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)10.8.64.0/23
network10.8.64.0/23
broadcast10.8.65.255
first host10.8.64.1
last host10.8.65.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.8.64.0/23
address00001010.00001000.01000000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00001000.01000000.00000000
broadcast00001010.00001000.01000001.11111111
green = network part, grey = host part
hex0x0a084000
decimal168312832
reverse dns0.64.8.10.in-addr.arpa
ipv4-mapped::ffff:a08:4000
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.8.64.0/30 | 10.8.64.1 – 10.8.64.2 | 10.8.64.3 |
| 2 | 10.8.64.4/30 | 10.8.64.5 – 10.8.64.6 | 10.8.64.7 |
| 3 | 10.8.64.8/30 | 10.8.64.9 – 10.8.64.10 | 10.8.64.11 |
| 4 | 10.8.64.12/30 | 10.8.64.13 – 10.8.64.14 | 10.8.64.15 |
| 5 | 10.8.64.16/30 | 10.8.64.17 – 10.8.64.18 | 10.8.64.19 |
| 6 | 10.8.64.20/30 | 10.8.64.21 – 10.8.64.22 | 10.8.64.23 |
| 7 | 10.8.64.24/30 | 10.8.64.25 – 10.8.64.26 | 10.8.64.27 |
| 8 | 10.8.64.28/30 | 10.8.64.29 – 10.8.64.30 | 10.8.64.31 |
| 9 | 10.8.64.32/30 | 10.8.64.33 – 10.8.64.34 | 10.8.64.35 |
| 10 | 10.8.64.36/30 | 10.8.64.37 – 10.8.64.38 | 10.8.64.39 |
| 11 | 10.8.64.40/30 | 10.8.64.41 – 10.8.64.42 | 10.8.64.43 |
| 12 | 10.8.64.44/30 | 10.8.64.45 – 10.8.64.46 | 10.8.64.47 |
| 13 | 10.8.64.48/30 | 10.8.64.49 – 10.8.64.50 | 10.8.64.51 |
| 14 | 10.8.64.52/30 | 10.8.64.53 – 10.8.64.54 | 10.8.64.55 |
| 15 | 10.8.64.56/30 | 10.8.64.57 – 10.8.64.58 | 10.8.64.59 |
| 16 | 10.8.64.60/30 | 10.8.64.61 – 10.8.64.62 | 10.8.64.63 |
| 17 | 10.8.64.64/30 | 10.8.64.65 – 10.8.64.66 | 10.8.64.67 |
| 18 | 10.8.64.68/30 | 10.8.64.69 – 10.8.64.70 | 10.8.64.71 |
| 19 | 10.8.64.72/30 | 10.8.64.73 – 10.8.64.74 | 10.8.64.75 |
| 20 | 10.8.64.76/30 | 10.8.64.77 – 10.8.64.78 | 10.8.64.79 |
| 21 | 10.8.64.80/30 | 10.8.64.81 – 10.8.64.82 | 10.8.64.83 |
| 22 | 10.8.64.84/30 | 10.8.64.85 – 10.8.64.86 | 10.8.64.87 |
| 23 | 10.8.64.88/30 | 10.8.64.89 – 10.8.64.90 | 10.8.64.91 |
| 24 | 10.8.64.92/30 | 10.8.64.93 – 10.8.64.94 | 10.8.64.95 |
| 25 | 10.8.64.96/30 | 10.8.64.97 – 10.8.64.98 | 10.8.64.99 |
| 26 | 10.8.64.100/30 | 10.8.64.101 – 10.8.64.102 | 10.8.64.103 |
| 27 | 10.8.64.104/30 | 10.8.64.105 – 10.8.64.106 | 10.8.64.107 |
