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)10.4.240.0/21
network10.4.240.0/21
broadcast10.4.247.255
first host10.4.240.1
last host10.4.247.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.4.240.0/21
address00001010.00000100.11110000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000100.11110000.00000000
broadcast00001010.00000100.11110111.11111111
green = network part, grey = host part
hex0x0a04f000
decimal168095744
reverse dns0.240.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:f000
/21 split into /30 · 512 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.4.240.0/30 | 10.4.240.1 – 10.4.240.2 | 10.4.240.3 |
| 2 | 10.4.240.4/30 | 10.4.240.5 – 10.4.240.6 | 10.4.240.7 |
| 3 | 10.4.240.8/30 | 10.4.240.9 – 10.4.240.10 | 10.4.240.11 |
| 4 | 10.4.240.12/30 | 10.4.240.13 – 10.4.240.14 | 10.4.240.15 |
| 5 | 10.4.240.16/30 | 10.4.240.17 – 10.4.240.18 | 10.4.240.19 |
| 6 | 10.4.240.20/30 | 10.4.240.21 – 10.4.240.22 | 10.4.240.23 |
| 7 | 10.4.240.24/30 | 10.4.240.25 – 10.4.240.26 | 10.4.240.27 |
| 8 | 10.4.240.28/30 | 10.4.240.29 – 10.4.240.30 | 10.4.240.31 |
| 9 | 10.4.240.32/30 | 10.4.240.33 – 10.4.240.34 | 10.4.240.35 |
| 10 | 10.4.240.36/30 | 10.4.240.37 – 10.4.240.38 | 10.4.240.39 |
| 11 | 10.4.240.40/30 | 10.4.240.41 – 10.4.240.42 | 10.4.240.43 |
| 12 | 10.4.240.44/30 | 10.4.240.45 – 10.4.240.46 | 10.4.240.47 |
| 13 | 10.4.240.48/30 | 10.4.240.49 – 10.4.240.50 | 10.4.240.51 |
| 14 | 10.4.240.52/30 | 10.4.240.53 – 10.4.240.54 | 10.4.240.55 |
| 15 | 10.4.240.56/30 | 10.4.240.57 – 10.4.240.58 | 10.4.240.59 |
| 16 | 10.4.240.60/30 | 10.4.240.61 – 10.4.240.62 | 10.4.240.63 |
| 17 | 10.4.240.64/30 | 10.4.240.65 – 10.4.240.66 | 10.4.240.67 |
| 18 | 10.4.240.68/30 | 10.4.240.69 – 10.4.240.70 | 10.4.240.71 |
| 19 | 10.4.240.72/30 | 10.4.240.73 – 10.4.240.74 | 10.4.240.75 |
| 20 | 10.4.240.76/30 | 10.4.240.77 – 10.4.240.78 | 10.4.240.79 |
| 21 | 10.4.240.80/30 | 10.4.240.81 – 10.4.240.82 | 10.4.240.83 |
| 22 | 10.4.240.84/30 | 10.4.240.85 – 10.4.240.86 | 10.4.240.87 |
| 23 | 10.4.240.88/30 | 10.4.240.89 – 10.4.240.90 | 10.4.240.91 |
| 24 | 10.4.240.92/30 | 10.4.240.93 – 10.4.240.94 | 10.4.240.95 |
| 25 | 10.4.240.96/30 | 10.4.240.97 – 10.4.240.98 | 10.4.240.99 |
| 26 | 10.4.240.100/30 | 10.4.240.101 – 10.4.240.102 | 10.4.240.103 |
