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)10.167.240.0/23
network10.167.240.0/23
broadcast10.167.241.255
first host10.167.240.1
last host10.167.241.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.240.0/23
address00001010.10100111.11110000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11110000.00000000
broadcast00001010.10100111.11110001.11111111
green = network part, grey = host part
hex0x0aa7f000
decimal178778112
reverse dns0.240.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:f000
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.167.240.0/30 | 10.167.240.1 – 10.167.240.2 | 10.167.240.3 |
| 2 | 10.167.240.4/30 | 10.167.240.5 – 10.167.240.6 | 10.167.240.7 |
| 3 | 10.167.240.8/30 | 10.167.240.9 – 10.167.240.10 | 10.167.240.11 |
| 4 | 10.167.240.12/30 | 10.167.240.13 – 10.167.240.14 | 10.167.240.15 |
| 5 | 10.167.240.16/30 | 10.167.240.17 – 10.167.240.18 | 10.167.240.19 |
| 6 | 10.167.240.20/30 | 10.167.240.21 – 10.167.240.22 | 10.167.240.23 |
| 7 | 10.167.240.24/30 | 10.167.240.25 – 10.167.240.26 | 10.167.240.27 |
| 8 | 10.167.240.28/30 | 10.167.240.29 – 10.167.240.30 | 10.167.240.31 |
| 9 | 10.167.240.32/30 | 10.167.240.33 – 10.167.240.34 | 10.167.240.35 |
| 10 | 10.167.240.36/30 | 10.167.240.37 – 10.167.240.38 | 10.167.240.39 |
| 11 | 10.167.240.40/30 | 10.167.240.41 – 10.167.240.42 | 10.167.240.43 |
| 12 | 10.167.240.44/30 | 10.167.240.45 – 10.167.240.46 | 10.167.240.47 |
| 13 | 10.167.240.48/30 | 10.167.240.49 – 10.167.240.50 | 10.167.240.51 |
| 14 | 10.167.240.52/30 | 10.167.240.53 – 10.167.240.54 | 10.167.240.55 |
| 15 | 10.167.240.56/30 | 10.167.240.57 – 10.167.240.58 | 10.167.240.59 |
| 16 | 10.167.240.60/30 | 10.167.240.61 – 10.167.240.62 | 10.167.240.63 |
| 17 | 10.167.240.64/30 | 10.167.240.65 – 10.167.240.66 | 10.167.240.67 |
| 18 | 10.167.240.68/30 | 10.167.240.69 – 10.167.240.70 | 10.167.240.71 |
| 19 | 10.167.240.72/30 | 10.167.240.73 – 10.167.240.74 | 10.167.240.75 |
| 20 | 10.167.240.76/30 | 10.167.240.77 – 10.167.240.78 | 10.167.240.79 |
| 21 | 10.167.240.80/30 | 10.167.240.81 – 10.167.240.82 | 10.167.240.83 |
| 22 | 10.167.240.84/30 | 10.167.240.85 – 10.167.240.86 | 10.167.240.87 |
| 23 | 10.167.240.88/30 | 10.167.240.89 – 10.167.240.90 | 10.167.240.91 |
| 24 | 10.167.240.92/30 | 10.167.240.93 – 10.167.240.94 | 10.167.240.95 |
| 25 | 10.167.240.96/30 | 10.167.240.97 – 10.167.240.98 | 10.167.240.99 |
| 26 | 10.167.240.100/30 | 10.167.240.101 – 10.167.240.102 | 10.167.240.103 |
| 27 | 10.167.240.104/30 | 10.167.240.105 – 10.167.240.106 | 10.167.240.107 |
| 28 | 10.167.240.108/30 | 10.167.240.109 – 10.167.240.110 | 10.167.240.111 |
