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)10.75.4.0/23
network10.75.4.0/23
broadcast10.75.5.255
first host10.75.4.1
last host10.75.5.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.75.4.0/23
address00001010.01001011.00000100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001011.00000100.00000000
broadcast00001010.01001011.00000101.11111111
green = network part, grey = host part
hex0x0a4b0400
decimal172688384
reverse dns0.4.75.10.in-addr.arpa
ipv4-mapped::ffff:a4b:400
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.75.4.0/30 | 10.75.4.1 – 10.75.4.2 | 10.75.4.3 |
| 2 | 10.75.4.4/30 | 10.75.4.5 – 10.75.4.6 | 10.75.4.7 |
| 3 | 10.75.4.8/30 | 10.75.4.9 – 10.75.4.10 | 10.75.4.11 |
| 4 | 10.75.4.12/30 | 10.75.4.13 – 10.75.4.14 | 10.75.4.15 |
| 5 | 10.75.4.16/30 | 10.75.4.17 – 10.75.4.18 | 10.75.4.19 |
| 6 | 10.75.4.20/30 | 10.75.4.21 – 10.75.4.22 | 10.75.4.23 |
| 7 | 10.75.4.24/30 | 10.75.4.25 – 10.75.4.26 | 10.75.4.27 |
| 8 | 10.75.4.28/30 | 10.75.4.29 – 10.75.4.30 | 10.75.4.31 |
| 9 | 10.75.4.32/30 | 10.75.4.33 – 10.75.4.34 | 10.75.4.35 |
| 10 | 10.75.4.36/30 | 10.75.4.37 – 10.75.4.38 | 10.75.4.39 |
| 11 | 10.75.4.40/30 | 10.75.4.41 – 10.75.4.42 | 10.75.4.43 |
| 12 | 10.75.4.44/30 | 10.75.4.45 – 10.75.4.46 | 10.75.4.47 |
| 13 | 10.75.4.48/30 | 10.75.4.49 – 10.75.4.50 | 10.75.4.51 |
| 14 | 10.75.4.52/30 | 10.75.4.53 – 10.75.4.54 | 10.75.4.55 |
| 15 | 10.75.4.56/30 | 10.75.4.57 – 10.75.4.58 | 10.75.4.59 |
| 16 | 10.75.4.60/30 | 10.75.4.61 – 10.75.4.62 | 10.75.4.63 |
| 17 | 10.75.4.64/30 | 10.75.4.65 – 10.75.4.66 | 10.75.4.67 |
| 18 | 10.75.4.68/30 | 10.75.4.69 – 10.75.4.70 | 10.75.4.71 |
| 19 | 10.75.4.72/30 | 10.75.4.73 – 10.75.4.74 | 10.75.4.75 |
| 20 | 10.75.4.76/30 | 10.75.4.77 – 10.75.4.78 | 10.75.4.79 |
| 21 | 10.75.4.80/30 | 10.75.4.81 – 10.75.4.82 | 10.75.4.83 |
| 22 | 10.75.4.84/30 | 10.75.4.85 – 10.75.4.86 | 10.75.4.87 |
| 23 | 10.75.4.88/30 | 10.75.4.89 – 10.75.4.90 | 10.75.4.91 |
| 24 | 10.75.4.92/30 | 10.75.4.93 – 10.75.4.94 | 10.75.4.95 |
| 25 | 10.75.4.96/30 | 10.75.4.97 – 10.75.4.98 | 10.75.4.99 |
| 26 | 10.75.4.100/30 | 10.75.4.101 – 10.75.4.102 | 10.75.4.103 |
| 27 | 10.75.4.104/30 | 10.75.4.105 – 10.75.4.106 | 10.75.4.107 |