| 28 | 10.8.64.108/30 | 10.8.64.109 – 10.8.64.110 | 10.8.64.111 |
| 29 | 10.8.64.112/30 | 10.8.64.113 – 10.8.64.114 | 10.8.64.115 |
| 30 | 10.8.64.116/30 | 10.8.64.117 – 10.8.64.118 | 10.8.64.119 |
| 31 | 10.8.64.120/30 | 10.8.64.121 – 10.8.64.122 | 10.8.64.123 |
| 32 | 10.8.64.124/30 | 10.8.64.125 – 10.8.64.126 | 10.8.64.127 |
| 33 | 10.8.64.128/30 | 10.8.64.129 – 10.8.64.130 | 10.8.64.131 |
| 34 | 10.8.64.132/30 | 10.8.64.133 – 10.8.64.134 | 10.8.64.135 |
| 35 | 10.8.64.136/30 | 10.8.64.137 – 10.8.64.138 | 10.8.64.139 |
| 36 | 10.8.64.140/30 | 10.8.64.141 – 10.8.64.142 | 10.8.64.143 |
| 37 | 10.8.64.144/30 | 10.8.64.145 – 10.8.64.146 | 10.8.64.147 |
| 38 | 10.8.64.148/30 | 10.8.64.149 – 10.8.64.150 | 10.8.64.151 |
| 39 | 10.8.64.152/30 | 10.8.64.153 – 10.8.64.154 | 10.8.64.155 |
| 40 | 10.8.64.156/30 | 10.8.64.157 – 10.8.64.158 | 10.8.64.159 |
| 41 | 10.8.64.160/30 | 10.8.64.161 – 10.8.64.162 | 10.8.64.163 |
| 42 | 10.8.64.164/30 | 10.8.64.165 – 10.8.64.166 | 10.8.64.167 |
| 43 | 10.8.64.168/30 | 10.8.64.169 – 10.8.64.170 | 10.8.64.171 |
| 44 | 10.8.64.172/30 | 10.8.64.173 – 10.8.64.174 | 10.8.64.175 |
| 45 | 10.8.64.176/30 | 10.8.64.177 – 10.8.64.178 | 10.8.64.179 |
| 46 | 10.8.64.180/30 | 10.8.64.181 – 10.8.64.182 | 10.8.64.183 |
| 47 | 10.8.64.184/30 | 10.8.64.185 – 10.8.64.186 | 10.8.64.187 |
| 48 | 10.8.64.188/30 | 10.8.64.189 – 10.8.64.190 | 10.8.64.191 |
| 49 | 10.8.64.192/30 | 10.8.64.193 – 10.8.64.194 | 10.8.64.195 |
| 50 | 10.8.64.196/30 | 10.8.64.197 – 10.8.64.198 | 10.8.64.199 |
| 51 | 10.8.64.200/30 | 10.8.64.201 – 10.8.64.202 | 10.8.64.203 |
| 52 | 10.8.64.204/30 | 10.8.64.205 – 10.8.64.206 | 10.8.64.207 |
| 53 | 10.8.64.208/30 | 10.8.64.209 – 10.8.64.210 | 10.8.64.211 |
| 54 | 10.8.64.212/30 | 10.8.64.213 – 10.8.64.214 | 10.8.64.215 |
| 55 | 10.8.64.216/30 | 10.8.64.217 – 10.8.64.218 | 10.8.64.219 |
| 56 | 10.8.64.220/30 | 10.8.64.221 – 10.8.64.222 | 10.8.64.223 |
| 57 | 10.8.64.224/30 | 10.8.64.225 – 10.8.64.226 | 10.8.64.227 |
| 58 | 10.8.64.228/30 | 10.8.64.229 – 10.8.64.230 | 10.8.64.231 |
| 59 | 10.8.64.232/30 | 10.8.64.233 – 10.8.64.234 | 10.8.64.235 |
| 60 | 10.8.64.236/30 | 10.8.64.237 – 10.8.64.238 | 10.8.64.239 |
| 61 | 10.8.64.240/30 | 10.8.64.241 – 10.8.64.242 | 10.8.64.243 |
