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)10.80.8.0/23
network10.80.8.0/23
broadcast10.80.9.255
first host10.80.8.1
last host10.80.9.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.80.8.0/23
address00001010.01010000.00001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010000.00001000.00000000
broadcast00001010.01010000.00001001.11111111
green = network part, grey = host part
hex0x0a500800
decimal173017088
reverse dns0.8.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:800
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.80.8.0/30 | 10.80.8.1 – 10.80.8.2 | 10.80.8.3 |
| 2 | 10.80.8.4/30 | 10.80.8.5 – 10.80.8.6 | 10.80.8.7 |
| 3 | 10.80.8.8/30 | 10.80.8.9 – 10.80.8.10 | 10.80.8.11 |
| 4 | 10.80.8.12/30 | 10.80.8.13 – 10.80.8.14 | 10.80.8.15 |
| 5 | 10.80.8.16/30 | 10.80.8.17 – 10.80.8.18 | 10.80.8.19 |
| 6 | 10.80.8.20/30 | 10.80.8.21 – 10.80.8.22 | 10.80.8.23 |
| 7 | 10.80.8.24/30 | 10.80.8.25 – 10.80.8.26 | 10.80.8.27 |
| 8 | 10.80.8.28/30 | 10.80.8.29 – 10.80.8.30 | 10.80.8.31 |
| 9 | 10.80.8.32/30 | 10.80.8.33 – 10.80.8.34 | 10.80.8.35 |
| 10 | 10.80.8.36/30 | 10.80.8.37 – 10.80.8.38 | 10.80.8.39 |
| 11 | 10.80.8.40/30 | 10.80.8.41 – 10.80.8.42 | 10.80.8.43 |
| 12 | 10.80.8.44/30 | 10.80.8.45 – 10.80.8.46 | 10.80.8.47 |
| 13 | 10.80.8.48/30 | 10.80.8.49 – 10.80.8.50 | 10.80.8.51 |
| 14 | 10.80.8.52/30 | 10.80.8.53 – 10.80.8.54 | 10.80.8.55 |
| 15 | 10.80.8.56/30 | 10.80.8.57 – 10.80.8.58 | 10.80.8.59 |
| 16 | 10.80.8.60/30 | 10.80.8.61 – 10.80.8.62 | 10.80.8.63 |
| 17 | 10.80.8.64/30 | 10.80.8.65 – 10.80.8.66 | 10.80.8.67 |
| 18 | 10.80.8.68/30 | 10.80.8.69 – 10.80.8.70 | 10.80.8.71 |
| 19 | 10.80.8.72/30 | 10.80.8.73 – 10.80.8.74 | 10.80.8.75 |
| 20 | 10.80.8.76/30 | 10.80.8.77 – 10.80.8.78 | 10.80.8.79 |
| 21 | 10.80.8.80/30 | 10.80.8.81 – 10.80.8.82 | 10.80.8.83 |
| 22 | 10.80.8.84/30 | 10.80.8.85 – 10.80.8.86 | 10.80.8.87 |
| 23 | 10.80.8.88/30 | 10.80.8.89 – 10.80.8.90 | 10.80.8.91 |
| 24 | 10.80.8.92/30 | 10.80.8.93 – 10.80.8.94 | 10.80.8.95 |
| 25 | 10.80.8.96/30 | 10.80.8.97 – 10.80.8.98 | 10.80.8.99 |
| 26 | 10.80.8.100/30 | 10.80.8.101 – 10.80.8.102 | 10.80.8.103 |
| 27 | 10.80.8.104/30 | 10.80.8.105 – 10.80.8.106 | 10.80.8.107 |
