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)10.63.36.0/23
network10.63.36.0/23
broadcast10.63.37.255
first host10.63.36.1
last host10.63.37.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.63.36.0/23
address00001010.00111111.00100100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00111111.00100100.00000000
broadcast00001010.00111111.00100101.11111111
green = network part, grey = host part
hex0x0a3f2400
decimal171910144
reverse dns0.36.63.10.in-addr.arpa
ipv4-mapped::ffff:a3f:2400
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.63.36.0/30 | 10.63.36.1 – 10.63.36.2 | 10.63.36.3 |
| 2 | 10.63.36.4/30 | 10.63.36.5 – 10.63.36.6 | 10.63.36.7 |
| 3 | 10.63.36.8/30 | 10.63.36.9 – 10.63.36.10 | 10.63.36.11 |
| 4 | 10.63.36.12/30 | 10.63.36.13 – 10.63.36.14 | 10.63.36.15 |
| 5 | 10.63.36.16/30 | 10.63.36.17 – 10.63.36.18 | 10.63.36.19 |
| 6 | 10.63.36.20/30 | 10.63.36.21 – 10.63.36.22 | 10.63.36.23 |
| 7 | 10.63.36.24/30 | 10.63.36.25 – 10.63.36.26 | 10.63.36.27 |
| 8 | 10.63.36.28/30 | 10.63.36.29 – 10.63.36.30 | 10.63.36.31 |
| 9 | 10.63.36.32/30 | 10.63.36.33 – 10.63.36.34 | 10.63.36.35 |
| 10 | 10.63.36.36/30 | 10.63.36.37 – 10.63.36.38 | 10.63.36.39 |
| 11 | 10.63.36.40/30 | 10.63.36.41 – 10.63.36.42 | 10.63.36.43 |
| 12 | 10.63.36.44/30 | 10.63.36.45 – 10.63.36.46 | 10.63.36.47 |
| 13 | 10.63.36.48/30 | 10.63.36.49 – 10.63.36.50 | 10.63.36.51 |
| 14 | 10.63.36.52/30 | 10.63.36.53 – 10.63.36.54 | 10.63.36.55 |
| 15 | 10.63.36.56/30 | 10.63.36.57 – 10.63.36.58 | 10.63.36.59 |
| 16 | 10.63.36.60/30 | 10.63.36.61 – 10.63.36.62 | 10.63.36.63 |
| 17 | 10.63.36.64/30 | 10.63.36.65 – 10.63.36.66 | 10.63.36.67 |
| 18 | 10.63.36.68/30 | 10.63.36.69 – 10.63.36.70 | 10.63.36.71 |
| 19 | 10.63.36.72/30 | 10.63.36.73 – 10.63.36.74 | 10.63.36.75 |
| 20 | 10.63.36.76/30 | 10.63.36.77 – 10.63.36.78 | 10.63.36.79 |
| 21 | 10.63.36.80/30 | 10.63.36.81 – 10.63.36.82 | 10.63.36.83 |
| 22 | 10.63.36.84/30 | 10.63.36.85 – 10.63.36.86 | 10.63.36.87 |
| 23 | 10.63.36.88/30 | 10.63.36.89 – 10.63.36.90 | 10.63.36.91 |
| 24 | 10.63.36.92/30 | 10.63.36.93 – 10.63.36.94 | 10.63.36.95 |
| 25 | 10.63.36.96/30 | 10.63.36.97 – 10.63.36.98 | 10.63.36.99 |
| 26 | 10.63.36.100/30 | 10.63.36.101 – 10.63.36.102 | 10.63.36.103 |
| 27 | 10.63.36.104/30 | 10.63.36.105 – 10.63.36.106 | 10.63.36.107 |
