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)10.26.40.0/23
network10.26.40.0/23
broadcast10.26.41.255
first host10.26.40.1
last host10.26.41.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.26.40.0/23
address00001010.00011010.00101000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00011010.00101000.00000000
broadcast00001010.00011010.00101001.11111111
green = network part, grey = host part
hex0x0a1a2800
decimal169486336
reverse dns0.40.26.10.in-addr.arpa
ipv4-mapped::ffff:a1a:2800
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.26.40.0/30 | 10.26.40.1 – 10.26.40.2 | 10.26.40.3 |
| 2 | 10.26.40.4/30 | 10.26.40.5 – 10.26.40.6 | 10.26.40.7 |
| 3 | 10.26.40.8/30 | 10.26.40.9 – 10.26.40.10 | 10.26.40.11 |
| 4 | 10.26.40.12/30 | 10.26.40.13 – 10.26.40.14 | 10.26.40.15 |
| 5 | 10.26.40.16/30 | 10.26.40.17 – 10.26.40.18 | 10.26.40.19 |
| 6 | 10.26.40.20/30 | 10.26.40.21 – 10.26.40.22 | 10.26.40.23 |
| 7 | 10.26.40.24/30 | 10.26.40.25 – 10.26.40.26 | 10.26.40.27 |
| 8 | 10.26.40.28/30 | 10.26.40.29 – 10.26.40.30 | 10.26.40.31 |
| 9 | 10.26.40.32/30 | 10.26.40.33 – 10.26.40.34 | 10.26.40.35 |
| 10 | 10.26.40.36/30 | 10.26.40.37 – 10.26.40.38 | 10.26.40.39 |
| 11 | 10.26.40.40/30 | 10.26.40.41 – 10.26.40.42 | 10.26.40.43 |
| 12 | 10.26.40.44/30 | 10.26.40.45 – 10.26.40.46 | 10.26.40.47 |
| 13 | 10.26.40.48/30 | 10.26.40.49 – 10.26.40.50 | 10.26.40.51 |
| 14 | 10.26.40.52/30 | 10.26.40.53 – 10.26.40.54 | 10.26.40.55 |
| 15 | 10.26.40.56/30 | 10.26.40.57 – 10.26.40.58 | 10.26.40.59 |
| 16 | 10.26.40.60/30 | 10.26.40.61 – 10.26.40.62 | 10.26.40.63 |
| 17 | 10.26.40.64/30 | 10.26.40.65 – 10.26.40.66 | 10.26.40.67 |
| 18 | 10.26.40.68/30 | 10.26.40.69 – 10.26.40.70 | 10.26.40.71 |
| 19 | 10.26.40.72/30 | 10.26.40.73 – 10.26.40.74 | 10.26.40.75 |
| 20 | 10.26.40.76/30 | 10.26.40.77 – 10.26.40.78 | 10.26.40.79 |
| 21 | 10.26.40.80/30 | 10.26.40.81 – 10.26.40.82 | 10.26.40.83 |
| 22 | 10.26.40.84/30 | 10.26.40.85 – 10.26.40.86 | 10.26.40.87 |
| 23 | 10.26.40.88/30 | 10.26.40.89 – 10.26.40.90 | 10.26.40.91 |
| 24 | 10.26.40.92/30 | 10.26.40.93 – 10.26.40.94 | 10.26.40.95 |
| 25 | 10.26.40.96/30 | 10.26.40.97 – 10.26.40.98 | 10.26.40.99 |
| 26 | 10.26.40.100/30 | 10.26.40.101 – 10.26.40.102 | 10.26.40.103 |
| 27 | 10.26.40.104/30 | 10.26.40.105 – 10.26.40.106 | 10.26.40.107 |
