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)10.80.72.0/23
network10.80.72.0/23
broadcast10.80.73.255
first host10.80.72.1
last host10.80.73.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.80.72.0/23
address00001010.01010000.01001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010000.01001000.00000000
broadcast00001010.01010000.01001001.11111111
green = network part, grey = host part
hex0x0a504800
decimal173033472
reverse dns0.72.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:4800
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.80.72.0/30 | 10.80.72.1 – 10.80.72.2 | 10.80.72.3 |
| 2 | 10.80.72.4/30 | 10.80.72.5 – 10.80.72.6 | 10.80.72.7 |
| 3 | 10.80.72.8/30 | 10.80.72.9 – 10.80.72.10 | 10.80.72.11 |
| 4 | 10.80.72.12/30 | 10.80.72.13 – 10.80.72.14 | 10.80.72.15 |
| 5 | 10.80.72.16/30 | 10.80.72.17 – 10.80.72.18 | 10.80.72.19 |
| 6 | 10.80.72.20/30 | 10.80.72.21 – 10.80.72.22 | 10.80.72.23 |
| 7 | 10.80.72.24/30 | 10.80.72.25 – 10.80.72.26 | 10.80.72.27 |
| 8 | 10.80.72.28/30 | 10.80.72.29 – 10.80.72.30 | 10.80.72.31 |
| 9 | 10.80.72.32/30 | 10.80.72.33 – 10.80.72.34 | 10.80.72.35 |
| 10 | 10.80.72.36/30 | 10.80.72.37 – 10.80.72.38 | 10.80.72.39 |
| 11 | 10.80.72.40/30 | 10.80.72.41 – 10.80.72.42 | 10.80.72.43 |
| 12 | 10.80.72.44/30 | 10.80.72.45 – 10.80.72.46 | 10.80.72.47 |
| 13 | 10.80.72.48/30 | 10.80.72.49 – 10.80.72.50 | 10.80.72.51 |
| 14 | 10.80.72.52/30 | 10.80.72.53 – 10.80.72.54 | 10.80.72.55 |
| 15 | 10.80.72.56/30 | 10.80.72.57 – 10.80.72.58 | 10.80.72.59 |
| 16 | 10.80.72.60/30 | 10.80.72.61 – 10.80.72.62 | 10.80.72.63 |
| 17 | 10.80.72.64/30 | 10.80.72.65 – 10.80.72.66 | 10.80.72.67 |
| 18 | 10.80.72.68/30 | 10.80.72.69 – 10.80.72.70 | 10.80.72.71 |
| 19 | 10.80.72.72/30 | 10.80.72.73 – 10.80.72.74 | 10.80.72.75 |
| 20 | 10.80.72.76/30 | 10.80.72.77 – 10.80.72.78 | 10.80.72.79 |
| 21 | 10.80.72.80/30 | 10.80.72.81 – 10.80.72.82 | 10.80.72.83 |
| 22 | 10.80.72.84/30 | 10.80.72.85 – 10.80.72.86 | 10.80.72.87 |
| 23 | 10.80.72.88/30 | 10.80.72.89 – 10.80.72.90 | 10.80.72.91 |
| 24 | 10.80.72.92/30 | 10.80.72.93 – 10.80.72.94 | 10.80.72.95 |
| 25 | 10.80.72.96/30 | 10.80.72.97 – 10.80.72.98 | 10.80.72.99 |
| 26 | 10.80.72.100/30 | 10.80.72.101 – 10.80.72.102 | 10.80.72.103 |
| 27 | 10.80.72.104/30 | 10.80.72.105 – 10.80.72.106 | 10.80.72.107 |
