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)10.12.48.0/20
network10.12.48.0/20
broadcast10.12.63.255
first host10.12.48.1
last host10.12.63.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.12.48.0/20
address00001010.00001100.00110000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001100.00110000.00000000
broadcast00001010.00001100.00111111.11111111
green = network part, grey = host part
hex0x0a0c3000
decimal168570880
reverse dns0.48.12.10.in-addr.arpa
ipv4-mapped::ffff:a0c:3000
/20 split into /30 · 1,024 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.12.48.0/30 | 10.12.48.1 – 10.12.48.2 | 10.12.48.3 |
| 2 | 10.12.48.4/30 | 10.12.48.5 – 10.12.48.6 | 10.12.48.7 |
| 3 | 10.12.48.8/30 | 10.12.48.9 – 10.12.48.10 | 10.12.48.11 |
| 4 | 10.12.48.12/30 | 10.12.48.13 – 10.12.48.14 | 10.12.48.15 |
| 5 | 10.12.48.16/30 | 10.12.48.17 – 10.12.48.18 | 10.12.48.19 |
| 6 | 10.12.48.20/30 | 10.12.48.21 – 10.12.48.22 | 10.12.48.23 |
| 7 | 10.12.48.24/30 | 10.12.48.25 – 10.12.48.26 | 10.12.48.27 |
| 8 | 10.12.48.28/30 | 10.12.48.29 – 10.12.48.30 | 10.12.48.31 |
| 9 | 10.12.48.32/30 | 10.12.48.33 – 10.12.48.34 | 10.12.48.35 |
| 10 | 10.12.48.36/30 | 10.12.48.37 – 10.12.48.38 | 10.12.48.39 |
| 11 | 10.12.48.40/30 | 10.12.48.41 – 10.12.48.42 | 10.12.48.43 |
| 12 | 10.12.48.44/30 | 10.12.48.45 – 10.12.48.46 | 10.12.48.47 |
| 13 | 10.12.48.48/30 | 10.12.48.49 – 10.12.48.50 | 10.12.48.51 |
| 14 | 10.12.48.52/30 | 10.12.48.53 – 10.12.48.54 | 10.12.48.55 |
| 15 | 10.12.48.56/30 | 10.12.48.57 – 10.12.48.58 | 10.12.48.59 |
| 16 | 10.12.48.60/30 | 10.12.48.61 – 10.12.48.62 | 10.12.48.63 |
| 17 | 10.12.48.64/30 | 10.12.48.65 – 10.12.48.66 | 10.12.48.67 |
| 18 | 10.12.48.68/30 | 10.12.48.69 – 10.12.48.70 | 10.12.48.71 |
| 19 | 10.12.48.72/30 | 10.12.48.73 – 10.12.48.74 | 10.12.48.75 |
| 20 | 10.12.48.76/30 | 10.12.48.77 – 10.12.48.78 | 10.12.48.79 |
| 21 | 10.12.48.80/30 | 10.12.48.81 – 10.12.48.82 | 10.12.48.83 |
| 22 | 10.12.48.84/30 | 10.12.48.85 – 10.12.48.86 | 10.12.48.87 |
| 23 | 10.12.48.88/30 | 10.12.48.89 – 10.12.48.90 | 10.12.48.91 |
| 24 | 10.12.48.92/30 | 10.12.48.93 – 10.12.48.94 | 10.12.48.95 |
| 25 | 10.12.48.96/30 | 10.12.48.97 – 10.12.48.98 | 10.12.48.99 |
| 26 | 10.12.48.100/30 | 10.12.48.101 – 10.12.48.102 | 10.12.48.103 |
| 27 | 10.12.48.104/30 | 10.12.48.105 – 10.12.48.106 | 10.12.48.107 |