| 28 | 10.63.36.108/30 | 10.63.36.109 – 10.63.36.110 | 10.63.36.111 |
| 29 | 10.63.36.112/30 | 10.63.36.113 – 10.63.36.114 | 10.63.36.115 |
| 30 | 10.63.36.116/30 | 10.63.36.117 – 10.63.36.118 | 10.63.36.119 |
| 31 | 10.63.36.120/30 | 10.63.36.121 – 10.63.36.122 | 10.63.36.123 |
| 32 | 10.63.36.124/30 | 10.63.36.125 – 10.63.36.126 | 10.63.36.127 |
| 33 | 10.63.36.128/30 | 10.63.36.129 – 10.63.36.130 | 10.63.36.131 |
| 34 | 10.63.36.132/30 | 10.63.36.133 – 10.63.36.134 | 10.63.36.135 |
| 35 | 10.63.36.136/30 | 10.63.36.137 – 10.63.36.138 | 10.63.36.139 |
| 36 | 10.63.36.140/30 | 10.63.36.141 – 10.63.36.142 | 10.63.36.143 |
| 37 | 10.63.36.144/30 | 10.63.36.145 – 10.63.36.146 | 10.63.36.147 |
| 38 | 10.63.36.148/30 | 10.63.36.149 – 10.63.36.150 | 10.63.36.151 |
| 39 | 10.63.36.152/30 | 10.63.36.153 – 10.63.36.154 | 10.63.36.155 |
| 40 | 10.63.36.156/30 | 10.63.36.157 – 10.63.36.158 | 10.63.36.159 |
| 41 | 10.63.36.160/30 | 10.63.36.161 – 10.63.36.162 | 10.63.36.163 |
| 42 | 10.63.36.164/30 | 10.63.36.165 – 10.63.36.166 | 10.63.36.167 |
| 43 | 10.63.36.168/30 | 10.63.36.169 – 10.63.36.170 | 10.63.36.171 |
| 44 | 10.63.36.172/30 | 10.63.36.173 – 10.63.36.174 | 10.63.36.175 |
| 45 | 10.63.36.176/30 | 10.63.36.177 – 10.63.36.178 | 10.63.36.179 |
| 46 | 10.63.36.180/30 | 10.63.36.181 – 10.63.36.182 | 10.63.36.183 |
| 47 | 10.63.36.184/30 | 10.63.36.185 – 10.63.36.186 | 10.63.36.187 |
| 48 | 10.63.36.188/30 | 10.63.36.189 – 10.63.36.190 | 10.63.36.191 |
| 49 | 10.63.36.192/30 | 10.63.36.193 – 10.63.36.194 | 10.63.36.195 |
| 50 | 10.63.36.196/30 | 10.63.36.197 – 10.63.36.198 | 10.63.36.199 |
| 51 | 10.63.36.200/30 | 10.63.36.201 – 10.63.36.202 | 10.63.36.203 |
| 52 | 10.63.36.204/30 | 10.63.36.205 – 10.63.36.206 | 10.63.36.207 |
| 53 | 10.63.36.208/30 | 10.63.36.209 – 10.63.36.210 | 10.63.36.211 |
| 54 | 10.63.36.212/30 | 10.63.36.213 – 10.63.36.214 | 10.63.36.215 |
| 55 | 10.63.36.216/30 | 10.63.36.217 – 10.63.36.218 | 10.63.36.219 |
| 56 | 10.63.36.220/30 | 10.63.36.221 – 10.63.36.222 | 10.63.36.223 |
| 57 | 10.63.36.224/30 | 10.63.36.225 – 10.63.36.226 | 10.63.36.227 |
| 58 | 10.63.36.228/30 | 10.63.36.229 – 10.63.36.230 | 10.63.36.231 |
| 59 | 10.63.36.232/30 | 10.63.36.233 – 10.63.36.234 | 10.63.36.235 |
| 60 | 10.63.36.236/30 | 10.63.36.237 – 10.63.36.238 | 10.63.36.239 |
| 61 | 10.63.36.240/30 | 10.63.36.241 – 10.63.36.242 | 10.63.36.243 |
