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)10.20.128.0/18
network10.20.128.0/18
broadcast10.20.191.255
first host10.20.128.1
last host10.20.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.20.128.0/18
address00001010.00010100.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00010100.10000000.00000000
broadcast00001010.00010100.10111111.11111111
green = network part, grey = host part
hex0x0a148000
decimal169115648
reverse dns0.128.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:8000
/18 split into /30 · 4,096 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.20.128.0/30 | 10.20.128.1 – 10.20.128.2 | 10.20.128.3 |
| 2 | 10.20.128.4/30 | 10.20.128.5 – 10.20.128.6 | 10.20.128.7 |
| 3 | 10.20.128.8/30 | 10.20.128.9 – 10.20.128.10 | 10.20.128.11 |
| 4 | 10.20.128.12/30 | 10.20.128.13 – 10.20.128.14 | 10.20.128.15 |
| 5 | 10.20.128.16/30 | 10.20.128.17 – 10.20.128.18 | 10.20.128.19 |
| 6 | 10.20.128.20/30 | 10.20.128.21 – 10.20.128.22 | 10.20.128.23 |
| 7 | 10.20.128.24/30 | 10.20.128.25 – 10.20.128.26 | 10.20.128.27 |
| 8 | 10.20.128.28/30 | 10.20.128.29 – 10.20.128.30 | 10.20.128.31 |
| 9 | 10.20.128.32/30 | 10.20.128.33 – 10.20.128.34 | 10.20.128.35 |
| 10 | 10.20.128.36/30 | 10.20.128.37 – 10.20.128.38 | 10.20.128.39 |
| 11 | 10.20.128.40/30 | 10.20.128.41 – 10.20.128.42 | 10.20.128.43 |
| 12 | 10.20.128.44/30 | 10.20.128.45 – 10.20.128.46 | 10.20.128.47 |
| 13 | 10.20.128.48/30 | 10.20.128.49 – 10.20.128.50 | 10.20.128.51 |
| 14 | 10.20.128.52/30 | 10.20.128.53 – 10.20.128.54 | 10.20.128.55 |
| 15 | 10.20.128.56/30 | 10.20.128.57 – 10.20.128.58 | 10.20.128.59 |
| 16 | 10.20.128.60/30 | 10.20.128.61 – 10.20.128.62 | 10.20.128.63 |
| 17 | 10.20.128.64/30 | 10.20.128.65 – 10.20.128.66 | 10.20.128.67 |
| 18 | 10.20.128.68/30 | 10.20.128.69 – 10.20.128.70 | 10.20.128.71 |
| 19 | 10.20.128.72/30 | 10.20.128.73 – 10.20.128.74 | 10.20.128.75 |
| 20 | 10.20.128.76/30 | 10.20.128.77 – 10.20.128.78 | 10.20.128.79 |
| 21 | 10.20.128.80/30 | 10.20.128.81 – 10.20.128.82 | 10.20.128.83 |
| 22 | 10.20.128.84/30 | 10.20.128.85 – 10.20.128.86 | 10.20.128.87 |
| 23 | 10.20.128.88/30 | 10.20.128.89 – 10.20.128.90 | 10.20.128.91 |
| 24 | 10.20.128.92/30 | 10.20.128.93 – 10.20.128.94 | 10.20.128.95 |
| 25 | 10.20.128.96/30 | 10.20.128.97 – 10.20.128.98 | 10.20.128.99 |
| 26 | 10.20.128.100/30 | 10.20.128.101 – 10.20.128.102 | 10.20.128.103 |
