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)10.63.136.0/23
network10.63.136.0/23
broadcast10.63.137.255
first host10.63.136.1
last host10.63.137.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.63.136.0/23
address00001010.00111111.10001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00111111.10001000.00000000
broadcast00001010.00111111.10001001.11111111
green = network part, grey = host part
hex0x0a3f8800
decimal171935744
reverse dns0.136.63.10.in-addr.arpa
ipv4-mapped::ffff:a3f:8800
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.63.136.0/30 | 10.63.136.1 – 10.63.136.2 | 10.63.136.3 |
| 2 | 10.63.136.4/30 | 10.63.136.5 – 10.63.136.6 | 10.63.136.7 |
| 3 | 10.63.136.8/30 | 10.63.136.9 – 10.63.136.10 | 10.63.136.11 |
| 4 | 10.63.136.12/30 | 10.63.136.13 – 10.63.136.14 | 10.63.136.15 |
| 5 | 10.63.136.16/30 | 10.63.136.17 – 10.63.136.18 | 10.63.136.19 |
| 6 | 10.63.136.20/30 | 10.63.136.21 – 10.63.136.22 | 10.63.136.23 |
| 7 | 10.63.136.24/30 | 10.63.136.25 – 10.63.136.26 | 10.63.136.27 |
| 8 | 10.63.136.28/30 | 10.63.136.29 – 10.63.136.30 | 10.63.136.31 |
| 9 | 10.63.136.32/30 | 10.63.136.33 – 10.63.136.34 | 10.63.136.35 |
| 10 | 10.63.136.36/30 | 10.63.136.37 – 10.63.136.38 | 10.63.136.39 |
| 11 | 10.63.136.40/30 | 10.63.136.41 – 10.63.136.42 | 10.63.136.43 |
| 12 | 10.63.136.44/30 | 10.63.136.45 – 10.63.136.46 | 10.63.136.47 |
| 13 | 10.63.136.48/30 | 10.63.136.49 – 10.63.136.50 | 10.63.136.51 |
| 14 | 10.63.136.52/30 | 10.63.136.53 – 10.63.136.54 | 10.63.136.55 |
| 15 | 10.63.136.56/30 | 10.63.136.57 – 10.63.136.58 | 10.63.136.59 |
| 16 | 10.63.136.60/30 | 10.63.136.61 – 10.63.136.62 | 10.63.136.63 |
| 17 | 10.63.136.64/30 | 10.63.136.65 – 10.63.136.66 | 10.63.136.67 |
| 18 | 10.63.136.68/30 | 10.63.136.69 – 10.63.136.70 | 10.63.136.71 |
| 19 | 10.63.136.72/30 | 10.63.136.73 – 10.63.136.74 | 10.63.136.75 |
| 20 | 10.63.136.76/30 | 10.63.136.77 – 10.63.136.78 | 10.63.136.79 |
| 21 | 10.63.136.80/30 | 10.63.136.81 – 10.63.136.82 | 10.63.136.83 |
| 22 | 10.63.136.84/30 | 10.63.136.85 – 10.63.136.86 | 10.63.136.87 |
| 23 | 10.63.136.88/30 | 10.63.136.89 – 10.63.136.90 | 10.63.136.91 |
| 24 | 10.63.136.92/30 | 10.63.136.93 – 10.63.136.94 | 10.63.136.95 |
| 25 | 10.63.136.96/30 | 10.63.136.97 – 10.63.136.98 | 10.63.136.99 |
| 26 | 10.63.136.100/30 | 10.63.136.101 – 10.63.136.102 | 10.63.136.103 |
| 27 | 10.63.136.104/30 | 10.63.136.105 – 10.63.136.106 | 10.63.136.107 |