| 28 | 10.80.72.108/30 | 10.80.72.109 – 10.80.72.110 | 10.80.72.111 |
| 29 | 10.80.72.112/30 | 10.80.72.113 – 10.80.72.114 | 10.80.72.115 |
| 30 | 10.80.72.116/30 | 10.80.72.117 – 10.80.72.118 | 10.80.72.119 |
| 31 | 10.80.72.120/30 | 10.80.72.121 – 10.80.72.122 | 10.80.72.123 |
| 32 | 10.80.72.124/30 | 10.80.72.125 – 10.80.72.126 | 10.80.72.127 |
| 33 | 10.80.72.128/30 | 10.80.72.129 – 10.80.72.130 | 10.80.72.131 |
| 34 | 10.80.72.132/30 | 10.80.72.133 – 10.80.72.134 | 10.80.72.135 |
| 35 | 10.80.72.136/30 | 10.80.72.137 – 10.80.72.138 | 10.80.72.139 |
| 36 | 10.80.72.140/30 | 10.80.72.141 – 10.80.72.142 | 10.80.72.143 |
| 37 | 10.80.72.144/30 | 10.80.72.145 – 10.80.72.146 | 10.80.72.147 |
| 38 | 10.80.72.148/30 | 10.80.72.149 – 10.80.72.150 | 10.80.72.151 |
| 39 | 10.80.72.152/30 | 10.80.72.153 – 10.80.72.154 | 10.80.72.155 |
| 40 | 10.80.72.156/30 | 10.80.72.157 – 10.80.72.158 | 10.80.72.159 |
| 41 | 10.80.72.160/30 | 10.80.72.161 – 10.80.72.162 | 10.80.72.163 |
| 42 | 10.80.72.164/30 | 10.80.72.165 – 10.80.72.166 | 10.80.72.167 |
| 43 | 10.80.72.168/30 | 10.80.72.169 – 10.80.72.170 | 10.80.72.171 |
| 44 | 10.80.72.172/30 | 10.80.72.173 – 10.80.72.174 | 10.80.72.175 |
| 45 | 10.80.72.176/30 | 10.80.72.177 – 10.80.72.178 | 10.80.72.179 |
| 46 | 10.80.72.180/30 | 10.80.72.181 – 10.80.72.182 | 10.80.72.183 |
| 47 | 10.80.72.184/30 | 10.80.72.185 – 10.80.72.186 | 10.80.72.187 |
| 48 | 10.80.72.188/30 | 10.80.72.189 – 10.80.72.190 | 10.80.72.191 |
| 49 | 10.80.72.192/30 | 10.80.72.193 – 10.80.72.194 | 10.80.72.195 |
| 50 | 10.80.72.196/30 | 10.80.72.197 – 10.80.72.198 | 10.80.72.199 |
| 51 | 10.80.72.200/30 | 10.80.72.201 – 10.80.72.202 | 10.80.72.203 |
| 52 | 10.80.72.204/30 | 10.80.72.205 – 10.80.72.206 | 10.80.72.207 |
| 53 | 10.80.72.208/30 | 10.80.72.209 – 10.80.72.210 | 10.80.72.211 |
| 54 | 10.80.72.212/30 | 10.80.72.213 – 10.80.72.214 | 10.80.72.215 |
| 55 | 10.80.72.216/30 | 10.80.72.217 – 10.80.72.218 | 10.80.72.219 |
| 56 | 10.80.72.220/30 | 10.80.72.221 – 10.80.72.222 | 10.80.72.223 |
| 57 | 10.80.72.224/30 | 10.80.72.225 – 10.80.72.226 | 10.80.72.227 |
| 58 | 10.80.72.228/30 | 10.80.72.229 – 10.80.72.230 | 10.80.72.231 |
| 59 | 10.80.72.232/30 | 10.80.72.233 – 10.80.72.234 | 10.80.72.235 |
| 60 | 10.80.72.236/30 | 10.80.72.237 – 10.80.72.238 | 10.80.72.239 |
| 61 | 10.80.72.240/30 | 10.80.72.241 – 10.80.72.242 | 10.80.72.243 |