| 28 | 10.12.48.108/30 | 10.12.48.109 – 10.12.48.110 | 10.12.48.111 |
| 29 | 10.12.48.112/30 | 10.12.48.113 – 10.12.48.114 | 10.12.48.115 |
| 30 | 10.12.48.116/30 | 10.12.48.117 – 10.12.48.118 | 10.12.48.119 |
| 31 | 10.12.48.120/30 | 10.12.48.121 – 10.12.48.122 | 10.12.48.123 |
| 32 | 10.12.48.124/30 | 10.12.48.125 – 10.12.48.126 | 10.12.48.127 |
| 33 | 10.12.48.128/30 | 10.12.48.129 – 10.12.48.130 | 10.12.48.131 |
| 34 | 10.12.48.132/30 | 10.12.48.133 – 10.12.48.134 | 10.12.48.135 |
| 35 | 10.12.48.136/30 | 10.12.48.137 – 10.12.48.138 | 10.12.48.139 |
| 36 | 10.12.48.140/30 | 10.12.48.141 – 10.12.48.142 | 10.12.48.143 |
| 37 | 10.12.48.144/30 | 10.12.48.145 – 10.12.48.146 | 10.12.48.147 |
| 38 | 10.12.48.148/30 | 10.12.48.149 – 10.12.48.150 | 10.12.48.151 |
| 39 | 10.12.48.152/30 | 10.12.48.153 – 10.12.48.154 | 10.12.48.155 |
| 40 | 10.12.48.156/30 | 10.12.48.157 – 10.12.48.158 | 10.12.48.159 |
| 41 | 10.12.48.160/30 | 10.12.48.161 – 10.12.48.162 | 10.12.48.163 |
| 42 | 10.12.48.164/30 | 10.12.48.165 – 10.12.48.166 | 10.12.48.167 |
| 43 | 10.12.48.168/30 | 10.12.48.169 – 10.12.48.170 | 10.12.48.171 |
| 44 | 10.12.48.172/30 | 10.12.48.173 – 10.12.48.174 | 10.12.48.175 |
| 45 | 10.12.48.176/30 | 10.12.48.177 – 10.12.48.178 | 10.12.48.179 |
| 46 | 10.12.48.180/30 | 10.12.48.181 – 10.12.48.182 | 10.12.48.183 |
| 47 | 10.12.48.184/30 | 10.12.48.185 – 10.12.48.186 | 10.12.48.187 |
| 48 | 10.12.48.188/30 | 10.12.48.189 – 10.12.48.190 | 10.12.48.191 |
| 49 | 10.12.48.192/30 | 10.12.48.193 – 10.12.48.194 | 10.12.48.195 |
| 50 | 10.12.48.196/30 | 10.12.48.197 – 10.12.48.198 | 10.12.48.199 |
| 51 | 10.12.48.200/30 | 10.12.48.201 – 10.12.48.202 | 10.12.48.203 |
| 52 | 10.12.48.204/30 | 10.12.48.205 – 10.12.48.206 | 10.12.48.207 |
| 53 | 10.12.48.208/30 | 10.12.48.209 – 10.12.48.210 | 10.12.48.211 |
| 54 | 10.12.48.212/30 | 10.12.48.213 – 10.12.48.214 | 10.12.48.215 |
| 55 | 10.12.48.216/30 | 10.12.48.217 – 10.12.48.218 | 10.12.48.219 |
| 56 | 10.12.48.220/30 | 10.12.48.221 – 10.12.48.222 | 10.12.48.223 |
| 57 | 10.12.48.224/30 | 10.12.48.225 – 10.12.48.226 | 10.12.48.227 |
| 58 | 10.12.48.228/30 | 10.12.48.229 – 10.12.48.230 | 10.12.48.231 |
| 59 | 10.12.48.232/30 | 10.12.48.233 – 10.12.48.234 | 10.12.48.235 |
| 60 | 10.12.48.236/30 | 10.12.48.237 – 10.12.48.238 | 10.12.48.239 |
| 61 | 10.12.48.240/30 | 10.12.48.241 – 10.12.48.242 | 10.12.48.243 |