| 27 | 10.20.128.104/30 | 10.20.128.105 – 10.20.128.106 | 10.20.128.107 |
| 28 | 10.20.128.108/30 | 10.20.128.109 – 10.20.128.110 | 10.20.128.111 |
| 29 | 10.20.128.112/30 | 10.20.128.113 – 10.20.128.114 | 10.20.128.115 |
| 30 | 10.20.128.116/30 | 10.20.128.117 – 10.20.128.118 | 10.20.128.119 |
| 31 | 10.20.128.120/30 | 10.20.128.121 – 10.20.128.122 | 10.20.128.123 |
| 32 | 10.20.128.124/30 | 10.20.128.125 – 10.20.128.126 | 10.20.128.127 |
| 33 | 10.20.128.128/30 | 10.20.128.129 – 10.20.128.130 | 10.20.128.131 |
| 34 | 10.20.128.132/30 | 10.20.128.133 – 10.20.128.134 | 10.20.128.135 |
| 35 | 10.20.128.136/30 | 10.20.128.137 – 10.20.128.138 | 10.20.128.139 |
| 36 | 10.20.128.140/30 | 10.20.128.141 – 10.20.128.142 | 10.20.128.143 |
| 37 | 10.20.128.144/30 | 10.20.128.145 – 10.20.128.146 | 10.20.128.147 |
| 38 | 10.20.128.148/30 | 10.20.128.149 – 10.20.128.150 | 10.20.128.151 |
| 39 | 10.20.128.152/30 | 10.20.128.153 – 10.20.128.154 | 10.20.128.155 |
| 40 | 10.20.128.156/30 | 10.20.128.157 – 10.20.128.158 | 10.20.128.159 |
| 41 | 10.20.128.160/30 | 10.20.128.161 – 10.20.128.162 | 10.20.128.163 |
| 42 | 10.20.128.164/30 | 10.20.128.165 – 10.20.128.166 | 10.20.128.167 |
| 43 | 10.20.128.168/30 | 10.20.128.169 – 10.20.128.170 | 10.20.128.171 |
| 44 | 10.20.128.172/30 | 10.20.128.173 – 10.20.128.174 | 10.20.128.175 |
| 45 | 10.20.128.176/30 | 10.20.128.177 – 10.20.128.178 | 10.20.128.179 |
| 46 | 10.20.128.180/30 | 10.20.128.181 – 10.20.128.182 | 10.20.128.183 |
| 47 | 10.20.128.184/30 | 10.20.128.185 – 10.20.128.186 | 10.20.128.187 |
| 48 | 10.20.128.188/30 | 10.20.128.189 – 10.20.128.190 | 10.20.128.191 |
| 49 | 10.20.128.192/30 | 10.20.128.193 – 10.20.128.194 | 10.20.128.195 |
| 50 | 10.20.128.196/30 | 10.20.128.197 – 10.20.128.198 | 10.20.128.199 |
| 51 | 10.20.128.200/30 | 10.20.128.201 – 10.20.128.202 | 10.20.128.203 |
| 52 | 10.20.128.204/30 | 10.20.128.205 – 10.20.128.206 | 10.20.128.207 |
| 53 | 10.20.128.208/30 | 10.20.128.209 – 10.20.128.210 | 10.20.128.211 |
| 54 | 10.20.128.212/30 | 10.20.128.213 – 10.20.128.214 | 10.20.128.215 |
| 55 | 10.20.128.216/30 | 10.20.128.217 – 10.20.128.218 | 10.20.128.219 |
| 56 | 10.20.128.220/30 | 10.20.128.221 – 10.20.128.222 | 10.20.128.223 |
| 57 | 10.20.128.224/30 | 10.20.128.225 – 10.20.128.226 | 10.20.128.227 |
| 58 | 10.20.128.228/30 | 10.20.128.229 – 10.20.128.230 | 10.20.128.231 |
| 59 | 10.20.128.232/30 | 10.20.128.233 – 10.20.128.234 | 10.20.128.235 |