| 28 | 10.75.4.108/30 | 10.75.4.109 – 10.75.4.110 | 10.75.4.111 |
| 29 | 10.75.4.112/30 | 10.75.4.113 – 10.75.4.114 | 10.75.4.115 |
| 30 | 10.75.4.116/30 | 10.75.4.117 – 10.75.4.118 | 10.75.4.119 |
| 31 | 10.75.4.120/30 | 10.75.4.121 – 10.75.4.122 | 10.75.4.123 |
| 32 | 10.75.4.124/30 | 10.75.4.125 – 10.75.4.126 | 10.75.4.127 |
| 33 | 10.75.4.128/30 | 10.75.4.129 – 10.75.4.130 | 10.75.4.131 |
| 34 | 10.75.4.132/30 | 10.75.4.133 – 10.75.4.134 | 10.75.4.135 |
| 35 | 10.75.4.136/30 | 10.75.4.137 – 10.75.4.138 | 10.75.4.139 |
| 36 | 10.75.4.140/30 | 10.75.4.141 – 10.75.4.142 | 10.75.4.143 |
| 37 | 10.75.4.144/30 | 10.75.4.145 – 10.75.4.146 | 10.75.4.147 |
| 38 | 10.75.4.148/30 | 10.75.4.149 – 10.75.4.150 | 10.75.4.151 |
| 39 | 10.75.4.152/30 | 10.75.4.153 – 10.75.4.154 | 10.75.4.155 |
| 40 | 10.75.4.156/30 | 10.75.4.157 – 10.75.4.158 | 10.75.4.159 |
| 41 | 10.75.4.160/30 | 10.75.4.161 – 10.75.4.162 | 10.75.4.163 |
| 42 | 10.75.4.164/30 | 10.75.4.165 – 10.75.4.166 | 10.75.4.167 |
| 43 | 10.75.4.168/30 | 10.75.4.169 – 10.75.4.170 | 10.75.4.171 |
| 44 | 10.75.4.172/30 | 10.75.4.173 – 10.75.4.174 | 10.75.4.175 |
| 45 | 10.75.4.176/30 | 10.75.4.177 – 10.75.4.178 | 10.75.4.179 |
| 46 | 10.75.4.180/30 | 10.75.4.181 – 10.75.4.182 | 10.75.4.183 |
| 47 | 10.75.4.184/30 | 10.75.4.185 – 10.75.4.186 | 10.75.4.187 |
| 48 | 10.75.4.188/30 | 10.75.4.189 – 10.75.4.190 | 10.75.4.191 |
| 49 | 10.75.4.192/30 | 10.75.4.193 – 10.75.4.194 | 10.75.4.195 |
| 50 | 10.75.4.196/30 | 10.75.4.197 – 10.75.4.198 | 10.75.4.199 |
| 51 | 10.75.4.200/30 | 10.75.4.201 – 10.75.4.202 | 10.75.4.203 |
| 52 | 10.75.4.204/30 | 10.75.4.205 – 10.75.4.206 | 10.75.4.207 |
| 53 | 10.75.4.208/30 | 10.75.4.209 – 10.75.4.210 | 10.75.4.211 |
| 54 | 10.75.4.212/30 | 10.75.4.213 – 10.75.4.214 | 10.75.4.215 |
| 55 | 10.75.4.216/30 | 10.75.4.217 – 10.75.4.218 | 10.75.4.219 |
| 56 | 10.75.4.220/30 | 10.75.4.221 – 10.75.4.222 | 10.75.4.223 |
| 57 | 10.75.4.224/30 | 10.75.4.225 – 10.75.4.226 | 10.75.4.227 |
| 58 | 10.75.4.228/30 | 10.75.4.229 – 10.75.4.230 | 10.75.4.231 |
| 59 | 10.75.4.232/30 | 10.75.4.233 – 10.75.4.234 | 10.75.4.235 |
| 60 | 10.75.4.236/30 | 10.75.4.237 – 10.75.4.238 | 10.75.4.239 |
| 61 | 10.75.4.240/30 | 10.75.4.241 – 10.75.4.242 | 10.75.4.243 |