| 62 | 10.12.48.244/30 | 10.12.48.245 – 10.12.48.246 | 10.12.48.247 |
| 63 | 10.12.48.248/30 | 10.12.48.249 – 10.12.48.250 | 10.12.48.251 |
| 64 | 10.12.48.252/30 | 10.12.48.253 – 10.12.48.254 | 10.12.48.255 |
| 65 | 10.12.49.0/30 | 10.12.49.1 – 10.12.49.2 | 10.12.49.3 |
| 66 | 10.12.49.4/30 | 10.12.49.5 – 10.12.49.6 | 10.12.49.7 |
| 67 | 10.12.49.8/30 | 10.12.49.9 – 10.12.49.10 | 10.12.49.11 |
| 68 | 10.12.49.12/30 | 10.12.49.13 – 10.12.49.14 | 10.12.49.15 |
| 69 | 10.12.49.16/30 | 10.12.49.17 – 10.12.49.18 | 10.12.49.19 |
| 70 | 10.12.49.20/30 | 10.12.49.21 – 10.12.49.22 | 10.12.49.23 |
| 71 | 10.12.49.24/30 | 10.12.49.25 – 10.12.49.26 | 10.12.49.27 |
| 72 | 10.12.49.28/30 | 10.12.49.29 – 10.12.49.30 | 10.12.49.31 |
| 73 | 10.12.49.32/30 | 10.12.49.33 – 10.12.49.34 | 10.12.49.35 |
| 74 | 10.12.49.36/30 | 10.12.49.37 – 10.12.49.38 | 10.12.49.39 |
| 75 | 10.12.49.40/30 | 10.12.49.41 – 10.12.49.42 | 10.12.49.43 |
| 76 | 10.12.49.44/30 | 10.12.49.45 – 10.12.49.46 | 10.12.49.47 |
| 77 | 10.12.49.48/30 | 10.12.49.49 – 10.12.49.50 | 10.12.49.51 |
| 78 | 10.12.49.52/30 | 10.12.49.53 – 10.12.49.54 | 10.12.49.55 |
| 79 | 10.12.49.56/30 | 10.12.49.57 – 10.12.49.58 | 10.12.49.59 |
| 80 | 10.12.49.60/30 | 10.12.49.61 – 10.12.49.62 | 10.12.49.63 |
| 81 | 10.12.49.64/30 | 10.12.49.65 – 10.12.49.66 | 10.12.49.67 |
| 82 | 10.12.49.68/30 | 10.12.49.69 – 10.12.49.70 | 10.12.49.71 |
| 83 | 10.12.49.72/30 | 10.12.49.73 – 10.12.49.74 | 10.12.49.75 |
| 84 | 10.12.49.76/30 | 10.12.49.77 – 10.12.49.78 | 10.12.49.79 |
| 85 | 10.12.49.80/30 | 10.12.49.81 – 10.12.49.82 | 10.12.49.83 |
| 86 | 10.12.49.84/30 | 10.12.49.85 – 10.12.49.86 | 10.12.49.87 |
| 87 | 10.12.49.88/30 | 10.12.49.89 – 10.12.49.90 | 10.12.49.91 |
| 88 | 10.12.49.92/30 | 10.12.49.93 – 10.12.49.94 | 10.12.49.95 |
| 89 | 10.12.49.96/30 | 10.12.49.97 – 10.12.49.98 | 10.12.49.99 |
| 90 | 10.12.49.100/30 | 10.12.49.101 – 10.12.49.102 | 10.12.49.103 |
| 91 | 10.12.49.104/30 | 10.12.49.105 – 10.12.49.106 | 10.12.49.107 |
| 92 | 10.12.49.108/30 | 10.12.49.109 – 10.12.49.110 | 10.12.49.111 |
| 93 | 10.12.49.112/30 | 10.12.49.113 – 10.12.49.114 | 10.12.49.115 |
| 94 | 10.12.49.116/30 | 10.12.49.117 – 10.12.49.118 | 10.12.49.119 |
| 95 | 10.12.49.120/30 | 10.12.49.121 – 10.12.49.122 | 10.12.49.123 |
| 96 | 10.12.49.124/30 | 10.12.49.125 – 10.12.49.126 | 10.12.49.127 |
| 97 | 10.12.49.128/30 | 10.12.49.129 – 10.12.49.130 | 10.12.49.131 |
