | 10.4.216.58/31 | 10.4.216.58 – 10.4.216.59 | 10.4.216.59 |
| 31 | 10.4.216.60/31 | 10.4.216.60 – 10.4.216.61 | 10.4.216.61 |
| 32 | 10.4.216.62/31 | 10.4.216.62 – 10.4.216.63 | 10.4.216.63 |
| 33 | 10.4.216.64/31 | 10.4.216.64 – 10.4.216.65 | 10.4.216.65 |
| 34 | 10.4.216.66/31 | 10.4.216.66 – 10.4.216.67 | 10.4.216.67 |
| 35 | 10.4.216.68/31 | 10.4.216.68 – 10.4.216.69 | 10.4.216.69 |
| 36 | 10.4.216.70/31 | 10.4.216.70 – 10.4.216.71 | 10.4.216.71 |
| 37 | 10.4.216.72/31 | 10.4.216.72 – 10.4.216.73 | 10.4.216.73 |
| 38 | 10.4.216.74/31 | 10.4.216.74 – 10.4.216.75 | 10.4.216.75 |
| 39 | 10.4.216.76/31 | 10.4.216.76 – 10.4.216.77 | 10.4.216.77 |
| 40 | 10.4.216.78/31 | 10.4.216.78 – 10.4.216.79 | 10.4.216.79 |
| 41 | 10.4.216.80/31 | 10.4.216.80 – 10.4.216.81 | 10.4.216.81 |
| 42 | 10.4.216.82/31 | 10.4.216.82 – 10.4.216.83 | 10.4.216.83 |
| 43 | 10.4.216.84/31 | 10.4.216.84 – 10.4.216.85 | 10.4.216.85 |
| 44 | 10.4.216.86/31 | 10.4.216.86 – 10.4.216.87 | 10.4.216.87 |
| 45 | 10.4.216.88/31 | 10.4.216.88 – 10.4.216.89 | 10.4.216.89 |
| 46 | 10.4.216.90/31 | 10.4.216.90 – 10.4.216.91 | 10.4.216.91 |
| 47 | 10.4.216.92/31 | 10.4.216.92 – 10.4.216.93 | 10.4.216.93 |
| 48 | 10.4.216.94/31 | 10.4.216.94 – 10.4.216.95 | 10.4.216.95 |
| 49 | 10.4.216.96/31 | 10.4.216.96 – 10.4.216.97 | 10.4.216.97 |
| 50 | 10.4.216.98/31 | 10.4.216.98 – 10.4.216.99 | 10.4.216.99 |
| 51 | 10.4.216.100/31 | 10.4.216.100 – 10.4.216.101 | 10.4.216.101 |
| 52 | 10.4.216.102/31 | 10.4.216.102 – 10.4.216.103 | 10.4.216.103 |
| 53 | 10.4.216.104/31 | 10.4.216.104 – 10.4.216.105 | 10.4.216.105 |
| 54 | 10.4.216.106/31 | 10.4.216.106 – 10.4.216.107 | 10.4.216.107 |
| 55 | 10.4.216.108/31 | 10.4.216.108 – 10.4.216.109 | 10.4.216.109 |
| 56 | 10.4.216.110/31 | 10.4.216.110 – 10.4.216.111 | 10.4.216.111 |
| 57 | 10.4.216.112/31 | 10.4.216.112 – 10.4.216.113 | 10.4.216.113 |
| 58 | 10.4.216.114/31 | 10.4.216.114 – 10.4.216.115 | 10.4.216.115 |
| 59 | 10.4.216.116/31 | 10.4.216.116 – 10.4.216.117 | 10.4.216.117 |
| 60 | 10.4.216.118/31 | 10.4.216.118 – 10.4.216.119 | 10.4.216.119 |
| 61 | 10.4.216.120/31 | 10.4.216.120 – 10.4.216.121 | 10.4.216.121 |
| 62 | 10.4.216.122/31 | 10.4.216.122 – 10.4.216.123 | 10.4.216.123 |
