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)10.167.170.0/23
network10.167.170.0/23
broadcast10.167.171.255
first host10.167.170.1
last host10.167.171.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.170.0/23
address00001010.10100111.10101010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.10101010.00000000
broadcast00001010.10100111.10101011.11111111
green = network part, grey = host part
hex0x0aa7aa00
decimal178760192
reverse dns0.170.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:aa00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.167.170.0/30 | 10.167.170.1 – 10.167.170.2 | 10.167.170.3 |
| 2 | 10.167.170.4/30 | 10.167.170.5 – 10.167.170.6 | 10.167.170.7 |
| 3 | 10.167.170.8/30 | 10.167.170.9 – 10.167.170.10 | 10.167.170.11 |
| 4 | 10.167.170.12/30 | 10.167.170.13 – 10.167.170.14 | 10.167.170.15 |
| 5 | 10.167.170.16/30 | 10.167.170.17 – 10.167.170.18 | 10.167.170.19 |
| 6 | 10.167.170.20/30 | 10.167.170.21 – 10.167.170.22 | 10.167.170.23 |
| 7 | 10.167.170.24/30 | 10.167.170.25 – 10.167.170.26 | 10.167.170.27 |
| 8 | 10.167.170.28/30 | 10.167.170.29 – 10.167.170.30 | 10.167.170.31 |
| 9 | 10.167.170.32/30 | 10.167.170.33 – 10.167.170.34 | 10.167.170.35 |
| 10 | 10.167.170.36/30 | 10.167.170.37 – 10.167.170.38 | 10.167.170.39 |
| 11 | 10.167.170.40/30 | 10.167.170.41 – 10.167.170.42 | 10.167.170.43 |
| 12 | 10.167.170.44/30 | 10.167.170.45 – 10.167.170.46 | 10.167.170.47 |
| 13 | 10.167.170.48/30 | 10.167.170.49 – 10.167.170.50 | 10.167.170.51 |
| 14 | 10.167.170.52/30 | 10.167.170.53 – 10.167.170.54 | 10.167.170.55 |
| 15 | 10.167.170.56/30 | 10.167.170.57 – 10.167.170.58 | 10.167.170.59 |
| 16 | 10.167.170.60/30 | 10.167.170.61 – 10.167.170.62 | 10.167.170.63 |
| 17 | 10.167.170.64/30 | 10.167.170.65 – 10.167.170.66 | 10.167.170.67 |
| 18 | 10.167.170.68/30 | 10.167.170.69 – 10.167.170.70 | 10.167.170.71 |
| 19 | 10.167.170.72/30 | 10.167.170.73 – 10.167.170.74 | 10.167.170.75 |
| 20 | 10.167.170.76/30 | 10.167.170.77 – 10.167.170.78 | 10.167.170.79 |
| 21 | 10.167.170.80/30 | 10.167.170.81 – 10.167.170.82 | 10.167.170.83 |
| 22 | 10.167.170.84/30 | 10.167.170.85 – 10.167.170.86 | 10.167.170.87 |
| 23 | 10.167.170.88/30 | 10.167.170.89 – 10.167.170.90 | 10.167.170.91 |
| 24 | 10.167.170.92/30 | 10.167.170.93 – 10.167.170.94 | 10.167.170.95 |
| 25 | 10.167.170.96/30 | 10.167.170.97 – 10.167.170.98 | 10.167.170.99 |
| 26 | 10.167.170.100/30 | 10.167.170.101 – 10.167.170.102 | 10.167.170.103 |
| 27 | 10.167.170.104/30 | 10.167.170.105 – 10.167.170.106 | 10.167.170.107 |
| 28 | 10.167.170.108/30 | 10.167.170.109 – 10.167.170.110 | 10.167.170.111 |
