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)10.167.218.0/23
network10.167.218.0/23
broadcast10.167.219.255
first host10.167.218.1
last host10.167.219.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.218.0/23
address00001010.10100111.11011010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11011010.00000000
broadcast00001010.10100111.11011011.11111111
green = network part, grey = host part
hex0x0aa7da00
decimal178772480
reverse dns0.218.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:da00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.167.218.0/30 | 10.167.218.1 – 10.167.218.2 | 10.167.218.3 |
| 2 | 10.167.218.4/30 | 10.167.218.5 – 10.167.218.6 | 10.167.218.7 |
| 3 | 10.167.218.8/30 | 10.167.218.9 – 10.167.218.10 | 10.167.218.11 |
| 4 | 10.167.218.12/30 | 10.167.218.13 – 10.167.218.14 | 10.167.218.15 |
| 5 | 10.167.218.16/30 | 10.167.218.17 – 10.167.218.18 | 10.167.218.19 |
| 6 | 10.167.218.20/30 | 10.167.218.21 – 10.167.218.22 | 10.167.218.23 |
| 7 | 10.167.218.24/30 | 10.167.218.25 – 10.167.218.26 | 10.167.218.27 |
| 8 | 10.167.218.28/30 | 10.167.218.29 – 10.167.218.30 | 10.167.218.31 |
| 9 | 10.167.218.32/30 | 10.167.218.33 – 10.167.218.34 | 10.167.218.35 |
| 10 | 10.167.218.36/30 | 10.167.218.37 – 10.167.218.38 | 10.167.218.39 |
| 11 | 10.167.218.40/30 | 10.167.218.41 – 10.167.218.42 | 10.167.218.43 |
| 12 | 10.167.218.44/30 | 10.167.218.45 – 10.167.218.46 | 10.167.218.47 |
| 13 | 10.167.218.48/30 | 10.167.218.49 – 10.167.218.50 | 10.167.218.51 |
| 14 | 10.167.218.52/30 | 10.167.218.53 – 10.167.218.54 | 10.167.218.55 |
| 15 | 10.167.218.56/30 | 10.167.218.57 – 10.167.218.58 | 10.167.218.59 |
| 16 | 10.167.218.60/30 | 10.167.218.61 – 10.167.218.62 | 10.167.218.63 |
| 17 | 10.167.218.64/30 | 10.167.218.65 – 10.167.218.66 | 10.167.218.67 |
| 18 | 10.167.218.68/30 | 10.167.218.69 – 10.167.218.70 | 10.167.218.71 |
| 19 | 10.167.218.72/30 | 10.167.218.73 – 10.167.218.74 | 10.167.218.75 |
| 20 | 10.167.218.76/30 | 10.167.218.77 – 10.167.218.78 | 10.167.218.79 |
| 21 | 10.167.218.80/30 | 10.167.218.81 – 10.167.218.82 | 10.167.218.83 |
| 22 | 10.167.218.84/30 | 10.167.218.85 – 10.167.218.86 | 10.167.218.87 |
| 23 | 10.167.218.88/30 | 10.167.218.89 – 10.167.218.90 | 10.167.218.91 |
| 24 | 10.167.218.92/30 | 10.167.218.93 – 10.167.218.94 | 10.167.218.95 |
| 25 | 10.167.218.96/30 | 10.167.218.97 – 10.167.218.98 | 10.167.218.99 |
| 26 | 10.167.218.100/30 | 10.167.218.101 – 10.167.218.102 | 10.167.218.103 |
| 27 | 10.167.218.104/30 | 10.167.218.105 – 10.167.218.106 | 10.167.218.107 |
| 28 | 10.167.218.108/30 | 10.167.218.109 – 10.167.218.110 | 10.167.218.111 |
