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)10.166.182.0/23
network10.166.182.0/23
broadcast10.166.183.255
first host10.166.182.1
last host10.166.183.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.166.182.0/23
address00001010.10100110.10110110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100110.10110110.00000000
broadcast00001010.10100110.10110111.11111111
green = network part, grey = host part
hex0x0aa6b600
decimal178697728
reverse dns0.182.166.10.in-addr.arpa
ipv4-mapped::ffff:aa6:b600
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.166.182.0/30 | 10.166.182.1 – 10.166.182.2 | 10.166.182.3 |
| 2 | 10.166.182.4/30 | 10.166.182.5 – 10.166.182.6 | 10.166.182.7 |
| 3 | 10.166.182.8/30 | 10.166.182.9 – 10.166.182.10 | 10.166.182.11 |
| 4 | 10.166.182.12/30 | 10.166.182.13 – 10.166.182.14 | 10.166.182.15 |
| 5 | 10.166.182.16/30 | 10.166.182.17 – 10.166.182.18 | 10.166.182.19 |
| 6 | 10.166.182.20/30 | 10.166.182.21 – 10.166.182.22 | 10.166.182.23 |
| 7 | 10.166.182.24/30 | 10.166.182.25 – 10.166.182.26 | 10.166.182.27 |
| 8 | 10.166.182.28/30 | 10.166.182.29 – 10.166.182.30 | 10.166.182.31 |
| 9 | 10.166.182.32/30 | 10.166.182.33 – 10.166.182.34 | 10.166.182.35 |
| 10 | 10.166.182.36/30 | 10.166.182.37 – 10.166.182.38 | 10.166.182.39 |
| 11 | 10.166.182.40/30 | 10.166.182.41 – 10.166.182.42 | 10.166.182.43 |
| 12 | 10.166.182.44/30 | 10.166.182.45 – 10.166.182.46 | 10.166.182.47 |
| 13 | 10.166.182.48/30 | 10.166.182.49 – 10.166.182.50 | 10.166.182.51 |
| 14 | 10.166.182.52/30 | 10.166.182.53 – 10.166.182.54 | 10.166.182.55 |
| 15 | 10.166.182.56/30 | 10.166.182.57 – 10.166.182.58 | 10.166.182.59 |
| 16 | 10.166.182.60/30 | 10.166.182.61 – 10.166.182.62 | 10.166.182.63 |
| 17 | 10.166.182.64/30 | 10.166.182.65 – 10.166.182.66 | 10.166.182.67 |
| 18 | 10.166.182.68/30 | 10.166.182.69 – 10.166.182.70 | 10.166.182.71 |
| 19 | 10.166.182.72/30 | 10.166.182.73 – 10.166.182.74 | 10.166.182.75 |
| 20 | 10.166.182.76/30 | 10.166.182.77 – 10.166.182.78 | 10.166.182.79 |
| 21 | 10.166.182.80/30 | 10.166.182.81 – 10.166.182.82 | 10.166.182.83 |
| 22 | 10.166.182.84/30 | 10.166.182.85 – 10.166.182.86 | 10.166.182.87 |
| 23 | 10.166.182.88/30 | 10.166.182.89 – 10.166.182.90 | 10.166.182.91 |
| 24 | 10.166.182.92/30 | 10.166.182.93 – 10.166.182.94 | 10.166.182.95 |
| 25 | 10.166.182.96/30 | 10.166.182.97 – 10.166.182.98 | 10.166.182.99 |
| 26 | 10.166.182.100/30 | 10.166.182.101 – 10.166.182.102 | 10.166.182.103 |
| 27 | 10.166.182.104/30 | 10.166.182.105 – 10.166.182.106 | 10.166.182.107 |
| 28 | 10.166.182.108/30 | 10.166.182.109 – 10.166.182.110 | 10.166.182.111 |
