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)10.3.124.0/23
network10.3.124.0/23
broadcast10.3.125.255
first host10.3.124.1
last host10.3.125.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.3.124.0/23
address00001010.00000011.01111100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000011.01111100.00000000
broadcast00001010.00000011.01111101.11111111
green = network part, grey = host part
hex0x0a037c00
decimal168000512
reverse dns0.124.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:7c00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.3.124.0/30 | 10.3.124.1 – 10.3.124.2 | 10.3.124.3 |
| 2 | 10.3.124.4/30 | 10.3.124.5 – 10.3.124.6 | 10.3.124.7 |
| 3 | 10.3.124.8/30 | 10.3.124.9 – 10.3.124.10 | 10.3.124.11 |
| 4 | 10.3.124.12/30 | 10.3.124.13 – 10.3.124.14 | 10.3.124.15 |
| 5 | 10.3.124.16/30 | 10.3.124.17 – 10.3.124.18 | 10.3.124.19 |
| 6 | 10.3.124.20/30 | 10.3.124.21 – 10.3.124.22 | 10.3.124.23 |
| 7 | 10.3.124.24/30 | 10.3.124.25 – 10.3.124.26 | 10.3.124.27 |
| 8 | 10.3.124.28/30 | 10.3.124.29 – 10.3.124.30 | 10.3.124.31 |
| 9 | 10.3.124.32/30 | 10.3.124.33 – 10.3.124.34 | 10.3.124.35 |
| 10 | 10.3.124.36/30 | 10.3.124.37 – 10.3.124.38 | 10.3.124.39 |
| 11 | 10.3.124.40/30 | 10.3.124.41 – 10.3.124.42 | 10.3.124.43 |
| 12 | 10.3.124.44/30 | 10.3.124.45 – 10.3.124.46 | 10.3.124.47 |
| 13 | 10.3.124.48/30 | 10.3.124.49 – 10.3.124.50 | 10.3.124.51 |
| 14 | 10.3.124.52/30 | 10.3.124.53 – 10.3.124.54 | 10.3.124.55 |
| 15 | 10.3.124.56/30 | 10.3.124.57 – 10.3.124.58 | 10.3.124.59 |
| 16 | 10.3.124.60/30 | 10.3.124.61 – 10.3.124.62 | 10.3.124.63 |
| 17 | 10.3.124.64/30 | 10.3.124.65 – 10.3.124.66 | 10.3.124.67 |
| 18 | 10.3.124.68/30 | 10.3.124.69 – 10.3.124.70 | 10.3.124.71 |
| 19 | 10.3.124.72/30 | 10.3.124.73 – 10.3.124.74 | 10.3.124.75 |
| 20 | 10.3.124.76/30 | 10.3.124.77 – 10.3.124.78 | 10.3.124.79 |
| 21 | 10.3.124.80/30 | 10.3.124.81 – 10.3.124.82 | 10.3.124.83 |
| 22 | 10.3.124.84/30 | 10.3.124.85 – 10.3.124.86 | 10.3.124.87 |
| 23 | 10.3.124.88/30 | 10.3.124.89 – 10.3.124.90 | 10.3.124.91 |
| 24 | 10.3.124.92/30 | 10.3.124.93 – 10.3.124.94 | 10.3.124.95 |
| 25 | 10.3.124.96/30 | 10.3.124.97 – 10.3.124.98 | 10.3.124.99 |
| 26 | 10.3.124.100/30 | 10.3.124.101 – 10.3.124.102 | 10.3.124.103 |
| 27 | 10.3.124.104/30 | 10.3.124.105 – 10.3.124.106 | 10.3.124.107 |