| 29 | 10.167.218.112/30 | 10.167.218.113 – 10.167.218.114 | 10.167.218.115 |
| 30 | 10.167.218.116/30 | 10.167.218.117 – 10.167.218.118 | 10.167.218.119 |
| 31 | 10.167.218.120/30 | 10.167.218.121 – 10.167.218.122 | 10.167.218.123 |
| 32 | 10.167.218.124/30 | 10.167.218.125 – 10.167.218.126 | 10.167.218.127 |
| 33 | 10.167.218.128/30 | 10.167.218.129 – 10.167.218.130 | 10.167.218.131 |
| 34 | 10.167.218.132/30 | 10.167.218.133 – 10.167.218.134 | 10.167.218.135 |
| 35 | 10.167.218.136/30 | 10.167.218.137 – 10.167.218.138 | 10.167.218.139 |
| 36 | 10.167.218.140/30 | 10.167.218.141 – 10.167.218.142 | 10.167.218.143 |
| 37 | 10.167.218.144/30 | 10.167.218.145 – 10.167.218.146 | 10.167.218.147 |
| 38 | 10.167.218.148/30 | 10.167.218.149 – 10.167.218.150 | 10.167.218.151 |
| 39 | 10.167.218.152/30 | 10.167.218.153 – 10.167.218.154 | 10.167.218.155 |
| 40 | 10.167.218.156/30 | 10.167.218.157 – 10.167.218.158 | 10.167.218.159 |
| 41 | 10.167.218.160/30 | 10.167.218.161 – 10.167.218.162 | 10.167.218.163 |
| 42 | 10.167.218.164/30 | 10.167.218.165 – 10.167.218.166 | 10.167.218.167 |
| 43 | 10.167.218.168/30 | 10.167.218.169 – 10.167.218.170 | 10.167.218.171 |
| 44 | 10.167.218.172/30 | 10.167.218.173 – 10.167.218.174 | 10.167.218.175 |
| 45 | 10.167.218.176/30 | 10.167.218.177 – 10.167.218.178 | 10.167.218.179 |
| 46 | 10.167.218.180/30 | 10.167.218.181 – 10.167.218.182 | 10.167.218.183 |
| 47 | 10.167.218.184/30 | 10.167.218.185 – 10.167.218.186 | 10.167.218.187 |
| 48 | 10.167.218.188/30 | 10.167.218.189 – 10.167.218.190 | 10.167.218.191 |
| 49 | 10.167.218.192/30 | 10.167.218.193 – 10.167.218.194 | 10.167.218.195 |
| 50 | 10.167.218.196/30 | 10.167.218.197 – 10.167.218.198 | 10.167.218.199 |
| 51 | 10.167.218.200/30 | 10.167.218.201 – 10.167.218.202 | 10.167.218.203 |
| 52 | 10.167.218.204/30 | 10.167.218.205 – 10.167.218.206 | 10.167.218.207 |
| 53 | 10.167.218.208/30 | 10.167.218.209 – 10.167.218.210 | 10.167.218.211 |
| 54 | 10.167.218.212/30 | 10.167.218.213 – 10.167.218.214 | 10.167.218.215 |
| 55 | 10.167.218.216/30 | 10.167.218.217 – 10.167.218.218 | 10.167.218.219 |
| 56 | 10.167.218.220/30 | 10.167.218.221 – 10.167.218.222 | 10.167.218.223 |
| 57 | 10.167.218.224/30 | 10.167.218.225 – 10.167.218.226 | 10.167.218.227 |
| 58 | 10.167.218.228/30 | 10.167.218.229 – 10.167.218.230 | 10.167.218.231 |
| 59 | 10.167.218.232/30 | 10.167.218.233 – 10.167.218.234 | 10.167.218.235 |
| 60 | 10.167.218.236/30 | 10.167.218.237 – 10.167.218.238 | 10.167.218.239 |
| 61 | 10.167.218.240/30 | 10.167.218.241 – 10.167.218.242 | 10.167.218.243 |
