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)10.3.68.0/24
network10.3.68.0/24
broadcast10.3.68.255
first host10.3.68.1
last host10.3.68.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.3.68.0/24
address00001010.00000011.01000100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000011.01000100.00000000
broadcast00001010.00000011.01000100.11111111
green = network part, grey = host part
hex0x0a034400
decimal167986176
reverse dns0.68.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:4400
/24 split into /31 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.3.68.0/31 | 10.3.68.0 – 10.3.68.1 | 10.3.68.1 |
| 2 | 10.3.68.2/31 | 10.3.68.2 – 10.3.68.3 | 10.3.68.3 |
| 3 | 10.3.68.4/31 | 10.3.68.4 – 10.3.68.5 | 10.3.68.5 |
| 4 | 10.3.68.6/31 | 10.3.68.6 – 10.3.68.7 | 10.3.68.7 |
| 5 | 10.3.68.8/31 | 10.3.68.8 – 10.3.68.9 | 10.3.68.9 |
| 6 | 10.3.68.10/31 | 10.3.68.10 – 10.3.68.11 | 10.3.68.11 |
| 7 | 10.3.68.12/31 | 10.3.68.12 – 10.3.68.13 | 10.3.68.13 |
| 8 | 10.3.68.14/31 | 10.3.68.14 – 10.3.68.15 | 10.3.68.15 |
| 9 | 10.3.68.16/31 | 10.3.68.16 – 10.3.68.17 | 10.3.68.17 |
| 10 | 10.3.68.18/31 | 10.3.68.18 – 10.3.68.19 | 10.3.68.19 |
| 11 | 10.3.68.20/31 | 10.3.68.20 – 10.3.68.21 | 10.3.68.21 |
| 12 | 10.3.68.22/31 | 10.3.68.22 – 10.3.68.23 | 10.3.68.23 |
| 13 | 10.3.68.24/31 | 10.3.68.24 – 10.3.68.25 | 10.3.68.25 |
| 14 | 10.3.68.26/31 | 10.3.68.26 – 10.3.68.27 | 10.3.68.27 |
| 15 | 10.3.68.28/31 | 10.3.68.28 – 10.3.68.29 | 10.3.68.29 |
| 16 | 10.3.68.30/31 | 10.3.68.30 – 10.3.68.31 | 10.3.68.31 |
| 17 | 10.3.68.32/31 | 10.3.68.32 – 10.3.68.33 | 10.3.68.33 |
| 18 | 10.3.68.34/31 | 10.3.68.34 – 10.3.68.35 | 10.3.68.35 |
| 19 | 10.3.68.36/31 | 10.3.68.36 – 10.3.68.37 | 10.3.68.37 |
| 20 | 10.3.68.38/31 | 10.3.68.38 – 10.3.68.39 | 10.3.68.39 |
| 21 | 10.3.68.40/31 | 10.3.68.40 – 10.3.68.41 | 10.3.68.41 |
| 22 | 10.3.68.42/31 | 10.3.68.42 – 10.3.68.43 | 10.3.68.43 |
| 23 | 10.3.68.44/31 | 10.3.68.44 – 10.3.68.45 | 10.3.68.45 |
| 24 | 10.3.68.46/31 | 10.3.68.46 – 10.3.68.47 | 10.3.68.47 |
| 25 | 10.3.68.48/31 | 10.3.68.48 – 10.3.68.49 | 10.3.68.49 |
| 26 | 10.3.68.50/31 | 10.3.68.50 – 10.3.68.51 | 10.3.68.51 |
| 27 | 10.3.68.52/31 | 10.3.68.52 – 10.3.68.53 | 10.3.68.53 |
