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)10.231.99.0/24
network10.231.99.0/24
broadcast10.231.99.255
first host10.231.99.1
last host10.231.99.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.231.99.0/24
address00001010.11100111.01100011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.11100111.01100011.00000000
broadcast00001010.11100111.01100011.11111111
green = network part, grey = host part
hex0x0ae76300
decimal182936320
reverse dns0.99.231.10.in-addr.arpa
ipv4-mapped::ffff:ae7:6300
/24 split into /31 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.231.99.0/31 | 10.231.99.0 – 10.231.99.1 | 10.231.99.1 |
| 2 | 10.231.99.2/31 | 10.231.99.2 – 10.231.99.3 | 10.231.99.3 |
| 3 | 10.231.99.4/31 | 10.231.99.4 – 10.231.99.5 | 10.231.99.5 |
| 4 | 10.231.99.6/31 | 10.231.99.6 – 10.231.99.7 | 10.231.99.7 |
| 5 | 10.231.99.8/31 | 10.231.99.8 – 10.231.99.9 | 10.231.99.9 |
| 6 | 10.231.99.10/31 | 10.231.99.10 – 10.231.99.11 | 10.231.99.11 |
| 7 | 10.231.99.12/31 | 10.231.99.12 – 10.231.99.13 | 10.231.99.13 |
| 8 | 10.231.99.14/31 | 10.231.99.14 – 10.231.99.15 | 10.231.99.15 |
| 9 | 10.231.99.16/31 | 10.231.99.16 – 10.231.99.17 | 10.231.99.17 |
| 10 | 10.231.99.18/31 | 10.231.99.18 – 10.231.99.19 | 10.231.99.19 |
| 11 | 10.231.99.20/31 | 10.231.99.20 – 10.231.99.21 | 10.231.99.21 |
| 12 | 10.231.99.22/31 | 10.231.99.22 – 10.231.99.23 | 10.231.99.23 |
| 13 | 10.231.99.24/31 | 10.231.99.24 – 10.231.99.25 | 10.231.99.25 |
| 14 | 10.231.99.26/31 | 10.231.99.26 – 10.231.99.27 | 10.231.99.27 |
| 15 | 10.231.99.28/31 | 10.231.99.28 – 10.231.99.29 | 10.231.99.29 |
| 16 | 10.231.99.30/31 | 10.231.99.30 – 10.231.99.31 | 10.231.99.31 |
| 17 | 10.231.99.32/31 | 10.231.99.32 – 10.231.99.33 | 10.231.99.33 |
| 18 | 10.231.99.34/31 | 10.231.99.34 – 10.231.99.35 | 10.231.99.35 |
| 19 | 10.231.99.36/31 | 10.231.99.36 – 10.231.99.37 | 10.231.99.37 |
| 20 | 10.231.99.38/31 | 10.231.99.38 – 10.231.99.39 | 10.231.99.39 |
| 21 | 10.231.99.40/31 | 10.231.99.40 – 10.231.99.41 | 10.231.99.41 |
| 22 | 10.231.99.42/31 | 10.231.99.42 – 10.231.99.43 | 10.231.99.43 |
| 23 | 10.231.99.44/31 | 10.231.99.44 – 10.231.99.45 | 10.231.99.45 |
| 24 | 10.231.99.46/31 | 10.231.99.46 – 10.231.99.47 | 10.231.99.47 |
| 25 | 10.231.99.48/31 | 10.231.99.48 – 10.231.99.49 | 10.231.99.49 |
| 26 | 10.231.99.50/31 | 10.231.99.50 – 10.231.99.51 | 10.231.99.51 |
| 27 | 10.231.99.52/31 | 10.231.99.52 – 10.231.99.53 | 10.231.99.53 |
| 28 | 10.231.99.54/31 | 10.231.99.54 – 10.231.99.55 | 10.231.99.55 |
| 29 | 10.231.99.56/31 | 10.231.99.56 – 10.231.99.57 | 10.231.99.57 |
| 30 | 10.231.99.58/31 | 10.231.99.58 – 10.231.99.59 | 10.231.99.59 |