| 60 | 10.20.128.236/30 | 10.20.128.237 – 10.20.128.238 | 10.20.128.239 |
| 61 | 10.20.128.240/30 | 10.20.128.241 – 10.20.128.242 | 10.20.128.243 |
| 62 | 10.20.128.244/30 | 10.20.128.245 – 10.20.128.246 | 10.20.128.247 |
| 63 | 10.20.128.248/30 | 10.20.128.249 – 10.20.128.250 | 10.20.128.251 |
| 64 | 10.20.128.252/30 | 10.20.128.253 – 10.20.128.254 | 10.20.128.255 |
| 65 | 10.20.129.0/30 | 10.20.129.1 – 10.20.129.2 | 10.20.129.3 |
| 66 | 10.20.129.4/30 | 10.20.129.5 – 10.20.129.6 | 10.20.129.7 |
| 67 | 10.20.129.8/30 | 10.20.129.9 – 10.20.129.10 | 10.20.129.11 |
| 68 | 10.20.129.12/30 | 10.20.129.13 – 10.20.129.14 | 10.20.129.15 |
| 69 | 10.20.129.16/30 | 10.20.129.17 – 10.20.129.18 | 10.20.129.19 |
| 70 | 10.20.129.20/30 | 10.20.129.21 – 10.20.129.22 | 10.20.129.23 |
| 71 | 10.20.129.24/30 | 10.20.129.25 – 10.20.129.26 | 10.20.129.27 |
| 72 | 10.20.129.28/30 | 10.20.129.29 – 10.20.129.30 | 10.20.129.31 |
| 73 | 10.20.129.32/30 | 10.20.129.33 – 10.20.129.34 | 10.20.129.35 |
| 74 | 10.20.129.36/30 | 10.20.129.37 – 10.20.129.38 | 10.20.129.39 |
| 75 | 10.20.129.40/30 | 10.20.129.41 – 10.20.129.42 | 10.20.129.43 |
| 76 | 10.20.129.44/30 | 10.20.129.45 – 10.20.129.46 | 10.20.129.47 |
| 77 | 10.20.129.48/30 | 10.20.129.49 – 10.20.129.50 | 10.20.129.51 |
| 78 | 10.20.129.52/30 | 10.20.129.53 – 10.20.129.54 | 10.20.129.55 |
| 79 | 10.20.129.56/30 | 10.20.129.57 – 10.20.129.58 | 10.20.129.59 |
| 80 | 10.20.129.60/30 | 10.20.129.61 – 10.20.129.62 | 10.20.129.63 |
| 81 | 10.20.129.64/30 | 10.20.129.65 – 10.20.129.66 | 10.20.129.67 |
| 82 | 10.20.129.68/30 | 10.20.129.69 – 10.20.129.70 | 10.20.129.71 |
| 83 | 10.20.129.72/30 | 10.20.129.73 – 10.20.129.74 | 10.20.129.75 |
| 84 | 10.20.129.76/30 | 10.20.129.77 – 10.20.129.78 | 10.20.129.79 |
| 85 | 10.20.129.80/30 | 10.20.129.81 – 10.20.129.82 | 10.20.129.83 |
| 86 | 10.20.129.84/30 | 10.20.129.85 – 10.20.129.86 | 10.20.129.87 |
| 87 | 10.20.129.88/30 | 10.20.129.89 – 10.20.129.90 | 10.20.129.91 |
| 88 | 10.20.129.92/30 | 10.20.129.93 – 10.20.129.94 | 10.20.129.95 |
| 89 | 10.20.129.96/30 | 10.20.129.97 – 10.20.129.98 | 10.20.129.99 |
| 90 | 10.20.129.100/30 | 10.20.129.101 – 10.20.129.102 | 10.20.129.103 |
| 91 | 10.20.129.104/30 | 10.20.129.105 – 10.20.129.106 | 10.20.129.107 |
| 92 | 10.20.129.108/30 | 10.20.129.109 – 10.20.129.110 | 10.20.129.111 |
| 93 | 10.20.129.112/30 | 10.20.129.113 – 10.20.129.114 | 10.20.129.115 |
