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)10.2.206.0/23
network10.2.206.0/23
broadcast10.2.207.255
first host10.2.206.1
last host10.2.207.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.2.206.0/23
address00001010.00000010.11001110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000010.11001110.00000000
broadcast00001010.00000010.11001111.11111111
green = network part, grey = host part
hex0x0a02ce00
decimal167955968
reverse dns0.206.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:ce00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.2.206.0/30 | 10.2.206.1 – 10.2.206.2 | 10.2.206.3 |
| 2 | 10.2.206.4/30 | 10.2.206.5 – 10.2.206.6 | 10.2.206.7 |
| 3 | 10.2.206.8/30 | 10.2.206.9 – 10.2.206.10 | 10.2.206.11 |
| 4 | 10.2.206.12/30 | 10.2.206.13 – 10.2.206.14 | 10.2.206.15 |
| 5 | 10.2.206.16/30 | 10.2.206.17 – 10.2.206.18 | 10.2.206.19 |
| 6 | 10.2.206.20/30 | 10.2.206.21 – 10.2.206.22 | 10.2.206.23 |
| 7 | 10.2.206.24/30 | 10.2.206.25 – 10.2.206.26 | 10.2.206.27 |
| 8 | 10.2.206.28/30 | 10.2.206.29 – 10.2.206.30 | 10.2.206.31 |
| 9 | 10.2.206.32/30 | 10.2.206.33 – 10.2.206.34 | 10.2.206.35 |
| 10 | 10.2.206.36/30 | 10.2.206.37 – 10.2.206.38 | 10.2.206.39 |
| 11 | 10.2.206.40/30 | 10.2.206.41 – 10.2.206.42 | 10.2.206.43 |
| 12 | 10.2.206.44/30 | 10.2.206.45 – 10.2.206.46 | 10.2.206.47 |
| 13 | 10.2.206.48/30 | 10.2.206.49 – 10.2.206.50 | 10.2.206.51 |
| 14 | 10.2.206.52/30 | 10.2.206.53 – 10.2.206.54 | 10.2.206.55 |
| 15 | 10.2.206.56/30 | 10.2.206.57 – 10.2.206.58 | 10.2.206.59 |
| 16 | 10.2.206.60/30 | 10.2.206.61 – 10.2.206.62 | 10.2.206.63 |
| 17 | 10.2.206.64/30 | 10.2.206.65 – 10.2.206.66 | 10.2.206.67 |
| 18 | 10.2.206.68/30 | 10.2.206.69 – 10.2.206.70 | 10.2.206.71 |
| 19 | 10.2.206.72/30 | 10.2.206.73 – 10.2.206.74 | 10.2.206.75 |
| 20 | 10.2.206.76/30 | 10.2.206.77 – 10.2.206.78 | 10.2.206.79 |
| 21 | 10.2.206.80/30 | 10.2.206.81 – 10.2.206.82 | 10.2.206.83 |
| 22 | 10.2.206.84/30 | 10.2.206.85 – 10.2.206.86 | 10.2.206.87 |
| 23 | 10.2.206.88/30 | 10.2.206.89 – 10.2.206.90 | 10.2.206.91 |
| 24 | 10.2.206.92/30 | 10.2.206.93 – 10.2.206.94 | 10.2.206.95 |
| 25 | 10.2.206.96/30 | 10.2.206.97 – 10.2.206.98 | 10.2.206.99 |
| 26 | 10.2.206.100/30 | 10.2.206.101 – 10.2.206.102 | 10.2.206.103 |
| 27 | 10.2.206.104/30 | 10.2.206.105 – 10.2.206.106 | 10.2.206.107 |
| 28 | 10.2.206.108/30 | 10.2.206.109 – 10.2.206.110 | 10.2.206.111 |
| 29 | 10.2.206.112/30 | 10.2.206.113 – 10.2.206.114 | 10.2.206.115 |
| 30 | 10.2.206.116/30 | 10.2.206.117 – 10.2.206.118 | 10.2.206.119 |