| 63 | 10.4.216.124/31 | 10.4.216.124 – 10.4.216.125 | 10.4.216.125 |
| 64 | 10.4.216.126/31 | 10.4.216.126 – 10.4.216.127 | 10.4.216.127 |
| 65 | 10.4.216.128/31 | 10.4.216.128 – 10.4.216.129 | 10.4.216.129 |
| 66 | 10.4.216.130/31 | 10.4.216.130 – 10.4.216.131 | 10.4.216.131 |
| 67 | 10.4.216.132/31 | 10.4.216.132 – 10.4.216.133 | 10.4.216.133 |
| 68 | 10.4.216.134/31 | 10.4.216.134 – 10.4.216.135 | 10.4.216.135 |
| 69 | 10.4.216.136/31 | 10.4.216.136 – 10.4.216.137 | 10.4.216.137 |
| 70 | 10.4.216.138/31 | 10.4.216.138 – 10.4.216.139 | 10.4.216.139 |
| 71 | 10.4.216.140/31 | 10.4.216.140 – 10.4.216.141 | 10.4.216.141 |
| 72 | 10.4.216.142/31 | 10.4.216.142 – 10.4.216.143 | 10.4.216.143 |
| 73 | 10.4.216.144/31 | 10.4.216.144 – 10.4.216.145 | 10.4.216.145 |
| 74 | 10.4.216.146/31 | 10.4.216.146 – 10.4.216.147 | 10.4.216.147 |
| 75 | 10.4.216.148/31 | 10.4.216.148 – 10.4.216.149 | 10.4.216.149 |
| 76 | 10.4.216.150/31 | 10.4.216.150 – 10.4.216.151 | 10.4.216.151 |
| 77 | 10.4.216.152/31 | 10.4.216.152 – 10.4.216.153 | 10.4.216.153 |
| 78 | 10.4.216.154/31 | 10.4.216.154 – 10.4.216.155 | 10.4.216.155 |
| 79 | 10.4.216.156/31 | 10.4.216.156 – 10.4.216.157 | 10.4.216.157 |
| 80 | 10.4.216.158/31 | 10.4.216.158 – 10.4.216.159 | 10.4.216.159 |
| 81 | 10.4.216.160/31 | 10.4.216.160 – 10.4.216.161 | 10.4.216.161 |
| 82 | 10.4.216.162/31 | 10.4.216.162 – 10.4.216.163 | 10.4.216.163 |
| 83 | 10.4.216.164/31 | 10.4.216.164 – 10.4.216.165 | 10.4.216.165 |
| 84 | 10.4.216.166/31 | 10.4.216.166 – 10.4.216.167 | 10.4.216.167 |
| 85 | 10.4.216.168/31 | 10.4.216.168 – 10.4.216.169 | 10.4.216.169 |
| 86 | 10.4.216.170/31 | 10.4.216.170 – 10.4.216.171 | 10.4.216.171 |
| 87 | 10.4.216.172/31 | 10.4.216.172 – 10.4.216.173 | 10.4.216.173 |
| 88 | 10.4.216.174/31 | 10.4.216.174 – 10.4.216.175 | 10.4.216.175 |
| 89 | 10.4.216.176/31 | 10.4.216.176 – 10.4.216.177 | 10.4.216.177 |
| 90 | 10.4.216.178/31 | 10.4.216.178 – 10.4.216.179 | 10.4.216.179 |
| 91 | 10.4.216.180/31 | 10.4.216.180 – 10.4.216.181 | 10.4.216.181 |
| 92 | 10.4.216.182/31 | 10.4.216.182 – 10.4.216.183 | 10.4.216.183 |
| 93 | 10.4.216.184/31 | 10.4.216.184 – 10.4.216.185 | 10.4.216.185 |
| 94 | 10.4.216.186/31 | 10.4.216.186 – 10.4.216.187 | 10.4.216.187 |
| 95 | 10.4.216.188/31 | 10.4.216.188 – 10.4.216.189 | 10.4.216.189 |
