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)10.0.192.0/23
network10.0.192.0/23
broadcast10.0.193.255
first host10.0.192.1
last host10.0.193.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.0.192.0/23
address00001010.00000000.11000000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000000.11000000.00000000
broadcast00001010.00000000.11000001.11111111
green = network part, grey = host part
hex0x0a00c000
decimal167821312
reverse dns0.192.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:c000
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.0.192.0/30 | 10.0.192.1 – 10.0.192.2 | 10.0.192.3 |
| 2 | 10.0.192.4/30 | 10.0.192.5 – 10.0.192.6 | 10.0.192.7 |
| 3 | 10.0.192.8/30 | 10.0.192.9 – 10.0.192.10 | 10.0.192.11 |
| 4 | 10.0.192.12/30 | 10.0.192.13 – 10.0.192.14 | 10.0.192.15 |
| 5 | 10.0.192.16/30 | 10.0.192.17 – 10.0.192.18 | 10.0.192.19 |
| 6 | 10.0.192.20/30 | 10.0.192.21 – 10.0.192.22 | 10.0.192.23 |
| 7 | 10.0.192.24/30 | 10.0.192.25 – 10.0.192.26 | 10.0.192.27 |
| 8 | 10.0.192.28/30 | 10.0.192.29 – 10.0.192.30 | 10.0.192.31 |
| 9 | 10.0.192.32/30 | 10.0.192.33 – 10.0.192.34 | 10.0.192.35 |
| 10 | 10.0.192.36/30 | 10.0.192.37 – 10.0.192.38 | 10.0.192.39 |
| 11 | 10.0.192.40/30 | 10.0.192.41 – 10.0.192.42 | 10.0.192.43 |
| 12 | 10.0.192.44/30 | 10.0.192.45 – 10.0.192.46 | 10.0.192.47 |
| 13 | 10.0.192.48/30 | 10.0.192.49 – 10.0.192.50 | 10.0.192.51 |
| 14 | 10.0.192.52/30 | 10.0.192.53 – 10.0.192.54 | 10.0.192.55 |
| 15 | 10.0.192.56/30 | 10.0.192.57 – 10.0.192.58 | 10.0.192.59 |
| 16 | 10.0.192.60/30 | 10.0.192.61 – 10.0.192.62 | 10.0.192.63 |
| 17 | 10.0.192.64/30 | 10.0.192.65 – 10.0.192.66 | 10.0.192.67 |
| 18 | 10.0.192.68/30 | 10.0.192.69 – 10.0.192.70 | 10.0.192.71 |
| 19 | 10.0.192.72/30 | 10.0.192.73 – 10.0.192.74 | 10.0.192.75 |
| 20 | 10.0.192.76/30 | 10.0.192.77 – 10.0.192.78 | 10.0.192.79 |
| 21 | 10.0.192.80/30 | 10.0.192.81 – 10.0.192.82 | 10.0.192.83 |
| 22 | 10.0.192.84/30 | 10.0.192.85 – 10.0.192.86 | 10.0.192.87 |
| 23 | 10.0.192.88/30 | 10.0.192.89 – 10.0.192.90 | 10.0.192.91 |
| 24 | 10.0.192.92/30 | 10.0.192.93 – 10.0.192.94 | 10.0.192.95 |
| 25 | 10.0.192.96/30 | 10.0.192.97 – 10.0.192.98 | 10.0.192.99 |
| 26 | 10.0.192.100/30 | 10.0.192.101 – 10.0.192.102 | 10.0.192.103 |
| 27 | 10.0.192.104/30 | 10.0.192.105 – 10.0.192.106 | 10.0.192.107 |