| 31 | 10.2.206.120/30 | 10.2.206.121 – 10.2.206.122 | 10.2.206.123 |
| 32 | 10.2.206.124/30 | 10.2.206.125 – 10.2.206.126 | 10.2.206.127 |
| 33 | 10.2.206.128/30 | 10.2.206.129 – 10.2.206.130 | 10.2.206.131 |
| 34 | 10.2.206.132/30 | 10.2.206.133 – 10.2.206.134 | 10.2.206.135 |
| 35 | 10.2.206.136/30 | 10.2.206.137 – 10.2.206.138 | 10.2.206.139 |
| 36 | 10.2.206.140/30 | 10.2.206.141 – 10.2.206.142 | 10.2.206.143 |
| 37 | 10.2.206.144/30 | 10.2.206.145 – 10.2.206.146 | 10.2.206.147 |
| 38 | 10.2.206.148/30 | 10.2.206.149 – 10.2.206.150 | 10.2.206.151 |
| 39 | 10.2.206.152/30 | 10.2.206.153 – 10.2.206.154 | 10.2.206.155 |
| 40 | 10.2.206.156/30 | 10.2.206.157 – 10.2.206.158 | 10.2.206.159 |
| 41 | 10.2.206.160/30 | 10.2.206.161 – 10.2.206.162 | 10.2.206.163 |
| 42 | 10.2.206.164/30 | 10.2.206.165 – 10.2.206.166 | 10.2.206.167 |
| 43 | 10.2.206.168/30 | 10.2.206.169 – 10.2.206.170 | 10.2.206.171 |
| 44 | 10.2.206.172/30 | 10.2.206.173 – 10.2.206.174 | 10.2.206.175 |
| 45 | 10.2.206.176/30 | 10.2.206.177 – 10.2.206.178 | 10.2.206.179 |
| 46 | 10.2.206.180/30 | 10.2.206.181 – 10.2.206.182 | 10.2.206.183 |
| 47 | 10.2.206.184/30 | 10.2.206.185 – 10.2.206.186 | 10.2.206.187 |
| 48 | 10.2.206.188/30 | 10.2.206.189 – 10.2.206.190 | 10.2.206.191 |
| 49 | 10.2.206.192/30 | 10.2.206.193 – 10.2.206.194 | 10.2.206.195 |
| 50 | 10.2.206.196/30 | 10.2.206.197 – 10.2.206.198 | 10.2.206.199 |
| 51 | 10.2.206.200/30 | 10.2.206.201 – 10.2.206.202 | 10.2.206.203 |
| 52 | 10.2.206.204/30 | 10.2.206.205 – 10.2.206.206 | 10.2.206.207 |
| 53 | 10.2.206.208/30 | 10.2.206.209 – 10.2.206.210 | 10.2.206.211 |
| 54 | 10.2.206.212/30 | 10.2.206.213 – 10.2.206.214 | 10.2.206.215 |
| 55 | 10.2.206.216/30 | 10.2.206.217 – 10.2.206.218 | 10.2.206.219 |
| 56 | 10.2.206.220/30 | 10.2.206.221 – 10.2.206.222 | 10.2.206.223 |
| 57 | 10.2.206.224/30 | 10.2.206.225 – 10.2.206.226 | 10.2.206.227 |
| 58 | 10.2.206.228/30 | 10.2.206.229 – 10.2.206.230 | 10.2.206.231 |
| 59 | 10.2.206.232/30 | 10.2.206.233 – 10.2.206.234 | 10.2.206.235 |
| 60 | 10.2.206.236/30 | 10.2.206.237 – 10.2.206.238 | 10.2.206.239 |
| 61 | 10.2.206.240/30 | 10.2.206.241 – 10.2.206.242 | 10.2.206.243 |
| 62 | 10.2.206.244/30 | 10.2.206.245 – 10.2.206.246 | 10.2.206.247 |
| 63 | 10.2.206.248/30 | 10.2.206.249 – 10.2.206.250 | 10.2.206.251 |
| 64 | 10.2.206.252/30 | 10.2.206.253 – 10.2.206.254 | 10.2.206.255 |
| 65 | 10.2.207.0/30 | 10.2.207.1 – 10.2.207.2 | 10.2.207.3 |