| 98 | 10.12.49.132/30 | 10.12.49.133 – 10.12.49.134 | 10.12.49.135 |
| 99 | 10.12.49.136/30 | 10.12.49.137 – 10.12.49.138 | 10.12.49.139 |
| 100 | 10.12.49.140/30 | 10.12.49.141 – 10.12.49.142 | 10.12.49.143 |
| 101 | 10.12.49.144/30 | 10.12.49.145 – 10.12.49.146 | 10.12.49.147 |
| 102 | 10.12.49.148/30 | 10.12.49.149 – 10.12.49.150 | 10.12.49.151 |
| 103 | 10.12.49.152/30 | 10.12.49.153 – 10.12.49.154 | 10.12.49.155 |
| 104 | 10.12.49.156/30 | 10.12.49.157 – 10.12.49.158 | 10.12.49.159 |
| 105 | 10.12.49.160/30 | 10.12.49.161 – 10.12.49.162 | 10.12.49.163 |
| 106 | 10.12.49.164/30 | 10.12.49.165 – 10.12.49.166 | 10.12.49.167 |
| 107 | 10.12.49.168/30 | 10.12.49.169 – 10.12.49.170 | 10.12.49.171 |
| 108 | 10.12.49.172/30 | 10.12.49.173 – 10.12.49.174 | 10.12.49.175 |
| 109 | 10.12.49.176/30 | 10.12.49.177 – 10.12.49.178 | 10.12.49.179 |
| 110 | 10.12.49.180/30 | 10.12.49.181 – 10.12.49.182 | 10.12.49.183 |
| 111 | 10.12.49.184/30 | 10.12.49.185 – 10.12.49.186 | 10.12.49.187 |
| 112 | 10.12.49.188/30 | 10.12.49.189 – 10.12.49.190 | 10.12.49.191 |
| 113 | 10.12.49.192/30 | 10.12.49.193 – 10.12.49.194 | 10.12.49.195 |
| 114 | 10.12.49.196/30 | 10.12.49.197 – 10.12.49.198 | 10.12.49.199 |
| 115 | 10.12.49.200/30 | 10.12.49.201 – 10.12.49.202 | 10.12.49.203 |
| 116 | 10.12.49.204/30 | 10.12.49.205 – 10.12.49.206 | 10.12.49.207 |
| 117 | 10.12.49.208/30 | 10.12.49.209 – 10.12.49.210 | 10.12.49.211 |
| 118 | 10.12.49.212/30 | 10.12.49.213 – 10.12.49.214 | 10.12.49.215 |
| 119 | 10.12.49.216/30 | 10.12.49.217 – 10.12.49.218 | 10.12.49.219 |
| 120 | 10.12.49.220/30 | 10.12.49.221 – 10.12.49.222 | 10.12.49.223 |
| 121 | 10.12.49.224/30 | 10.12.49.225 – 10.12.49.226 | 10.12.49.227 |
| 122 | 10.12.49.228/30 | 10.12.49.229 – 10.12.49.230 | 10.12.49.231 |
| 123 | 10.12.49.232/30 | 10.12.49.233 – 10.12.49.234 | 10.12.49.235 |
| 124 | 10.12.49.236/30 | 10.12.49.237 – 10.12.49.238 | 10.12.49.239 |
| 125 | 10.12.49.240/30 | 10.12.49.241 – 10.12.49.242 | 10.12.49.243 |
| 126 | 10.12.49.244/30 | 10.12.49.245 – 10.12.49.246 | 10.12.49.247 |
| 127 | 10.12.49.248/30 | 10.12.49.249 – 10.12.49.250 | 10.12.49.251 |
| 128 | 10.12.49.252/30 | 10.12.49.253 – 10.12.49.254 | 10.12.49.255 |
| 129 | 10.12.50.0/30 | 10.12.50.1 – 10.12.50.2 | 10.12.50.3 |
| 130 | 10.12.50.4/30 | 10.12.50.5 – 10.12.50.6 | 10.12.50.7 |
| 131 | 10.12.50.8/30 | 10.12.50.9 – 10.12.50.10 | 10.12.50.11 |