| 29 | 10.167.170.112/30 | 10.167.170.113 – 10.167.170.114 | 10.167.170.115 |
| 30 | 10.167.170.116/30 | 10.167.170.117 – 10.167.170.118 | 10.167.170.119 |
| 31 | 10.167.170.120/30 | 10.167.170.121 – 10.167.170.122 | 10.167.170.123 |
| 32 | 10.167.170.124/30 | 10.167.170.125 – 10.167.170.126 | 10.167.170.127 |
| 33 | 10.167.170.128/30 | 10.167.170.129 – 10.167.170.130 | 10.167.170.131 |
| 34 | 10.167.170.132/30 | 10.167.170.133 – 10.167.170.134 | 10.167.170.135 |
| 35 | 10.167.170.136/30 | 10.167.170.137 – 10.167.170.138 | 10.167.170.139 |
| 36 | 10.167.170.140/30 | 10.167.170.141 – 10.167.170.142 | 10.167.170.143 |
| 37 | 10.167.170.144/30 | 10.167.170.145 – 10.167.170.146 | 10.167.170.147 |
| 38 | 10.167.170.148/30 | 10.167.170.149 – 10.167.170.150 | 10.167.170.151 |
| 39 | 10.167.170.152/30 | 10.167.170.153 – 10.167.170.154 | 10.167.170.155 |
| 40 | 10.167.170.156/30 | 10.167.170.157 – 10.167.170.158 | 10.167.170.159 |
| 41 | 10.167.170.160/30 | 10.167.170.161 – 10.167.170.162 | 10.167.170.163 |
| 42 | 10.167.170.164/30 | 10.167.170.165 – 10.167.170.166 | 10.167.170.167 |
| 43 | 10.167.170.168/30 | 10.167.170.169 – 10.167.170.170 | 10.167.170.171 |
| 44 | 10.167.170.172/30 | 10.167.170.173 – 10.167.170.174 | 10.167.170.175 |
| 45 | 10.167.170.176/30 | 10.167.170.177 – 10.167.170.178 | 10.167.170.179 |
| 46 | 10.167.170.180/30 | 10.167.170.181 – 10.167.170.182 | 10.167.170.183 |
| 47 | 10.167.170.184/30 | 10.167.170.185 – 10.167.170.186 | 10.167.170.187 |
| 48 | 10.167.170.188/30 | 10.167.170.189 – 10.167.170.190 | 10.167.170.191 |
| 49 | 10.167.170.192/30 | 10.167.170.193 – 10.167.170.194 | 10.167.170.195 |
| 50 | 10.167.170.196/30 | 10.167.170.197 – 10.167.170.198 | 10.167.170.199 |
| 51 | 10.167.170.200/30 | 10.167.170.201 – 10.167.170.202 | 10.167.170.203 |
| 52 | 10.167.170.204/30 | 10.167.170.205 – 10.167.170.206 | 10.167.170.207 |
| 53 | 10.167.170.208/30 | 10.167.170.209 – 10.167.170.210 | 10.167.170.211 |
| 54 | 10.167.170.212/30 | 10.167.170.213 – 10.167.170.214 | 10.167.170.215 |
| 55 | 10.167.170.216/30 | 10.167.170.217 – 10.167.170.218 | 10.167.170.219 |
| 56 | 10.167.170.220/30 | 10.167.170.221 – 10.167.170.222 | 10.167.170.223 |
| 57 | 10.167.170.224/30 | 10.167.170.225 – 10.167.170.226 | 10.167.170.227 |
| 58 | 10.167.170.228/30 | 10.167.170.229 – 10.167.170.230 | 10.167.170.231 |
| 59 | 10.167.170.232/30 | 10.167.170.233 – 10.167.170.234 | 10.167.170.235 |
| 60 | 10.167.170.236/30 | 10.167.170.237 – 10.167.170.238 | 10.167.170.239 |
| 61 | 10.167.170.240/30 | 10.167.170.241 – 10.167.170.242 | 10.167.170.243 |