| 66 | 10.2.207.4/30 | 10.2.207.5 – 10.2.207.6 | 10.2.207.7 |
| 67 | 10.2.207.8/30 | 10.2.207.9 – 10.2.207.10 | 10.2.207.11 |
| 68 | 10.2.207.12/30 | 10.2.207.13 – 10.2.207.14 | 10.2.207.15 |
| 69 | 10.2.207.16/30 | 10.2.207.17 – 10.2.207.18 | 10.2.207.19 |
| 70 | 10.2.207.20/30 | 10.2.207.21 – 10.2.207.22 | 10.2.207.23 |
| 71 | 10.2.207.24/30 | 10.2.207.25 – 10.2.207.26 | 10.2.207.27 |
| 72 | 10.2.207.28/30 | 10.2.207.29 – 10.2.207.30 | 10.2.207.31 |
| 73 | 10.2.207.32/30 | 10.2.207.33 – 10.2.207.34 | 10.2.207.35 |
| 74 | 10.2.207.36/30 | 10.2.207.37 – 10.2.207.38 | 10.2.207.39 |
| 75 | 10.2.207.40/30 | 10.2.207.41 – 10.2.207.42 | 10.2.207.43 |
| 76 | 10.2.207.44/30 | 10.2.207.45 – 10.2.207.46 | 10.2.207.47 |
| 77 | 10.2.207.48/30 | 10.2.207.49 – 10.2.207.50 | 10.2.207.51 |
| 78 | 10.2.207.52/30 | 10.2.207.53 – 10.2.207.54 | 10.2.207.55 |
| 79 | 10.2.207.56/30 | 10.2.207.57 – 10.2.207.58 | 10.2.207.59 |
| 80 | 10.2.207.60/30 | 10.2.207.61 – 10.2.207.62 | 10.2.207.63 |
| 81 | 10.2.207.64/30 | 10.2.207.65 – 10.2.207.66 | 10.2.207.67 |
| 82 | 10.2.207.68/30 | 10.2.207.69 – 10.2.207.70 | 10.2.207.71 |
| 83 | 10.2.207.72/30 | 10.2.207.73 – 10.2.207.74 | 10.2.207.75 |
| 84 | 10.2.207.76/30 | 10.2.207.77 – 10.2.207.78 | 10.2.207.79 |
| 85 | 10.2.207.80/30 | 10.2.207.81 – 10.2.207.82 | 10.2.207.83 |
| 86 | 10.2.207.84/30 | 10.2.207.85 – 10.2.207.86 | 10.2.207.87 |
| 87 | 10.2.207.88/30 | 10.2.207.89 – 10.2.207.90 | 10.2.207.91 |
| 88 | 10.2.207.92/30 | 10.2.207.93 – 10.2.207.94 | 10.2.207.95 |
| 89 | 10.2.207.96/30 | 10.2.207.97 – 10.2.207.98 | 10.2.207.99 |
| 90 | 10.2.207.100/30 | 10.2.207.101 – 10.2.207.102 | 10.2.207.103 |
| 91 | 10.2.207.104/30 | 10.2.207.105 – 10.2.207.106 | 10.2.207.107 |
| 92 | 10.2.207.108/30 | 10.2.207.109 – 10.2.207.110 | 10.2.207.111 |
| 93 | 10.2.207.112/30 | 10.2.207.113 – 10.2.207.114 | 10.2.207.115 |
| 94 | 10.2.207.116/30 | 10.2.207.117 – 10.2.207.118 | 10.2.207.119 |
| 95 | 10.2.207.120/30 | 10.2.207.121 – 10.2.207.122 | 10.2.207.123 |
| 96 | 10.2.207.124/30 | 10.2.207.125 – 10.2.207.126 | 10.2.207.127 |
| 97 | 10.2.207.128/30 | 10.2.207.129 – 10.2.207.130 | 10.2.207.131 |
| 98 | 10.2.207.132/30 | 10.2.207.133 – 10.2.207.134 | 10.2.207.135 |
| 99 | 10.2.207.136/30 | 10.2.207.137 – 10.2.207.138 | 10.2.207.139 |
| 100 | 10.2.207.140/30 | 10.2.207.141 – 10.2.207.142 | 10.2.207.143 |
| 101 | 10.2.207.144/30 | 10.2.207.145 – 10.2.207.146 | 10.2.207.147 |
| 102 | 10.2.207.148/30 | 10.2.207.149 – 10.2.207.150 | 10.2.207.151 |
| 103 | 10.2.207.152/30 | 10.2.207.153 – 10.2.207.154 | 10.2.207.155 |