| 96 | 10.4.216.190/31 | 10.4.216.190 – 10.4.216.191 | 10.4.216.191 |
| 97 | 10.4.216.192/31 | 10.4.216.192 – 10.4.216.193 | 10.4.216.193 |
| 98 | 10.4.216.194/31 | 10.4.216.194 – 10.4.216.195 | 10.4.216.195 |
| 99 | 10.4.216.196/31 | 10.4.216.196 – 10.4.216.197 | 10.4.216.197 |
| 100 | 10.4.216.198/31 | 10.4.216.198 – 10.4.216.199 | 10.4.216.199 |
| 101 | 10.4.216.200/31 | 10.4.216.200 – 10.4.216.201 | 10.4.216.201 |
| 102 | 10.4.216.202/31 | 10.4.216.202 – 10.4.216.203 | 10.4.216.203 |
| 103 | 10.4.216.204/31 | 10.4.216.204 – 10.4.216.205 | 10.4.216.205 |
| 104 | 10.4.216.206/31 | 10.4.216.206 – 10.4.216.207 | 10.4.216.207 |
| 105 | 10.4.216.208/31 | 10.4.216.208 – 10.4.216.209 | 10.4.216.209 |
| 106 | 10.4.216.210/31 | 10.4.216.210 – 10.4.216.211 | 10.4.216.211 |
| 107 | 10.4.216.212/31 | 10.4.216.212 – 10.4.216.213 | 10.4.216.213 |
| 108 | 10.4.216.214/31 | 10.4.216.214 – 10.4.216.215 | 10.4.216.215 |
| 109 | 10.4.216.216/31 | 10.4.216.216 – 10.4.216.217 | 10.4.216.217 |
| 110 | 10.4.216.218/31 | 10.4.216.218 – 10.4.216.219 | 10.4.216.219 |
| 111 | 10.4.216.220/31 | 10.4.216.220 – 10.4.216.221 | 10.4.216.221 |
| 112 | 10.4.216.222/31 | 10.4.216.222 – 10.4.216.223 | 10.4.216.223 |
| 113 | 10.4.216.224/31 | 10.4.216.224 – 10.4.216.225 | 10.4.216.225 |
| 114 | 10.4.216.226/31 | 10.4.216.226 – 10.4.216.227 | 10.4.216.227 |
| 115 | 10.4.216.228/31 | 10.4.216.228 – 10.4.216.229 | 10.4.216.229 |
| 116 | 10.4.216.230/31 | 10.4.216.230 – 10.4.216.231 | 10.4.216.231 |
| 117 | 10.4.216.232/31 | 10.4.216.232 – 10.4.216.233 | 10.4.216.233 |
| 118 | 10.4.216.234/31 | 10.4.216.234 – 10.4.216.235 | 10.4.216.235 |
| 119 | 10.4.216.236/31 | 10.4.216.236 – 10.4.216.237 | 10.4.216.237 |
| 120 | 10.4.216.238/31 | 10.4.216.238 – 10.4.216.239 | 10.4.216.239 |
| 121 | 10.4.216.240/31 | 10.4.216.240 – 10.4.216.241 | 10.4.216.241 |
| 122 | 10.4.216.242/31 | 10.4.216.242 – 10.4.216.243 | 10.4.216.243 |
| 123 | 10.4.216.244/31 | 10.4.216.244 – 10.4.216.245 | 10.4.216.245 |
| 124 | 10.4.216.246/31 | 10.4.216.246 – 10.4.216.247 | 10.4.216.247 |
| 125 | 10.4.216.248/31 | 10.4.216.248 – 10.4.216.249 | 10.4.216.249 |
| 126 | 10.4.216.250/31 | 10.4.216.250 – 10.4.216.251 | 10.4.216.251 |
| 127 | 10.4.216.252/31 | 10.4.216.252 – 10.4.216.253 | 10.4.216.253 |