| 31 | 10.231.99.60/31 | 10.231.99.60 – 10.231.99.61 | 10.231.99.61 |
| 32 | 10.231.99.62/31 | 10.231.99.62 – 10.231.99.63 | 10.231.99.63 |
| 33 | 10.231.99.64/31 | 10.231.99.64 – 10.231.99.65 | 10.231.99.65 |
| 34 | 10.231.99.66/31 | 10.231.99.66 – 10.231.99.67 | 10.231.99.67 |
| 35 | 10.231.99.68/31 | 10.231.99.68 – 10.231.99.69 | 10.231.99.69 |
| 36 | 10.231.99.70/31 | 10.231.99.70 – 10.231.99.71 | 10.231.99.71 |
| 37 | 10.231.99.72/31 | 10.231.99.72 – 10.231.99.73 | 10.231.99.73 |
| 38 | 10.231.99.74/31 | 10.231.99.74 – 10.231.99.75 | 10.231.99.75 |
| 39 | 10.231.99.76/31 | 10.231.99.76 – 10.231.99.77 | 10.231.99.77 |
| 40 | 10.231.99.78/31 | 10.231.99.78 – 10.231.99.79 | 10.231.99.79 |
| 41 | 10.231.99.80/31 | 10.231.99.80 – 10.231.99.81 | 10.231.99.81 |
| 42 | 10.231.99.82/31 | 10.231.99.82 – 10.231.99.83 | 10.231.99.83 |
| 43 | 10.231.99.84/31 | 10.231.99.84 – 10.231.99.85 | 10.231.99.85 |
| 44 | 10.231.99.86/31 | 10.231.99.86 – 10.231.99.87 | 10.231.99.87 |
| 45 | 10.231.99.88/31 | 10.231.99.88 – 10.231.99.89 | 10.231.99.89 |
| 46 | 10.231.99.90/31 | 10.231.99.90 – 10.231.99.91 | 10.231.99.91 |
| 47 | 10.231.99.92/31 | 10.231.99.92 – 10.231.99.93 | 10.231.99.93 |
| 48 | 10.231.99.94/31 | 10.231.99.94 – 10.231.99.95 | 10.231.99.95 |
| 49 | 10.231.99.96/31 | 10.231.99.96 – 10.231.99.97 | 10.231.99.97 |
| 50 | 10.231.99.98/31 | 10.231.99.98 – 10.231.99.99 | 10.231.99.99 |
| 51 | 10.231.99.100/31 | 10.231.99.100 – 10.231.99.101 | 10.231.99.101 |
| 52 | 10.231.99.102/31 | 10.231.99.102 – 10.231.99.103 | 10.231.99.103 |
| 53 | 10.231.99.104/31 | 10.231.99.104 – 10.231.99.105 | 10.231.99.105 |
| 54 | 10.231.99.106/31 | 10.231.99.106 – 10.231.99.107 | 10.231.99.107 |
| 55 | 10.231.99.108/31 | 10.231.99.108 – 10.231.99.109 | 10.231.99.109 |
| 56 | 10.231.99.110/31 | 10.231.99.110 – 10.231.99.111 | 10.231.99.111 |
| 57 | 10.231.99.112/31 | 10.231.99.112 – 10.231.99.113 | 10.231.99.113 |
| 58 | 10.231.99.114/31 | 10.231.99.114 – 10.231.99.115 | 10.231.99.115 |
| 59 | 10.231.99.116/31 | 10.231.99.116 – 10.231.99.117 | 10.231.99.117 |
| 60 | 10.231.99.118/31 | 10.231.99.118 – 10.231.99.119 | 10.231.99.119 |
| 61 | 10.231.99.120/31 | 10.231.99.120 – 10.231.99.121 | 10.231.99.121 |
| 62 | 10.231.99.122/31 | 10.231.99.122 – 10.231.99.123 | 10.231.99.123 |
| 63 | 10.231.99.124/31 | 10.231.99.124 – 10.231.99.125 | 10.231.99.125 |
| 64 | 10.231.99.126/31 | 10.231.99.126 – 10.231.99.127 | 10.231.99.127 |
| 65 | 10.231.99.128/31 | 10.231.99.128 – 10.231.99.129 | 10.231.99.129 |
| 66 | 10.231.99.130/31 | 10.231.99.130 – 10.231.99.131 | 10.231.99.131 |