| 94 | 10.20.129.116/30 | 10.20.129.117 – 10.20.129.118 | 10.20.129.119 |
| 95 | 10.20.129.120/30 | 10.20.129.121 – 10.20.129.122 | 10.20.129.123 |
| 96 | 10.20.129.124/30 | 10.20.129.125 – 10.20.129.126 | 10.20.129.127 |
| 97 | 10.20.129.128/30 | 10.20.129.129 – 10.20.129.130 | 10.20.129.131 |
| 98 | 10.20.129.132/30 | 10.20.129.133 – 10.20.129.134 | 10.20.129.135 |
| 99 | 10.20.129.136/30 | 10.20.129.137 – 10.20.129.138 | 10.20.129.139 |
| 100 | 10.20.129.140/30 | 10.20.129.141 – 10.20.129.142 | 10.20.129.143 |
| 101 | 10.20.129.144/30 | 10.20.129.145 – 10.20.129.146 | 10.20.129.147 |
| 102 | 10.20.129.148/30 | 10.20.129.149 – 10.20.129.150 | 10.20.129.151 |
| 103 | 10.20.129.152/30 | 10.20.129.153 – 10.20.129.154 | 10.20.129.155 |
| 104 | 10.20.129.156/30 | 10.20.129.157 – 10.20.129.158 | 10.20.129.159 |
| 105 | 10.20.129.160/30 | 10.20.129.161 – 10.20.129.162 | 10.20.129.163 |
| 106 | 10.20.129.164/30 | 10.20.129.165 – 10.20.129.166 | 10.20.129.167 |
| 107 | 10.20.129.168/30 | 10.20.129.169 – 10.20.129.170 | 10.20.129.171 |
| 108 | 10.20.129.172/30 | 10.20.129.173 – 10.20.129.174 | 10.20.129.175 |
| 109 | 10.20.129.176/30 | 10.20.129.177 – 10.20.129.178 | 10.20.129.179 |
| 110 | 10.20.129.180/30 | 10.20.129.181 – 10.20.129.182 | 10.20.129.183 |
| 111 | 10.20.129.184/30 | 10.20.129.185 – 10.20.129.186 | 10.20.129.187 |
| 112 | 10.20.129.188/30 | 10.20.129.189 – 10.20.129.190 | 10.20.129.191 |
| 113 | 10.20.129.192/30 | 10.20.129.193 – 10.20.129.194 | 10.20.129.195 |
| 114 | 10.20.129.196/30 | 10.20.129.197 – 10.20.129.198 | 10.20.129.199 |
| 115 | 10.20.129.200/30 | 10.20.129.201 – 10.20.129.202 | 10.20.129.203 |
| 116 | 10.20.129.204/30 | 10.20.129.205 – 10.20.129.206 | 10.20.129.207 |
| 117 | 10.20.129.208/30 | 10.20.129.209 – 10.20.129.210 | 10.20.129.211 |
| 118 | 10.20.129.212/30 | 10.20.129.213 – 10.20.129.214 | 10.20.129.215 |
| 119 | 10.20.129.216/30 | 10.20.129.217 – 10.20.129.218 | 10.20.129.219 |
| 120 | 10.20.129.220/30 | 10.20.129.221 – 10.20.129.222 | 10.20.129.223 |
| 121 | 10.20.129.224/30 | 10.20.129.225 – 10.20.129.226 | 10.20.129.227 |
| 122 | 10.20.129.228/30 | 10.20.129.229 – 10.20.129.230 | 10.20.129.231 |
| 123 | 10.20.129.232/30 | 10.20.129.233 – 10.20.129.234 | 10.20.129.235 |
| 124 | 10.20.129.236/30 | 10.20.129.237 – 10.20.129.238 | 10.20.129.239 |
| 125 | 10.20.129.240/30 | 10.20.129.241 – 10.20.129.242 | 10.20.129.243 |