| 62 | 10.167.170.244/30 | 10.167.170.245 – 10.167.170.246 | 10.167.170.247 |
| 63 | 10.167.170.248/30 | 10.167.170.249 – 10.167.170.250 | 10.167.170.251 |
| 64 | 10.167.170.252/30 | 10.167.170.253 – 10.167.170.254 | 10.167.170.255 |
| 65 | 10.167.171.0/30 | 10.167.171.1 – 10.167.171.2 | 10.167.171.3 |
| 66 | 10.167.171.4/30 | 10.167.171.5 – 10.167.171.6 | 10.167.171.7 |
| 67 | 10.167.171.8/30 | 10.167.171.9 – 10.167.171.10 | 10.167.171.11 |
| 68 | 10.167.171.12/30 | 10.167.171.13 – 10.167.171.14 | 10.167.171.15 |
| 69 | 10.167.171.16/30 | 10.167.171.17 – 10.167.171.18 | 10.167.171.19 |
| 70 | 10.167.171.20/30 | 10.167.171.21 – 10.167.171.22 | 10.167.171.23 |
| 71 | 10.167.171.24/30 | 10.167.171.25 – 10.167.171.26 | 10.167.171.27 |
| 72 | 10.167.171.28/30 | 10.167.171.29 – 10.167.171.30 | 10.167.171.31 |
| 73 | 10.167.171.32/30 | 10.167.171.33 – 10.167.171.34 | 10.167.171.35 |
| 74 | 10.167.171.36/30 | 10.167.171.37 – 10.167.171.38 | 10.167.171.39 |
| 75 | 10.167.171.40/30 | 10.167.171.41 – 10.167.171.42 | 10.167.171.43 |
| 76 | 10.167.171.44/30 | 10.167.171.45 – 10.167.171.46 | 10.167.171.47 |
| 77 | 10.167.171.48/30 | 10.167.171.49 – 10.167.171.50 | 10.167.171.51 |
| 78 | 10.167.171.52/30 | 10.167.171.53 – 10.167.171.54 | 10.167.171.55 |
| 79 | 10.167.171.56/30 | 10.167.171.57 – 10.167.171.58 | 10.167.171.59 |
| 80 | 10.167.171.60/30 | 10.167.171.61 – 10.167.171.62 | 10.167.171.63 |
| 81 | 10.167.171.64/30 | 10.167.171.65 – 10.167.171.66 | 10.167.171.67 |
| 82 | 10.167.171.68/30 | 10.167.171.69 – 10.167.171.70 | 10.167.171.71 |
| 83 | 10.167.171.72/30 | 10.167.171.73 – 10.167.171.74 | 10.167.171.75 |
| 84 | 10.167.171.76/30 | 10.167.171.77 – 10.167.171.78 | 10.167.171.79 |
| 85 | 10.167.171.80/30 | 10.167.171.81 – 10.167.171.82 | 10.167.171.83 |
| 86 | 10.167.171.84/30 | 10.167.171.85 – 10.167.171.86 | 10.167.171.87 |
| 87 | 10.167.171.88/30 | 10.167.171.89 – 10.167.171.90 | 10.167.171.91 |
| 88 | 10.167.171.92/30 | 10.167.171.93 – 10.167.171.94 | 10.167.171.95 |
| 89 | 10.167.171.96/30 | 10.167.171.97 – 10.167.171.98 | 10.167.171.99 |
| 90 | 10.167.171.100/30 | 10.167.171.101 – 10.167.171.102 | 10.167.171.103 |
| 91 | 10.167.171.104/30 | 10.167.171.105 – 10.167.171.106 | 10.167.171.107 |
| 92 | 10.167.171.108/30 | 10.167.171.109 – 10.167.171.110 | 10.167.171.111 |
| 93 | 10.167.171.112/30 | 10.167.171.113 – 10.167.171.114 | 10.167.171.115 |
| 94 | 10.167.171.116/30 | 10.167.171.117 – 10.167.171.118 | 10.167.171.119 |
| 95 | 10.167.171.120/30 | 10.167.171.121 – 10.167.171.122 | 10.167.171.123 |
| 96 | 10.167.171.124/30 | 10.167.171.125 – 10.167.171.126 | 10.167.171.127 |