| 28 | 10.0.192.108/30 | 10.0.192.109 – 10.0.192.110 | 10.0.192.111 |
| 29 | 10.0.192.112/30 | 10.0.192.113 – 10.0.192.114 | 10.0.192.115 |
| 30 | 10.0.192.116/30 | 10.0.192.117 – 10.0.192.118 | 10.0.192.119 |
| 31 | 10.0.192.120/30 | 10.0.192.121 – 10.0.192.122 | 10.0.192.123 |
| 32 | 10.0.192.124/30 | 10.0.192.125 – 10.0.192.126 | 10.0.192.127 |
| 33 | 10.0.192.128/30 | 10.0.192.129 – 10.0.192.130 | 10.0.192.131 |
| 34 | 10.0.192.132/30 | 10.0.192.133 – 10.0.192.134 | 10.0.192.135 |
| 35 | 10.0.192.136/30 | 10.0.192.137 – 10.0.192.138 | 10.0.192.139 |
| 36 | 10.0.192.140/30 | 10.0.192.141 – 10.0.192.142 | 10.0.192.143 |
| 37 | 10.0.192.144/30 | 10.0.192.145 – 10.0.192.146 | 10.0.192.147 |
| 38 | 10.0.192.148/30 | 10.0.192.149 – 10.0.192.150 | 10.0.192.151 |
| 39 | 10.0.192.152/30 | 10.0.192.153 – 10.0.192.154 | 10.0.192.155 |
| 40 | 10.0.192.156/30 | 10.0.192.157 – 10.0.192.158 | 10.0.192.159 |
| 41 | 10.0.192.160/30 | 10.0.192.161 – 10.0.192.162 | 10.0.192.163 |
| 42 | 10.0.192.164/30 | 10.0.192.165 – 10.0.192.166 | 10.0.192.167 |
| 43 | 10.0.192.168/30 | 10.0.192.169 – 10.0.192.170 | 10.0.192.171 |
| 44 | 10.0.192.172/30 | 10.0.192.173 – 10.0.192.174 | 10.0.192.175 |
| 45 | 10.0.192.176/30 | 10.0.192.177 – 10.0.192.178 | 10.0.192.179 |
| 46 | 10.0.192.180/30 | 10.0.192.181 – 10.0.192.182 | 10.0.192.183 |
| 47 | 10.0.192.184/30 | 10.0.192.185 – 10.0.192.186 | 10.0.192.187 |
| 48 | 10.0.192.188/30 | 10.0.192.189 – 10.0.192.190 | 10.0.192.191 |
| 49 | 10.0.192.192/30 | 10.0.192.193 – 10.0.192.194 | 10.0.192.195 |
| 50 | 10.0.192.196/30 | 10.0.192.197 – 10.0.192.198 | 10.0.192.199 |
| 51 | 10.0.192.200/30 | 10.0.192.201 – 10.0.192.202 | 10.0.192.203 |
| 52 | 10.0.192.204/30 | 10.0.192.205 – 10.0.192.206 | 10.0.192.207 |
| 53 | 10.0.192.208/30 | 10.0.192.209 – 10.0.192.210 | 10.0.192.211 |
| 54 | 10.0.192.212/30 | 10.0.192.213 – 10.0.192.214 | 10.0.192.215 |
| 55 | 10.0.192.216/30 | 10.0.192.217 – 10.0.192.218 | 10.0.192.219 |
| 56 | 10.0.192.220/30 | 10.0.192.221 – 10.0.192.222 | 10.0.192.223 |
| 57 | 10.0.192.224/30 | 10.0.192.225 – 10.0.192.226 | 10.0.192.227 |
| 58 | 10.0.192.228/30 | 10.0.192.229 – 10.0.192.230 | 10.0.192.231 |
| 59 | 10.0.192.232/30 | 10.0.192.233 – 10.0.192.234 | 10.0.192.235 |
| 60 | 10.0.192.236/30 | 10.0.192.237 – 10.0.192.238 | 10.0.192.239 |
| 61 | 10.0.192.240/30 | 10.0.192.241 – 10.0.192.242 | 10.0.192.243 |