| 126 | 10.20.129.244/30 | 10.20.129.245 – 10.20.129.246 | 10.20.129.247 |
| 127 | 10.20.129.248/30 | 10.20.129.249 – 10.20.129.250 | 10.20.129.251 |
| 128 | 10.20.129.252/30 | 10.20.129.253 – 10.20.129.254 | 10.20.129.255 |
| 129 | 10.20.130.0/30 | 10.20.130.1 – 10.20.130.2 | 10.20.130.3 |
| 130 | 10.20.130.4/30 | 10.20.130.5 – 10.20.130.6 | 10.20.130.7 |
| 131 | 10.20.130.8/30 | 10.20.130.9 – 10.20.130.10 | 10.20.130.11 |
| 132 | 10.20.130.12/30 | 10.20.130.13 – 10.20.130.14 | 10.20.130.15 |
| 133 | 10.20.130.16/30 | 10.20.130.17 – 10.20.130.18 | 10.20.130.19 |
| 134 | 10.20.130.20/30 | 10.20.130.21 – 10.20.130.22 | 10.20.130.23 |
| 135 | 10.20.130.24/30 | 10.20.130.25 – 10.20.130.26 | 10.20.130.27 |
| 136 | 10.20.130.28/30 | 10.20.130.29 – 10.20.130.30 | 10.20.130.31 |
| 137 | 10.20.130.32/30 | 10.20.130.33 – 10.20.130.34 | 10.20.130.35 |
| 138 | 10.20.130.36/30 | 10.20.130.37 – 10.20.130.38 | 10.20.130.39 |
| 139 | 10.20.130.40/30 | 10.20.130.41 – 10.20.130.42 | 10.20.130.43 |
| 140 | 10.20.130.44/30 | 10.20.130.45 – 10.20.130.46 | 10.20.130.47 |
| 141 | 10.20.130.48/30 | 10.20.130.49 – 10.20.130.50 | 10.20.130.51 |
| 142 | 10.20.130.52/30 | 10.20.130.53 – 10.20.130.54 | 10.20.130.55 |
| 143 | 10.20.130.56/30 | 10.20.130.57 – 10.20.130.58 | 10.20.130.59 |
| 144 | 10.20.130.60/30 | 10.20.130.61 – 10.20.130.62 | 10.20.130.63 |
| 145 | 10.20.130.64/30 | 10.20.130.65 – 10.20.130.66 | 10.20.130.67 |
| 146 | 10.20.130.68/30 | 10.20.130.69 – 10.20.130.70 | 10.20.130.71 |
| 147 | 10.20.130.72/30 | 10.20.130.73 – 10.20.130.74 | 10.20.130.75 |
| 148 | 10.20.130.76/30 | 10.20.130.77 – 10.20.130.78 | 10.20.130.79 |
| 149 | 10.20.130.80/30 | 10.20.130.81 – 10.20.130.82 | 10.20.130.83 |
| 150 | 10.20.130.84/30 | 10.20.130.85 – 10.20.130.86 | 10.20.130.87 |
| 151 | 10.20.130.88/30 | 10.20.130.89 – 10.20.130.90 | 10.20.130.91 |
| 152 | 10.20.130.92/30 | 10.20.130.93 – 10.20.130.94 | 10.20.130.95 |
| 153 | 10.20.130.96/30 | 10.20.130.97 – 10.20.130.98 | 10.20.130.99 |
| 154 | 10.20.130.100/30 | 10.20.130.101 – 10.20.130.102 | 10.20.130.103 |
| 155 | 10.20.130.104/30 | 10.20.130.105 – 10.20.130.106 | 10.20.130.107 |
| 156 | 10.20.130.108/30 | 10.20.130.109 – 10.20.130.110 | 10.20.130.111 |
| 157 | 10.20.130.112/30 | 10.20.130.113 – 10.20.130.114 | 10.20.130.115 |
| 158 | 10.20.130.116/30 | 10.20.130.117 – 10.20.130.118 | 10.20.130.119 |
| 159 | 10.20.130.120/30 | 10.20.130.121 – 10.20.130.122 | 10.20.130.123 |