| 132 | 10.12.50.12/30 | 10.12.50.13 – 10.12.50.14 | 10.12.50.15 |
| 133 | 10.12.50.16/30 | 10.12.50.17 – 10.12.50.18 | 10.12.50.19 |
| 134 | 10.12.50.20/30 | 10.12.50.21 – 10.12.50.22 | 10.12.50.23 |
| 135 | 10.12.50.24/30 | 10.12.50.25 – 10.12.50.26 | 10.12.50.27 |
| 136 | 10.12.50.28/30 | 10.12.50.29 – 10.12.50.30 | 10.12.50.31 |
| 137 | 10.12.50.32/30 | 10.12.50.33 – 10.12.50.34 | 10.12.50.35 |
| 138 | 10.12.50.36/30 | 10.12.50.37 – 10.12.50.38 | 10.12.50.39 |
| 139 | 10.12.50.40/30 | 10.12.50.41 – 10.12.50.42 | 10.12.50.43 |
| 140 | 10.12.50.44/30 | 10.12.50.45 – 10.12.50.46 | 10.12.50.47 |
| 141 | 10.12.50.48/30 | 10.12.50.49 – 10.12.50.50 | 10.12.50.51 |
| 142 | 10.12.50.52/30 | 10.12.50.53 – 10.12.50.54 | 10.12.50.55 |
| 143 | 10.12.50.56/30 | 10.12.50.57 – 10.12.50.58 | 10.12.50.59 |
| 144 | 10.12.50.60/30 | 10.12.50.61 – 10.12.50.62 | 10.12.50.63 |
| 145 | 10.12.50.64/30 | 10.12.50.65 – 10.12.50.66 | 10.12.50.67 |
| 146 | 10.12.50.68/30 | 10.12.50.69 – 10.12.50.70 | 10.12.50.71 |
| 147 | 10.12.50.72/30 | 10.12.50.73 – 10.12.50.74 | 10.12.50.75 |
| 148 | 10.12.50.76/30 | 10.12.50.77 – 10.12.50.78 | 10.12.50.79 |
| 149 | 10.12.50.80/30 | 10.12.50.81 – 10.12.50.82 | 10.12.50.83 |
| 150 | 10.12.50.84/30 | 10.12.50.85 – 10.12.50.86 | 10.12.50.87 |
| 151 | 10.12.50.88/30 | 10.12.50.89 – 10.12.50.90 | 10.12.50.91 |
| 152 | 10.12.50.92/30 | 10.12.50.93 – 10.12.50.94 | 10.12.50.95 |
| 153 | 10.12.50.96/30 | 10.12.50.97 – 10.12.50.98 | 10.12.50.99 |
| 154 | 10.12.50.100/30 | 10.12.50.101 – 10.12.50.102 | 10.12.50.103 |
| 155 | 10.12.50.104/30 | 10.12.50.105 – 10.12.50.106 | 10.12.50.107 |
| 156 | 10.12.50.108/30 | 10.12.50.109 – 10.12.50.110 | 10.12.50.111 |
| 157 | 10.12.50.112/30 | 10.12.50.113 – 10.12.50.114 | 10.12.50.115 |
| 158 | 10.12.50.116/30 | 10.12.50.117 – 10.12.50.118 | 10.12.50.119 |
| 159 | 10.12.50.120/30 | 10.12.50.121 – 10.12.50.122 | 10.12.50.123 |
| 160 | 10.12.50.124/30 | 10.12.50.125 – 10.12.50.126 | 10.12.50.127 |
| 161 | 10.12.50.128/30 | 10.12.50.129 – 10.12.50.130 | 10.12.50.131 |
| 162 | 10.12.50.132/30 | 10.12.50.133 – 10.12.50.134 | 10.12.50.135 |
| 163 | 10.12.50.136/30 | 10.12.50.137 – 10.12.50.138 | 10.12.50.139 |
| 164 | 10.12.50.140/30 | 10.12.50.141 – 10.12.50.142 | 10.12.50.143 |
| 165 | 10.12.50.144/30 | 10.12.50.145 – 10.12.50.146 | 10.12.50.147 |