| 62 | 10.0.192.244/30 | 10.0.192.245 – 10.0.192.246 | 10.0.192.247 |
| 63 | 10.0.192.248/30 | 10.0.192.249 – 10.0.192.250 | 10.0.192.251 |
| 64 | 10.0.192.252/30 | 10.0.192.253 – 10.0.192.254 | 10.0.192.255 |
| 65 | 10.0.193.0/30 | 10.0.193.1 – 10.0.193.2 | 10.0.193.3 |
| 66 | 10.0.193.4/30 | 10.0.193.5 – 10.0.193.6 | 10.0.193.7 |
| 67 | 10.0.193.8/30 | 10.0.193.9 – 10.0.193.10 | 10.0.193.11 |
| 68 | 10.0.193.12/30 | 10.0.193.13 – 10.0.193.14 | 10.0.193.15 |
| 69 | 10.0.193.16/30 | 10.0.193.17 – 10.0.193.18 | 10.0.193.19 |
| 70 | 10.0.193.20/30 | 10.0.193.21 – 10.0.193.22 | 10.0.193.23 |
| 71 | 10.0.193.24/30 | 10.0.193.25 – 10.0.193.26 | 10.0.193.27 |
| 72 | 10.0.193.28/30 | 10.0.193.29 – 10.0.193.30 | 10.0.193.31 |
| 73 | 10.0.193.32/30 | 10.0.193.33 – 10.0.193.34 | 10.0.193.35 |
| 74 | 10.0.193.36/30 | 10.0.193.37 – 10.0.193.38 | 10.0.193.39 |
| 75 | 10.0.193.40/30 | 10.0.193.41 – 10.0.193.42 | 10.0.193.43 |
| 76 | 10.0.193.44/30 | 10.0.193.45 – 10.0.193.46 | 10.0.193.47 |
| 77 | 10.0.193.48/30 | 10.0.193.49 – 10.0.193.50 | 10.0.193.51 |
| 78 | 10.0.193.52/30 | 10.0.193.53 – 10.0.193.54 | 10.0.193.55 |
| 79 | 10.0.193.56/30 | 10.0.193.57 – 10.0.193.58 | 10.0.193.59 |
| 80 | 10.0.193.60/30 | 10.0.193.61 – 10.0.193.62 | 10.0.193.63 |
| 81 | 10.0.193.64/30 | 10.0.193.65 – 10.0.193.66 | 10.0.193.67 |
| 82 | 10.0.193.68/30 | 10.0.193.69 – 10.0.193.70 | 10.0.193.71 |
| 83 | 10.0.193.72/30 | 10.0.193.73 – 10.0.193.74 | 10.0.193.75 |
| 84 | 10.0.193.76/30 | 10.0.193.77 – 10.0.193.78 | 10.0.193.79 |
| 85 | 10.0.193.80/30 | 10.0.193.81 – 10.0.193.82 | 10.0.193.83 |
| 86 | 10.0.193.84/30 | 10.0.193.85 – 10.0.193.86 | 10.0.193.87 |
| 87 | 10.0.193.88/30 | 10.0.193.89 – 10.0.193.90 | 10.0.193.91 |
| 88 | 10.0.193.92/30 | 10.0.193.93 – 10.0.193.94 | 10.0.193.95 |
| 89 | 10.0.193.96/30 | 10.0.193.97 – 10.0.193.98 | 10.0.193.99 |
| 90 | 10.0.193.100/30 | 10.0.193.101 – 10.0.193.102 | 10.0.193.103 |
| 91 | 10.0.193.104/30 | 10.0.193.105 – 10.0.193.106 | 10.0.193.107 |
| 92 | 10.0.193.108/30 | 10.0.193.109 – 10.0.193.110 | 10.0.193.111 |
| 93 | 10.0.193.112/30 | 10.0.193.113 – 10.0.193.114 | 10.0.193.115 |
| 94 | 10.0.193.116/30 | 10.0.193.117 – 10.0.193.118 | 10.0.193.119 |
| 95 | 10.0.193.120/30 | 10.0.193.121 – 10.0.193.122 | 10.0.193.123 |
| 96 | 10.0.193.124/30 | 10.0.193.125 – 10.0.193.126 | 10.0.193.127 |