| 160 | 10.20.130.124/30 | 10.20.130.125 – 10.20.130.126 | 10.20.130.127 |
| 161 | 10.20.130.128/30 | 10.20.130.129 – 10.20.130.130 | 10.20.130.131 |
| 162 | 10.20.130.132/30 | 10.20.130.133 – 10.20.130.134 | 10.20.130.135 |
| 163 | 10.20.130.136/30 | 10.20.130.137 – 10.20.130.138 | 10.20.130.139 |
| 164 | 10.20.130.140/30 | 10.20.130.141 – 10.20.130.142 | 10.20.130.143 |
| 165 | 10.20.130.144/30 | 10.20.130.145 – 10.20.130.146 | 10.20.130.147 |
| 166 | 10.20.130.148/30 | 10.20.130.149 – 10.20.130.150 | 10.20.130.151 |
| 167 | 10.20.130.152/30 | 10.20.130.153 – 10.20.130.154 | 10.20.130.155 |
| 168 | 10.20.130.156/30 | 10.20.130.157 – 10.20.130.158 | 10.20.130.159 |
| 169 | 10.20.130.160/30 | 10.20.130.161 – 10.20.130.162 | 10.20.130.163 |
| 170 | 10.20.130.164/30 | 10.20.130.165 – 10.20.130.166 | 10.20.130.167 |
| 171 | 10.20.130.168/30 | 10.20.130.169 – 10.20.130.170 | 10.20.130.171 |
| 172 | 10.20.130.172/30 | 10.20.130.173 – 10.20.130.174 | 10.20.130.175 |
| 173 | 10.20.130.176/30 | 10.20.130.177 – 10.20.130.178 | 10.20.130.179 |
| 174 | 10.20.130.180/30 | 10.20.130.181 – 10.20.130.182 | 10.20.130.183 |
| 175 | 10.20.130.184/30 | 10.20.130.185 – 10.20.130.186 | 10.20.130.187 |
| 176 | 10.20.130.188/30 | 10.20.130.189 – 10.20.130.190 | 10.20.130.191 |
| 177 | 10.20.130.192/30 | 10.20.130.193 – 10.20.130.194 | 10.20.130.195 |
| 178 | 10.20.130.196/30 | 10.20.130.197 – 10.20.130.198 | 10.20.130.199 |
| 179 | 10.20.130.200/30 | 10.20.130.201 – 10.20.130.202 | 10.20.130.203 |
| 180 | 10.20.130.204/30 | 10.20.130.205 – 10.20.130.206 | 10.20.130.207 |
| 181 | 10.20.130.208/30 | 10.20.130.209 – 10.20.130.210 | 10.20.130.211 |
| 182 | 10.20.130.212/30 | 10.20.130.213 – 10.20.130.214 | 10.20.130.215 |
| 183 | 10.20.130.216/30 | 10.20.130.217 – 10.20.130.218 | 10.20.130.219 |
| 184 | 10.20.130.220/30 | 10.20.130.221 – 10.20.130.222 | 10.20.130.223 |
| 185 | 10.20.130.224/30 | 10.20.130.225 – 10.20.130.226 | 10.20.130.227 |
| 186 | 10.20.130.228/30 | 10.20.130.229 – 10.20.130.230 | 10.20.130.231 |
| 187 | 10.20.130.232/30 | 10.20.130.233 – 10.20.130.234 | 10.20.130.235 |
| 188 | 10.20.130.236/30 | 10.20.130.237 – 10.20.130.238 | 10.20.130.239 |
| 189 | 10.20.130.240/30 | 10.20.130.241 – 10.20.130.242 | 10.20.130.243 |
| 190 | 10.20.130.244/30 | 10.20.130.245 – 10.20.130.246 | 10.20.130.247 |
| 191 | 10.20.130.248/30 | 10.20.130.249 – 10.20.130.250 | 10.20.130.251 |