| 28 | 10.63.136.108/30 | 10.63.136.109 – 10.63.136.110 | 10.63.136.111 |
| 29 | 10.63.136.112/30 | 10.63.136.113 – 10.63.136.114 | 10.63.136.115 |
| 30 | 10.63.136.116/30 | 10.63.136.117 – 10.63.136.118 | 10.63.136.119 |
| 31 | 10.63.136.120/30 | 10.63.136.121 – 10.63.136.122 | 10.63.136.123 |
| 32 | 10.63.136.124/30 | 10.63.136.125 – 10.63.136.126 | 10.63.136.127 |
| 33 | 10.63.136.128/30 | 10.63.136.129 – 10.63.136.130 | 10.63.136.131 |
| 34 | 10.63.136.132/30 | 10.63.136.133 – 10.63.136.134 | 10.63.136.135 |
| 35 | 10.63.136.136/30 | 10.63.136.137 – 10.63.136.138 | 10.63.136.139 |
| 36 | 10.63.136.140/30 | 10.63.136.141 – 10.63.136.142 | 10.63.136.143 |
| 37 | 10.63.136.144/30 | 10.63.136.145 – 10.63.136.146 | 10.63.136.147 |
| 38 | 10.63.136.148/30 | 10.63.136.149 – 10.63.136.150 | 10.63.136.151 |
| 39 | 10.63.136.152/30 | 10.63.136.153 – 10.63.136.154 | 10.63.136.155 |
| 40 | 10.63.136.156/30 | 10.63.136.157 – 10.63.136.158 | 10.63.136.159 |
| 41 | 10.63.136.160/30 | 10.63.136.161 – 10.63.136.162 | 10.63.136.163 |
| 42 | 10.63.136.164/30 | 10.63.136.165 – 10.63.136.166 | 10.63.136.167 |
| 43 | 10.63.136.168/30 | 10.63.136.169 – 10.63.136.170 | 10.63.136.171 |
| 44 | 10.63.136.172/30 | 10.63.136.173 – 10.63.136.174 | 10.63.136.175 |
| 45 | 10.63.136.176/30 | 10.63.136.177 – 10.63.136.178 | 10.63.136.179 |
| 46 | 10.63.136.180/30 | 10.63.136.181 – 10.63.136.182 | 10.63.136.183 |
| 47 | 10.63.136.184/30 | 10.63.136.185 – 10.63.136.186 | 10.63.136.187 |
| 48 | 10.63.136.188/30 | 10.63.136.189 – 10.63.136.190 | 10.63.136.191 |
| 49 | 10.63.136.192/30 | 10.63.136.193 – 10.63.136.194 | 10.63.136.195 |
| 50 | 10.63.136.196/30 | 10.63.136.197 – 10.63.136.198 | 10.63.136.199 |
| 51 | 10.63.136.200/30 | 10.63.136.201 – 10.63.136.202 | 10.63.136.203 |
| 52 | 10.63.136.204/30 | 10.63.136.205 – 10.63.136.206 | 10.63.136.207 |
| 53 | 10.63.136.208/30 | 10.63.136.209 – 10.63.136.210 | 10.63.136.211 |
| 54 | 10.63.136.212/30 | 10.63.136.213 – 10.63.136.214 | 10.63.136.215 |
| 55 | 10.63.136.216/30 | 10.63.136.217 – 10.63.136.218 | 10.63.136.219 |
| 56 | 10.63.136.220/30 | 10.63.136.221 – 10.63.136.222 | 10.63.136.223 |
| 57 | 10.63.136.224/30 | 10.63.136.225 – 10.63.136.226 | 10.63.136.227 |
| 58 | 10.63.136.228/30 | 10.63.136.229 – 10.63.136.230 | 10.63.136.231 |
| 59 | 10.63.136.232/30 | 10.63.136.233 – 10.63.136.234 | 10.63.136.235 |
| 60 | 10.63.136.236/30 | 10.63.136.237 – 10.63.136.238 | 10.63.136.239 |
| 61 | 10.63.136.240/30 | 10.63.136.241 – 10.63.136.242 | 10.63.136.243 |