| 28 | 10.3.124.108/30 | 10.3.124.109 – 10.3.124.110 | 10.3.124.111 |
| 29 | 10.3.124.112/30 | 10.3.124.113 – 10.3.124.114 | 10.3.124.115 |
| 30 | 10.3.124.116/30 | 10.3.124.117 – 10.3.124.118 | 10.3.124.119 |
| 31 | 10.3.124.120/30 | 10.3.124.121 – 10.3.124.122 | 10.3.124.123 |
| 32 | 10.3.124.124/30 | 10.3.124.125 – 10.3.124.126 | 10.3.124.127 |
| 33 | 10.3.124.128/30 | 10.3.124.129 – 10.3.124.130 | 10.3.124.131 |
| 34 | 10.3.124.132/30 | 10.3.124.133 – 10.3.124.134 | 10.3.124.135 |
| 35 | 10.3.124.136/30 | 10.3.124.137 – 10.3.124.138 | 10.3.124.139 |
| 36 | 10.3.124.140/30 | 10.3.124.141 – 10.3.124.142 | 10.3.124.143 |
| 37 | 10.3.124.144/30 | 10.3.124.145 – 10.3.124.146 | 10.3.124.147 |
| 38 | 10.3.124.148/30 | 10.3.124.149 – 10.3.124.150 | 10.3.124.151 |
| 39 | 10.3.124.152/30 | 10.3.124.153 – 10.3.124.154 | 10.3.124.155 |
| 40 | 10.3.124.156/30 | 10.3.124.157 – 10.3.124.158 | 10.3.124.159 |
| 41 | 10.3.124.160/30 | 10.3.124.161 – 10.3.124.162 | 10.3.124.163 |
| 42 | 10.3.124.164/30 | 10.3.124.165 – 10.3.124.166 | 10.3.124.167 |
| 43 | 10.3.124.168/30 | 10.3.124.169 – 10.3.124.170 | 10.3.124.171 |
| 44 | 10.3.124.172/30 | 10.3.124.173 – 10.3.124.174 | 10.3.124.175 |
| 45 | 10.3.124.176/30 | 10.3.124.177 – 10.3.124.178 | 10.3.124.179 |
| 46 | 10.3.124.180/30 | 10.3.124.181 – 10.3.124.182 | 10.3.124.183 |
| 47 | 10.3.124.184/30 | 10.3.124.185 – 10.3.124.186 | 10.3.124.187 |
| 48 | 10.3.124.188/30 | 10.3.124.189 – 10.3.124.190 | 10.3.124.191 |
| 49 | 10.3.124.192/30 | 10.3.124.193 – 10.3.124.194 | 10.3.124.195 |
| 50 | 10.3.124.196/30 | 10.3.124.197 – 10.3.124.198 | 10.3.124.199 |
| 51 | 10.3.124.200/30 | 10.3.124.201 – 10.3.124.202 | 10.3.124.203 |
| 52 | 10.3.124.204/30 | 10.3.124.205 – 10.3.124.206 | 10.3.124.207 |
| 53 | 10.3.124.208/30 | 10.3.124.209 – 10.3.124.210 | 10.3.124.211 |
| 54 | 10.3.124.212/30 | 10.3.124.213 – 10.3.124.214 | 10.3.124.215 |
| 55 | 10.3.124.216/30 | 10.3.124.217 – 10.3.124.218 | 10.3.124.219 |
| 56 | 10.3.124.220/30 | 10.3.124.221 – 10.3.124.222 | 10.3.124.223 |
| 57 | 10.3.124.224/30 | 10.3.124.225 – 10.3.124.226 | 10.3.124.227 |
| 58 | 10.3.124.228/30 | 10.3.124.229 – 10.3.124.230 | 10.3.124.231 |
| 59 | 10.3.124.232/30 | 10.3.124.233 – 10.3.124.234 | 10.3.124.235 |
| 60 | 10.3.124.236/30 | 10.3.124.237 – 10.3.124.238 | 10.3.124.239 |
| 61 | 10.3.124.240/30 | 10.3.124.241 – 10.3.124.242 | 10.3.124.243 |