| 29 | 10.166.182.112/30 | 10.166.182.113 – 10.166.182.114 | 10.166.182.115 |
| 30 | 10.166.182.116/30 | 10.166.182.117 – 10.166.182.118 | 10.166.182.119 |
| 31 | 10.166.182.120/30 | 10.166.182.121 – 10.166.182.122 | 10.166.182.123 |
| 32 | 10.166.182.124/30 | 10.166.182.125 – 10.166.182.126 | 10.166.182.127 |
| 33 | 10.166.182.128/30 | 10.166.182.129 – 10.166.182.130 | 10.166.182.131 |
| 34 | 10.166.182.132/30 | 10.166.182.133 – 10.166.182.134 | 10.166.182.135 |
| 35 | 10.166.182.136/30 | 10.166.182.137 – 10.166.182.138 | 10.166.182.139 |
| 36 | 10.166.182.140/30 | 10.166.182.141 – 10.166.182.142 | 10.166.182.143 |
| 37 | 10.166.182.144/30 | 10.166.182.145 – 10.166.182.146 | 10.166.182.147 |
| 38 | 10.166.182.148/30 | 10.166.182.149 – 10.166.182.150 | 10.166.182.151 |
| 39 | 10.166.182.152/30 | 10.166.182.153 – 10.166.182.154 | 10.166.182.155 |
| 40 | 10.166.182.156/30 | 10.166.182.157 – 10.166.182.158 | 10.166.182.159 |
| 41 | 10.166.182.160/30 | 10.166.182.161 – 10.166.182.162 | 10.166.182.163 |
| 42 | 10.166.182.164/30 | 10.166.182.165 – 10.166.182.166 | 10.166.182.167 |
| 43 | 10.166.182.168/30 | 10.166.182.169 – 10.166.182.170 | 10.166.182.171 |
| 44 | 10.166.182.172/30 | 10.166.182.173 – 10.166.182.174 | 10.166.182.175 |
| 45 | 10.166.182.176/30 | 10.166.182.177 – 10.166.182.178 | 10.166.182.179 |
| 46 | 10.166.182.180/30 | 10.166.182.181 – 10.166.182.182 | 10.166.182.183 |
| 47 | 10.166.182.184/30 | 10.166.182.185 – 10.166.182.186 | 10.166.182.187 |
| 48 | 10.166.182.188/30 | 10.166.182.189 – 10.166.182.190 | 10.166.182.191 |
| 49 | 10.166.182.192/30 | 10.166.182.193 – 10.166.182.194 | 10.166.182.195 |
| 50 | 10.166.182.196/30 | 10.166.182.197 – 10.166.182.198 | 10.166.182.199 |
| 51 | 10.166.182.200/30 | 10.166.182.201 – 10.166.182.202 | 10.166.182.203 |
| 52 | 10.166.182.204/30 | 10.166.182.205 – 10.166.182.206 | 10.166.182.207 |
| 53 | 10.166.182.208/30 | 10.166.182.209 – 10.166.182.210 | 10.166.182.211 |
| 54 | 10.166.182.212/30 | 10.166.182.213 – 10.166.182.214 | 10.166.182.215 |
| 55 | 10.166.182.216/30 | 10.166.182.217 – 10.166.182.218 | 10.166.182.219 |
| 56 | 10.166.182.220/30 | 10.166.182.221 – 10.166.182.222 | 10.166.182.223 |
| 57 | 10.166.182.224/30 | 10.166.182.225 – 10.166.182.226 | 10.166.182.227 |
| 58 | 10.166.182.228/30 | 10.166.182.229 – 10.166.182.230 | 10.166.182.231 |
| 59 | 10.166.182.232/30 | 10.166.182.233 – 10.166.182.234 | 10.166.182.235 |
| 60 | 10.166.182.236/30 | 10.166.182.237 – 10.166.182.238 | 10.166.182.239 |
| 61 | 10.166.182.240/30 | 10.166.182.241 – 10.166.182.242 | 10.166.182.243 |