| 62 | 10.80.72.244/30 | 10.80.72.245 – 10.80.72.246 | 10.80.72.247 |
| 63 | 10.80.72.248/30 | 10.80.72.249 – 10.80.72.250 | 10.80.72.251 |
| 64 | 10.80.72.252/30 | 10.80.72.253 – 10.80.72.254 | 10.80.72.255 |
| 65 | 10.80.73.0/30 | 10.80.73.1 – 10.80.73.2 | 10.80.73.3 |
| 66 | 10.80.73.4/30 | 10.80.73.5 – 10.80.73.6 | 10.80.73.7 |
| 67 | 10.80.73.8/30 | 10.80.73.9 – 10.80.73.10 | 10.80.73.11 |
| 68 | 10.80.73.12/30 | 10.80.73.13 – 10.80.73.14 | 10.80.73.15 |
| 69 | 10.80.73.16/30 | 10.80.73.17 – 10.80.73.18 | 10.80.73.19 |
| 70 | 10.80.73.20/30 | 10.80.73.21 – 10.80.73.22 | 10.80.73.23 |
| 71 | 10.80.73.24/30 | 10.80.73.25 – 10.80.73.26 | 10.80.73.27 |
| 72 | 10.80.73.28/30 | 10.80.73.29 – 10.80.73.30 | 10.80.73.31 |
| 73 | 10.80.73.32/30 | 10.80.73.33 – 10.80.73.34 | 10.80.73.35 |
| 74 | 10.80.73.36/30 | 10.80.73.37 – 10.80.73.38 | 10.80.73.39 |
| 75 | 10.80.73.40/30 | 10.80.73.41 – 10.80.73.42 | 10.80.73.43 |
| 76 | 10.80.73.44/30 | 10.80.73.45 – 10.80.73.46 | 10.80.73.47 |
| 77 | 10.80.73.48/30 | 10.80.73.49 – 10.80.73.50 | 10.80.73.51 |
| 78 | 10.80.73.52/30 | 10.80.73.53 – 10.80.73.54 | 10.80.73.55 |
| 79 | 10.80.73.56/30 | 10.80.73.57 – 10.80.73.58 | 10.80.73.59 |
| 80 | 10.80.73.60/30 | 10.80.73.61 – 10.80.73.62 | 10.80.73.63 |
| 81 | 10.80.73.64/30 | 10.80.73.65 – 10.80.73.66 | 10.80.73.67 |
| 82 | 10.80.73.68/30 | 10.80.73.69 – 10.80.73.70 | 10.80.73.71 |
| 83 | 10.80.73.72/30 | 10.80.73.73 – 10.80.73.74 | 10.80.73.75 |
| 84 | 10.80.73.76/30 | 10.80.73.77 – 10.80.73.78 | 10.80.73.79 |
| 85 | 10.80.73.80/30 | 10.80.73.81 – 10.80.73.82 | 10.80.73.83 |
| 86 | 10.80.73.84/30 | 10.80.73.85 – 10.80.73.86 | 10.80.73.87 |
| 87 | 10.80.73.88/30 | 10.80.73.89 – 10.80.73.90 | 10.80.73.91 |
| 88 | 10.80.73.92/30 | 10.80.73.93 – 10.80.73.94 | 10.80.73.95 |
| 89 | 10.80.73.96/30 | 10.80.73.97 – 10.80.73.98 | 10.80.73.99 |
| 90 | 10.80.73.100/30 | 10.80.73.101 – 10.80.73.102 | 10.80.73.103 |
| 91 | 10.80.73.104/30 | 10.80.73.105 – 10.80.73.106 | 10.80.73.107 |
| 92 | 10.80.73.108/30 | 10.80.73.109 – 10.80.73.110 | 10.80.73.111 |
| 93 | 10.80.73.112/30 | 10.80.73.113 – 10.80.73.114 | 10.80.73.115 |
| 94 | 10.80.73.116/30 | 10.80.73.117 – 10.80.73.118 | 10.80.73.119 |
| 95 | 10.80.73.120/30 | 10.80.73.121 – 10.80.73.122 | 10.80.73.123 |
| 96 | 10.80.73.124/30 | 10.80.73.125 – 10.80.73.126 | 10.80.73.127 |