| 62 | 10.3.124.244/30 | 10.3.124.245 – 10.3.124.246 | 10.3.124.247 |
| 63 | 10.3.124.248/30 | 10.3.124.249 – 10.3.124.250 | 10.3.124.251 |
| 64 | 10.3.124.252/30 | 10.3.124.253 – 10.3.124.254 | 10.3.124.255 |
| 65 | 10.3.125.0/30 | 10.3.125.1 – 10.3.125.2 | 10.3.125.3 |
| 66 | 10.3.125.4/30 | 10.3.125.5 – 10.3.125.6 | 10.3.125.7 |
| 67 | 10.3.125.8/30 | 10.3.125.9 – 10.3.125.10 | 10.3.125.11 |
| 68 | 10.3.125.12/30 | 10.3.125.13 – 10.3.125.14 | 10.3.125.15 |
| 69 | 10.3.125.16/30 | 10.3.125.17 – 10.3.125.18 | 10.3.125.19 |
| 70 | 10.3.125.20/30 | 10.3.125.21 – 10.3.125.22 | 10.3.125.23 |
| 71 | 10.3.125.24/30 | 10.3.125.25 – 10.3.125.26 | 10.3.125.27 |
| 72 | 10.3.125.28/30 | 10.3.125.29 – 10.3.125.30 | 10.3.125.31 |
| 73 | 10.3.125.32/30 | 10.3.125.33 – 10.3.125.34 | 10.3.125.35 |
| 74 | 10.3.125.36/30 | 10.3.125.37 – 10.3.125.38 | 10.3.125.39 |
| 75 | 10.3.125.40/30 | 10.3.125.41 – 10.3.125.42 | 10.3.125.43 |
| 76 | 10.3.125.44/30 | 10.3.125.45 – 10.3.125.46 | 10.3.125.47 |
| 77 | 10.3.125.48/30 | 10.3.125.49 – 10.3.125.50 | 10.3.125.51 |
| 78 | 10.3.125.52/30 | 10.3.125.53 – 10.3.125.54 | 10.3.125.55 |
| 79 | 10.3.125.56/30 | 10.3.125.57 – 10.3.125.58 | 10.3.125.59 |
| 80 | 10.3.125.60/30 | 10.3.125.61 – 10.3.125.62 | 10.3.125.63 |
| 81 | 10.3.125.64/30 | 10.3.125.65 – 10.3.125.66 | 10.3.125.67 |
| 82 | 10.3.125.68/30 | 10.3.125.69 – 10.3.125.70 | 10.3.125.71 |
| 83 | 10.3.125.72/30 | 10.3.125.73 – 10.3.125.74 | 10.3.125.75 |
| 84 | 10.3.125.76/30 | 10.3.125.77 – 10.3.125.78 | 10.3.125.79 |
| 85 | 10.3.125.80/30 | 10.3.125.81 – 10.3.125.82 | 10.3.125.83 |
| 86 | 10.3.125.84/30 | 10.3.125.85 – 10.3.125.86 | 10.3.125.87 |
| 87 | 10.3.125.88/30 | 10.3.125.89 – 10.3.125.90 | 10.3.125.91 |
| 88 | 10.3.125.92/30 | 10.3.125.93 – 10.3.125.94 | 10.3.125.95 |
| 89 | 10.3.125.96/30 | 10.3.125.97 – 10.3.125.98 | 10.3.125.99 |
| 90 | 10.3.125.100/30 | 10.3.125.101 – 10.3.125.102 | 10.3.125.103 |
| 91 | 10.3.125.104/30 | 10.3.125.105 – 10.3.125.106 | 10.3.125.107 |
| 92 | 10.3.125.108/30 | 10.3.125.109 – 10.3.125.110 | 10.3.125.111 |
| 93 | 10.3.125.112/30 | 10.3.125.113 – 10.3.125.114 | 10.3.125.115 |
| 94 | 10.3.125.116/30 | 10.3.125.117 – 10.3.125.118 | 10.3.125.119 |
| 95 | 10.3.125.120/30 | 10.3.125.121 – 10.3.125.122 | 10.3.125.123 |
| 96 | 10.3.125.124/30 | 10.3.125.125 – 10.3.125.126 | 10.3.125.127 |