| 29 | 10.167.240.112/30 | 10.167.240.113 – 10.167.240.114 | 10.167.240.115 |
| 30 | 10.167.240.116/30 | 10.167.240.117 – 10.167.240.118 | 10.167.240.119 |
| 31 | 10.167.240.120/30 | 10.167.240.121 – 10.167.240.122 | 10.167.240.123 |
| 32 | 10.167.240.124/30 | 10.167.240.125 – 10.167.240.126 | 10.167.240.127 |
| 33 | 10.167.240.128/30 | 10.167.240.129 – 10.167.240.130 | 10.167.240.131 |
| 34 | 10.167.240.132/30 | 10.167.240.133 – 10.167.240.134 | 10.167.240.135 |
| 35 | 10.167.240.136/30 | 10.167.240.137 – 10.167.240.138 | 10.167.240.139 |
| 36 | 10.167.240.140/30 | 10.167.240.141 – 10.167.240.142 | 10.167.240.143 |
| 37 | 10.167.240.144/30 | 10.167.240.145 – 10.167.240.146 | 10.167.240.147 |
| 38 | 10.167.240.148/30 | 10.167.240.149 – 10.167.240.150 | 10.167.240.151 |
| 39 | 10.167.240.152/30 | 10.167.240.153 – 10.167.240.154 | 10.167.240.155 |
| 40 | 10.167.240.156/30 | 10.167.240.157 – 10.167.240.158 | 10.167.240.159 |
| 41 | 10.167.240.160/30 | 10.167.240.161 – 10.167.240.162 | 10.167.240.163 |
| 42 | 10.167.240.164/30 | 10.167.240.165 – 10.167.240.166 | 10.167.240.167 |
| 43 | 10.167.240.168/30 | 10.167.240.169 – 10.167.240.170 | 10.167.240.171 |
| 44 | 10.167.240.172/30 | 10.167.240.173 – 10.167.240.174 | 10.167.240.175 |
| 45 | 10.167.240.176/30 | 10.167.240.177 – 10.167.240.178 | 10.167.240.179 |
| 46 | 10.167.240.180/30 | 10.167.240.181 – 10.167.240.182 | 10.167.240.183 |
| 47 | 10.167.240.184/30 | 10.167.240.185 – 10.167.240.186 | 10.167.240.187 |
| 48 | 10.167.240.188/30 | 10.167.240.189 – 10.167.240.190 | 10.167.240.191 |
| 49 | 10.167.240.192/30 | 10.167.240.193 – 10.167.240.194 | 10.167.240.195 |
| 50 | 10.167.240.196/30 | 10.167.240.197 – 10.167.240.198 | 10.167.240.199 |
| 51 | 10.167.240.200/30 | 10.167.240.201 – 10.167.240.202 | 10.167.240.203 |
| 52 | 10.167.240.204/30 | 10.167.240.205 – 10.167.240.206 | 10.167.240.207 |
| 53 | 10.167.240.208/30 | 10.167.240.209 – 10.167.240.210 | 10.167.240.211 |
| 54 | 10.167.240.212/30 | 10.167.240.213 – 10.167.240.214 | 10.167.240.215 |
| 55 | 10.167.240.216/30 | 10.167.240.217 – 10.167.240.218 | 10.167.240.219 |
| 56 | 10.167.240.220/30 | 10.167.240.221 – 10.167.240.222 | 10.167.240.223 |
| 57 | 10.167.240.224/30 | 10.167.240.225 – 10.167.240.226 | 10.167.240.227 |
| 58 | 10.167.240.228/30 | 10.167.240.229 – 10.167.240.230 | 10.167.240.231 |
| 59 | 10.167.240.232/30 | 10.167.240.233 – 10.167.240.234 | 10.167.240.235 |
| 60 | 10.167.240.236/30 | 10.167.240.237 – 10.167.240.238 | 10.167.240.239 |
| 61 | 10.167.240.240/30 | 10.167.240.241 – 10.167.240.242 | 10.167.240.243 |