| 97 | 10.167.171.128/30 | 10.167.171.129 – 10.167.171.130 | 10.167.171.131 |
| 98 | 10.167.171.132/30 | 10.167.171.133 – 10.167.171.134 | 10.167.171.135 |
| 99 | 10.167.171.136/30 | 10.167.171.137 – 10.167.171.138 | 10.167.171.139 |
| 100 | 10.167.171.140/30 | 10.167.171.141 – 10.167.171.142 | 10.167.171.143 |
| 101 | 10.167.171.144/30 | 10.167.171.145 – 10.167.171.146 | 10.167.171.147 |
| 102 | 10.167.171.148/30 | 10.167.171.149 – 10.167.171.150 | 10.167.171.151 |
| 103 | 10.167.171.152/30 | 10.167.171.153 – 10.167.171.154 | 10.167.171.155 |
| 104 | 10.167.171.156/30 | 10.167.171.157 – 10.167.171.158 | 10.167.171.159 |
| 105 | 10.167.171.160/30 | 10.167.171.161 – 10.167.171.162 | 10.167.171.163 |
| 106 | 10.167.171.164/30 | 10.167.171.165 – 10.167.171.166 | 10.167.171.167 |
| 107 | 10.167.171.168/30 | 10.167.171.169 – 10.167.171.170 | 10.167.171.171 |
| 108 | 10.167.171.172/30 | 10.167.171.173 – 10.167.171.174 | 10.167.171.175 |
| 109 | 10.167.171.176/30 | 10.167.171.177 – 10.167.171.178 | 10.167.171.179 |
| 110 | 10.167.171.180/30 | 10.167.171.181 – 10.167.171.182 | 10.167.171.183 |
| 111 | 10.167.171.184/30 | 10.167.171.185 – 10.167.171.186 | 10.167.171.187 |
| 112 | 10.167.171.188/30 | 10.167.171.189 – 10.167.171.190 | 10.167.171.191 |
| 113 | 10.167.171.192/30 | 10.167.171.193 – 10.167.171.194 | 10.167.171.195 |
| 114 | 10.167.171.196/30 | 10.167.171.197 – 10.167.171.198 | 10.167.171.199 |
| 115 | 10.167.171.200/30 | 10.167.171.201 – 10.167.171.202 | 10.167.171.203 |
| 116 | 10.167.171.204/30 | 10.167.171.205 – 10.167.171.206 | 10.167.171.207 |
| 117 | 10.167.171.208/30 | 10.167.171.209 – 10.167.171.210 | 10.167.171.211 |
| 118 | 10.167.171.212/30 | 10.167.171.213 – 10.167.171.214 | 10.167.171.215 |
| 119 | 10.167.171.216/30 | 10.167.171.217 – 10.167.171.218 | 10.167.171.219 |
| 120 | 10.167.171.220/30 | 10.167.171.221 – 10.167.171.222 | 10.167.171.223 |
| 121 | 10.167.171.224/30 | 10.167.171.225 – 10.167.171.226 | 10.167.171.227 |
| 122 | 10.167.171.228/30 | 10.167.171.229 – 10.167.171.230 | 10.167.171.231 |
| 123 | 10.167.171.232/30 | 10.167.171.233 – 10.167.171.234 | 10.167.171.235 |
| 124 | 10.167.171.236/30 | 10.167.171.237 – 10.167.171.238 | 10.167.171.239 |
| 125 | 10.167.171.240/30 | 10.167.171.241 – 10.167.171.242 | 10.167.171.243 |
| 126 | 10.167.171.244/30 | 10.167.171.245 – 10.167.171.246 | 10.167.171.247 |
| 127 | 10.167.171.248/30 | 10.167.171.249 – 10.167.171.250 | 10.167.171.251 |
| 128 | 10.167.171.252/30 | 10.167.171.253 – 10.167.171.254 | 10.167.171.255 |
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.