| 28 | 10.3.68.54/31 | 10.3.68.54 – 10.3.68.55 | 10.3.68.55 |
| 29 | 10.3.68.56/31 | 10.3.68.56 – 10.3.68.57 | 10.3.68.57 |
| 30 | 10.3.68.58/31 | 10.3.68.58 – 10.3.68.59 | 10.3.68.59 |
| 31 | 10.3.68.60/31 | 10.3.68.60 – 10.3.68.61 | 10.3.68.61 |
| 32 | 10.3.68.62/31 | 10.3.68.62 – 10.3.68.63 | 10.3.68.63 |
| 33 | 10.3.68.64/31 | 10.3.68.64 – 10.3.68.65 | 10.3.68.65 |
| 34 | 10.3.68.66/31 | 10.3.68.66 – 10.3.68.67 | 10.3.68.67 |
| 35 | 10.3.68.68/31 | 10.3.68.68 – 10.3.68.69 | 10.3.68.69 |
| 36 | 10.3.68.70/31 | 10.3.68.70 – 10.3.68.71 | 10.3.68.71 |
| 37 | 10.3.68.72/31 | 10.3.68.72 – 10.3.68.73 | 10.3.68.73 |
| 38 | 10.3.68.74/31 | 10.3.68.74 – 10.3.68.75 | 10.3.68.75 |
| 39 | 10.3.68.76/31 | 10.3.68.76 – 10.3.68.77 | 10.3.68.77 |
| 40 | 10.3.68.78/31 | 10.3.68.78 – 10.3.68.79 | 10.3.68.79 |
| 41 | 10.3.68.80/31 | 10.3.68.80 – 10.3.68.81 | 10.3.68.81 |
| 42 | 10.3.68.82/31 | 10.3.68.82 – 10.3.68.83 | 10.3.68.83 |
| 43 | 10.3.68.84/31 | 10.3.68.84 – 10.3.68.85 | 10.3.68.85 |
| 44 | 10.3.68.86/31 | 10.3.68.86 – 10.3.68.87 | 10.3.68.87 |
| 45 | 10.3.68.88/31 | 10.3.68.88 – 10.3.68.89 | 10.3.68.89 |
| 46 | 10.3.68.90/31 | 10.3.68.90 – 10.3.68.91 | 10.3.68.91 |
| 47 | 10.3.68.92/31 | 10.3.68.92 – 10.3.68.93 | 10.3.68.93 |
| 48 | 10.3.68.94/31 | 10.3.68.94 – 10.3.68.95 | 10.3.68.95 |
| 49 | 10.3.68.96/31 | 10.3.68.96 – 10.3.68.97 | 10.3.68.97 |
| 50 | 10.3.68.98/31 | 10.3.68.98 – 10.3.68.99 | 10.3.68.99 |
| 51 | 10.3.68.100/31 | 10.3.68.100 – 10.3.68.101 | 10.3.68.101 |
| 52 | 10.3.68.102/31 | 10.3.68.102 – 10.3.68.103 | 10.3.68.103 |
| 53 | 10.3.68.104/31 | 10.3.68.104 – 10.3.68.105 | 10.3.68.105 |
| 54 | 10.3.68.106/31 | 10.3.68.106 – 10.3.68.107 | 10.3.68.107 |
| 55 | 10.3.68.108/31 | 10.3.68.108 – 10.3.68.109 | 10.3.68.109 |
| 56 | 10.3.68.110/31 | 10.3.68.110 – 10.3.68.111 | 10.3.68.111 |
| 57 | 10.3.68.112/31 | 10.3.68.112 – 10.3.68.113 | 10.3.68.113 |
| 58 | 10.3.68.114/31 | 10.3.68.114 – 10.3.68.115 | 10.3.68.115 |
| 59 | 10.3.68.116/31 | 10.3.68.116 – 10.3.68.117 | 10.3.68.117 |
| 60 | 10.3.68.118/31 | 10.3.68.118 – 10.3.68.119 | 10.3.68.119 |
| 61 | 10.3.68.120/31 | 10.3.68.120 – 10.3.68.121 | 10.3.68.121 |
| 62 | 10.3.68.122/31 | 10.3.68.122 – 10.3.68.123 | 10.3.68.123 |