| 128 | 10.4.216.254/31 | 10.4.216.254 – 10.4.216.255 | 10.4.216.255 |
| 129 | 10.4.217.0/31 | 10.4.217.0 – 10.4.217.1 | 10.4.217.1 |
| 130 | 10.4.217.2/31 | 10.4.217.2 – 10.4.217.3 | 10.4.217.3 |
| 131 | 10.4.217.4/31 | 10.4.217.4 – 10.4.217.5 | 10.4.217.5 |
| 132 | 10.4.217.6/31 | 10.4.217.6 – 10.4.217.7 | 10.4.217.7 |
| 133 | 10.4.217.8/31 | 10.4.217.8 – 10.4.217.9 | 10.4.217.9 |
| 134 | 10.4.217.10/31 | 10.4.217.10 – 10.4.217.11 | 10.4.217.11 |
| 135 | 10.4.217.12/31 | 10.4.217.12 – 10.4.217.13 | 10.4.217.13 |
| 136 | 10.4.217.14/31 | 10.4.217.14 – 10.4.217.15 | 10.4.217.15 |
| 137 | 10.4.217.16/31 | 10.4.217.16 – 10.4.217.17 | 10.4.217.17 |
| 138 | 10.4.217.18/31 | 10.4.217.18 – 10.4.217.19 | 10.4.217.19 |
| 139 | 10.4.217.20/31 | 10.4.217.20 – 10.4.217.21 | 10.4.217.21 |
| 140 | 10.4.217.22/31 | 10.4.217.22 – 10.4.217.23 | 10.4.217.23 |
| 141 | 10.4.217.24/31 | 10.4.217.24 – 10.4.217.25 | 10.4.217.25 |
| 142 | 10.4.217.26/31 | 10.4.217.26 – 10.4.217.27 | 10.4.217.27 |
| 143 | 10.4.217.28/31 | 10.4.217.28 – 10.4.217.29 | 10.4.217.29 |
| 144 | 10.4.217.30/31 | 10.4.217.30 – 10.4.217.31 | 10.4.217.31 |
| 145 | 10.4.217.32/31 | 10.4.217.32 – 10.4.217.33 | 10.4.217.33 |
| 146 | 10.4.217.34/31 | 10.4.217.34 – 10.4.217.35 | 10.4.217.35 |
| 147 | 10.4.217.36/31 | 10.4.217.36 – 10.4.217.37 | 10.4.217.37 |
| 148 | 10.4.217.38/31 | 10.4.217.38 – 10.4.217.39 | 10.4.217.39 |
| 149 | 10.4.217.40/31 | 10.4.217.40 – 10.4.217.41 | 10.4.217.41 |
| 150 | 10.4.217.42/31 | 10.4.217.42 – 10.4.217.43 | 10.4.217.43 |
| 151 | 10.4.217.44/31 | 10.4.217.44 – 10.4.217.45 | 10.4.217.45 |
| 152 | 10.4.217.46/31 | 10.4.217.46 – 10.4.217.47 | 10.4.217.47 |
| 153 | 10.4.217.48/31 | 10.4.217.48 – 10.4.217.49 | 10.4.217.49 |
| 154 | 10.4.217.50/31 | 10.4.217.50 – 10.4.217.51 | 10.4.217.51 |
| 155 | 10.4.217.52/31 | 10.4.217.52 – 10.4.217.53 | 10.4.217.53 |
| 156 | 10.4.217.54/31 | 10.4.217.54 – 10.4.217.55 | 10.4.217.55 |
| 157 | 10.4.217.56/31 | 10.4.217.56 – 10.4.217.57 | 10.4.217.57 |
| 158 | 10.4.217.58/31 | 10.4.217.58 – 10.4.217.59 | 10.4.217.59 |
| 159 | 10.4.217.60/31 | 10.4.217.60 – 10.4.217.61 | 10.4.217.61 |
| 160 | 10.4.217.62/31 | 10.4.217.62 – 10.4.217.63 | 10.4.217.63 |