| 67 | 10.231.99.132/31 | 10.231.99.132 – 10.231.99.133 | 10.231.99.133 |
| 68 | 10.231.99.134/31 | 10.231.99.134 – 10.231.99.135 | 10.231.99.135 |
| 69 | 10.231.99.136/31 | 10.231.99.136 – 10.231.99.137 | 10.231.99.137 |
| 70 | 10.231.99.138/31 | 10.231.99.138 – 10.231.99.139 | 10.231.99.139 |
| 71 | 10.231.99.140/31 | 10.231.99.140 – 10.231.99.141 | 10.231.99.141 |
| 72 | 10.231.99.142/31 | 10.231.99.142 – 10.231.99.143 | 10.231.99.143 |
| 73 | 10.231.99.144/31 | 10.231.99.144 – 10.231.99.145 | 10.231.99.145 |
| 74 | 10.231.99.146/31 | 10.231.99.146 – 10.231.99.147 | 10.231.99.147 |
| 75 | 10.231.99.148/31 | 10.231.99.148 – 10.231.99.149 | 10.231.99.149 |
| 76 | 10.231.99.150/31 | 10.231.99.150 – 10.231.99.151 | 10.231.99.151 |
| 77 | 10.231.99.152/31 | 10.231.99.152 – 10.231.99.153 | 10.231.99.153 |
| 78 | 10.231.99.154/31 | 10.231.99.154 – 10.231.99.155 | 10.231.99.155 |
| 79 | 10.231.99.156/31 | 10.231.99.156 – 10.231.99.157 | 10.231.99.157 |
| 80 | 10.231.99.158/31 | 10.231.99.158 – 10.231.99.159 | 10.231.99.159 |
| 81 | 10.231.99.160/31 | 10.231.99.160 – 10.231.99.161 | 10.231.99.161 |
| 82 | 10.231.99.162/31 | 10.231.99.162 – 10.231.99.163 | 10.231.99.163 |
| 83 | 10.231.99.164/31 | 10.231.99.164 – 10.231.99.165 | 10.231.99.165 |
| 84 | 10.231.99.166/31 | 10.231.99.166 – 10.231.99.167 | 10.231.99.167 |
| 85 | 10.231.99.168/31 | 10.231.99.168 – 10.231.99.169 | 10.231.99.169 |
| 86 | 10.231.99.170/31 | 10.231.99.170 – 10.231.99.171 | 10.231.99.171 |
| 87 | 10.231.99.172/31 | 10.231.99.172 – 10.231.99.173 | 10.231.99.173 |
| 88 | 10.231.99.174/31 | 10.231.99.174 – 10.231.99.175 | 10.231.99.175 |
| 89 | 10.231.99.176/31 | 10.231.99.176 – 10.231.99.177 | 10.231.99.177 |
| 90 | 10.231.99.178/31 | 10.231.99.178 – 10.231.99.179 | 10.231.99.179 |
| 91 | 10.231.99.180/31 | 10.231.99.180 – 10.231.99.181 | 10.231.99.181 |
| 92 | 10.231.99.182/31 | 10.231.99.182 – 10.231.99.183 | 10.231.99.183 |
| 93 | 10.231.99.184/31 | 10.231.99.184 – 10.231.99.185 | 10.231.99.185 |
| 94 | 10.231.99.186/31 | 10.231.99.186 – 10.231.99.187 | 10.231.99.187 |
| 95 | 10.231.99.188/31 | 10.231.99.188 – 10.231.99.189 | 10.231.99.189 |
| 96 | 10.231.99.190/31 | 10.231.99.190 – 10.231.99.191 | 10.231.99.191 |
| 97 | 10.231.99.192/31 | 10.231.99.192 – 10.231.99.193 | 10.231.99.193 |
| 98 | 10.231.99.194/31 | 10.231.99.194 – 10.231.99.195 | 10.231.99.195 |
| 99 | 10.231.99.196/31 | 10.231.99.196 – 10.231.99.197 | 10.231.99.197 |
| 100 | 10.231.99.198/31 | 10.231.99.198 – 10.231.99.199 | 10.231.99.199 |
| 101 | 10.231.99.200/31 | 10.231.99.200 – 10.231.99.201 | 10.231.99.201 |