| 62 | 10.167.218.244/30 | 10.167.218.245 – 10.167.218.246 | 10.167.218.247 |
| 63 | 10.167.218.248/30 | 10.167.218.249 – 10.167.218.250 | 10.167.218.251 |
| 64 | 10.167.218.252/30 | 10.167.218.253 – 10.167.218.254 | 10.167.218.255 |
| 65 | 10.167.219.0/30 | 10.167.219.1 – 10.167.219.2 | 10.167.219.3 |
| 66 | 10.167.219.4/30 | 10.167.219.5 – 10.167.219.6 | 10.167.219.7 |
| 67 | 10.167.219.8/30 | 10.167.219.9 – 10.167.219.10 | 10.167.219.11 |
| 68 | 10.167.219.12/30 | 10.167.219.13 – 10.167.219.14 | 10.167.219.15 |
| 69 | 10.167.219.16/30 | 10.167.219.17 – 10.167.219.18 | 10.167.219.19 |
| 70 | 10.167.219.20/30 | 10.167.219.21 – 10.167.219.22 | 10.167.219.23 |
| 71 | 10.167.219.24/30 | 10.167.219.25 – 10.167.219.26 | 10.167.219.27 |
| 72 | 10.167.219.28/30 | 10.167.219.29 – 10.167.219.30 | 10.167.219.31 |
| 73 | 10.167.219.32/30 | 10.167.219.33 – 10.167.219.34 | 10.167.219.35 |
| 74 | 10.167.219.36/30 | 10.167.219.37 – 10.167.219.38 | 10.167.219.39 |
| 75 | 10.167.219.40/30 | 10.167.219.41 – 10.167.219.42 | 10.167.219.43 |
| 76 | 10.167.219.44/30 | 10.167.219.45 – 10.167.219.46 | 10.167.219.47 |
| 77 | 10.167.219.48/30 | 10.167.219.49 – 10.167.219.50 | 10.167.219.51 |
| 78 | 10.167.219.52/30 | 10.167.219.53 – 10.167.219.54 | 10.167.219.55 |
| 79 | 10.167.219.56/30 | 10.167.219.57 – 10.167.219.58 | 10.167.219.59 |
| 80 | 10.167.219.60/30 | 10.167.219.61 – 10.167.219.62 | 10.167.219.63 |
| 81 | 10.167.219.64/30 | 10.167.219.65 – 10.167.219.66 | 10.167.219.67 |
| 82 | 10.167.219.68/30 | 10.167.219.69 – 10.167.219.70 | 10.167.219.71 |
| 83 | 10.167.219.72/30 | 10.167.219.73 – 10.167.219.74 | 10.167.219.75 |
| 84 | 10.167.219.76/30 | 10.167.219.77 – 10.167.219.78 | 10.167.219.79 |
| 85 | 10.167.219.80/30 | 10.167.219.81 – 10.167.219.82 | 10.167.219.83 |
| 86 | 10.167.219.84/30 | 10.167.219.85 – 10.167.219.86 | 10.167.219.87 |
| 87 | 10.167.219.88/30 | 10.167.219.89 – 10.167.219.90 | 10.167.219.91 |
| 88 | 10.167.219.92/30 | 10.167.219.93 – 10.167.219.94 | 10.167.219.95 |
| 89 | 10.167.219.96/30 | 10.167.219.97 – 10.167.219.98 | 10.167.219.99 |
| 90 | 10.167.219.100/30 | 10.167.219.101 – 10.167.219.102 | 10.167.219.103 |
| 91 | 10.167.219.104/30 | 10.167.219.105 – 10.167.219.106 | 10.167.219.107 |
| 92 | 10.167.219.108/30 | 10.167.219.109 – 10.167.219.110 | 10.167.219.111 |
| 93 | 10.167.219.112/30 | 10.167.219.113 – 10.167.219.114 | 10.167.219.115 |
| 94 | 10.167.219.116/30 | 10.167.219.117 – 10.167.219.118 | 10.167.219.119 |
| 95 | 10.167.219.120/30 | 10.167.219.121 – 10.167.219.122 | 10.167.219.123 |
| 96 | 10.167.219.124/30 | 10.167.219.125 – 10.167.219.126 | 10.167.219.127 |