| 28 | 10.26.40.108/30 | 10.26.40.109 – 10.26.40.110 | 10.26.40.111 |
| 29 | 10.26.40.112/30 | 10.26.40.113 – 10.26.40.114 | 10.26.40.115 |
| 30 | 10.26.40.116/30 | 10.26.40.117 – 10.26.40.118 | 10.26.40.119 |
| 31 | 10.26.40.120/30 | 10.26.40.121 – 10.26.40.122 | 10.26.40.123 |
| 32 | 10.26.40.124/30 | 10.26.40.125 – 10.26.40.126 | 10.26.40.127 |
| 33 | 10.26.40.128/30 | 10.26.40.129 – 10.26.40.130 | 10.26.40.131 |
| 34 | 10.26.40.132/30 | 10.26.40.133 – 10.26.40.134 | 10.26.40.135 |
| 35 | 10.26.40.136/30 | 10.26.40.137 – 10.26.40.138 | 10.26.40.139 |
| 36 | 10.26.40.140/30 | 10.26.40.141 – 10.26.40.142 | 10.26.40.143 |
| 37 | 10.26.40.144/30 | 10.26.40.145 – 10.26.40.146 | 10.26.40.147 |
| 38 | 10.26.40.148/30 | 10.26.40.149 – 10.26.40.150 | 10.26.40.151 |
| 39 | 10.26.40.152/30 | 10.26.40.153 – 10.26.40.154 | 10.26.40.155 |
| 40 | 10.26.40.156/30 | 10.26.40.157 – 10.26.40.158 | 10.26.40.159 |
| 41 | 10.26.40.160/30 | 10.26.40.161 – 10.26.40.162 | 10.26.40.163 |
| 42 | 10.26.40.164/30 | 10.26.40.165 – 10.26.40.166 | 10.26.40.167 |
| 43 | 10.26.40.168/30 | 10.26.40.169 – 10.26.40.170 | 10.26.40.171 |
| 44 | 10.26.40.172/30 | 10.26.40.173 – 10.26.40.174 | 10.26.40.175 |
| 45 | 10.26.40.176/30 | 10.26.40.177 – 10.26.40.178 | 10.26.40.179 |
| 46 | 10.26.40.180/30 | 10.26.40.181 – 10.26.40.182 | 10.26.40.183 |
| 47 | 10.26.40.184/30 | 10.26.40.185 – 10.26.40.186 | 10.26.40.187 |
| 48 | 10.26.40.188/30 | 10.26.40.189 – 10.26.40.190 | 10.26.40.191 |
| 49 | 10.26.40.192/30 | 10.26.40.193 – 10.26.40.194 | 10.26.40.195 |
| 50 | 10.26.40.196/30 | 10.26.40.197 – 10.26.40.198 | 10.26.40.199 |
| 51 | 10.26.40.200/30 | 10.26.40.201 – 10.26.40.202 | 10.26.40.203 |
| 52 | 10.26.40.204/30 | 10.26.40.205 – 10.26.40.206 | 10.26.40.207 |
| 53 | 10.26.40.208/30 | 10.26.40.209 – 10.26.40.210 | 10.26.40.211 |
| 54 | 10.26.40.212/30 | 10.26.40.213 – 10.26.40.214 | 10.26.40.215 |
| 55 | 10.26.40.216/30 | 10.26.40.217 – 10.26.40.218 | 10.26.40.219 |
| 56 | 10.26.40.220/30 | 10.26.40.221 – 10.26.40.222 | 10.26.40.223 |
| 57 | 10.26.40.224/30 | 10.26.40.225 – 10.26.40.226 | 10.26.40.227 |
| 58 | 10.26.40.228/30 | 10.26.40.229 – 10.26.40.230 | 10.26.40.231 |
| 59 | 10.26.40.232/30 | 10.26.40.233 – 10.26.40.234 | 10.26.40.235 |
| 60 | 10.26.40.236/30 | 10.26.40.237 – 10.26.40.238 | 10.26.40.239 |
| 61 | 10.26.40.240/30 | 10.26.40.241 – 10.26.40.242 | 10.26.40.243 |