| 62 | 10.63.136.244/30 | 10.63.136.245 – 10.63.136.246 | 10.63.136.247 |
| 63 | 10.63.136.248/30 | 10.63.136.249 – 10.63.136.250 | 10.63.136.251 |
| 64 | 10.63.136.252/30 | 10.63.136.253 – 10.63.136.254 | 10.63.136.255 |
| 65 | 10.63.137.0/30 | 10.63.137.1 – 10.63.137.2 | 10.63.137.3 |
| 66 | 10.63.137.4/30 | 10.63.137.5 – 10.63.137.6 | 10.63.137.7 |
| 67 | 10.63.137.8/30 | 10.63.137.9 – 10.63.137.10 | 10.63.137.11 |
| 68 | 10.63.137.12/30 | 10.63.137.13 – 10.63.137.14 | 10.63.137.15 |
| 69 | 10.63.137.16/30 | 10.63.137.17 – 10.63.137.18 | 10.63.137.19 |
| 70 | 10.63.137.20/30 | 10.63.137.21 – 10.63.137.22 | 10.63.137.23 |
| 71 | 10.63.137.24/30 | 10.63.137.25 – 10.63.137.26 | 10.63.137.27 |
| 72 | 10.63.137.28/30 | 10.63.137.29 – 10.63.137.30 | 10.63.137.31 |
| 73 | 10.63.137.32/30 | 10.63.137.33 – 10.63.137.34 | 10.63.137.35 |
| 74 | 10.63.137.36/30 | 10.63.137.37 – 10.63.137.38 | 10.63.137.39 |
| 75 | 10.63.137.40/30 | 10.63.137.41 – 10.63.137.42 | 10.63.137.43 |
| 76 | 10.63.137.44/30 | 10.63.137.45 – 10.63.137.46 | 10.63.137.47 |
| 77 | 10.63.137.48/30 | 10.63.137.49 – 10.63.137.50 | 10.63.137.51 |
| 78 | 10.63.137.52/30 | 10.63.137.53 – 10.63.137.54 | 10.63.137.55 |
| 79 | 10.63.137.56/30 | 10.63.137.57 – 10.63.137.58 | 10.63.137.59 |
| 80 | 10.63.137.60/30 | 10.63.137.61 – 10.63.137.62 | 10.63.137.63 |
| 81 | 10.63.137.64/30 | 10.63.137.65 – 10.63.137.66 | 10.63.137.67 |
| 82 | 10.63.137.68/30 | 10.63.137.69 – 10.63.137.70 | 10.63.137.71 |
| 83 | 10.63.137.72/30 | 10.63.137.73 – 10.63.137.74 | 10.63.137.75 |
| 84 | 10.63.137.76/30 | 10.63.137.77 – 10.63.137.78 | 10.63.137.79 |
| 85 | 10.63.137.80/30 | 10.63.137.81 – 10.63.137.82 | 10.63.137.83 |
| 86 | 10.63.137.84/30 | 10.63.137.85 – 10.63.137.86 | 10.63.137.87 |
| 87 | 10.63.137.88/30 | 10.63.137.89 – 10.63.137.90 | 10.63.137.91 |
| 88 | 10.63.137.92/30 | 10.63.137.93 – 10.63.137.94 | 10.63.137.95 |
| 89 | 10.63.137.96/30 | 10.63.137.97 – 10.63.137.98 | 10.63.137.99 |
| 90 | 10.63.137.100/30 | 10.63.137.101 – 10.63.137.102 | 10.63.137.103 |
| 91 | 10.63.137.104/30 | 10.63.137.105 – 10.63.137.106 | 10.63.137.107 |
| 92 | 10.63.137.108/30 | 10.63.137.109 – 10.63.137.110 | 10.63.137.111 |
| 93 | 10.63.137.112/30 | 10.63.137.113 – 10.63.137.114 | 10.63.137.115 |
| 94 | 10.63.137.116/30 | 10.63.137.117 – 10.63.137.118 | 10.63.137.119 |
| 95 | 10.63.137.120/30 | 10.63.137.121 – 10.63.137.122 | 10.63.137.123 |
| 96 | 10.63.137.124/30 | 10.63.137.125 – 10.63.137.126 | 10.63.137.127 |