| 27 | 10.4.240.104/30 | 10.4.240.105 – 10.4.240.106 | 10.4.240.107 |
| 28 | 10.4.240.108/30 | 10.4.240.109 – 10.4.240.110 | 10.4.240.111 |
| 29 | 10.4.240.112/30 | 10.4.240.113 – 10.4.240.114 | 10.4.240.115 |
| 30 | 10.4.240.116/30 | 10.4.240.117 – 10.4.240.118 | 10.4.240.119 |
| 31 | 10.4.240.120/30 | 10.4.240.121 – 10.4.240.122 | 10.4.240.123 |
| 32 | 10.4.240.124/30 | 10.4.240.125 – 10.4.240.126 | 10.4.240.127 |
| 33 | 10.4.240.128/30 | 10.4.240.129 – 10.4.240.130 | 10.4.240.131 |
| 34 | 10.4.240.132/30 | 10.4.240.133 – 10.4.240.134 | 10.4.240.135 |
| 35 | 10.4.240.136/30 | 10.4.240.137 – 10.4.240.138 | 10.4.240.139 |
| 36 | 10.4.240.140/30 | 10.4.240.141 – 10.4.240.142 | 10.4.240.143 |
| 37 | 10.4.240.144/30 | 10.4.240.145 – 10.4.240.146 | 10.4.240.147 |
| 38 | 10.4.240.148/30 | 10.4.240.149 – 10.4.240.150 | 10.4.240.151 |
| 39 | 10.4.240.152/30 | 10.4.240.153 – 10.4.240.154 | 10.4.240.155 |
| 40 | 10.4.240.156/30 | 10.4.240.157 – 10.4.240.158 | 10.4.240.159 |
| 41 | 10.4.240.160/30 | 10.4.240.161 – 10.4.240.162 | 10.4.240.163 |
| 42 | 10.4.240.164/30 | 10.4.240.165 – 10.4.240.166 | 10.4.240.167 |
| 43 | 10.4.240.168/30 | 10.4.240.169 – 10.4.240.170 | 10.4.240.171 |
| 44 | 10.4.240.172/30 | 10.4.240.173 – 10.4.240.174 | 10.4.240.175 |
| 45 | 10.4.240.176/30 | 10.4.240.177 – 10.4.240.178 | 10.4.240.179 |
| 46 | 10.4.240.180/30 | 10.4.240.181 – 10.4.240.182 | 10.4.240.183 |
| 47 | 10.4.240.184/30 | 10.4.240.185 – 10.4.240.186 | 10.4.240.187 |
| 48 | 10.4.240.188/30 | 10.4.240.189 – 10.4.240.190 | 10.4.240.191 |
| 49 | 10.4.240.192/30 | 10.4.240.193 – 10.4.240.194 | 10.4.240.195 |
| 50 | 10.4.240.196/30 | 10.4.240.197 – 10.4.240.198 | 10.4.240.199 |
| 51 | 10.4.240.200/30 | 10.4.240.201 – 10.4.240.202 | 10.4.240.203 |
| 52 | 10.4.240.204/30 | 10.4.240.205 – 10.4.240.206 | 10.4.240.207 |
| 53 | 10.4.240.208/30 | 10.4.240.209 – 10.4.240.210 | 10.4.240.211 |
| 54 | 10.4.240.212/30 | 10.4.240.213 – 10.4.240.214 | 10.4.240.215 |
| 55 | 10.4.240.216/30 | 10.4.240.217 – 10.4.240.218 | 10.4.240.219 |
| 56 | 10.4.240.220/30 | 10.4.240.221 – 10.4.240.222 | 10.4.240.223 |
| 57 | 10.4.240.224/30 | 10.4.240.225 – 10.4.240.226 | 10.4.240.227 |
| 58 | 10.4.240.228/30 | 10.4.240.229 – 10.4.240.230 | 10.4.240.231 |
| 59 | 10.4.240.232/30 | 10.4.240.233 – 10.4.240.234 | 10.4.240.235 |