| 97 | 10.0.193.128/30 | 10.0.193.129 – 10.0.193.130 | 10.0.193.131 |
| 98 | 10.0.193.132/30 | 10.0.193.133 – 10.0.193.134 | 10.0.193.135 |
| 99 | 10.0.193.136/30 | 10.0.193.137 – 10.0.193.138 | 10.0.193.139 |
| 100 | 10.0.193.140/30 | 10.0.193.141 – 10.0.193.142 | 10.0.193.143 |
| 101 | 10.0.193.144/30 | 10.0.193.145 – 10.0.193.146 | 10.0.193.147 |
| 102 | 10.0.193.148/30 | 10.0.193.149 – 10.0.193.150 | 10.0.193.151 |
| 103 | 10.0.193.152/30 | 10.0.193.153 – 10.0.193.154 | 10.0.193.155 |
| 104 | 10.0.193.156/30 | 10.0.193.157 – 10.0.193.158 | 10.0.193.159 |
| 105 | 10.0.193.160/30 | 10.0.193.161 – 10.0.193.162 | 10.0.193.163 |
| 106 | 10.0.193.164/30 | 10.0.193.165 – 10.0.193.166 | 10.0.193.167 |
| 107 | 10.0.193.168/30 | 10.0.193.169 – 10.0.193.170 | 10.0.193.171 |
| 108 | 10.0.193.172/30 | 10.0.193.173 – 10.0.193.174 | 10.0.193.175 |
| 109 | 10.0.193.176/30 | 10.0.193.177 – 10.0.193.178 | 10.0.193.179 |
| 110 | 10.0.193.180/30 | 10.0.193.181 – 10.0.193.182 | 10.0.193.183 |
| 111 | 10.0.193.184/30 | 10.0.193.185 – 10.0.193.186 | 10.0.193.187 |
| 112 | 10.0.193.188/30 | 10.0.193.189 – 10.0.193.190 | 10.0.193.191 |
| 113 | 10.0.193.192/30 | 10.0.193.193 – 10.0.193.194 | 10.0.193.195 |
| 114 | 10.0.193.196/30 | 10.0.193.197 – 10.0.193.198 | 10.0.193.199 |
| 115 | 10.0.193.200/30 | 10.0.193.201 – 10.0.193.202 | 10.0.193.203 |
| 116 | 10.0.193.204/30 | 10.0.193.205 – 10.0.193.206 | 10.0.193.207 |
| 117 | 10.0.193.208/30 | 10.0.193.209 – 10.0.193.210 | 10.0.193.211 |
| 118 | 10.0.193.212/30 | 10.0.193.213 – 10.0.193.214 | 10.0.193.215 |
| 119 | 10.0.193.216/30 | 10.0.193.217 – 10.0.193.218 | 10.0.193.219 |
| 120 | 10.0.193.220/30 | 10.0.193.221 – 10.0.193.222 | 10.0.193.223 |
| 121 | 10.0.193.224/30 | 10.0.193.225 – 10.0.193.226 | 10.0.193.227 |
| 122 | 10.0.193.228/30 | 10.0.193.229 – 10.0.193.230 | 10.0.193.231 |
| 123 | 10.0.193.232/30 | 10.0.193.233 – 10.0.193.234 | 10.0.193.235 |
| 124 | 10.0.193.236/30 | 10.0.193.237 – 10.0.193.238 | 10.0.193.239 |
| 125 | 10.0.193.240/30 | 10.0.193.241 – 10.0.193.242 | 10.0.193.243 |
| 126 | 10.0.193.244/30 | 10.0.193.245 – 10.0.193.246 | 10.0.193.247 |
| 127 | 10.0.193.248/30 | 10.0.193.249 – 10.0.193.250 | 10.0.193.251 |
| 128 | 10.0.193.252/30 | 10.0.193.253 – 10.0.193.254 | 10.0.193.255 |
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.