| 97 | 10.167.219.128/30 | 10.167.219.129 – 10.167.219.130 | 10.167.219.131 |
| 98 | 10.167.219.132/30 | 10.167.219.133 – 10.167.219.134 | 10.167.219.135 |
| 99 | 10.167.219.136/30 | 10.167.219.137 – 10.167.219.138 | 10.167.219.139 |
| 100 | 10.167.219.140/30 | 10.167.219.141 – 10.167.219.142 | 10.167.219.143 |
| 101 | 10.167.219.144/30 | 10.167.219.145 – 10.167.219.146 | 10.167.219.147 |
| 102 | 10.167.219.148/30 | 10.167.219.149 – 10.167.219.150 | 10.167.219.151 |
| 103 | 10.167.219.152/30 | 10.167.219.153 – 10.167.219.154 | 10.167.219.155 |
| 104 | 10.167.219.156/30 | 10.167.219.157 – 10.167.219.158 | 10.167.219.159 |
| 105 | 10.167.219.160/30 | 10.167.219.161 – 10.167.219.162 | 10.167.219.163 |
| 106 | 10.167.219.164/30 | 10.167.219.165 – 10.167.219.166 | 10.167.219.167 |
| 107 | 10.167.219.168/30 | 10.167.219.169 – 10.167.219.170 | 10.167.219.171 |
| 108 | 10.167.219.172/30 | 10.167.219.173 – 10.167.219.174 | 10.167.219.175 |
| 109 | 10.167.219.176/30 | 10.167.219.177 – 10.167.219.178 | 10.167.219.179 |
| 110 | 10.167.219.180/30 | 10.167.219.181 – 10.167.219.182 | 10.167.219.183 |
| 111 | 10.167.219.184/30 | 10.167.219.185 – 10.167.219.186 | 10.167.219.187 |
| 112 | 10.167.219.188/30 | 10.167.219.189 – 10.167.219.190 | 10.167.219.191 |
| 113 | 10.167.219.192/30 | 10.167.219.193 – 10.167.219.194 | 10.167.219.195 |
| 114 | 10.167.219.196/30 | 10.167.219.197 – 10.167.219.198 | 10.167.219.199 |
| 115 | 10.167.219.200/30 | 10.167.219.201 – 10.167.219.202 | 10.167.219.203 |
| 116 | 10.167.219.204/30 | 10.167.219.205 – 10.167.219.206 | 10.167.219.207 |
| 117 | 10.167.219.208/30 | 10.167.219.209 – 10.167.219.210 | 10.167.219.211 |
| 118 | 10.167.219.212/30 | 10.167.219.213 – 10.167.219.214 | 10.167.219.215 |
| 119 | 10.167.219.216/30 | 10.167.219.217 – 10.167.219.218 | 10.167.219.219 |
| 120 | 10.167.219.220/30 | 10.167.219.221 – 10.167.219.222 | 10.167.219.223 |
| 121 | 10.167.219.224/30 | 10.167.219.225 – 10.167.219.226 | 10.167.219.227 |
| 122 | 10.167.219.228/30 | 10.167.219.229 – 10.167.219.230 | 10.167.219.231 |
| 123 | 10.167.219.232/30 | 10.167.219.233 – 10.167.219.234 | 10.167.219.235 |
| 124 | 10.167.219.236/30 | 10.167.219.237 – 10.167.219.238 | 10.167.219.239 |
| 125 | 10.167.219.240/30 | 10.167.219.241 – 10.167.219.242 | 10.167.219.243 |
| 126 | 10.167.219.244/30 | 10.167.219.245 – 10.167.219.246 | 10.167.219.247 |
| 127 | 10.167.219.248/30 | 10.167.219.249 – 10.167.219.250 | 10.167.219.251 |
| 128 | 10.167.219.252/30 | 10.167.219.253 – 10.167.219.254 | 10.167.219.255 |
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.