| 63 | 10.3.68.124/31 | 10.3.68.124 – 10.3.68.125 | 10.3.68.125 |
| 64 | 10.3.68.126/31 | 10.3.68.126 – 10.3.68.127 | 10.3.68.127 |
| 65 | 10.3.68.128/31 | 10.3.68.128 – 10.3.68.129 | 10.3.68.129 |
| 66 | 10.3.68.130/31 | 10.3.68.130 – 10.3.68.131 | 10.3.68.131 |
| 67 | 10.3.68.132/31 | 10.3.68.132 – 10.3.68.133 | 10.3.68.133 |
| 68 | 10.3.68.134/31 | 10.3.68.134 – 10.3.68.135 | 10.3.68.135 |
| 69 | 10.3.68.136/31 | 10.3.68.136 – 10.3.68.137 | 10.3.68.137 |
| 70 | 10.3.68.138/31 | 10.3.68.138 – 10.3.68.139 | 10.3.68.139 |
| 71 | 10.3.68.140/31 | 10.3.68.140 – 10.3.68.141 | 10.3.68.141 |
| 72 | 10.3.68.142/31 | 10.3.68.142 – 10.3.68.143 | 10.3.68.143 |
| 73 | 10.3.68.144/31 | 10.3.68.144 – 10.3.68.145 | 10.3.68.145 |
| 74 | 10.3.68.146/31 | 10.3.68.146 – 10.3.68.147 | 10.3.68.147 |
| 75 | 10.3.68.148/31 | 10.3.68.148 – 10.3.68.149 | 10.3.68.149 |
| 76 | 10.3.68.150/31 | 10.3.68.150 – 10.3.68.151 | 10.3.68.151 |
| 77 | 10.3.68.152/31 | 10.3.68.152 – 10.3.68.153 | 10.3.68.153 |
| 78 | 10.3.68.154/31 | 10.3.68.154 – 10.3.68.155 | 10.3.68.155 |
| 79 | 10.3.68.156/31 | 10.3.68.156 – 10.3.68.157 | 10.3.68.157 |
| 80 | 10.3.68.158/31 | 10.3.68.158 – 10.3.68.159 | 10.3.68.159 |
| 81 | 10.3.68.160/31 | 10.3.68.160 – 10.3.68.161 | 10.3.68.161 |
| 82 | 10.3.68.162/31 | 10.3.68.162 – 10.3.68.163 | 10.3.68.163 |
| 83 | 10.3.68.164/31 | 10.3.68.164 – 10.3.68.165 | 10.3.68.165 |
| 84 | 10.3.68.166/31 | 10.3.68.166 – 10.3.68.167 | 10.3.68.167 |
| 85 | 10.3.68.168/31 | 10.3.68.168 – 10.3.68.169 | 10.3.68.169 |
| 86 | 10.3.68.170/31 | 10.3.68.170 – 10.3.68.171 | 10.3.68.171 |
| 87 | 10.3.68.172/31 | 10.3.68.172 – 10.3.68.173 | 10.3.68.173 |
| 88 | 10.3.68.174/31 | 10.3.68.174 – 10.3.68.175 | 10.3.68.175 |
| 89 | 10.3.68.176/31 | 10.3.68.176 – 10.3.68.177 | 10.3.68.177 |
| 90 | 10.3.68.178/31 | 10.3.68.178 – 10.3.68.179 | 10.3.68.179 |
| 91 | 10.3.68.180/31 | 10.3.68.180 – 10.3.68.181 | 10.3.68.181 |
| 92 | 10.3.68.182/31 | 10.3.68.182 – 10.3.68.183 | 10.3.68.183 |
| 93 | 10.3.68.184/31 | 10.3.68.184 – 10.3.68.185 | 10.3.68.185 |
| 94 | 10.3.68.186/31 | 10.3.68.186 – 10.3.68.187 | 10.3.68.187 |
| 95 | 10.3.68.188/31 | 10.3.68.188 – 10.3.68.189 | 10.3.68.189 |
| 96 | 10.3.68.190/31 | 10.3.68.190 – 10.3.68.191 | 10.3.68.191 |