| 97 | 10.80.73.128/30 | 10.80.73.129 – 10.80.73.130 | 10.80.73.131 |
| 98 | 10.80.73.132/30 | 10.80.73.133 – 10.80.73.134 | 10.80.73.135 |
| 99 | 10.80.73.136/30 | 10.80.73.137 – 10.80.73.138 | 10.80.73.139 |
| 100 | 10.80.73.140/30 | 10.80.73.141 – 10.80.73.142 | 10.80.73.143 |
| 101 | 10.80.73.144/30 | 10.80.73.145 – 10.80.73.146 | 10.80.73.147 |
| 102 | 10.80.73.148/30 | 10.80.73.149 – 10.80.73.150 | 10.80.73.151 |
| 103 | 10.80.73.152/30 | 10.80.73.153 – 10.80.73.154 | 10.80.73.155 |
| 104 | 10.80.73.156/30 | 10.80.73.157 – 10.80.73.158 | 10.80.73.159 |
| 105 | 10.80.73.160/30 | 10.80.73.161 – 10.80.73.162 | 10.80.73.163 |
| 106 | 10.80.73.164/30 | 10.80.73.165 – 10.80.73.166 | 10.80.73.167 |
| 107 | 10.80.73.168/30 | 10.80.73.169 – 10.80.73.170 | 10.80.73.171 |
| 108 | 10.80.73.172/30 | 10.80.73.173 – 10.80.73.174 | 10.80.73.175 |
| 109 | 10.80.73.176/30 | 10.80.73.177 – 10.80.73.178 | 10.80.73.179 |
| 110 | 10.80.73.180/30 | 10.80.73.181 – 10.80.73.182 | 10.80.73.183 |
| 111 | 10.80.73.184/30 | 10.80.73.185 – 10.80.73.186 | 10.80.73.187 |
| 112 | 10.80.73.188/30 | 10.80.73.189 – 10.80.73.190 | 10.80.73.191 |
| 113 | 10.80.73.192/30 | 10.80.73.193 – 10.80.73.194 | 10.80.73.195 |
| 114 | 10.80.73.196/30 | 10.80.73.197 – 10.80.73.198 | 10.80.73.199 |
| 115 | 10.80.73.200/30 | 10.80.73.201 – 10.80.73.202 | 10.80.73.203 |
| 116 | 10.80.73.204/30 | 10.80.73.205 – 10.80.73.206 | 10.80.73.207 |
| 117 | 10.80.73.208/30 | 10.80.73.209 – 10.80.73.210 | 10.80.73.211 |
| 118 | 10.80.73.212/30 | 10.80.73.213 – 10.80.73.214 | 10.80.73.215 |
| 119 | 10.80.73.216/30 | 10.80.73.217 – 10.80.73.218 | 10.80.73.219 |
| 120 | 10.80.73.220/30 | 10.80.73.221 – 10.80.73.222 | 10.80.73.223 |
| 121 | 10.80.73.224/30 | 10.80.73.225 – 10.80.73.226 | 10.80.73.227 |
| 122 | 10.80.73.228/30 | 10.80.73.229 – 10.80.73.230 | 10.80.73.231 |
| 123 | 10.80.73.232/30 | 10.80.73.233 – 10.80.73.234 | 10.80.73.235 |
| 124 | 10.80.73.236/30 | 10.80.73.237 – 10.80.73.238 | 10.80.73.239 |
| 125 | 10.80.73.240/30 | 10.80.73.241 – 10.80.73.242 | 10.80.73.243 |
| 126 | 10.80.73.244/30 | 10.80.73.245 – 10.80.73.246 | 10.80.73.247 |
| 127 | 10.80.73.248/30 | 10.80.73.249 – 10.80.73.250 | 10.80.73.251 |
| 128 | 10.80.73.252/30 | 10.80.73.253 – 10.80.73.254 | 10.80.73.255 |
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.