| 166 | 10.12.50.148/30 | 10.12.50.149 – 10.12.50.150 | 10.12.50.151 |
| 167 | 10.12.50.152/30 | 10.12.50.153 – 10.12.50.154 | 10.12.50.155 |
| 168 | 10.12.50.156/30 | 10.12.50.157 – 10.12.50.158 | 10.12.50.159 |
| 169 | 10.12.50.160/30 | 10.12.50.161 – 10.12.50.162 | 10.12.50.163 |
| 170 | 10.12.50.164/30 | 10.12.50.165 – 10.12.50.166 | 10.12.50.167 |
| 171 | 10.12.50.168/30 | 10.12.50.169 – 10.12.50.170 | 10.12.50.171 |
| 172 | 10.12.50.172/30 | 10.12.50.173 – 10.12.50.174 | 10.12.50.175 |
| 173 | 10.12.50.176/30 | 10.12.50.177 – 10.12.50.178 | 10.12.50.179 |
| 174 | 10.12.50.180/30 | 10.12.50.181 – 10.12.50.182 | 10.12.50.183 |
| 175 | 10.12.50.184/30 | 10.12.50.185 – 10.12.50.186 | 10.12.50.187 |
| 176 | 10.12.50.188/30 | 10.12.50.189 – 10.12.50.190 | 10.12.50.191 |
| 177 | 10.12.50.192/30 | 10.12.50.193 – 10.12.50.194 | 10.12.50.195 |
| 178 | 10.12.50.196/30 | 10.12.50.197 – 10.12.50.198 | 10.12.50.199 |
| 179 | 10.12.50.200/30 | 10.12.50.201 – 10.12.50.202 | 10.12.50.203 |
| 180 | 10.12.50.204/30 | 10.12.50.205 – 10.12.50.206 | 10.12.50.207 |
| 181 | 10.12.50.208/30 | 10.12.50.209 – 10.12.50.210 | 10.12.50.211 |
| 182 | 10.12.50.212/30 | 10.12.50.213 – 10.12.50.214 | 10.12.50.215 |
| 183 | 10.12.50.216/30 | 10.12.50.217 – 10.12.50.218 | 10.12.50.219 |
| 184 | 10.12.50.220/30 | 10.12.50.221 – 10.12.50.222 | 10.12.50.223 |
| 185 | 10.12.50.224/30 | 10.12.50.225 – 10.12.50.226 | 10.12.50.227 |
| 186 | 10.12.50.228/30 | 10.12.50.229 – 10.12.50.230 | 10.12.50.231 |
| 187 | 10.12.50.232/30 | 10.12.50.233 – 10.12.50.234 | 10.12.50.235 |
| 188 | 10.12.50.236/30 | 10.12.50.237 – 10.12.50.238 | 10.12.50.239 |
| 189 | 10.12.50.240/30 | 10.12.50.241 – 10.12.50.242 | 10.12.50.243 |
| 190 | 10.12.50.244/30 | 10.12.50.245 – 10.12.50.246 | 10.12.50.247 |
| 191 | 10.12.50.248/30 | 10.12.50.249 – 10.12.50.250 | 10.12.50.251 |
| 192 | 10.12.50.252/30 | 10.12.50.253 – 10.12.50.254 | 10.12.50.255 |
| 193 | 10.12.51.0/30 | 10.12.51.1 – 10.12.51.2 | 10.12.51.3 |
| 194 | 10.12.51.4/30 | 10.12.51.5 – 10.12.51.6 | 10.12.51.7 |
| 195 | 10.12.51.8/30 | 10.12.51.9 – 10.12.51.10 | 10.12.51.11 |
| 196 | 10.12.51.12/30 | 10.12.51.13 – 10.12.51.14 | 10.12.51.15 |
| 197 | 10.12.51.16/30 | 10.12.51.17 – 10.12.51.18 | 10.12.51.19 |
| 198 | 10.12.51.20/30 | 10.12.51.21 – 10.12.51.22 | 10.12.51.23 |
| 199 | 10.12.51.24/30 | 10.12.51.25 – 10.12.51.26 | 10.12.51.27 |