| 62 | 10.63.36.244/30 | 10.63.36.245 – 10.63.36.246 | 10.63.36.247 |
| 63 | 10.63.36.248/30 | 10.63.36.249 – 10.63.36.250 | 10.63.36.251 |
| 64 | 10.63.36.252/30 | 10.63.36.253 – 10.63.36.254 | 10.63.36.255 |
| 65 | 10.63.37.0/30 | 10.63.37.1 – 10.63.37.2 | 10.63.37.3 |
| 66 | 10.63.37.4/30 | 10.63.37.5 – 10.63.37.6 | 10.63.37.7 |
| 67 | 10.63.37.8/30 | 10.63.37.9 – 10.63.37.10 | 10.63.37.11 |
| 68 | 10.63.37.12/30 | 10.63.37.13 – 10.63.37.14 | 10.63.37.15 |
| 69 | 10.63.37.16/30 | 10.63.37.17 – 10.63.37.18 | 10.63.37.19 |
| 70 | 10.63.37.20/30 | 10.63.37.21 – 10.63.37.22 | 10.63.37.23 |
| 71 | 10.63.37.24/30 | 10.63.37.25 – 10.63.37.26 | 10.63.37.27 |
| 72 | 10.63.37.28/30 | 10.63.37.29 – 10.63.37.30 | 10.63.37.31 |
| 73 | 10.63.37.32/30 | 10.63.37.33 – 10.63.37.34 | 10.63.37.35 |
| 74 | 10.63.37.36/30 | 10.63.37.37 – 10.63.37.38 | 10.63.37.39 |
| 75 | 10.63.37.40/30 | 10.63.37.41 – 10.63.37.42 | 10.63.37.43 |
| 76 | 10.63.37.44/30 | 10.63.37.45 – 10.63.37.46 | 10.63.37.47 |
| 77 | 10.63.37.48/30 | 10.63.37.49 – 10.63.37.50 | 10.63.37.51 |
| 78 | 10.63.37.52/30 | 10.63.37.53 – 10.63.37.54 | 10.63.37.55 |
| 79 | 10.63.37.56/30 | 10.63.37.57 – 10.63.37.58 | 10.63.37.59 |
| 80 | 10.63.37.60/30 | 10.63.37.61 – 10.63.37.62 | 10.63.37.63 |
| 81 | 10.63.37.64/30 | 10.63.37.65 – 10.63.37.66 | 10.63.37.67 |
| 82 | 10.63.37.68/30 | 10.63.37.69 – 10.63.37.70 | 10.63.37.71 |
| 83 | 10.63.37.72/30 | 10.63.37.73 – 10.63.37.74 | 10.63.37.75 |
| 84 | 10.63.37.76/30 | 10.63.37.77 – 10.63.37.78 | 10.63.37.79 |
| 85 | 10.63.37.80/30 | 10.63.37.81 – 10.63.37.82 | 10.63.37.83 |
| 86 | 10.63.37.84/30 | 10.63.37.85 – 10.63.37.86 | 10.63.37.87 |
| 87 | 10.63.37.88/30 | 10.63.37.89 – 10.63.37.90 | 10.63.37.91 |
| 88 | 10.63.37.92/30 | 10.63.37.93 – 10.63.37.94 | 10.63.37.95 |
| 89 | 10.63.37.96/30 | 10.63.37.97 – 10.63.37.98 | 10.63.37.99 |
| 90 | 10.63.37.100/30 | 10.63.37.101 – 10.63.37.102 | 10.63.37.103 |
| 91 | 10.63.37.104/30 | 10.63.37.105 – 10.63.37.106 | 10.63.37.107 |
| 92 | 10.63.37.108/30 | 10.63.37.109 – 10.63.37.110 | 10.63.37.111 |
| 93 | 10.63.37.112/30 | 10.63.37.113 – 10.63.37.114 | 10.63.37.115 |
| 94 | 10.63.37.116/30 | 10.63.37.117 – 10.63.37.118 | 10.63.37.119 |
| 95 | 10.63.37.120/30 | 10.63.37.121 – 10.63.37.122 | 10.63.37.123 |
| 96 | 10.63.37.124/30 | 10.63.37.125 – 10.63.37.126 | 10.63.37.127 |