| 104 | 10.2.207.156/30 | 10.2.207.157 – 10.2.207.158 | 10.2.207.159 |
| 105 | 10.2.207.160/30 | 10.2.207.161 – 10.2.207.162 | 10.2.207.163 |
| 106 | 10.2.207.164/30 | 10.2.207.165 – 10.2.207.166 | 10.2.207.167 |
| 107 | 10.2.207.168/30 | 10.2.207.169 – 10.2.207.170 | 10.2.207.171 |
| 108 | 10.2.207.172/30 | 10.2.207.173 – 10.2.207.174 | 10.2.207.175 |
| 109 | 10.2.207.176/30 | 10.2.207.177 – 10.2.207.178 | 10.2.207.179 |
| 110 | 10.2.207.180/30 | 10.2.207.181 – 10.2.207.182 | 10.2.207.183 |
| 111 | 10.2.207.184/30 | 10.2.207.185 – 10.2.207.186 | 10.2.207.187 |
| 112 | 10.2.207.188/30 | 10.2.207.189 – 10.2.207.190 | 10.2.207.191 |
| 113 | 10.2.207.192/30 | 10.2.207.193 – 10.2.207.194 | 10.2.207.195 |
| 114 | 10.2.207.196/30 | 10.2.207.197 – 10.2.207.198 | 10.2.207.199 |
| 115 | 10.2.207.200/30 | 10.2.207.201 – 10.2.207.202 | 10.2.207.203 |
| 116 | 10.2.207.204/30 | 10.2.207.205 – 10.2.207.206 | 10.2.207.207 |
| 117 | 10.2.207.208/30 | 10.2.207.209 – 10.2.207.210 | 10.2.207.211 |
| 118 | 10.2.207.212/30 | 10.2.207.213 – 10.2.207.214 | 10.2.207.215 |
| 119 | 10.2.207.216/30 | 10.2.207.217 – 10.2.207.218 | 10.2.207.219 |
| 120 | 10.2.207.220/30 | 10.2.207.221 – 10.2.207.222 | 10.2.207.223 |
| 121 | 10.2.207.224/30 | 10.2.207.225 – 10.2.207.226 | 10.2.207.227 |
| 122 | 10.2.207.228/30 | 10.2.207.229 – 10.2.207.230 | 10.2.207.231 |
| 123 | 10.2.207.232/30 | 10.2.207.233 – 10.2.207.234 | 10.2.207.235 |
| 124 | 10.2.207.236/30 | 10.2.207.237 – 10.2.207.238 | 10.2.207.239 |
| 125 | 10.2.207.240/30 | 10.2.207.241 – 10.2.207.242 | 10.2.207.243 |
| 126 | 10.2.207.244/30 | 10.2.207.245 – 10.2.207.246 | 10.2.207.247 |
| 127 | 10.2.207.248/30 | 10.2.207.249 – 10.2.207.250 | 10.2.207.251 |
| 128 | 10.2.207.252/30 | 10.2.207.253 – 10.2.207.254 | 10.2.207.255 |
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 /23 |
|---|---|---|---|---|
| /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 | - |
| /22 | 255.255.252.0 | 1,024 | 1,022 | - |
| /23 | 255.255.254.0 | 512 | 510 | 1 |
| /24 | 255.255.255.0 | 256 | 254 | 2 split → |
| /25 | 255.255.255.128 | 128 | 126 | 4 split → |
| /26 | 255.255.255.192 | 64 | 62 | 8 split → |
| /27 | 255.255.255.224 | 32 | 30 | 16 split → |
| /28 | 255.255.255.240 | 16 | 14 | 32 split → |
| /29 | 255.255.255.248 | 8 | 6 | 64 split → |
| /30 | 255.255.255.252 | 4 | 2 | 128 split → |
| /31 | 255.255.255.254 | 2 | 2 | 256 split → |
| /32 | 255.255.255.255 | 1 | 1 | 512 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.