| 62 | 10.26.40.244/30 | 10.26.40.245 – 10.26.40.246 | 10.26.40.247 |
| 63 | 10.26.40.248/30 | 10.26.40.249 – 10.26.40.250 | 10.26.40.251 |
| 64 | 10.26.40.252/30 | 10.26.40.253 – 10.26.40.254 | 10.26.40.255 |
| 65 | 10.26.41.0/30 | 10.26.41.1 – 10.26.41.2 | 10.26.41.3 |
| 66 | 10.26.41.4/30 | 10.26.41.5 – 10.26.41.6 | 10.26.41.7 |
| 67 | 10.26.41.8/30 | 10.26.41.9 – 10.26.41.10 | 10.26.41.11 |
| 68 | 10.26.41.12/30 | 10.26.41.13 – 10.26.41.14 | 10.26.41.15 |
| 69 | 10.26.41.16/30 | 10.26.41.17 – 10.26.41.18 | 10.26.41.19 |
| 70 | 10.26.41.20/30 | 10.26.41.21 – 10.26.41.22 | 10.26.41.23 |
| 71 | 10.26.41.24/30 | 10.26.41.25 – 10.26.41.26 | 10.26.41.27 |
| 72 | 10.26.41.28/30 | 10.26.41.29 – 10.26.41.30 | 10.26.41.31 |
| 73 | 10.26.41.32/30 | 10.26.41.33 – 10.26.41.34 | 10.26.41.35 |
| 74 | 10.26.41.36/30 | 10.26.41.37 – 10.26.41.38 | 10.26.41.39 |
| 75 | 10.26.41.40/30 | 10.26.41.41 – 10.26.41.42 | 10.26.41.43 |
| 76 | 10.26.41.44/30 | 10.26.41.45 – 10.26.41.46 | 10.26.41.47 |
| 77 | 10.26.41.48/30 | 10.26.41.49 – 10.26.41.50 | 10.26.41.51 |
| 78 | 10.26.41.52/30 | 10.26.41.53 – 10.26.41.54 | 10.26.41.55 |
| 79 | 10.26.41.56/30 | 10.26.41.57 – 10.26.41.58 | 10.26.41.59 |
| 80 | 10.26.41.60/30 | 10.26.41.61 – 10.26.41.62 | 10.26.41.63 |
| 81 | 10.26.41.64/30 | 10.26.41.65 – 10.26.41.66 | 10.26.41.67 |
| 82 | 10.26.41.68/30 | 10.26.41.69 – 10.26.41.70 | 10.26.41.71 |
| 83 | 10.26.41.72/30 | 10.26.41.73 – 10.26.41.74 | 10.26.41.75 |
| 84 | 10.26.41.76/30 | 10.26.41.77 – 10.26.41.78 | 10.26.41.79 |
| 85 | 10.26.41.80/30 | 10.26.41.81 – 10.26.41.82 | 10.26.41.83 |
| 86 | 10.26.41.84/30 | 10.26.41.85 – 10.26.41.86 | 10.26.41.87 |
| 87 | 10.26.41.88/30 | 10.26.41.89 – 10.26.41.90 | 10.26.41.91 |
| 88 | 10.26.41.92/30 | 10.26.41.93 – 10.26.41.94 | 10.26.41.95 |
| 89 | 10.26.41.96/30 | 10.26.41.97 – 10.26.41.98 | 10.26.41.99 |
| 90 | 10.26.41.100/30 | 10.26.41.101 – 10.26.41.102 | 10.26.41.103 |
| 91 | 10.26.41.104/30 | 10.26.41.105 – 10.26.41.106 | 10.26.41.107 |
| 92 | 10.26.41.108/30 | 10.26.41.109 – 10.26.41.110 | 10.26.41.111 |
| 93 | 10.26.41.112/30 | 10.26.41.113 – 10.26.41.114 | 10.26.41.115 |
| 94 | 10.26.41.116/30 | 10.26.41.117 – 10.26.41.118 | 10.26.41.119 |
| 95 | 10.26.41.120/30 | 10.26.41.121 – 10.26.41.122 | 10.26.41.123 |
| 96 | 10.26.41.124/30 | 10.26.41.125 – 10.26.41.126 | 10.26.41.127 |