| 28 | 10.80.8.108/30 | 10.80.8.109 – 10.80.8.110 | 10.80.8.111 |
| 29 | 10.80.8.112/30 | 10.80.8.113 – 10.80.8.114 | 10.80.8.115 |
| 30 | 10.80.8.116/30 | 10.80.8.117 – 10.80.8.118 | 10.80.8.119 |
| 31 | 10.80.8.120/30 | 10.80.8.121 – 10.80.8.122 | 10.80.8.123 |
| 32 | 10.80.8.124/30 | 10.80.8.125 – 10.80.8.126 | 10.80.8.127 |
| 33 | 10.80.8.128/30 | 10.80.8.129 – 10.80.8.130 | 10.80.8.131 |
| 34 | 10.80.8.132/30 | 10.80.8.133 – 10.80.8.134 | 10.80.8.135 |
| 35 | 10.80.8.136/30 | 10.80.8.137 – 10.80.8.138 | 10.80.8.139 |
| 36 | 10.80.8.140/30 | 10.80.8.141 – 10.80.8.142 | 10.80.8.143 |
| 37 | 10.80.8.144/30 | 10.80.8.145 – 10.80.8.146 | 10.80.8.147 |
| 38 | 10.80.8.148/30 | 10.80.8.149 – 10.80.8.150 | 10.80.8.151 |
| 39 | 10.80.8.152/30 | 10.80.8.153 – 10.80.8.154 | 10.80.8.155 |
| 40 | 10.80.8.156/30 | 10.80.8.157 – 10.80.8.158 | 10.80.8.159 |
| 41 | 10.80.8.160/30 | 10.80.8.161 – 10.80.8.162 | 10.80.8.163 |
| 42 | 10.80.8.164/30 | 10.80.8.165 – 10.80.8.166 | 10.80.8.167 |
| 43 | 10.80.8.168/30 | 10.80.8.169 – 10.80.8.170 | 10.80.8.171 |
| 44 | 10.80.8.172/30 | 10.80.8.173 – 10.80.8.174 | 10.80.8.175 |
| 45 | 10.80.8.176/30 | 10.80.8.177 – 10.80.8.178 | 10.80.8.179 |
| 46 | 10.80.8.180/30 | 10.80.8.181 – 10.80.8.182 | 10.80.8.183 |
| 47 | 10.80.8.184/30 | 10.80.8.185 – 10.80.8.186 | 10.80.8.187 |
| 48 | 10.80.8.188/30 | 10.80.8.189 – 10.80.8.190 | 10.80.8.191 |
| 49 | 10.80.8.192/30 | 10.80.8.193 – 10.80.8.194 | 10.80.8.195 |
| 50 | 10.80.8.196/30 | 10.80.8.197 – 10.80.8.198 | 10.80.8.199 |
| 51 | 10.80.8.200/30 | 10.80.8.201 – 10.80.8.202 | 10.80.8.203 |
| 52 | 10.80.8.204/30 | 10.80.8.205 – 10.80.8.206 | 10.80.8.207 |
| 53 | 10.80.8.208/30 | 10.80.8.209 – 10.80.8.210 | 10.80.8.211 |
| 54 | 10.80.8.212/30 | 10.80.8.213 – 10.80.8.214 | 10.80.8.215 |
| 55 | 10.80.8.216/30 | 10.80.8.217 – 10.80.8.218 | 10.80.8.219 |
| 56 | 10.80.8.220/30 | 10.80.8.221 – 10.80.8.222 | 10.80.8.223 |
| 57 | 10.80.8.224/30 | 10.80.8.225 – 10.80.8.226 | 10.80.8.227 |
| 58 | 10.80.8.228/30 | 10.80.8.229 – 10.80.8.230 | 10.80.8.231 |
| 59 | 10.80.8.232/30 | 10.80.8.233 – 10.80.8.234 | 10.80.8.235 |
| 60 | 10.80.8.236/30 | 10.80.8.237 – 10.80.8.238 | 10.80.8.239 |
| 61 | 10.80.8.240/30 | 10.80.8.241 – 10.80.8.242 | 10.80.8.243 |