| 62 | 10.166.182.244/30 | 10.166.182.245 – 10.166.182.246 | 10.166.182.247 |
| 63 | 10.166.182.248/30 | 10.166.182.249 – 10.166.182.250 | 10.166.182.251 |
| 64 | 10.166.182.252/30 | 10.166.182.253 – 10.166.182.254 | 10.166.182.255 |
| 65 | 10.166.183.0/30 | 10.166.183.1 – 10.166.183.2 | 10.166.183.3 |
| 66 | 10.166.183.4/30 | 10.166.183.5 – 10.166.183.6 | 10.166.183.7 |
| 67 | 10.166.183.8/30 | 10.166.183.9 – 10.166.183.10 | 10.166.183.11 |
| 68 | 10.166.183.12/30 | 10.166.183.13 – 10.166.183.14 | 10.166.183.15 |
| 69 | 10.166.183.16/30 | 10.166.183.17 – 10.166.183.18 | 10.166.183.19 |
| 70 | 10.166.183.20/30 | 10.166.183.21 – 10.166.183.22 | 10.166.183.23 |
| 71 | 10.166.183.24/30 | 10.166.183.25 – 10.166.183.26 | 10.166.183.27 |
| 72 | 10.166.183.28/30 | 10.166.183.29 – 10.166.183.30 | 10.166.183.31 |
| 73 | 10.166.183.32/30 | 10.166.183.33 – 10.166.183.34 | 10.166.183.35 |
| 74 | 10.166.183.36/30 | 10.166.183.37 – 10.166.183.38 | 10.166.183.39 |
| 75 | 10.166.183.40/30 | 10.166.183.41 – 10.166.183.42 | 10.166.183.43 |
| 76 | 10.166.183.44/30 | 10.166.183.45 – 10.166.183.46 | 10.166.183.47 |
| 77 | 10.166.183.48/30 | 10.166.183.49 – 10.166.183.50 | 10.166.183.51 |
| 78 | 10.166.183.52/30 | 10.166.183.53 – 10.166.183.54 | 10.166.183.55 |
| 79 | 10.166.183.56/30 | 10.166.183.57 – 10.166.183.58 | 10.166.183.59 |
| 80 | 10.166.183.60/30 | 10.166.183.61 – 10.166.183.62 | 10.166.183.63 |
| 81 | 10.166.183.64/30 | 10.166.183.65 – 10.166.183.66 | 10.166.183.67 |
| 82 | 10.166.183.68/30 | 10.166.183.69 – 10.166.183.70 | 10.166.183.71 |
| 83 | 10.166.183.72/30 | 10.166.183.73 – 10.166.183.74 | 10.166.183.75 |
| 84 | 10.166.183.76/30 | 10.166.183.77 – 10.166.183.78 | 10.166.183.79 |
| 85 | 10.166.183.80/30 | 10.166.183.81 – 10.166.183.82 | 10.166.183.83 |
| 86 | 10.166.183.84/30 | 10.166.183.85 – 10.166.183.86 | 10.166.183.87 |
| 87 | 10.166.183.88/30 | 10.166.183.89 – 10.166.183.90 | 10.166.183.91 |
| 88 | 10.166.183.92/30 | 10.166.183.93 – 10.166.183.94 | 10.166.183.95 |
| 89 | 10.166.183.96/30 | 10.166.183.97 – 10.166.183.98 | 10.166.183.99 |
| 90 | 10.166.183.100/30 | 10.166.183.101 – 10.166.183.102 | 10.166.183.103 |
| 91 | 10.166.183.104/30 | 10.166.183.105 – 10.166.183.106 | 10.166.183.107 |
| 92 | 10.166.183.108/30 | 10.166.183.109 – 10.166.183.110 | 10.166.183.111 |
| 93 | 10.166.183.112/30 | 10.166.183.113 – 10.166.183.114 | 10.166.183.115 |
| 94 | 10.166.183.116/30 | 10.166.183.117 – 10.166.183.118 | 10.166.183.119 |
| 95 | 10.166.183.120/30 | 10.166.183.121 – 10.166.183.122 | 10.166.183.123 |
| 96 | 10.166.183.124/30 | 10.166.183.125 – 10.166.183.126 | 10.166.183.127 |