| 97 | 10.63.137.128/30 | 10.63.137.129 – 10.63.137.130 | 10.63.137.131 |
| 98 | 10.63.137.132/30 | 10.63.137.133 – 10.63.137.134 | 10.63.137.135 |
| 99 | 10.63.137.136/30 | 10.63.137.137 – 10.63.137.138 | 10.63.137.139 |
| 100 | 10.63.137.140/30 | 10.63.137.141 – 10.63.137.142 | 10.63.137.143 |
| 101 | 10.63.137.144/30 | 10.63.137.145 – 10.63.137.146 | 10.63.137.147 |
| 102 | 10.63.137.148/30 | 10.63.137.149 – 10.63.137.150 | 10.63.137.151 |
| 103 | 10.63.137.152/30 | 10.63.137.153 – 10.63.137.154 | 10.63.137.155 |
| 104 | 10.63.137.156/30 | 10.63.137.157 – 10.63.137.158 | 10.63.137.159 |
| 105 | 10.63.137.160/30 | 10.63.137.161 – 10.63.137.162 | 10.63.137.163 |
| 106 | 10.63.137.164/30 | 10.63.137.165 – 10.63.137.166 | 10.63.137.167 |
| 107 | 10.63.137.168/30 | 10.63.137.169 – 10.63.137.170 | 10.63.137.171 |
| 108 | 10.63.137.172/30 | 10.63.137.173 – 10.63.137.174 | 10.63.137.175 |
| 109 | 10.63.137.176/30 | 10.63.137.177 – 10.63.137.178 | 10.63.137.179 |
| 110 | 10.63.137.180/30 | 10.63.137.181 – 10.63.137.182 | 10.63.137.183 |
| 111 | 10.63.137.184/30 | 10.63.137.185 – 10.63.137.186 | 10.63.137.187 |
| 112 | 10.63.137.188/30 | 10.63.137.189 – 10.63.137.190 | 10.63.137.191 |
| 113 | 10.63.137.192/30 | 10.63.137.193 – 10.63.137.194 | 10.63.137.195 |
| 114 | 10.63.137.196/30 | 10.63.137.197 – 10.63.137.198 | 10.63.137.199 |
| 115 | 10.63.137.200/30 | 10.63.137.201 – 10.63.137.202 | 10.63.137.203 |
| 116 | 10.63.137.204/30 | 10.63.137.205 – 10.63.137.206 | 10.63.137.207 |
| 117 | 10.63.137.208/30 | 10.63.137.209 – 10.63.137.210 | 10.63.137.211 |
| 118 | 10.63.137.212/30 | 10.63.137.213 – 10.63.137.214 | 10.63.137.215 |
| 119 | 10.63.137.216/30 | 10.63.137.217 – 10.63.137.218 | 10.63.137.219 |
| 120 | 10.63.137.220/30 | 10.63.137.221 – 10.63.137.222 | 10.63.137.223 |
| 121 | 10.63.137.224/30 | 10.63.137.225 – 10.63.137.226 | 10.63.137.227 |
| 122 | 10.63.137.228/30 | 10.63.137.229 – 10.63.137.230 | 10.63.137.231 |
| 123 | 10.63.137.232/30 | 10.63.137.233 – 10.63.137.234 | 10.63.137.235 |
| 124 | 10.63.137.236/30 | 10.63.137.237 – 10.63.137.238 | 10.63.137.239 |
| 125 | 10.63.137.240/30 | 10.63.137.241 – 10.63.137.242 | 10.63.137.243 |
| 126 | 10.63.137.244/30 | 10.63.137.245 – 10.63.137.246 | 10.63.137.247 |
| 127 | 10.63.137.248/30 | 10.63.137.249 – 10.63.137.250 | 10.63.137.251 |
| 128 | 10.63.137.252/30 | 10.63.137.253 – 10.63.137.254 | 10.63.137.255 |
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.