| 62 | 10.8.64.244/30 | 10.8.64.245 – 10.8.64.246 | 10.8.64.247 |
| 63 | 10.8.64.248/30 | 10.8.64.249 – 10.8.64.250 | 10.8.64.251 |
| 64 | 10.8.64.252/30 | 10.8.64.253 – 10.8.64.254 | 10.8.64.255 |
| 65 | 10.8.65.0/30 | 10.8.65.1 – 10.8.65.2 | 10.8.65.3 |
| 66 | 10.8.65.4/30 | 10.8.65.5 – 10.8.65.6 | 10.8.65.7 |
| 67 | 10.8.65.8/30 | 10.8.65.9 – 10.8.65.10 | 10.8.65.11 |
| 68 | 10.8.65.12/30 | 10.8.65.13 – 10.8.65.14 | 10.8.65.15 |
| 69 | 10.8.65.16/30 | 10.8.65.17 – 10.8.65.18 | 10.8.65.19 |
| 70 | 10.8.65.20/30 | 10.8.65.21 – 10.8.65.22 | 10.8.65.23 |
| 71 | 10.8.65.24/30 | 10.8.65.25 – 10.8.65.26 | 10.8.65.27 |
| 72 | 10.8.65.28/30 | 10.8.65.29 – 10.8.65.30 | 10.8.65.31 |
| 73 | 10.8.65.32/30 | 10.8.65.33 – 10.8.65.34 | 10.8.65.35 |
| 74 | 10.8.65.36/30 | 10.8.65.37 – 10.8.65.38 | 10.8.65.39 |
| 75 | 10.8.65.40/30 | 10.8.65.41 – 10.8.65.42 | 10.8.65.43 |
| 76 | 10.8.65.44/30 | 10.8.65.45 – 10.8.65.46 | 10.8.65.47 |
| 77 | 10.8.65.48/30 | 10.8.65.49 – 10.8.65.50 | 10.8.65.51 |
| 78 | 10.8.65.52/30 | 10.8.65.53 – 10.8.65.54 | 10.8.65.55 |
| 79 | 10.8.65.56/30 | 10.8.65.57 – 10.8.65.58 | 10.8.65.59 |
| 80 | 10.8.65.60/30 | 10.8.65.61 – 10.8.65.62 | 10.8.65.63 |
| 81 | 10.8.65.64/30 | 10.8.65.65 – 10.8.65.66 | 10.8.65.67 |
| 82 | 10.8.65.68/30 | 10.8.65.69 – 10.8.65.70 | 10.8.65.71 |
| 83 | 10.8.65.72/30 | 10.8.65.73 – 10.8.65.74 | 10.8.65.75 |
| 84 | 10.8.65.76/30 | 10.8.65.77 – 10.8.65.78 | 10.8.65.79 |
| 85 | 10.8.65.80/30 | 10.8.65.81 – 10.8.65.82 | 10.8.65.83 |
| 86 | 10.8.65.84/30 | 10.8.65.85 – 10.8.65.86 | 10.8.65.87 |
| 87 | 10.8.65.88/30 | 10.8.65.89 – 10.8.65.90 | 10.8.65.91 |
| 88 | 10.8.65.92/30 | 10.8.65.93 – 10.8.65.94 | 10.8.65.95 |
| 89 | 10.8.65.96/30 | 10.8.65.97 – 10.8.65.98 | 10.8.65.99 |
| 90 | 10.8.65.100/30 | 10.8.65.101 – 10.8.65.102 | 10.8.65.103 |
| 91 | 10.8.65.104/30 | 10.8.65.105 – 10.8.65.106 | 10.8.65.107 |
| 92 | 10.8.65.108/30 | 10.8.65.109 – 10.8.65.110 | 10.8.65.111 |
| 93 | 10.8.65.112/30 | 10.8.65.113 – 10.8.65.114 | 10.8.65.115 |
| 94 | 10.8.65.116/30 | 10.8.65.117 – 10.8.65.118 | 10.8.65.119 |
| 95 | 10.8.65.120/30 | 10.8.65.121 – 10.8.65.122 | 10.8.65.123 |
| 96 | 10.8.65.124/30 | 10.8.65.125 – 10.8.65.126 | 10.8.65.127 |