| 60 | 10.4.240.236/30 | 10.4.240.237 – 10.4.240.238 | 10.4.240.239 |
| 61 | 10.4.240.240/30 | 10.4.240.241 – 10.4.240.242 | 10.4.240.243 |
| 62 | 10.4.240.244/30 | 10.4.240.245 – 10.4.240.246 | 10.4.240.247 |
| 63 | 10.4.240.248/30 | 10.4.240.249 – 10.4.240.250 | 10.4.240.251 |
| 64 | 10.4.240.252/30 | 10.4.240.253 – 10.4.240.254 | 10.4.240.255 |
| 65 | 10.4.241.0/30 | 10.4.241.1 – 10.4.241.2 | 10.4.241.3 |
| 66 | 10.4.241.4/30 | 10.4.241.5 – 10.4.241.6 | 10.4.241.7 |
| 67 | 10.4.241.8/30 | 10.4.241.9 – 10.4.241.10 | 10.4.241.11 |
| 68 | 10.4.241.12/30 | 10.4.241.13 – 10.4.241.14 | 10.4.241.15 |
| 69 | 10.4.241.16/30 | 10.4.241.17 – 10.4.241.18 | 10.4.241.19 |
| 70 | 10.4.241.20/30 | 10.4.241.21 – 10.4.241.22 | 10.4.241.23 |
| 71 | 10.4.241.24/30 | 10.4.241.25 – 10.4.241.26 | 10.4.241.27 |
| 72 | 10.4.241.28/30 | 10.4.241.29 – 10.4.241.30 | 10.4.241.31 |
| 73 | 10.4.241.32/30 | 10.4.241.33 – 10.4.241.34 | 10.4.241.35 |
| 74 | 10.4.241.36/30 | 10.4.241.37 – 10.4.241.38 | 10.4.241.39 |
| 75 | 10.4.241.40/30 | 10.4.241.41 – 10.4.241.42 | 10.4.241.43 |
| 76 | 10.4.241.44/30 | 10.4.241.45 – 10.4.241.46 | 10.4.241.47 |
| 77 | 10.4.241.48/30 | 10.4.241.49 – 10.4.241.50 | 10.4.241.51 |
| 78 | 10.4.241.52/30 | 10.4.241.53 – 10.4.241.54 | 10.4.241.55 |
| 79 | 10.4.241.56/30 | 10.4.241.57 – 10.4.241.58 | 10.4.241.59 |
| 80 | 10.4.241.60/30 | 10.4.241.61 – 10.4.241.62 | 10.4.241.63 |
| 81 | 10.4.241.64/30 | 10.4.241.65 – 10.4.241.66 | 10.4.241.67 |
| 82 | 10.4.241.68/30 | 10.4.241.69 – 10.4.241.70 | 10.4.241.71 |
| 83 | 10.4.241.72/30 | 10.4.241.73 – 10.4.241.74 | 10.4.241.75 |
| 84 | 10.4.241.76/30 | 10.4.241.77 – 10.4.241.78 | 10.4.241.79 |
| 85 | 10.4.241.80/30 | 10.4.241.81 – 10.4.241.82 | 10.4.241.83 |
| 86 | 10.4.241.84/30 | 10.4.241.85 – 10.4.241.86 | 10.4.241.87 |
| 87 | 10.4.241.88/30 | 10.4.241.89 – 10.4.241.90 | 10.4.241.91 |
| 88 | 10.4.241.92/30 | 10.4.241.93 – 10.4.241.94 | 10.4.241.95 |
| 89 | 10.4.241.96/30 | 10.4.241.97 – 10.4.241.98 | 10.4.241.99 |
| 90 | 10.4.241.100/30 | 10.4.241.101 – 10.4.241.102 | 10.4.241.103 |
| 91 | 10.4.241.104/30 | 10.4.241.105 – 10.4.241.106 | 10.4.241.107 |
| 92 | 10.4.241.108/30 | 10.4.241.109 – 10.4.241.110 | 10.4.241.111 |
| 93 | 10.4.241.112/30 | 10.4.241.113 – 10.4.241.114 | 10.4.241.115 |