| 161 | 10.4.217.64/31 | 10.4.217.64 – 10.4.217.65 | 10.4.217.65 |
| 162 | 10.4.217.66/31 | 10.4.217.66 – 10.4.217.67 | 10.4.217.67 |
| 163 | 10.4.217.68/31 | 10.4.217.68 – 10.4.217.69 | 10.4.217.69 |
| 164 | 10.4.217.70/31 | 10.4.217.70 – 10.4.217.71 | 10.4.217.71 |
| 165 | 10.4.217.72/31 | 10.4.217.72 – 10.4.217.73 | 10.4.217.73 |
| 166 | 10.4.217.74/31 | 10.4.217.74 – 10.4.217.75 | 10.4.217.75 |
| 167 | 10.4.217.76/31 | 10.4.217.76 – 10.4.217.77 | 10.4.217.77 |
| 168 | 10.4.217.78/31 | 10.4.217.78 – 10.4.217.79 | 10.4.217.79 |
| 169 | 10.4.217.80/31 | 10.4.217.80 – 10.4.217.81 | 10.4.217.81 |
| 170 | 10.4.217.82/31 | 10.4.217.82 – 10.4.217.83 | 10.4.217.83 |
| 171 | 10.4.217.84/31 | 10.4.217.84 – 10.4.217.85 | 10.4.217.85 |
| 172 | 10.4.217.86/31 | 10.4.217.86 – 10.4.217.87 | 10.4.217.87 |
| 173 | 10.4.217.88/31 | 10.4.217.88 – 10.4.217.89 | 10.4.217.89 |
| 174 | 10.4.217.90/31 | 10.4.217.90 – 10.4.217.91 | 10.4.217.91 |
| 175 | 10.4.217.92/31 | 10.4.217.92 – 10.4.217.93 | 10.4.217.93 |
| 176 | 10.4.217.94/31 | 10.4.217.94 – 10.4.217.95 | 10.4.217.95 |
| 177 | 10.4.217.96/31 | 10.4.217.96 – 10.4.217.97 | 10.4.217.97 |
| 178 | 10.4.217.98/31 | 10.4.217.98 – 10.4.217.99 | 10.4.217.99 |
| 179 | 10.4.217.100/31 | 10.4.217.100 – 10.4.217.101 | 10.4.217.101 |
| 180 | 10.4.217.102/31 | 10.4.217.102 – 10.4.217.103 | 10.4.217.103 |
| 181 | 10.4.217.104/31 | 10.4.217.104 – 10.4.217.105 | 10.4.217.105 |
| 182 | 10.4.217.106/31 | 10.4.217.106 – 10.4.217.107 | 10.4.217.107 |
| 183 | 10.4.217.108/31 | 10.4.217.108 – 10.4.217.109 | 10.4.217.109 |
| 184 | 10.4.217.110/31 | 10.4.217.110 – 10.4.217.111 | 10.4.217.111 |
| 185 | 10.4.217.112/31 | 10.4.217.112 – 10.4.217.113 | 10.4.217.113 |
| 186 | 10.4.217.114/31 | 10.4.217.114 – 10.4.217.115 | 10.4.217.115 |
| 187 | 10.4.217.116/31 | 10.4.217.116 – 10.4.217.117 | 10.4.217.117 |
| 188 | 10.4.217.118/31 | 10.4.217.118 – 10.4.217.119 | 10.4.217.119 |
| 189 | 10.4.217.120/31 | 10.4.217.120 – 10.4.217.121 | 10.4.217.121 |
| 190 | 10.4.217.122/31 | 10.4.217.122 – 10.4.217.123 | 10.4.217.123 |
| 191 | 10.4.217.124/31 | 10.4.217.124 – 10.4.217.125 | 10.4.217.125 |
| 192 | 10.4.217.126/31 | 10.4.217.126 – 10.4.217.127 | 10.4.217.127 |
| 193 | 10.4.217.128/31 | 10.4.217.128 – 10.4.217.129 | 10.4.217.129 |