| 62 | 10.167.240.244/30 | 10.167.240.245 – 10.167.240.246 | 10.167.240.247 |
| 63 | 10.167.240.248/30 | 10.167.240.249 – 10.167.240.250 | 10.167.240.251 |
| 64 | 10.167.240.252/30 | 10.167.240.253 – 10.167.240.254 | 10.167.240.255 |
| 65 | 10.167.241.0/30 | 10.167.241.1 – 10.167.241.2 | 10.167.241.3 |
| 66 | 10.167.241.4/30 | 10.167.241.5 – 10.167.241.6 | 10.167.241.7 |
| 67 | 10.167.241.8/30 | 10.167.241.9 – 10.167.241.10 | 10.167.241.11 |
| 68 | 10.167.241.12/30 | 10.167.241.13 – 10.167.241.14 | 10.167.241.15 |
| 69 | 10.167.241.16/30 | 10.167.241.17 – 10.167.241.18 | 10.167.241.19 |
| 70 | 10.167.241.20/30 | 10.167.241.21 – 10.167.241.22 | 10.167.241.23 |
| 71 | 10.167.241.24/30 | 10.167.241.25 – 10.167.241.26 | 10.167.241.27 |
| 72 | 10.167.241.28/30 | 10.167.241.29 – 10.167.241.30 | 10.167.241.31 |
| 73 | 10.167.241.32/30 | 10.167.241.33 – 10.167.241.34 | 10.167.241.35 |
| 74 | 10.167.241.36/30 | 10.167.241.37 – 10.167.241.38 | 10.167.241.39 |
| 75 | 10.167.241.40/30 | 10.167.241.41 – 10.167.241.42 | 10.167.241.43 |
| 76 | 10.167.241.44/30 | 10.167.241.45 – 10.167.241.46 | 10.167.241.47 |
| 77 | 10.167.241.48/30 | 10.167.241.49 – 10.167.241.50 | 10.167.241.51 |
| 78 | 10.167.241.52/30 | 10.167.241.53 – 10.167.241.54 | 10.167.241.55 |
| 79 | 10.167.241.56/30 | 10.167.241.57 – 10.167.241.58 | 10.167.241.59 |
| 80 | 10.167.241.60/30 | 10.167.241.61 – 10.167.241.62 | 10.167.241.63 |
| 81 | 10.167.241.64/30 | 10.167.241.65 – 10.167.241.66 | 10.167.241.67 |
| 82 | 10.167.241.68/30 | 10.167.241.69 – 10.167.241.70 | 10.167.241.71 |
| 83 | 10.167.241.72/30 | 10.167.241.73 – 10.167.241.74 | 10.167.241.75 |
| 84 | 10.167.241.76/30 | 10.167.241.77 – 10.167.241.78 | 10.167.241.79 |
| 85 | 10.167.241.80/30 | 10.167.241.81 – 10.167.241.82 | 10.167.241.83 |
| 86 | 10.167.241.84/30 | 10.167.241.85 – 10.167.241.86 | 10.167.241.87 |
| 87 | 10.167.241.88/30 | 10.167.241.89 – 10.167.241.90 | 10.167.241.91 |
| 88 | 10.167.241.92/30 | 10.167.241.93 – 10.167.241.94 | 10.167.241.95 |
| 89 | 10.167.241.96/30 | 10.167.241.97 – 10.167.241.98 | 10.167.241.99 |
| 90 | 10.167.241.100/30 | 10.167.241.101 – 10.167.241.102 | 10.167.241.103 |
| 91 | 10.167.241.104/30 | 10.167.241.105 – 10.167.241.106 | 10.167.241.107 |
| 92 | 10.167.241.108/30 | 10.167.241.109 – 10.167.241.110 | 10.167.241.111 |
| 93 | 10.167.241.112/30 | 10.167.241.113 – 10.167.241.114 | 10.167.241.115 |
| 94 | 10.167.241.116/30 | 10.167.241.117 – 10.167.241.118 | 10.167.241.119 |
| 95 | 10.167.241.120/30 | 10.167.241.121 – 10.167.241.122 | 10.167.241.123 |
| 96 | 10.167.241.124/30 | 10.167.241.125 – 10.167.241.126 | 10.167.241.127 |