| 192 | 10.20.130.252/30 | 10.20.130.253 – 10.20.130.254 | 10.20.130.255 |
| 193 | 10.20.131.0/30 | 10.20.131.1 – 10.20.131.2 | 10.20.131.3 |
| 194 | 10.20.131.4/30 | 10.20.131.5 – 10.20.131.6 | 10.20.131.7 |
| 195 | 10.20.131.8/30 | 10.20.131.9 – 10.20.131.10 | 10.20.131.11 |
| 196 | 10.20.131.12/30 | 10.20.131.13 – 10.20.131.14 | 10.20.131.15 |
| 197 | 10.20.131.16/30 | 10.20.131.17 – 10.20.131.18 | 10.20.131.19 |
| 198 | 10.20.131.20/30 | 10.20.131.21 – 10.20.131.22 | 10.20.131.23 |
| 199 | 10.20.131.24/30 | 10.20.131.25 – 10.20.131.26 | 10.20.131.27 |
| 200 | 10.20.131.28/30 | 10.20.131.29 – 10.20.131.30 | 10.20.131.31 |
| 201 | 10.20.131.32/30 | 10.20.131.33 – 10.20.131.34 | 10.20.131.35 |
| 202 | 10.20.131.36/30 | 10.20.131.37 – 10.20.131.38 | 10.20.131.39 |
| 203 | 10.20.131.40/30 | 10.20.131.41 – 10.20.131.42 | 10.20.131.43 |
| 204 | 10.20.131.44/30 | 10.20.131.45 – 10.20.131.46 | 10.20.131.47 |
| 205 | 10.20.131.48/30 | 10.20.131.49 – 10.20.131.50 | 10.20.131.51 |
| 206 | 10.20.131.52/30 | 10.20.131.53 – 10.20.131.54 | 10.20.131.55 |
| 207 | 10.20.131.56/30 | 10.20.131.57 – 10.20.131.58 | 10.20.131.59 |
| 208 | 10.20.131.60/30 | 10.20.131.61 – 10.20.131.62 | 10.20.131.63 |
| 209 | 10.20.131.64/30 | 10.20.131.65 – 10.20.131.66 | 10.20.131.67 |
| 210 | 10.20.131.68/30 | 10.20.131.69 – 10.20.131.70 | 10.20.131.71 |
| 211 | 10.20.131.72/30 | 10.20.131.73 – 10.20.131.74 | 10.20.131.75 |
| 212 | 10.20.131.76/30 | 10.20.131.77 – 10.20.131.78 | 10.20.131.79 |
| 213 | 10.20.131.80/30 | 10.20.131.81 – 10.20.131.82 | 10.20.131.83 |
| 214 | 10.20.131.84/30 | 10.20.131.85 – 10.20.131.86 | 10.20.131.87 |
| 215 | 10.20.131.88/30 | 10.20.131.89 – 10.20.131.90 | 10.20.131.91 |
| 216 | 10.20.131.92/30 | 10.20.131.93 – 10.20.131.94 | 10.20.131.95 |
| 217 | 10.20.131.96/30 | 10.20.131.97 – 10.20.131.98 | 10.20.131.99 |
| 218 | 10.20.131.100/30 | 10.20.131.101 – 10.20.131.102 | 10.20.131.103 |
| 219 | 10.20.131.104/30 | 10.20.131.105 – 10.20.131.106 | 10.20.131.107 |
| 220 | 10.20.131.108/30 | 10.20.131.109 – 10.20.131.110 | 10.20.131.111 |
| 221 | 10.20.131.112/30 | 10.20.131.113 – 10.20.131.114 | 10.20.131.115 |
| 222 | 10.20.131.116/30 | 10.20.131.117 – 10.20.131.118 | 10.20.131.119 |
| 223 | 10.20.131.120/30 | 10.20.131.121 – 10.20.131.122 | 10.20.131.123 |
| 224 | 10.20.131.124/30 | 10.20.131.125 – 10.20.131.126 | 10.20.131.127 |
| 225 | 10.20.131.128/30 | 10.20.131.129 – 10.20.131.130 | 10.20.131.131 |