| 194 | 10.4.217.130/31 | 10.4.217.130 – 10.4.217.131 | 10.4.217.131 |
| 195 | 10.4.217.132/31 | 10.4.217.132 – 10.4.217.133 | 10.4.217.133 |
| 196 | 10.4.217.134/31 | 10.4.217.134 – 10.4.217.135 | 10.4.217.135 |
| 197 | 10.4.217.136/31 | 10.4.217.136 – 10.4.217.137 | 10.4.217.137 |
| 198 | 10.4.217.138/31 | 10.4.217.138 – 10.4.217.139 | 10.4.217.139 |
| 199 | 10.4.217.140/31 | 10.4.217.140 – 10.4.217.141 | 10.4.217.141 |
| 200 | 10.4.217.142/31 | 10.4.217.142 – 10.4.217.143 | 10.4.217.143 |
| 201 | 10.4.217.144/31 | 10.4.217.144 – 10.4.217.145 | 10.4.217.145 |
| 202 | 10.4.217.146/31 | 10.4.217.146 – 10.4.217.147 | 10.4.217.147 |
| 203 | 10.4.217.148/31 | 10.4.217.148 – 10.4.217.149 | 10.4.217.149 |
| 204 | 10.4.217.150/31 | 10.4.217.150 – 10.4.217.151 | 10.4.217.151 |
| 205 | 10.4.217.152/31 | 10.4.217.152 – 10.4.217.153 | 10.4.217.153 |
| 206 | 10.4.217.154/31 | 10.4.217.154 – 10.4.217.155 | 10.4.217.155 |
| 207 | 10.4.217.156/31 | 10.4.217.156 – 10.4.217.157 | 10.4.217.157 |
| 208 | 10.4.217.158/31 | 10.4.217.158 – 10.4.217.159 | 10.4.217.159 |
| 209 | 10.4.217.160/31 | 10.4.217.160 – 10.4.217.161 | 10.4.217.161 |
| 210 | 10.4.217.162/31 | 10.4.217.162 – 10.4.217.163 | 10.4.217.163 |
| 211 | 10.4.217.164/31 | 10.4.217.164 – 10.4.217.165 | 10.4.217.165 |
| 212 | 10.4.217.166/31 | 10.4.217.166 – 10.4.217.167 | 10.4.217.167 |
| 213 | 10.4.217.168/31 | 10.4.217.168 – 10.4.217.169 | 10.4.217.169 |
| 214 | 10.4.217.170/31 | 10.4.217.170 – 10.4.217.171 | 10.4.217.171 |
| 215 | 10.4.217.172/31 | 10.4.217.172 – 10.4.217.173 | 10.4.217.173 |
| 216 | 10.4.217.174/31 | 10.4.217.174 – 10.4.217.175 | 10.4.217.175 |
| 217 | 10.4.217.176/31 | 10.4.217.176 – 10.4.217.177 | 10.4.217.177 |
| 218 | 10.4.217.178/31 | 10.4.217.178 – 10.4.217.179 | 10.4.217.179 |
| 219 | 10.4.217.180/31 | 10.4.217.180 – 10.4.217.181 | 10.4.217.181 |
| 220 | 10.4.217.182/31 | 10.4.217.182 – 10.4.217.183 | 10.4.217.183 |
| 221 | 10.4.217.184/31 | 10.4.217.184 – 10.4.217.185 | 10.4.217.185 |
| 222 | 10.4.217.186/31 | 10.4.217.186 – 10.4.217.187 | 10.4.217.187 |
| 223 | 10.4.217.188/31 | 10.4.217.188 – 10.4.217.189 | 10.4.217.189 |
| 224 | 10.4.217.190/31 | 10.4.217.190 – 10.4.217.191 | 10.4.217.191 |
| 225 | 10.4.217.192/31 | 10.4.217.192 – 10.4.217.193 | 10.4.217.193 |