| 94 | 10.4.241.116/30 | 10.4.241.117 – 10.4.241.118 | 10.4.241.119 |
| 95 | 10.4.241.120/30 | 10.4.241.121 – 10.4.241.122 | 10.4.241.123 |
| 96 | 10.4.241.124/30 | 10.4.241.125 – 10.4.241.126 | 10.4.241.127 |
| 97 | 10.4.241.128/30 | 10.4.241.129 – 10.4.241.130 | 10.4.241.131 |
| 98 | 10.4.241.132/30 | 10.4.241.133 – 10.4.241.134 | 10.4.241.135 |
| 99 | 10.4.241.136/30 | 10.4.241.137 – 10.4.241.138 | 10.4.241.139 |
| 100 | 10.4.241.140/30 | 10.4.241.141 – 10.4.241.142 | 10.4.241.143 |
| 101 | 10.4.241.144/30 | 10.4.241.145 – 10.4.241.146 | 10.4.241.147 |
| 102 | 10.4.241.148/30 | 10.4.241.149 – 10.4.241.150 | 10.4.241.151 |
| 103 | 10.4.241.152/30 | 10.4.241.153 – 10.4.241.154 | 10.4.241.155 |
| 104 | 10.4.241.156/30 | 10.4.241.157 – 10.4.241.158 | 10.4.241.159 |
| 105 | 10.4.241.160/30 | 10.4.241.161 – 10.4.241.162 | 10.4.241.163 |
| 106 | 10.4.241.164/30 | 10.4.241.165 – 10.4.241.166 | 10.4.241.167 |
| 107 | 10.4.241.168/30 | 10.4.241.169 – 10.4.241.170 | 10.4.241.171 |
| 108 | 10.4.241.172/30 | 10.4.241.173 – 10.4.241.174 | 10.4.241.175 |
| 109 | 10.4.241.176/30 | 10.4.241.177 – 10.4.241.178 | 10.4.241.179 |
| 110 | 10.4.241.180/30 | 10.4.241.181 – 10.4.241.182 | 10.4.241.183 |
| 111 | 10.4.241.184/30 | 10.4.241.185 – 10.4.241.186 | 10.4.241.187 |
| 112 | 10.4.241.188/30 | 10.4.241.189 – 10.4.241.190 | 10.4.241.191 |
| 113 | 10.4.241.192/30 | 10.4.241.193 – 10.4.241.194 | 10.4.241.195 |
| 114 | 10.4.241.196/30 | 10.4.241.197 – 10.4.241.198 | 10.4.241.199 |
| 115 | 10.4.241.200/30 | 10.4.241.201 – 10.4.241.202 | 10.4.241.203 |
| 116 | 10.4.241.204/30 | 10.4.241.205 – 10.4.241.206 | 10.4.241.207 |
| 117 | 10.4.241.208/30 | 10.4.241.209 – 10.4.241.210 | 10.4.241.211 |
| 118 | 10.4.241.212/30 | 10.4.241.213 – 10.4.241.214 | 10.4.241.215 |
| 119 | 10.4.241.216/30 | 10.4.241.217 – 10.4.241.218 | 10.4.241.219 |
| 120 | 10.4.241.220/30 | 10.4.241.221 – 10.4.241.222 | 10.4.241.223 |
| 121 | 10.4.241.224/30 | 10.4.241.225 – 10.4.241.226 | 10.4.241.227 |
| 122 | 10.4.241.228/30 | 10.4.241.229 – 10.4.241.230 | 10.4.241.231 |
| 123 | 10.4.241.232/30 | 10.4.241.233 – 10.4.241.234 | 10.4.241.235 |
| 124 | 10.4.241.236/30 | 10.4.241.237 – 10.4.241.238 | 10.4.241.239 |
| 125 | 10.4.241.240/30 | 10.4.241.241 – 10.4.241.242 | 10.4.241.243 |