| 226 | 10.20.131.132/30 | 10.20.131.133 – 10.20.131.134 | 10.20.131.135 |
| 227 | 10.20.131.136/30 | 10.20.131.137 – 10.20.131.138 | 10.20.131.139 |
| 228 | 10.20.131.140/30 | 10.20.131.141 – 10.20.131.142 | 10.20.131.143 |
| 229 | 10.20.131.144/30 | 10.20.131.145 – 10.20.131.146 | 10.20.131.147 |
| 230 | 10.20.131.148/30 | 10.20.131.149 – 10.20.131.150 | 10.20.131.151 |
| 231 | 10.20.131.152/30 | 10.20.131.153 – 10.20.131.154 | 10.20.131.155 |
| 232 | 10.20.131.156/30 | 10.20.131.157 – 10.20.131.158 | 10.20.131.159 |
| 233 | 10.20.131.160/30 | 10.20.131.161 – 10.20.131.162 | 10.20.131.163 |
| 234 | 10.20.131.164/30 | 10.20.131.165 – 10.20.131.166 | 10.20.131.167 |
| 235 | 10.20.131.168/30 | 10.20.131.169 – 10.20.131.170 | 10.20.131.171 |
| 236 | 10.20.131.172/30 | 10.20.131.173 – 10.20.131.174 | 10.20.131.175 |
| 237 | 10.20.131.176/30 | 10.20.131.177 – 10.20.131.178 | 10.20.131.179 |
| 238 | 10.20.131.180/30 | 10.20.131.181 – 10.20.131.182 | 10.20.131.183 |
| 239 | 10.20.131.184/30 | 10.20.131.185 – 10.20.131.186 | 10.20.131.187 |
| 240 | 10.20.131.188/30 | 10.20.131.189 – 10.20.131.190 | 10.20.131.191 |
| 241 | 10.20.131.192/30 | 10.20.131.193 – 10.20.131.194 | 10.20.131.195 |
| 242 | 10.20.131.196/30 | 10.20.131.197 – 10.20.131.198 | 10.20.131.199 |
| 243 | 10.20.131.200/30 | 10.20.131.201 – 10.20.131.202 | 10.20.131.203 |
| 244 | 10.20.131.204/30 | 10.20.131.205 – 10.20.131.206 | 10.20.131.207 |
| 245 | 10.20.131.208/30 | 10.20.131.209 – 10.20.131.210 | 10.20.131.211 |
| 246 | 10.20.131.212/30 | 10.20.131.213 – 10.20.131.214 | 10.20.131.215 |
| 247 | 10.20.131.216/30 | 10.20.131.217 – 10.20.131.218 | 10.20.131.219 |
| 248 | 10.20.131.220/30 | 10.20.131.221 – 10.20.131.222 | 10.20.131.223 |
| 249 | 10.20.131.224/30 | 10.20.131.225 – 10.20.131.226 | 10.20.131.227 |
| 250 | 10.20.131.228/30 | 10.20.131.229 – 10.20.131.230 | 10.20.131.231 |
| 251 | 10.20.131.232/30 | 10.20.131.233 – 10.20.131.234 | 10.20.131.235 |
| 252 | 10.20.131.236/30 | 10.20.131.237 – 10.20.131.238 | 10.20.131.239 |
| 253 | 10.20.131.240/30 | 10.20.131.241 – 10.20.131.242 | 10.20.131.243 |
| 254 | 10.20.131.244/30 | 10.20.131.245 – 10.20.131.246 | 10.20.131.247 |
| 255 | 10.20.131.248/30 | 10.20.131.249 – 10.20.131.250 | 10.20.131.251 |
| 256 | 10.20.131.252/30 | 10.20.131.253 – 10.20.131.254 | 10.20.131.255 |
showing 256 of 4,096
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.