| 226 | 10.4.217.194/31 | 10.4.217.194 – 10.4.217.195 | 10.4.217.195 |
| 227 | 10.4.217.196/31 | 10.4.217.196 – 10.4.217.197 | 10.4.217.197 |
| 228 | 10.4.217.198/31 | 10.4.217.198 – 10.4.217.199 | 10.4.217.199 |
| 229 | 10.4.217.200/31 | 10.4.217.200 – 10.4.217.201 | 10.4.217.201 |
| 230 | 10.4.217.202/31 | 10.4.217.202 – 10.4.217.203 | 10.4.217.203 |
| 231 | 10.4.217.204/31 | 10.4.217.204 – 10.4.217.205 | 10.4.217.205 |
| 232 | 10.4.217.206/31 | 10.4.217.206 – 10.4.217.207 | 10.4.217.207 |
| 233 | 10.4.217.208/31 | 10.4.217.208 – 10.4.217.209 | 10.4.217.209 |
| 234 | 10.4.217.210/31 | 10.4.217.210 – 10.4.217.211 | 10.4.217.211 |
| 235 | 10.4.217.212/31 | 10.4.217.212 – 10.4.217.213 | 10.4.217.213 |
| 236 | 10.4.217.214/31 | 10.4.217.214 – 10.4.217.215 | 10.4.217.215 |
| 237 | 10.4.217.216/31 | 10.4.217.216 – 10.4.217.217 | 10.4.217.217 |
| 238 | 10.4.217.218/31 | 10.4.217.218 – 10.4.217.219 | 10.4.217.219 |
| 239 | 10.4.217.220/31 | 10.4.217.220 – 10.4.217.221 | 10.4.217.221 |
| 240 | 10.4.217.222/31 | 10.4.217.222 – 10.4.217.223 | 10.4.217.223 |
| 241 | 10.4.217.224/31 | 10.4.217.224 – 10.4.217.225 | 10.4.217.225 |
| 242 | 10.4.217.226/31 | 10.4.217.226 – 10.4.217.227 | 10.4.217.227 |
| 243 | 10.4.217.228/31 | 10.4.217.228 – 10.4.217.229 | 10.4.217.229 |
| 244 | 10.4.217.230/31 | 10.4.217.230 – 10.4.217.231 | 10.4.217.231 |
| 245 | 10.4.217.232/31 | 10.4.217.232 – 10.4.217.233 | 10.4.217.233 |
| 246 | 10.4.217.234/31 | 10.4.217.234 – 10.4.217.235 | 10.4.217.235 |
| 247 | 10.4.217.236/31 | 10.4.217.236 – 10.4.217.237 | 10.4.217.237 |
| 248 | 10.4.217.238/31 | 10.4.217.238 – 10.4.217.239 | 10.4.217.239 |
| 249 | 10.4.217.240/31 | 10.4.217.240 – 10.4.217.241 | 10.4.217.241 |
| 250 | 10.4.217.242/31 | 10.4.217.242 – 10.4.217.243 | 10.4.217.243 |
| 251 | 10.4.217.244/31 | 10.4.217.244 – 10.4.217.245 | 10.4.217.245 |
| 252 | 10.4.217.246/31 | 10.4.217.246 – 10.4.217.247 | 10.4.217.247 |
| 253 | 10.4.217.248/31 | 10.4.217.248 – 10.4.217.249 | 10.4.217.249 |
| 254 | 10.4.217.250/31 | 10.4.217.250 – 10.4.217.251 | 10.4.217.251 |
| 255 | 10.4.217.252/31 | 10.4.217.252 – 10.4.217.253 | 10.4.217.253 |
| 256 | 10.4.217.254/31 | 10.4.217.254 – 10.4.217.255 | 10.4.217.255 |
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.