| 126 | 10.4.241.244/30 | 10.4.241.245 – 10.4.241.246 | 10.4.241.247 |
| 127 | 10.4.241.248/30 | 10.4.241.249 – 10.4.241.250 | 10.4.241.251 |
| 128 | 10.4.241.252/30 | 10.4.241.253 – 10.4.241.254 | 10.4.241.255 |
| 129 | 10.4.242.0/30 | 10.4.242.1 – 10.4.242.2 | 10.4.242.3 |
| 130 | 10.4.242.4/30 | 10.4.242.5 – 10.4.242.6 | 10.4.242.7 |
| 131 | 10.4.242.8/30 | 10.4.242.9 – 10.4.242.10 | 10.4.242.11 |
| 132 | 10.4.242.12/30 | 10.4.242.13 – 10.4.242.14 | 10.4.242.15 |
| 133 | 10.4.242.16/30 | 10.4.242.17 – 10.4.242.18 | 10.4.242.19 |
| 134 | 10.4.242.20/30 | 10.4.242.21 – 10.4.242.22 | 10.4.242.23 |
| 135 | 10.4.242.24/30 | 10.4.242.25 – 10.4.242.26 | 10.4.242.27 |
| 136 | 10.4.242.28/30 | 10.4.242.29 – 10.4.242.30 | 10.4.242.31 |
| 137 | 10.4.242.32/30 | 10.4.242.33 – 10.4.242.34 | 10.4.242.35 |
| 138 | 10.4.242.36/30 | 10.4.242.37 – 10.4.242.38 | 10.4.242.39 |
| 139 | 10.4.242.40/30 | 10.4.242.41 – 10.4.242.42 | 10.4.242.43 |
| 140 | 10.4.242.44/30 | 10.4.242.45 – 10.4.242.46 | 10.4.242.47 |
| 141 | 10.4.242.48/30 | 10.4.242.49 – 10.4.242.50 | 10.4.242.51 |
| 142 | 10.4.242.52/30 | 10.4.242.53 – 10.4.242.54 | 10.4.242.55 |
| 143 | 10.4.242.56/30 | 10.4.242.57 – 10.4.242.58 | 10.4.242.59 |
| 144 | 10.4.242.60/30 | 10.4.242.61 – 10.4.242.62 | 10.4.242.63 |
| 145 | 10.4.242.64/30 | 10.4.242.65 – 10.4.242.66 | 10.4.242.67 |
| 146 | 10.4.242.68/30 | 10.4.242.69 – 10.4.242.70 | 10.4.242.71 |
| 147 | 10.4.242.72/30 | 10.4.242.73 – 10.4.242.74 | 10.4.242.75 |
| 148 | 10.4.242.76/30 | 10.4.242.77 – 10.4.242.78 | 10.4.242.79 |
| 149 | 10.4.242.80/30 | 10.4.242.81 – 10.4.242.82 | 10.4.242.83 |
| 150 | 10.4.242.84/30 | 10.4.242.85 – 10.4.242.86 | 10.4.242.87 |
| 151 | 10.4.242.88/30 | 10.4.242.89 – 10.4.242.90 | 10.4.242.91 |
| 152 | 10.4.242.92/30 | 10.4.242.93 – 10.4.242.94 | 10.4.242.95 |
| 153 | 10.4.242.96/30 | 10.4.242.97 – 10.4.242.98 | 10.4.242.99 |
| 154 | 10.4.242.100/30 | 10.4.242.101 – 10.4.242.102 | 10.4.242.103 |
| 155 | 10.4.242.104/30 | 10.4.242.105 – 10.4.242.106 | 10.4.242.107 |
| 156 | 10.4.242.108/30 | 10.4.242.109 – 10.4.242.110 | 10.4.242.111 |
| 157 | 10.4.242.112/30 | 10.4.242.113 – 10.4.242.114 | 10.4.242.115 |
| 158 | 10.4.242.116/30 | 10.4.242.117 – 10.4.242.118 | 10.4.242.119 |
| 159 | 10.4.242.120/30 | 10.4.242.121 – 10.4.242.122 | 10.4.242.123 |