| 62 | 10.75.4.244/30 | 10.75.4.245 – 10.75.4.246 | 10.75.4.247 |
| 63 | 10.75.4.248/30 | 10.75.4.249 – 10.75.4.250 | 10.75.4.251 |
| 64 | 10.75.4.252/30 | 10.75.4.253 – 10.75.4.254 | 10.75.4.255 |
| 65 | 10.75.5.0/30 | 10.75.5.1 – 10.75.5.2 | 10.75.5.3 |
| 66 | 10.75.5.4/30 | 10.75.5.5 – 10.75.5.6 | 10.75.5.7 |
| 67 | 10.75.5.8/30 | 10.75.5.9 – 10.75.5.10 | 10.75.5.11 |
| 68 | 10.75.5.12/30 | 10.75.5.13 – 10.75.5.14 | 10.75.5.15 |
| 69 | 10.75.5.16/30 | 10.75.5.17 – 10.75.5.18 | 10.75.5.19 |
| 70 | 10.75.5.20/30 | 10.75.5.21 – 10.75.5.22 | 10.75.5.23 |
| 71 | 10.75.5.24/30 | 10.75.5.25 – 10.75.5.26 | 10.75.5.27 |
| 72 | 10.75.5.28/30 | 10.75.5.29 – 10.75.5.30 | 10.75.5.31 |
| 73 | 10.75.5.32/30 | 10.75.5.33 – 10.75.5.34 | 10.75.5.35 |
| 74 | 10.75.5.36/30 | 10.75.5.37 – 10.75.5.38 | 10.75.5.39 |
| 75 | 10.75.5.40/30 | 10.75.5.41 – 10.75.5.42 | 10.75.5.43 |
| 76 | 10.75.5.44/30 | 10.75.5.45 – 10.75.5.46 | 10.75.5.47 |
| 77 | 10.75.5.48/30 | 10.75.5.49 – 10.75.5.50 | 10.75.5.51 |
| 78 | 10.75.5.52/30 | 10.75.5.53 – 10.75.5.54 | 10.75.5.55 |
| 79 | 10.75.5.56/30 | 10.75.5.57 – 10.75.5.58 | 10.75.5.59 |
| 80 | 10.75.5.60/30 | 10.75.5.61 – 10.75.5.62 | 10.75.5.63 |
| 81 | 10.75.5.64/30 | 10.75.5.65 – 10.75.5.66 | 10.75.5.67 |
| 82 | 10.75.5.68/30 | 10.75.5.69 – 10.75.5.70 | 10.75.5.71 |
| 83 | 10.75.5.72/30 | 10.75.5.73 – 10.75.5.74 | 10.75.5.75 |
| 84 | 10.75.5.76/30 | 10.75.5.77 – 10.75.5.78 | 10.75.5.79 |
| 85 | 10.75.5.80/30 | 10.75.5.81 – 10.75.5.82 | 10.75.5.83 |
| 86 | 10.75.5.84/30 | 10.75.5.85 – 10.75.5.86 | 10.75.5.87 |
| 87 | 10.75.5.88/30 | 10.75.5.89 – 10.75.5.90 | 10.75.5.91 |
| 88 | 10.75.5.92/30 | 10.75.5.93 – 10.75.5.94 | 10.75.5.95 |
| 89 | 10.75.5.96/30 | 10.75.5.97 – 10.75.5.98 | 10.75.5.99 |
| 90 | 10.75.5.100/30 | 10.75.5.101 – 10.75.5.102 | 10.75.5.103 |
| 91 | 10.75.5.104/30 | 10.75.5.105 – 10.75.5.106 | 10.75.5.107 |
| 92 | 10.75.5.108/30 | 10.75.5.109 – 10.75.5.110 | 10.75.5.111 |
| 93 | 10.75.5.112/30 | 10.75.5.113 – 10.75.5.114 | 10.75.5.115 |
| 94 | 10.75.5.116/30 | 10.75.5.117 – 10.75.5.118 | 10.75.5.119 |
| 95 | 10.75.5.120/30 | 10.75.5.121 – 10.75.5.122 | 10.75.5.123 |
| 96 | 10.75.5.124/30 | 10.75.5.125 – 10.75.5.126 | 10.75.5.127 |