| 102 | 10.231.99.202/31 | 10.231.99.202 – 10.231.99.203 | 10.231.99.203 |
| 103 | 10.231.99.204/31 | 10.231.99.204 – 10.231.99.205 | 10.231.99.205 |
| 104 | 10.231.99.206/31 | 10.231.99.206 – 10.231.99.207 | 10.231.99.207 |
| 105 | 10.231.99.208/31 | 10.231.99.208 – 10.231.99.209 | 10.231.99.209 |
| 106 | 10.231.99.210/31 | 10.231.99.210 – 10.231.99.211 | 10.231.99.211 |
| 107 | 10.231.99.212/31 | 10.231.99.212 – 10.231.99.213 | 10.231.99.213 |
| 108 | 10.231.99.214/31 | 10.231.99.214 – 10.231.99.215 | 10.231.99.215 |
| 109 | 10.231.99.216/31 | 10.231.99.216 – 10.231.99.217 | 10.231.99.217 |
| 110 | 10.231.99.218/31 | 10.231.99.218 – 10.231.99.219 | 10.231.99.219 |
| 111 | 10.231.99.220/31 | 10.231.99.220 – 10.231.99.221 | 10.231.99.221 |
| 112 | 10.231.99.222/31 | 10.231.99.222 – 10.231.99.223 | 10.231.99.223 |
| 113 | 10.231.99.224/31 | 10.231.99.224 – 10.231.99.225 | 10.231.99.225 |
| 114 | 10.231.99.226/31 | 10.231.99.226 – 10.231.99.227 | 10.231.99.227 |
| 115 | 10.231.99.228/31 | 10.231.99.228 – 10.231.99.229 | 10.231.99.229 |
| 116 | 10.231.99.230/31 | 10.231.99.230 – 10.231.99.231 | 10.231.99.231 |
| 117 | 10.231.99.232/31 | 10.231.99.232 – 10.231.99.233 | 10.231.99.233 |
| 118 | 10.231.99.234/31 | 10.231.99.234 – 10.231.99.235 | 10.231.99.235 |
| 119 | 10.231.99.236/31 | 10.231.99.236 – 10.231.99.237 | 10.231.99.237 |
| 120 | 10.231.99.238/31 | 10.231.99.238 – 10.231.99.239 | 10.231.99.239 |
| 121 | 10.231.99.240/31 | 10.231.99.240 – 10.231.99.241 | 10.231.99.241 |
| 122 | 10.231.99.242/31 | 10.231.99.242 – 10.231.99.243 | 10.231.99.243 |
| 123 | 10.231.99.244/31 | 10.231.99.244 – 10.231.99.245 | 10.231.99.245 |
| 124 | 10.231.99.246/31 | 10.231.99.246 – 10.231.99.247 | 10.231.99.247 |
| 125 | 10.231.99.248/31 | 10.231.99.248 – 10.231.99.249 | 10.231.99.249 |
| 126 | 10.231.99.250/31 | 10.231.99.250 – 10.231.99.251 | 10.231.99.251 |
| 127 | 10.231.99.252/31 | 10.231.99.252 – 10.231.99.253 | 10.231.99.253 |
| 128 | 10.231.99.254/31 | 10.231.99.254 – 10.231.99.255 | 10.231.99.255 |
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 /24 |
|---|---|---|---|---|
| /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 | - |
| /24 | 255.255.255.0 | 256 | 254 | 1 |
| /25 | 255.255.255.128 | 128 | 126 | 2 split → |
| /26 | 255.255.255.192 | 64 | 62 | 4 split → |
| /27 | 255.255.255.224 | 32 | 30 | 8 split → |
| /28 | 255.255.255.240 | 16 | 14 | 16 split → |
| /29 | 255.255.255.248 | 8 | 6 | 32 split → |
| /30 | 255.255.255.252 | 4 | 2 | 64 split → |
| /31 | 255.255.255.254 | 2 | 2 | 128 split → |
| /32 | 255.255.255.255 | 1 | 1 | 256 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.