| 200 | 10.12.51.28/30 | 10.12.51.29 – 10.12.51.30 | 10.12.51.31 |
| 201 | 10.12.51.32/30 | 10.12.51.33 – 10.12.51.34 | 10.12.51.35 |
| 202 | 10.12.51.36/30 | 10.12.51.37 – 10.12.51.38 | 10.12.51.39 |
| 203 | 10.12.51.40/30 | 10.12.51.41 – 10.12.51.42 | 10.12.51.43 |
| 204 | 10.12.51.44/30 | 10.12.51.45 – 10.12.51.46 | 10.12.51.47 |
| 205 | 10.12.51.48/30 | 10.12.51.49 – 10.12.51.50 | 10.12.51.51 |
| 206 | 10.12.51.52/30 | 10.12.51.53 – 10.12.51.54 | 10.12.51.55 |
| 207 | 10.12.51.56/30 | 10.12.51.57 – 10.12.51.58 | 10.12.51.59 |
| 208 | 10.12.51.60/30 | 10.12.51.61 – 10.12.51.62 | 10.12.51.63 |
| 209 | 10.12.51.64/30 | 10.12.51.65 – 10.12.51.66 | 10.12.51.67 |
| 210 | 10.12.51.68/30 | 10.12.51.69 – 10.12.51.70 | 10.12.51.71 |
| 211 | 10.12.51.72/30 | 10.12.51.73 – 10.12.51.74 | 10.12.51.75 |
| 212 | 10.12.51.76/30 | 10.12.51.77 – 10.12.51.78 | 10.12.51.79 |
| 213 | 10.12.51.80/30 | 10.12.51.81 – 10.12.51.82 | 10.12.51.83 |
| 214 | 10.12.51.84/30 | 10.12.51.85 – 10.12.51.86 | 10.12.51.87 |
| 215 | 10.12.51.88/30 | 10.12.51.89 – 10.12.51.90 | 10.12.51.91 |
| 216 | 10.12.51.92/30 | 10.12.51.93 – 10.12.51.94 | 10.12.51.95 |
| 217 | 10.12.51.96/30 | 10.12.51.97 – 10.12.51.98 | 10.12.51.99 |
| 218 | 10.12.51.100/30 | 10.12.51.101 – 10.12.51.102 | 10.12.51.103 |
| 219 | 10.12.51.104/30 | 10.12.51.105 – 10.12.51.106 | 10.12.51.107 |
| 220 | 10.12.51.108/30 | 10.12.51.109 – 10.12.51.110 | 10.12.51.111 |
| 221 | 10.12.51.112/30 | 10.12.51.113 – 10.12.51.114 | 10.12.51.115 |
| 222 | 10.12.51.116/30 | 10.12.51.117 – 10.12.51.118 | 10.12.51.119 |
| 223 | 10.12.51.120/30 | 10.12.51.121 – 10.12.51.122 | 10.12.51.123 |
| 224 | 10.12.51.124/30 | 10.12.51.125 – 10.12.51.126 | 10.12.51.127 |
| 225 | 10.12.51.128/30 | 10.12.51.129 – 10.12.51.130 | 10.12.51.131 |
| 226 | 10.12.51.132/30 | 10.12.51.133 – 10.12.51.134 | 10.12.51.135 |
| 227 | 10.12.51.136/30 | 10.12.51.137 – 10.12.51.138 | 10.12.51.139 |
| 228 | 10.12.51.140/30 | 10.12.51.141 – 10.12.51.142 | 10.12.51.143 |
| 229 | 10.12.51.144/30 | 10.12.51.145 – 10.12.51.146 | 10.12.51.147 |
| 230 | 10.12.51.148/30 | 10.12.51.149 – 10.12.51.150 | 10.12.51.151 |
| 231 | 10.12.51.152/30 | 10.12.51.153 – 10.12.51.154 | 10.12.51.155 |
| 232 | 10.12.51.156/30 | 10.12.51.157 – 10.12.51.158 | 10.12.51.159 |
| 233 | 10.12.51.160/30 | 10.12.51.161 – 10.12.51.162 | 10.12.51.163 |
| 234 | 10.12.51.164/30 | 10.12.51.165 – 10.12.51.166 | 10.12.51.167 |