| 62 | 10.80.8.244/30 | 10.80.8.245 – 10.80.8.246 | 10.80.8.247 |
| 63 | 10.80.8.248/30 | 10.80.8.249 – 10.80.8.250 | 10.80.8.251 |
| 64 | 10.80.8.252/30 | 10.80.8.253 – 10.80.8.254 | 10.80.8.255 |
| 65 | 10.80.9.0/30 | 10.80.9.1 – 10.80.9.2 | 10.80.9.3 |
| 66 | 10.80.9.4/30 | 10.80.9.5 – 10.80.9.6 | 10.80.9.7 |
| 67 | 10.80.9.8/30 | 10.80.9.9 – 10.80.9.10 | 10.80.9.11 |
| 68 | 10.80.9.12/30 | 10.80.9.13 – 10.80.9.14 | 10.80.9.15 |
| 69 | 10.80.9.16/30 | 10.80.9.17 – 10.80.9.18 | 10.80.9.19 |
| 70 | 10.80.9.20/30 | 10.80.9.21 – 10.80.9.22 | 10.80.9.23 |
| 71 | 10.80.9.24/30 | 10.80.9.25 – 10.80.9.26 | 10.80.9.27 |
| 72 | 10.80.9.28/30 | 10.80.9.29 – 10.80.9.30 | 10.80.9.31 |
| 73 | 10.80.9.32/30 | 10.80.9.33 – 10.80.9.34 | 10.80.9.35 |
| 74 | 10.80.9.36/30 | 10.80.9.37 – 10.80.9.38 | 10.80.9.39 |
| 75 | 10.80.9.40/30 | 10.80.9.41 – 10.80.9.42 | 10.80.9.43 |
| 76 | 10.80.9.44/30 | 10.80.9.45 – 10.80.9.46 | 10.80.9.47 |
| 77 | 10.80.9.48/30 | 10.80.9.49 – 10.80.9.50 | 10.80.9.51 |
| 78 | 10.80.9.52/30 | 10.80.9.53 – 10.80.9.54 | 10.80.9.55 |
| 79 | 10.80.9.56/30 | 10.80.9.57 – 10.80.9.58 | 10.80.9.59 |
| 80 | 10.80.9.60/30 | 10.80.9.61 – 10.80.9.62 | 10.80.9.63 |
| 81 | 10.80.9.64/30 | 10.80.9.65 – 10.80.9.66 | 10.80.9.67 |
| 82 | 10.80.9.68/30 | 10.80.9.69 – 10.80.9.70 | 10.80.9.71 |
| 83 | 10.80.9.72/30 | 10.80.9.73 – 10.80.9.74 | 10.80.9.75 |
| 84 | 10.80.9.76/30 | 10.80.9.77 – 10.80.9.78 | 10.80.9.79 |
| 85 | 10.80.9.80/30 | 10.80.9.81 – 10.80.9.82 | 10.80.9.83 |
| 86 | 10.80.9.84/30 | 10.80.9.85 – 10.80.9.86 | 10.80.9.87 |
| 87 | 10.80.9.88/30 | 10.80.9.89 – 10.80.9.90 | 10.80.9.91 |
| 88 | 10.80.9.92/30 | 10.80.9.93 – 10.80.9.94 | 10.80.9.95 |
| 89 | 10.80.9.96/30 | 10.80.9.97 – 10.80.9.98 | 10.80.9.99 |
| 90 | 10.80.9.100/30 | 10.80.9.101 – 10.80.9.102 | 10.80.9.103 |
| 91 | 10.80.9.104/30 | 10.80.9.105 – 10.80.9.106 | 10.80.9.107 |
| 92 | 10.80.9.108/30 | 10.80.9.109 – 10.80.9.110 | 10.80.9.111 |
| 93 | 10.80.9.112/30 | 10.80.9.113 – 10.80.9.114 | 10.80.9.115 |
| 94 | 10.80.9.116/30 | 10.80.9.117 – 10.80.9.118 | 10.80.9.119 |
| 95 | 10.80.9.120/30 | 10.80.9.121 – 10.80.9.122 | 10.80.9.123 |
| 96 | 10.80.9.124/30 | 10.80.9.125 – 10.80.9.126 | 10.80.9.127 |