| 160 | 10.4.242.124/30 | 10.4.242.125 – 10.4.242.126 | 10.4.242.127 |
| 161 | 10.4.242.128/30 | 10.4.242.129 – 10.4.242.130 | 10.4.242.131 |
| 162 | 10.4.242.132/30 | 10.4.242.133 – 10.4.242.134 | 10.4.242.135 |
| 163 | 10.4.242.136/30 | 10.4.242.137 – 10.4.242.138 | 10.4.242.139 |
| 164 | 10.4.242.140/30 | 10.4.242.141 – 10.4.242.142 | 10.4.242.143 |
| 165 | 10.4.242.144/30 | 10.4.242.145 – 10.4.242.146 | 10.4.242.147 |
| 166 | 10.4.242.148/30 | 10.4.242.149 – 10.4.242.150 | 10.4.242.151 |
| 167 | 10.4.242.152/30 | 10.4.242.153 – 10.4.242.154 | 10.4.242.155 |
| 168 | 10.4.242.156/30 | 10.4.242.157 – 10.4.242.158 | 10.4.242.159 |
| 169 | 10.4.242.160/30 | 10.4.242.161 – 10.4.242.162 | 10.4.242.163 |
| 170 | 10.4.242.164/30 | 10.4.242.165 – 10.4.242.166 | 10.4.242.167 |
| 171 | 10.4.242.168/30 | 10.4.242.169 – 10.4.242.170 | 10.4.242.171 |
| 172 | 10.4.242.172/30 | 10.4.242.173 – 10.4.242.174 | 10.4.242.175 |
| 173 | 10.4.242.176/30 | 10.4.242.177 – 10.4.242.178 | 10.4.242.179 |
| 174 | 10.4.242.180/30 | 10.4.242.181 – 10.4.242.182 | 10.4.242.183 |
| 175 | 10.4.242.184/30 | 10.4.242.185 – 10.4.242.186 | 10.4.242.187 |
| 176 | 10.4.242.188/30 | 10.4.242.189 – 10.4.242.190 | 10.4.242.191 |
| 177 | 10.4.242.192/30 | 10.4.242.193 – 10.4.242.194 | 10.4.242.195 |
| 178 | 10.4.242.196/30 | 10.4.242.197 – 10.4.242.198 | 10.4.242.199 |
| 179 | 10.4.242.200/30 | 10.4.242.201 – 10.4.242.202 | 10.4.242.203 |
| 180 | 10.4.242.204/30 | 10.4.242.205 – 10.4.242.206 | 10.4.242.207 |
| 181 | 10.4.242.208/30 | 10.4.242.209 – 10.4.242.210 | 10.4.242.211 |
| 182 | 10.4.242.212/30 | 10.4.242.213 – 10.4.242.214 | 10.4.242.215 |
| 183 | 10.4.242.216/30 | 10.4.242.217 – 10.4.242.218 | 10.4.242.219 |
| 184 | 10.4.242.220/30 | 10.4.242.221 – 10.4.242.222 | 10.4.242.223 |
| 185 | 10.4.242.224/30 | 10.4.242.225 – 10.4.242.226 | 10.4.242.227 |
| 186 | 10.4.242.228/30 | 10.4.242.229 – 10.4.242.230 | 10.4.242.231 |
| 187 | 10.4.242.232/30 | 10.4.242.233 – 10.4.242.234 | 10.4.242.235 |
| 188 | 10.4.242.236/30 | 10.4.242.237 – 10.4.242.238 | 10.4.242.239 |
| 189 | 10.4.242.240/30 | 10.4.242.241 – 10.4.242.242 | 10.4.242.243 |
| 190 | 10.4.242.244/30 | 10.4.242.245 – 10.4.242.246 | 10.4.242.247 |
| 191 | 10.4.242.248/30 | 10.4.242.249 – 10.4.242.250 | 10.4.242.251 |