| 97 | 10.63.37.128/30 | 10.63.37.129 – 10.63.37.130 | 10.63.37.131 |
| 98 | 10.63.37.132/30 | 10.63.37.133 – 10.63.37.134 | 10.63.37.135 |
| 99 | 10.63.37.136/30 | 10.63.37.137 – 10.63.37.138 | 10.63.37.139 |
| 100 | 10.63.37.140/30 | 10.63.37.141 – 10.63.37.142 | 10.63.37.143 |
| 101 | 10.63.37.144/30 | 10.63.37.145 – 10.63.37.146 | 10.63.37.147 |
| 102 | 10.63.37.148/30 | 10.63.37.149 – 10.63.37.150 | 10.63.37.151 |
| 103 | 10.63.37.152/30 | 10.63.37.153 – 10.63.37.154 | 10.63.37.155 |
| 104 | 10.63.37.156/30 | 10.63.37.157 – 10.63.37.158 | 10.63.37.159 |
| 105 | 10.63.37.160/30 | 10.63.37.161 – 10.63.37.162 | 10.63.37.163 |
| 106 | 10.63.37.164/30 | 10.63.37.165 – 10.63.37.166 | 10.63.37.167 |
| 107 | 10.63.37.168/30 | 10.63.37.169 – 10.63.37.170 | 10.63.37.171 |
| 108 | 10.63.37.172/30 | 10.63.37.173 – 10.63.37.174 | 10.63.37.175 |
| 109 | 10.63.37.176/30 | 10.63.37.177 – 10.63.37.178 | 10.63.37.179 |
| 110 | 10.63.37.180/30 | 10.63.37.181 – 10.63.37.182 | 10.63.37.183 |
| 111 | 10.63.37.184/30 | 10.63.37.185 – 10.63.37.186 | 10.63.37.187 |
| 112 | 10.63.37.188/30 | 10.63.37.189 – 10.63.37.190 | 10.63.37.191 |
| 113 | 10.63.37.192/30 | 10.63.37.193 – 10.63.37.194 | 10.63.37.195 |
| 114 | 10.63.37.196/30 | 10.63.37.197 – 10.63.37.198 | 10.63.37.199 |
| 115 | 10.63.37.200/30 | 10.63.37.201 – 10.63.37.202 | 10.63.37.203 |
| 116 | 10.63.37.204/30 | 10.63.37.205 – 10.63.37.206 | 10.63.37.207 |
| 117 | 10.63.37.208/30 | 10.63.37.209 – 10.63.37.210 | 10.63.37.211 |
| 118 | 10.63.37.212/30 | 10.63.37.213 – 10.63.37.214 | 10.63.37.215 |
| 119 | 10.63.37.216/30 | 10.63.37.217 – 10.63.37.218 | 10.63.37.219 |
| 120 | 10.63.37.220/30 | 10.63.37.221 – 10.63.37.222 | 10.63.37.223 |
| 121 | 10.63.37.224/30 | 10.63.37.225 – 10.63.37.226 | 10.63.37.227 |
| 122 | 10.63.37.228/30 | 10.63.37.229 – 10.63.37.230 | 10.63.37.231 |
| 123 | 10.63.37.232/30 | 10.63.37.233 – 10.63.37.234 | 10.63.37.235 |
| 124 | 10.63.37.236/30 | 10.63.37.237 – 10.63.37.238 | 10.63.37.239 |
| 125 | 10.63.37.240/30 | 10.63.37.241 – 10.63.37.242 | 10.63.37.243 |
| 126 | 10.63.37.244/30 | 10.63.37.245 – 10.63.37.246 | 10.63.37.247 |
| 127 | 10.63.37.248/30 | 10.63.37.249 – 10.63.37.250 | 10.63.37.251 |
| 128 | 10.63.37.252/30 | 10.63.37.253 – 10.63.37.254 | 10.63.37.255 |
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.