| 97 | 10.75.5.128/30 | 10.75.5.129 – 10.75.5.130 | 10.75.5.131 |
| 98 | 10.75.5.132/30 | 10.75.5.133 – 10.75.5.134 | 10.75.5.135 |
| 99 | 10.75.5.136/30 | 10.75.5.137 – 10.75.5.138 | 10.75.5.139 |
| 100 | 10.75.5.140/30 | 10.75.5.141 – 10.75.5.142 | 10.75.5.143 |
| 101 | 10.75.5.144/30 | 10.75.5.145 – 10.75.5.146 | 10.75.5.147 |
| 102 | 10.75.5.148/30 | 10.75.5.149 – 10.75.5.150 | 10.75.5.151 |
| 103 | 10.75.5.152/30 | 10.75.5.153 – 10.75.5.154 | 10.75.5.155 |
| 104 | 10.75.5.156/30 | 10.75.5.157 – 10.75.5.158 | 10.75.5.159 |
| 105 | 10.75.5.160/30 | 10.75.5.161 – 10.75.5.162 | 10.75.5.163 |
| 106 | 10.75.5.164/30 | 10.75.5.165 – 10.75.5.166 | 10.75.5.167 |
| 107 | 10.75.5.168/30 | 10.75.5.169 – 10.75.5.170 | 10.75.5.171 |
| 108 | 10.75.5.172/30 | 10.75.5.173 – 10.75.5.174 | 10.75.5.175 |
| 109 | 10.75.5.176/30 | 10.75.5.177 – 10.75.5.178 | 10.75.5.179 |
| 110 | 10.75.5.180/30 | 10.75.5.181 – 10.75.5.182 | 10.75.5.183 |
| 111 | 10.75.5.184/30 | 10.75.5.185 – 10.75.5.186 | 10.75.5.187 |
| 112 | 10.75.5.188/30 | 10.75.5.189 – 10.75.5.190 | 10.75.5.191 |
| 113 | 10.75.5.192/30 | 10.75.5.193 – 10.75.5.194 | 10.75.5.195 |
| 114 | 10.75.5.196/30 | 10.75.5.197 – 10.75.5.198 | 10.75.5.199 |
| 115 | 10.75.5.200/30 | 10.75.5.201 – 10.75.5.202 | 10.75.5.203 |
| 116 | 10.75.5.204/30 | 10.75.5.205 – 10.75.5.206 | 10.75.5.207 |
| 117 | 10.75.5.208/30 | 10.75.5.209 – 10.75.5.210 | 10.75.5.211 |
| 118 | 10.75.5.212/30 | 10.75.5.213 – 10.75.5.214 | 10.75.5.215 |
| 119 | 10.75.5.216/30 | 10.75.5.217 – 10.75.5.218 | 10.75.5.219 |
| 120 | 10.75.5.220/30 | 10.75.5.221 – 10.75.5.222 | 10.75.5.223 |
| 121 | 10.75.5.224/30 | 10.75.5.225 – 10.75.5.226 | 10.75.5.227 |
| 122 | 10.75.5.228/30 | 10.75.5.229 – 10.75.5.230 | 10.75.5.231 |
| 123 | 10.75.5.232/30 | 10.75.5.233 – 10.75.5.234 | 10.75.5.235 |
| 124 | 10.75.5.236/30 | 10.75.5.237 – 10.75.5.238 | 10.75.5.239 |
| 125 | 10.75.5.240/30 | 10.75.5.241 – 10.75.5.242 | 10.75.5.243 |
| 126 | 10.75.5.244/30 | 10.75.5.245 – 10.75.5.246 | 10.75.5.247 |
| 127 | 10.75.5.248/30 | 10.75.5.249 – 10.75.5.250 | 10.75.5.251 |
| 128 | 10.75.5.252/30 | 10.75.5.253 – 10.75.5.254 | 10.75.5.255 |
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.