| 97 | 10.167.241.128/30 | 10.167.241.129 – 10.167.241.130 | 10.167.241.131 |
| 98 | 10.167.241.132/30 | 10.167.241.133 – 10.167.241.134 | 10.167.241.135 |
| 99 | 10.167.241.136/30 | 10.167.241.137 – 10.167.241.138 | 10.167.241.139 |
| 100 | 10.167.241.140/30 | 10.167.241.141 – 10.167.241.142 | 10.167.241.143 |
| 101 | 10.167.241.144/30 | 10.167.241.145 – 10.167.241.146 | 10.167.241.147 |
| 102 | 10.167.241.148/30 | 10.167.241.149 – 10.167.241.150 | 10.167.241.151 |
| 103 | 10.167.241.152/30 | 10.167.241.153 – 10.167.241.154 | 10.167.241.155 |
| 104 | 10.167.241.156/30 | 10.167.241.157 – 10.167.241.158 | 10.167.241.159 |
| 105 | 10.167.241.160/30 | 10.167.241.161 – 10.167.241.162 | 10.167.241.163 |
| 106 | 10.167.241.164/30 | 10.167.241.165 – 10.167.241.166 | 10.167.241.167 |
| 107 | 10.167.241.168/30 | 10.167.241.169 – 10.167.241.170 | 10.167.241.171 |
| 108 | 10.167.241.172/30 | 10.167.241.173 – 10.167.241.174 | 10.167.241.175 |
| 109 | 10.167.241.176/30 | 10.167.241.177 – 10.167.241.178 | 10.167.241.179 |
| 110 | 10.167.241.180/30 | 10.167.241.181 – 10.167.241.182 | 10.167.241.183 |
| 111 | 10.167.241.184/30 | 10.167.241.185 – 10.167.241.186 | 10.167.241.187 |
| 112 | 10.167.241.188/30 | 10.167.241.189 – 10.167.241.190 | 10.167.241.191 |
| 113 | 10.167.241.192/30 | 10.167.241.193 – 10.167.241.194 | 10.167.241.195 |
| 114 | 10.167.241.196/30 | 10.167.241.197 – 10.167.241.198 | 10.167.241.199 |
| 115 | 10.167.241.200/30 | 10.167.241.201 – 10.167.241.202 | 10.167.241.203 |
| 116 | 10.167.241.204/30 | 10.167.241.205 – 10.167.241.206 | 10.167.241.207 |
| 117 | 10.167.241.208/30 | 10.167.241.209 – 10.167.241.210 | 10.167.241.211 |
| 118 | 10.167.241.212/30 | 10.167.241.213 – 10.167.241.214 | 10.167.241.215 |
| 119 | 10.167.241.216/30 | 10.167.241.217 – 10.167.241.218 | 10.167.241.219 |
| 120 | 10.167.241.220/30 | 10.167.241.221 – 10.167.241.222 | 10.167.241.223 |
| 121 | 10.167.241.224/30 | 10.167.241.225 – 10.167.241.226 | 10.167.241.227 |
| 122 | 10.167.241.228/30 | 10.167.241.229 – 10.167.241.230 | 10.167.241.231 |
| 123 | 10.167.241.232/30 | 10.167.241.233 – 10.167.241.234 | 10.167.241.235 |
| 124 | 10.167.241.236/30 | 10.167.241.237 – 10.167.241.238 | 10.167.241.239 |
| 125 | 10.167.241.240/30 | 10.167.241.241 – 10.167.241.242 | 10.167.241.243 |
| 126 | 10.167.241.244/30 | 10.167.241.245 – 10.167.241.246 | 10.167.241.247 |
| 127 | 10.167.241.248/30 | 10.167.241.249 – 10.167.241.250 | 10.167.241.251 |
| 128 | 10.167.241.252/30 | 10.167.241.253 – 10.167.241.254 | 10.167.241.255 |
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.