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)10.158.99.0/24
network10.158.99.0/24
broadcast10.158.99.255
first host10.158.99.1
last host10.158.99.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.158.99.0/24
address00001010.10011110.01100011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10011110.01100011.00000000
broadcast00001010.10011110.01100011.11111111
green = network part, grey = host part
hex0x0a9e6300
decimal178152192
reverse dns0.99.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:6300
/24 split into /30 · 64 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.158.99.0/30 | 10.158.99.1 – 10.158.99.2 | 10.158.99.3 |
| 2 | 10.158.99.4/30 | 10.158.99.5 – 10.158.99.6 | 10.158.99.7 |
| 3 | 10.158.99.8/30 | 10.158.99.9 – 10.158.99.10 | 10.158.99.11 |
| 4 | 10.158.99.12/30 | 10.158.99.13 – 10.158.99.14 | 10.158.99.15 |
| 5 | 10.158.99.16/30 | 10.158.99.17 – 10.158.99.18 | 10.158.99.19 |
| 6 | 10.158.99.20/30 | 10.158.99.21 – 10.158.99.22 | 10.158.99.23 |
| 7 | 10.158.99.24/30 | 10.158.99.25 – 10.158.99.26 | 10.158.99.27 |
| 8 | 10.158.99.28/30 | 10.158.99.29 – 10.158.99.30 | 10.158.99.31 |
| 9 | 10.158.99.32/30 | 10.158.99.33 – 10.158.99.34 | 10.158.99.35 |
| 10 | 10.158.99.36/30 | 10.158.99.37 – 10.158.99.38 | 10.158.99.39 |
| 11 | 10.158.99.40/30 | 10.158.99.41 – 10.158.99.42 | 10.158.99.43 |
| 12 | 10.158.99.44/30 | 10.158.99.45 – 10.158.99.46 | 10.158.99.47 |
| 13 | 10.158.99.48/30 | 10.158.99.49 – 10.158.99.50 | 10.158.99.51 |
| 14 | 10.158.99.52/30 | 10.158.99.53 – 10.158.99.54 | 10.158.99.55 |
| 15 | 10.158.99.56/30 | 10.158.99.57 – 10.158.99.58 | 10.158.99.59 |
| 16 | 10.158.99.60/30 | 10.158.99.61 – 10.158.99.62 | 10.158.99.63 |
| 17 | 10.158.99.64/30 | 10.158.99.65 – 10.158.99.66 | 10.158.99.67 |
| 18 | 10.158.99.68/30 | 10.158.99.69 – 10.158.99.70 | 10.158.99.71 |
| 19 | 10.158.99.72/30 | 10.158.99.73 – 10.158.99.74 | 10.158.99.75 |
| 20 | 10.158.99.76/30 | 10.158.99.77 – 10.158.99.78 | 10.158.99.79 |
| 21 | 10.158.99.80/30 | 10.158.99.81 – 10.158.99.82 | 10.158.99.83 |
| 22 | 10.158.99.84/30 | 10.158.99.85 – 10.158.99.86 | 10.158.99.87 |
| 23 | 10.158.99.88/30 | 10.158.99.89 – 10.158.99.90 | 10.158.99.91 |
| 24 | 10.158.99.92/30 | 10.158.99.93 – 10.158.99.94 | 10.158.99.95 |
| 25 | 10.158.99.96/30 | 10.158.99.97 – 10.158.99.98 | 10.158.99.99 |
| 26 | 10.158.99.100/30 | 10.158.99.101 – 10.158.99.102 | 10.158.99.103 |
| 27 | 10.158.99.104/30 | 10.158.99.105 – 10.158.99.106 | 10.158.99.107 |
| 28 | 10.158.99.108/30 | 10.158.99.109 – 10.158.99.110 | 10.158.99.111 |
| 29 | 10.158.99.112/30 | 10.158.99.113 – 10.158.99.114 | 10.158.99.115 |