| 235 | 10.12.51.168/30 | 10.12.51.169 – 10.12.51.170 | 10.12.51.171 |
| 236 | 10.12.51.172/30 | 10.12.51.173 – 10.12.51.174 | 10.12.51.175 |
| 237 | 10.12.51.176/30 | 10.12.51.177 – 10.12.51.178 | 10.12.51.179 |
| 238 | 10.12.51.180/30 | 10.12.51.181 – 10.12.51.182 | 10.12.51.183 |
| 239 | 10.12.51.184/30 | 10.12.51.185 – 10.12.51.186 | 10.12.51.187 |
| 240 | 10.12.51.188/30 | 10.12.51.189 – 10.12.51.190 | 10.12.51.191 |
| 241 | 10.12.51.192/30 | 10.12.51.193 – 10.12.51.194 | 10.12.51.195 |
| 242 | 10.12.51.196/30 | 10.12.51.197 – 10.12.51.198 | 10.12.51.199 |
| 243 | 10.12.51.200/30 | 10.12.51.201 – 10.12.51.202 | 10.12.51.203 |
| 244 | 10.12.51.204/30 | 10.12.51.205 – 10.12.51.206 | 10.12.51.207 |
| 245 | 10.12.51.208/30 | 10.12.51.209 – 10.12.51.210 | 10.12.51.211 |
| 246 | 10.12.51.212/30 | 10.12.51.213 – 10.12.51.214 | 10.12.51.215 |
| 247 | 10.12.51.216/30 | 10.12.51.217 – 10.12.51.218 | 10.12.51.219 |
| 248 | 10.12.51.220/30 | 10.12.51.221 – 10.12.51.222 | 10.12.51.223 |
| 249 | 10.12.51.224/30 | 10.12.51.225 – 10.12.51.226 | 10.12.51.227 |
| 250 | 10.12.51.228/30 | 10.12.51.229 – 10.12.51.230 | 10.12.51.231 |
| 251 | 10.12.51.232/30 | 10.12.51.233 – 10.12.51.234 | 10.12.51.235 |
| 252 | 10.12.51.236/30 | 10.12.51.237 – 10.12.51.238 | 10.12.51.239 |
| 253 | 10.12.51.240/30 | 10.12.51.241 – 10.12.51.242 | 10.12.51.243 |
| 254 | 10.12.51.244/30 | 10.12.51.245 – 10.12.51.246 | 10.12.51.247 |
| 255 | 10.12.51.248/30 | 10.12.51.249 – 10.12.51.250 | 10.12.51.251 |
| 256 | 10.12.51.252/30 | 10.12.51.253 – 10.12.51.254 | 10.12.51.255 |
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 /20 |
|---|---|---|---|---|
| /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 | 1 |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 2 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 4 split → |
| /23 | 255.255.254.0 | 512 | 510 | 8 split → |
| /24 | 255.255.255.0 | 256 | 254 | 16 split → |
| /25 | 255.255.255.128 | 128 | 126 | 32 split → |
| /26 | 255.255.255.192 | 64 | 62 | 64 split → |
| /27 | 255.255.255.224 | 32 | 30 | 128 split → |
| /28 | 255.255.255.240 | 16 | 14 | 256 split → |
| /29 | 255.255.255.248 | 8 | 6 | 512 split → |
| /30 | 255.255.255.252 | 4 | 2 | 1,024 split → |
| /31 | 255.255.255.254 | 2 | 2 | 2,048 split → |
| /32 | 255.255.255.255 | 1 | 1 | 4,096 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.