| 97 | 10.26.41.128/30 | 10.26.41.129 – 10.26.41.130 | 10.26.41.131 |
| 98 | 10.26.41.132/30 | 10.26.41.133 – 10.26.41.134 | 10.26.41.135 |
| 99 | 10.26.41.136/30 | 10.26.41.137 – 10.26.41.138 | 10.26.41.139 |
| 100 | 10.26.41.140/30 | 10.26.41.141 – 10.26.41.142 | 10.26.41.143 |
| 101 | 10.26.41.144/30 | 10.26.41.145 – 10.26.41.146 | 10.26.41.147 |
| 102 | 10.26.41.148/30 | 10.26.41.149 – 10.26.41.150 | 10.26.41.151 |
| 103 | 10.26.41.152/30 | 10.26.41.153 – 10.26.41.154 | 10.26.41.155 |
| 104 | 10.26.41.156/30 | 10.26.41.157 – 10.26.41.158 | 10.26.41.159 |
| 105 | 10.26.41.160/30 | 10.26.41.161 – 10.26.41.162 | 10.26.41.163 |
| 106 | 10.26.41.164/30 | 10.26.41.165 – 10.26.41.166 | 10.26.41.167 |
| 107 | 10.26.41.168/30 | 10.26.41.169 – 10.26.41.170 | 10.26.41.171 |
| 108 | 10.26.41.172/30 | 10.26.41.173 – 10.26.41.174 | 10.26.41.175 |
| 109 | 10.26.41.176/30 | 10.26.41.177 – 10.26.41.178 | 10.26.41.179 |
| 110 | 10.26.41.180/30 | 10.26.41.181 – 10.26.41.182 | 10.26.41.183 |
| 111 | 10.26.41.184/30 | 10.26.41.185 – 10.26.41.186 | 10.26.41.187 |
| 112 | 10.26.41.188/30 | 10.26.41.189 – 10.26.41.190 | 10.26.41.191 |
| 113 | 10.26.41.192/30 | 10.26.41.193 – 10.26.41.194 | 10.26.41.195 |
| 114 | 10.26.41.196/30 | 10.26.41.197 – 10.26.41.198 | 10.26.41.199 |
| 115 | 10.26.41.200/30 | 10.26.41.201 – 10.26.41.202 | 10.26.41.203 |
| 116 | 10.26.41.204/30 | 10.26.41.205 – 10.26.41.206 | 10.26.41.207 |
| 117 | 10.26.41.208/30 | 10.26.41.209 – 10.26.41.210 | 10.26.41.211 |
| 118 | 10.26.41.212/30 | 10.26.41.213 – 10.26.41.214 | 10.26.41.215 |
| 119 | 10.26.41.216/30 | 10.26.41.217 – 10.26.41.218 | 10.26.41.219 |
| 120 | 10.26.41.220/30 | 10.26.41.221 – 10.26.41.222 | 10.26.41.223 |
| 121 | 10.26.41.224/30 | 10.26.41.225 – 10.26.41.226 | 10.26.41.227 |
| 122 | 10.26.41.228/30 | 10.26.41.229 – 10.26.41.230 | 10.26.41.231 |
| 123 | 10.26.41.232/30 | 10.26.41.233 – 10.26.41.234 | 10.26.41.235 |
| 124 | 10.26.41.236/30 | 10.26.41.237 – 10.26.41.238 | 10.26.41.239 |
| 125 | 10.26.41.240/30 | 10.26.41.241 – 10.26.41.242 | 10.26.41.243 |
| 126 | 10.26.41.244/30 | 10.26.41.245 – 10.26.41.246 | 10.26.41.247 |
| 127 | 10.26.41.248/30 | 10.26.41.249 – 10.26.41.250 | 10.26.41.251 |
| 128 | 10.26.41.252/30 | 10.26.41.253 – 10.26.41.254 | 10.26.41.255 |
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.