| 97 | 10.166.183.128/30 | 10.166.183.129 – 10.166.183.130 | 10.166.183.131 |
| 98 | 10.166.183.132/30 | 10.166.183.133 – 10.166.183.134 | 10.166.183.135 |
| 99 | 10.166.183.136/30 | 10.166.183.137 – 10.166.183.138 | 10.166.183.139 |
| 100 | 10.166.183.140/30 | 10.166.183.141 – 10.166.183.142 | 10.166.183.143 |
| 101 | 10.166.183.144/30 | 10.166.183.145 – 10.166.183.146 | 10.166.183.147 |
| 102 | 10.166.183.148/30 | 10.166.183.149 – 10.166.183.150 | 10.166.183.151 |
| 103 | 10.166.183.152/30 | 10.166.183.153 – 10.166.183.154 | 10.166.183.155 |
| 104 | 10.166.183.156/30 | 10.166.183.157 – 10.166.183.158 | 10.166.183.159 |
| 105 | 10.166.183.160/30 | 10.166.183.161 – 10.166.183.162 | 10.166.183.163 |
| 106 | 10.166.183.164/30 | 10.166.183.165 – 10.166.183.166 | 10.166.183.167 |
| 107 | 10.166.183.168/30 | 10.166.183.169 – 10.166.183.170 | 10.166.183.171 |
| 108 | 10.166.183.172/30 | 10.166.183.173 – 10.166.183.174 | 10.166.183.175 |
| 109 | 10.166.183.176/30 | 10.166.183.177 – 10.166.183.178 | 10.166.183.179 |
| 110 | 10.166.183.180/30 | 10.166.183.181 – 10.166.183.182 | 10.166.183.183 |
| 111 | 10.166.183.184/30 | 10.166.183.185 – 10.166.183.186 | 10.166.183.187 |
| 112 | 10.166.183.188/30 | 10.166.183.189 – 10.166.183.190 | 10.166.183.191 |
| 113 | 10.166.183.192/30 | 10.166.183.193 – 10.166.183.194 | 10.166.183.195 |
| 114 | 10.166.183.196/30 | 10.166.183.197 – 10.166.183.198 | 10.166.183.199 |
| 115 | 10.166.183.200/30 | 10.166.183.201 – 10.166.183.202 | 10.166.183.203 |
| 116 | 10.166.183.204/30 | 10.166.183.205 – 10.166.183.206 | 10.166.183.207 |
| 117 | 10.166.183.208/30 | 10.166.183.209 – 10.166.183.210 | 10.166.183.211 |
| 118 | 10.166.183.212/30 | 10.166.183.213 – 10.166.183.214 | 10.166.183.215 |
| 119 | 10.166.183.216/30 | 10.166.183.217 – 10.166.183.218 | 10.166.183.219 |
| 120 | 10.166.183.220/30 | 10.166.183.221 – 10.166.183.222 | 10.166.183.223 |
| 121 | 10.166.183.224/30 | 10.166.183.225 – 10.166.183.226 | 10.166.183.227 |
| 122 | 10.166.183.228/30 | 10.166.183.229 – 10.166.183.230 | 10.166.183.231 |
| 123 | 10.166.183.232/30 | 10.166.183.233 – 10.166.183.234 | 10.166.183.235 |
| 124 | 10.166.183.236/30 | 10.166.183.237 – 10.166.183.238 | 10.166.183.239 |
| 125 | 10.166.183.240/30 | 10.166.183.241 – 10.166.183.242 | 10.166.183.243 |
| 126 | 10.166.183.244/30 | 10.166.183.245 – 10.166.183.246 | 10.166.183.247 |
| 127 | 10.166.183.248/30 | 10.166.183.249 – 10.166.183.250 | 10.166.183.251 |
| 128 | 10.166.183.252/30 | 10.166.183.253 – 10.166.183.254 | 10.166.183.255 |
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.