| 97 | 10.3.68.192/31 | 10.3.68.192 – 10.3.68.193 | 10.3.68.193 |
| 98 | 10.3.68.194/31 | 10.3.68.194 – 10.3.68.195 | 10.3.68.195 |
| 99 | 10.3.68.196/31 | 10.3.68.196 – 10.3.68.197 | 10.3.68.197 |
| 100 | 10.3.68.198/31 | 10.3.68.198 – 10.3.68.199 | 10.3.68.199 |
| 101 | 10.3.68.200/31 | 10.3.68.200 – 10.3.68.201 | 10.3.68.201 |
| 102 | 10.3.68.202/31 | 10.3.68.202 – 10.3.68.203 | 10.3.68.203 |
| 103 | 10.3.68.204/31 | 10.3.68.204 – 10.3.68.205 | 10.3.68.205 |
| 104 | 10.3.68.206/31 | 10.3.68.206 – 10.3.68.207 | 10.3.68.207 |
| 105 | 10.3.68.208/31 | 10.3.68.208 – 10.3.68.209 | 10.3.68.209 |
| 106 | 10.3.68.210/31 | 10.3.68.210 – 10.3.68.211 | 10.3.68.211 |
| 107 | 10.3.68.212/31 | 10.3.68.212 – 10.3.68.213 | 10.3.68.213 |
| 108 | 10.3.68.214/31 | 10.3.68.214 – 10.3.68.215 | 10.3.68.215 |
| 109 | 10.3.68.216/31 | 10.3.68.216 – 10.3.68.217 | 10.3.68.217 |
| 110 | 10.3.68.218/31 | 10.3.68.218 – 10.3.68.219 | 10.3.68.219 |
| 111 | 10.3.68.220/31 | 10.3.68.220 – 10.3.68.221 | 10.3.68.221 |
| 112 | 10.3.68.222/31 | 10.3.68.222 – 10.3.68.223 | 10.3.68.223 |
| 113 | 10.3.68.224/31 | 10.3.68.224 – 10.3.68.225 | 10.3.68.225 |
| 114 | 10.3.68.226/31 | 10.3.68.226 – 10.3.68.227 | 10.3.68.227 |
| 115 | 10.3.68.228/31 | 10.3.68.228 – 10.3.68.229 | 10.3.68.229 |
| 116 | 10.3.68.230/31 | 10.3.68.230 – 10.3.68.231 | 10.3.68.231 |
| 117 | 10.3.68.232/31 | 10.3.68.232 – 10.3.68.233 | 10.3.68.233 |
| 118 | 10.3.68.234/31 | 10.3.68.234 – 10.3.68.235 | 10.3.68.235 |
| 119 | 10.3.68.236/31 | 10.3.68.236 – 10.3.68.237 | 10.3.68.237 |
| 120 | 10.3.68.238/31 | 10.3.68.238 – 10.3.68.239 | 10.3.68.239 |
| 121 | 10.3.68.240/31 | 10.3.68.240 – 10.3.68.241 | 10.3.68.241 |
| 122 | 10.3.68.242/31 | 10.3.68.242 – 10.3.68.243 | 10.3.68.243 |
| 123 | 10.3.68.244/31 | 10.3.68.244 – 10.3.68.245 | 10.3.68.245 |
| 124 | 10.3.68.246/31 | 10.3.68.246 – 10.3.68.247 | 10.3.68.247 |
| 125 | 10.3.68.248/31 | 10.3.68.248 – 10.3.68.249 | 10.3.68.249 |
| 126 | 10.3.68.250/31 | 10.3.68.250 – 10.3.68.251 | 10.3.68.251 |
| 127 | 10.3.68.252/31 | 10.3.68.252 – 10.3.68.253 | 10.3.68.253 |
| 128 | 10.3.68.254/31 | 10.3.68.254 – 10.3.68.255 | 10.3.68.255 |
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.