| 97 | 10.80.9.128/30 | 10.80.9.129 – 10.80.9.130 | 10.80.9.131 |
| 98 | 10.80.9.132/30 | 10.80.9.133 – 10.80.9.134 | 10.80.9.135 |
| 99 | 10.80.9.136/30 | 10.80.9.137 – 10.80.9.138 | 10.80.9.139 |
| 100 | 10.80.9.140/30 | 10.80.9.141 – 10.80.9.142 | 10.80.9.143 |
| 101 | 10.80.9.144/30 | 10.80.9.145 – 10.80.9.146 | 10.80.9.147 |
| 102 | 10.80.9.148/30 | 10.80.9.149 – 10.80.9.150 | 10.80.9.151 |
| 103 | 10.80.9.152/30 | 10.80.9.153 – 10.80.9.154 | 10.80.9.155 |
| 104 | 10.80.9.156/30 | 10.80.9.157 – 10.80.9.158 | 10.80.9.159 |
| 105 | 10.80.9.160/30 | 10.80.9.161 – 10.80.9.162 | 10.80.9.163 |
| 106 | 10.80.9.164/30 | 10.80.9.165 – 10.80.9.166 | 10.80.9.167 |
| 107 | 10.80.9.168/30 | 10.80.9.169 – 10.80.9.170 | 10.80.9.171 |
| 108 | 10.80.9.172/30 | 10.80.9.173 – 10.80.9.174 | 10.80.9.175 |
| 109 | 10.80.9.176/30 | 10.80.9.177 – 10.80.9.178 | 10.80.9.179 |
| 110 | 10.80.9.180/30 | 10.80.9.181 – 10.80.9.182 | 10.80.9.183 |
| 111 | 10.80.9.184/30 | 10.80.9.185 – 10.80.9.186 | 10.80.9.187 |
| 112 | 10.80.9.188/30 | 10.80.9.189 – 10.80.9.190 | 10.80.9.191 |
| 113 | 10.80.9.192/30 | 10.80.9.193 – 10.80.9.194 | 10.80.9.195 |
| 114 | 10.80.9.196/30 | 10.80.9.197 – 10.80.9.198 | 10.80.9.199 |
| 115 | 10.80.9.200/30 | 10.80.9.201 – 10.80.9.202 | 10.80.9.203 |
| 116 | 10.80.9.204/30 | 10.80.9.205 – 10.80.9.206 | 10.80.9.207 |
| 117 | 10.80.9.208/30 | 10.80.9.209 – 10.80.9.210 | 10.80.9.211 |
| 118 | 10.80.9.212/30 | 10.80.9.213 – 10.80.9.214 | 10.80.9.215 |
| 119 | 10.80.9.216/30 | 10.80.9.217 – 10.80.9.218 | 10.80.9.219 |
| 120 | 10.80.9.220/30 | 10.80.9.221 – 10.80.9.222 | 10.80.9.223 |
| 121 | 10.80.9.224/30 | 10.80.9.225 – 10.80.9.226 | 10.80.9.227 |
| 122 | 10.80.9.228/30 | 10.80.9.229 – 10.80.9.230 | 10.80.9.231 |
| 123 | 10.80.9.232/30 | 10.80.9.233 – 10.80.9.234 | 10.80.9.235 |
| 124 | 10.80.9.236/30 | 10.80.9.237 – 10.80.9.238 | 10.80.9.239 |
| 125 | 10.80.9.240/30 | 10.80.9.241 – 10.80.9.242 | 10.80.9.243 |
| 126 | 10.80.9.244/30 | 10.80.9.245 – 10.80.9.246 | 10.80.9.247 |
| 127 | 10.80.9.248/30 | 10.80.9.249 – 10.80.9.250 | 10.80.9.251 |
| 128 | 10.80.9.252/30 | 10.80.9.253 – 10.80.9.254 | 10.80.9.255 |
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.