| 192 | 10.4.242.252/30 | 10.4.242.253 – 10.4.242.254 | 10.4.242.255 |
| 193 | 10.4.243.0/30 | 10.4.243.1 – 10.4.243.2 | 10.4.243.3 |
| 194 | 10.4.243.4/30 | 10.4.243.5 – 10.4.243.6 | 10.4.243.7 |
| 195 | 10.4.243.8/30 | 10.4.243.9 – 10.4.243.10 | 10.4.243.11 |
| 196 | 10.4.243.12/30 | 10.4.243.13 – 10.4.243.14 | 10.4.243.15 |
| 197 | 10.4.243.16/30 | 10.4.243.17 – 10.4.243.18 | 10.4.243.19 |
| 198 | 10.4.243.20/30 | 10.4.243.21 – 10.4.243.22 | 10.4.243.23 |
| 199 | 10.4.243.24/30 | 10.4.243.25 – 10.4.243.26 | 10.4.243.27 |
| 200 | 10.4.243.28/30 | 10.4.243.29 – 10.4.243.30 | 10.4.243.31 |
| 201 | 10.4.243.32/30 | 10.4.243.33 – 10.4.243.34 | 10.4.243.35 |
| 202 | 10.4.243.36/30 | 10.4.243.37 – 10.4.243.38 | 10.4.243.39 |
| 203 | 10.4.243.40/30 | 10.4.243.41 – 10.4.243.42 | 10.4.243.43 |
| 204 | 10.4.243.44/30 | 10.4.243.45 – 10.4.243.46 | 10.4.243.47 |
| 205 | 10.4.243.48/30 | 10.4.243.49 – 10.4.243.50 | 10.4.243.51 |
| 206 | 10.4.243.52/30 | 10.4.243.53 – 10.4.243.54 | 10.4.243.55 |
| 207 | 10.4.243.56/30 | 10.4.243.57 – 10.4.243.58 | 10.4.243.59 |
| 208 | 10.4.243.60/30 | 10.4.243.61 – 10.4.243.62 | 10.4.243.63 |
| 209 | 10.4.243.64/30 | 10.4.243.65 – 10.4.243.66 | 10.4.243.67 |
| 210 | 10.4.243.68/30 | 10.4.243.69 – 10.4.243.70 | 10.4.243.71 |
| 211 | 10.4.243.72/30 | 10.4.243.73 – 10.4.243.74 | 10.4.243.75 |
| 212 | 10.4.243.76/30 | 10.4.243.77 – 10.4.243.78 | 10.4.243.79 |
| 213 | 10.4.243.80/30 | 10.4.243.81 – 10.4.243.82 | 10.4.243.83 |
| 214 | 10.4.243.84/30 | 10.4.243.85 – 10.4.243.86 | 10.4.243.87 |
| 215 | 10.4.243.88/30 | 10.4.243.89 – 10.4.243.90 | 10.4.243.91 |
| 216 | 10.4.243.92/30 | 10.4.243.93 – 10.4.243.94 | 10.4.243.95 |
| 217 | 10.4.243.96/30 | 10.4.243.97 – 10.4.243.98 | 10.4.243.99 |
| 218 | 10.4.243.100/30 | 10.4.243.101 – 10.4.243.102 | 10.4.243.103 |
| 219 | 10.4.243.104/30 | 10.4.243.105 – 10.4.243.106 | 10.4.243.107 |
| 220 | 10.4.243.108/30 | 10.4.243.109 – 10.4.243.110 | 10.4.243.111 |
| 221 | 10.4.243.112/30 | 10.4.243.113 – 10.4.243.114 | 10.4.243.115 |
| 222 | 10.4.243.116/30 | 10.4.243.117 – 10.4.243.118 | 10.4.243.119 |
| 223 | 10.4.243.120/30 | 10.4.243.121 – 10.4.243.122 | 10.4.243.123 |
| 224 | 10.4.243.124/30 | 10.4.243.125 – 10.4.243.126 | 10.4.243.127 |
| 225 | 10.4.243.128/30 | 10.4.243.129 – 10.4.243.130 | 10.4.243.131 |