| 97 | 10.3.125.128/30 | 10.3.125.129 – 10.3.125.130 | 10.3.125.131 |
| 98 | 10.3.125.132/30 | 10.3.125.133 – 10.3.125.134 | 10.3.125.135 |
| 99 | 10.3.125.136/30 | 10.3.125.137 – 10.3.125.138 | 10.3.125.139 |
| 100 | 10.3.125.140/30 | 10.3.125.141 – 10.3.125.142 | 10.3.125.143 |
| 101 | 10.3.125.144/30 | 10.3.125.145 – 10.3.125.146 | 10.3.125.147 |
| 102 | 10.3.125.148/30 | 10.3.125.149 – 10.3.125.150 | 10.3.125.151 |
| 103 | 10.3.125.152/30 | 10.3.125.153 – 10.3.125.154 | 10.3.125.155 |
| 104 | 10.3.125.156/30 | 10.3.125.157 – 10.3.125.158 | 10.3.125.159 |
| 105 | 10.3.125.160/30 | 10.3.125.161 – 10.3.125.162 | 10.3.125.163 |
| 106 | 10.3.125.164/30 | 10.3.125.165 – 10.3.125.166 | 10.3.125.167 |
| 107 | 10.3.125.168/30 | 10.3.125.169 – 10.3.125.170 | 10.3.125.171 |
| 108 | 10.3.125.172/30 | 10.3.125.173 – 10.3.125.174 | 10.3.125.175 |
| 109 | 10.3.125.176/30 | 10.3.125.177 – 10.3.125.178 | 10.3.125.179 |
| 110 | 10.3.125.180/30 | 10.3.125.181 – 10.3.125.182 | 10.3.125.183 |
| 111 | 10.3.125.184/30 | 10.3.125.185 – 10.3.125.186 | 10.3.125.187 |
| 112 | 10.3.125.188/30 | 10.3.125.189 – 10.3.125.190 | 10.3.125.191 |
| 113 | 10.3.125.192/30 | 10.3.125.193 – 10.3.125.194 | 10.3.125.195 |
| 114 | 10.3.125.196/30 | 10.3.125.197 – 10.3.125.198 | 10.3.125.199 |
| 115 | 10.3.125.200/30 | 10.3.125.201 – 10.3.125.202 | 10.3.125.203 |
| 116 | 10.3.125.204/30 | 10.3.125.205 – 10.3.125.206 | 10.3.125.207 |
| 117 | 10.3.125.208/30 | 10.3.125.209 – 10.3.125.210 | 10.3.125.211 |
| 118 | 10.3.125.212/30 | 10.3.125.213 – 10.3.125.214 | 10.3.125.215 |
| 119 | 10.3.125.216/30 | 10.3.125.217 – 10.3.125.218 | 10.3.125.219 |
| 120 | 10.3.125.220/30 | 10.3.125.221 – 10.3.125.222 | 10.3.125.223 |
| 121 | 10.3.125.224/30 | 10.3.125.225 – 10.3.125.226 | 10.3.125.227 |
| 122 | 10.3.125.228/30 | 10.3.125.229 – 10.3.125.230 | 10.3.125.231 |
| 123 | 10.3.125.232/30 | 10.3.125.233 – 10.3.125.234 | 10.3.125.235 |
| 124 | 10.3.125.236/30 | 10.3.125.237 – 10.3.125.238 | 10.3.125.239 |
| 125 | 10.3.125.240/30 | 10.3.125.241 – 10.3.125.242 | 10.3.125.243 |
| 126 | 10.3.125.244/30 | 10.3.125.245 – 10.3.125.246 | 10.3.125.247 |
| 127 | 10.3.125.248/30 | 10.3.125.249 – 10.3.125.250 | 10.3.125.251 |
| 128 | 10.3.125.252/30 | 10.3.125.253 – 10.3.125.254 | 10.3.125.255 |
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.