| 97 | 10.8.65.128/30 | 10.8.65.129 – 10.8.65.130 | 10.8.65.131 |
| 98 | 10.8.65.132/30 | 10.8.65.133 – 10.8.65.134 | 10.8.65.135 |
| 99 | 10.8.65.136/30 | 10.8.65.137 – 10.8.65.138 | 10.8.65.139 |
| 100 | 10.8.65.140/30 | 10.8.65.141 – 10.8.65.142 | 10.8.65.143 |
| 101 | 10.8.65.144/30 | 10.8.65.145 – 10.8.65.146 | 10.8.65.147 |
| 102 | 10.8.65.148/30 | 10.8.65.149 – 10.8.65.150 | 10.8.65.151 |
| 103 | 10.8.65.152/30 | 10.8.65.153 – 10.8.65.154 | 10.8.65.155 |
| 104 | 10.8.65.156/30 | 10.8.65.157 – 10.8.65.158 | 10.8.65.159 |
| 105 | 10.8.65.160/30 | 10.8.65.161 – 10.8.65.162 | 10.8.65.163 |
| 106 | 10.8.65.164/30 | 10.8.65.165 – 10.8.65.166 | 10.8.65.167 |
| 107 | 10.8.65.168/30 | 10.8.65.169 – 10.8.65.170 | 10.8.65.171 |
| 108 | 10.8.65.172/30 | 10.8.65.173 – 10.8.65.174 | 10.8.65.175 |
| 109 | 10.8.65.176/30 | 10.8.65.177 – 10.8.65.178 | 10.8.65.179 |
| 110 | 10.8.65.180/30 | 10.8.65.181 – 10.8.65.182 | 10.8.65.183 |
| 111 | 10.8.65.184/30 | 10.8.65.185 – 10.8.65.186 | 10.8.65.187 |
| 112 | 10.8.65.188/30 | 10.8.65.189 – 10.8.65.190 | 10.8.65.191 |
| 113 | 10.8.65.192/30 | 10.8.65.193 – 10.8.65.194 | 10.8.65.195 |
| 114 | 10.8.65.196/30 | 10.8.65.197 – 10.8.65.198 | 10.8.65.199 |
| 115 | 10.8.65.200/30 | 10.8.65.201 – 10.8.65.202 | 10.8.65.203 |
| 116 | 10.8.65.204/30 | 10.8.65.205 – 10.8.65.206 | 10.8.65.207 |
| 117 | 10.8.65.208/30 | 10.8.65.209 – 10.8.65.210 | 10.8.65.211 |
| 118 | 10.8.65.212/30 | 10.8.65.213 – 10.8.65.214 | 10.8.65.215 |
| 119 | 10.8.65.216/30 | 10.8.65.217 – 10.8.65.218 | 10.8.65.219 |
| 120 | 10.8.65.220/30 | 10.8.65.221 – 10.8.65.222 | 10.8.65.223 |
| 121 | 10.8.65.224/30 | 10.8.65.225 – 10.8.65.226 | 10.8.65.227 |
| 122 | 10.8.65.228/30 | 10.8.65.229 – 10.8.65.230 | 10.8.65.231 |
| 123 | 10.8.65.232/30 | 10.8.65.233 – 10.8.65.234 | 10.8.65.235 |
| 124 | 10.8.65.236/30 | 10.8.65.237 – 10.8.65.238 | 10.8.65.239 |
| 125 | 10.8.65.240/30 | 10.8.65.241 – 10.8.65.242 | 10.8.65.243 |
| 126 | 10.8.65.244/30 | 10.8.65.245 – 10.8.65.246 | 10.8.65.247 |
| 127 | 10.8.65.248/30 | 10.8.65.249 – 10.8.65.250 | 10.8.65.251 |
| 128 | 10.8.65.252/30 | 10.8.65.253 – 10.8.65.254 | 10.8.65.255 |
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.