| 226 | 10.4.243.132/30 | 10.4.243.133 – 10.4.243.134 | 10.4.243.135 |
| 227 | 10.4.243.136/30 | 10.4.243.137 – 10.4.243.138 | 10.4.243.139 |
| 228 | 10.4.243.140/30 | 10.4.243.141 – 10.4.243.142 | 10.4.243.143 |
| 229 | 10.4.243.144/30 | 10.4.243.145 – 10.4.243.146 | 10.4.243.147 |
| 230 | 10.4.243.148/30 | 10.4.243.149 – 10.4.243.150 | 10.4.243.151 |
| 231 | 10.4.243.152/30 | 10.4.243.153 – 10.4.243.154 | 10.4.243.155 |
| 232 | 10.4.243.156/30 | 10.4.243.157 – 10.4.243.158 | 10.4.243.159 |
| 233 | 10.4.243.160/30 | 10.4.243.161 – 10.4.243.162 | 10.4.243.163 |
| 234 | 10.4.243.164/30 | 10.4.243.165 – 10.4.243.166 | 10.4.243.167 |
| 235 | 10.4.243.168/30 | 10.4.243.169 – 10.4.243.170 | 10.4.243.171 |
| 236 | 10.4.243.172/30 | 10.4.243.173 – 10.4.243.174 | 10.4.243.175 |
| 237 | 10.4.243.176/30 | 10.4.243.177 – 10.4.243.178 | 10.4.243.179 |
| 238 | 10.4.243.180/30 | 10.4.243.181 – 10.4.243.182 | 10.4.243.183 |
| 239 | 10.4.243.184/30 | 10.4.243.185 – 10.4.243.186 | 10.4.243.187 |
| 240 | 10.4.243.188/30 | 10.4.243.189 – 10.4.243.190 | 10.4.243.191 |
| 241 | 10.4.243.192/30 | 10.4.243.193 – 10.4.243.194 | 10.4.243.195 |
| 242 | 10.4.243.196/30 | 10.4.243.197 – 10.4.243.198 | 10.4.243.199 |
| 243 | 10.4.243.200/30 | 10.4.243.201 – 10.4.243.202 | 10.4.243.203 |
| 244 | 10.4.243.204/30 | 10.4.243.205 – 10.4.243.206 | 10.4.243.207 |
| 245 | 10.4.243.208/30 | 10.4.243.209 – 10.4.243.210 | 10.4.243.211 |
| 246 | 10.4.243.212/30 | 10.4.243.213 – 10.4.243.214 | 10.4.243.215 |
| 247 | 10.4.243.216/30 | 10.4.243.217 – 10.4.243.218 | 10.4.243.219 |
| 248 | 10.4.243.220/30 | 10.4.243.221 – 10.4.243.222 | 10.4.243.223 |
| 249 | 10.4.243.224/30 | 10.4.243.225 – 10.4.243.226 | 10.4.243.227 |
| 250 | 10.4.243.228/30 | 10.4.243.229 – 10.4.243.230 | 10.4.243.231 |
| 251 | 10.4.243.232/30 | 10.4.243.233 – 10.4.243.234 | 10.4.243.235 |
| 252 | 10.4.243.236/30 | 10.4.243.237 – 10.4.243.238 | 10.4.243.239 |
| 253 | 10.4.243.240/30 | 10.4.243.241 – 10.4.243.242 | 10.4.243.243 |
| 254 | 10.4.243.244/30 | 10.4.243.245 – 10.4.243.246 | 10.4.243.247 |
| 255 | 10.4.243.248/30 | 10.4.243.249 – 10.4.243.250 | 10.4.243.251 |
| 256 | 10.4.243.252/30 | 10.4.243.253 – 10.4.243.254 | 10.4.243.255 |
showing 256 of 512
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.