| 30 | 10.158.99.116/30 | 10.158.99.117 – 10.158.99.118 | 10.158.99.119 |
| 31 | 10.158.99.120/30 | 10.158.99.121 – 10.158.99.122 | 10.158.99.123 |
| 32 | 10.158.99.124/30 | 10.158.99.125 – 10.158.99.126 | 10.158.99.127 |
| 33 | 10.158.99.128/30 | 10.158.99.129 – 10.158.99.130 | 10.158.99.131 |
| 34 | 10.158.99.132/30 | 10.158.99.133 – 10.158.99.134 | 10.158.99.135 |
| 35 | 10.158.99.136/30 | 10.158.99.137 – 10.158.99.138 | 10.158.99.139 |
| 36 | 10.158.99.140/30 | 10.158.99.141 – 10.158.99.142 | 10.158.99.143 |
| 37 | 10.158.99.144/30 | 10.158.99.145 – 10.158.99.146 | 10.158.99.147 |
| 38 | 10.158.99.148/30 | 10.158.99.149 – 10.158.99.150 | 10.158.99.151 |
| 39 | 10.158.99.152/30 | 10.158.99.153 – 10.158.99.154 | 10.158.99.155 |
| 40 | 10.158.99.156/30 | 10.158.99.157 – 10.158.99.158 | 10.158.99.159 |
| 41 | 10.158.99.160/30 | 10.158.99.161 – 10.158.99.162 | 10.158.99.163 |
| 42 | 10.158.99.164/30 | 10.158.99.165 – 10.158.99.166 | 10.158.99.167 |
| 43 | 10.158.99.168/30 | 10.158.99.169 – 10.158.99.170 | 10.158.99.171 |
| 44 | 10.158.99.172/30 | 10.158.99.173 – 10.158.99.174 | 10.158.99.175 |
| 45 | 10.158.99.176/30 | 10.158.99.177 – 10.158.99.178 | 10.158.99.179 |
| 46 | 10.158.99.180/30 | 10.158.99.181 – 10.158.99.182 | 10.158.99.183 |
| 47 | 10.158.99.184/30 | 10.158.99.185 – 10.158.99.186 | 10.158.99.187 |
| 48 | 10.158.99.188/30 | 10.158.99.189 – 10.158.99.190 | 10.158.99.191 |
| 49 | 10.158.99.192/30 | 10.158.99.193 – 10.158.99.194 | 10.158.99.195 |
| 50 | 10.158.99.196/30 | 10.158.99.197 – 10.158.99.198 | 10.158.99.199 |
| 51 | 10.158.99.200/30 | 10.158.99.201 – 10.158.99.202 | 10.158.99.203 |
| 52 | 10.158.99.204/30 | 10.158.99.205 – 10.158.99.206 | 10.158.99.207 |
| 53 | 10.158.99.208/30 | 10.158.99.209 – 10.158.99.210 | 10.158.99.211 |
| 54 | 10.158.99.212/30 | 10.158.99.213 – 10.158.99.214 | 10.158.99.215 |
| 55 | 10.158.99.216/30 | 10.158.99.217 – 10.158.99.218 | 10.158.99.219 |
| 56 | 10.158.99.220/30 | 10.158.99.221 – 10.158.99.222 | 10.158.99.223 |
| 57 | 10.158.99.224/30 | 10.158.99.225 – 10.158.99.226 | 10.158.99.227 |
| 58 | 10.158.99.228/30 | 10.158.99.229 – 10.158.99.230 | 10.158.99.231 |
| 59 | 10.158.99.232/30 | 10.158.99.233 – 10.158.99.234 | 10.158.99.235 |
| 60 | 10.158.99.236/30 | 10.158.99.237 – 10.158.99.238 | 10.158.99.239 |
| 61 | 10.158.99.240/30 | 10.158.99.241 – 10.158.99.242 | 10.158.99.243 |
| 62 | 10.158.99.244/30 | 10.158.99.245 – 10.158.99.246 | 10.158.99.247 |
| 63 | 10.158.99.248/30 | 10.158.99.249 – 10.158.99.250 | 10.158.99.251 |
| 64 | 10.158.99.252/30 | 10.158.99.253 – 10.158.99.254 | 10.158.99.255 |
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.