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)10.239.48.0/23
network10.239.48.0/23
broadcast10.239.49.255
first host10.239.48.1
last host10.239.49.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.239.48.0/23
address00001010.11101111.00110000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11101111.00110000.00000000
broadcast00001010.11101111.00110001.11111111
green = network part, grey = host part
hex0x0aef3000
decimal183447552
reverse dns0.48.239.10.in-addr.arpa
ipv4-mapped::ffff:aef:3000
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.239.48.0/30 | 10.239.48.1 – 10.239.48.2 | 10.239.48.3 |
| 2 | 10.239.48.4/30 | 10.239.48.5 – 10.239.48.6 | 10.239.48.7 |
| 3 | 10.239.48.8/30 | 10.239.48.9 – 10.239.48.10 | 10.239.48.11 |
| 4 | 10.239.48.12/30 | 10.239.48.13 – 10.239.48.14 | 10.239.48.15 |
| 5 | 10.239.48.16/30 | 10.239.48.17 – 10.239.48.18 | 10.239.48.19 |
| 6 | 10.239.48.20/30 | 10.239.48.21 – 10.239.48.22 | 10.239.48.23 |
| 7 | 10.239.48.24/30 | 10.239.48.25 – 10.239.48.26 | 10.239.48.27 |
| 8 | 10.239.48.28/30 | 10.239.48.29 – 10.239.48.30 | 10.239.48.31 |
| 9 | 10.239.48.32/30 | 10.239.48.33 – 10.239.48.34 | 10.239.48.35 |
| 10 | 10.239.48.36/30 | 10.239.48.37 – 10.239.48.38 | 10.239.48.39 |
| 11 | 10.239.48.40/30 | 10.239.48.41 – 10.239.48.42 | 10.239.48.43 |
| 12 | 10.239.48.44/30 | 10.239.48.45 – 10.239.48.46 | 10.239.48.47 |
| 13 | 10.239.48.48/30 | 10.239.48.49 – 10.239.48.50 | 10.239.48.51 |
| 14 | 10.239.48.52/30 | 10.239.48.53 – 10.239.48.54 | 10.239.48.55 |
| 15 | 10.239.48.56/30 | 10.239.48.57 – 10.239.48.58 | 10.239.48.59 |
| 16 | 10.239.48.60/30 | 10.239.48.61 – 10.239.48.62 | 10.239.48.63 |
| 17 | 10.239.48.64/30 | 10.239.48.65 – 10.239.48.66 | 10.239.48.67 |
| 18 | 10.239.48.68/30 | 10.239.48.69 – 10.239.48.70 | 10.239.48.71 |
| 19 | 10.239.48.72/30 | 10.239.48.73 – 10.239.48.74 | 10.239.48.75 |
| 20 | 10.239.48.76/30 | 10.239.48.77 – 10.239.48.78 | 10.239.48.79 |
| 21 | 10.239.48.80/30 | 10.239.48.81 – 10.239.48.82 | 10.239.48.83 |
| 22 | 10.239.48.84/30 | 10.239.48.85 – 10.239.48.86 | 10.239.48.87 |
| 23 | 10.239.48.88/30 | 10.239.48.89 – 10.239.48.90 | 10.239.48.91 |
| 24 | 10.239.48.92/30 | 10.239.48.93 – 10.239.48.94 | 10.239.48.95 |
| 25 | 10.239.48.96/30 | 10.239.48.97 – 10.239.48.98 | 10.239.48.99 |
| 26 | 10.239.48.100/30 | 10.239.48.101 – 10.239.48.102 | 10.239.48.103 |
| 27 | 10.239.48.104/30 | 10.239.48.105 – 10.239.48.106 | 10.239.48.107 |
| 28 | 10.239.48.108/30 | 10.239.48.109 – 10.239.48.110 | 10.239.48.111 |
| 29 | 10.239.48.112/30 | 10.239.48.113 – 10.239.48.114 | 10.239.48.115 |
| 30 | 10.239.48.116/30 | 10.239.48.117 – 10.239.48.118 | 10.239.48.119 |
| 31 | 10.239.48.120/30 | 10.239.48.121 – 10.239.48.122 | 10.239.48.123 |
| 32 | 10.239.48.124/30 | 10.239.48.125 – 10.239.48.126 | 10.239.48.127 |
| 33 | 10.239.48.128/30 | 10.239.48.129 – 10.239.48.130 | 10.239.48.131 |
| 34 | 10.239.48.132/30 | 10.239.48.133 – 10.239.48.134 | 10.239.48.135 |
| 35 | 10.239.48.136/30 | 10.239.48.137 – 10.239.48.138 | 10.239.48.139 |
| 36 | 10.239.48.140/30 | 10.239.48.141 – 10.239.48.142 | 10.239.48.143 |
| 37 | 10.239.48.144/30 | 10.239.48.145 – 10.239.48.146 | 10.239.48.147 |
| 38 | 10.239.48.148/30 | 10.239.48.149 – 10.239.48.150 | 10.239.48.151 |
| 39 | 10.239.48.152/30 | 10.239.48.153 – 10.239.48.154 | 10.239.48.155 |
| 40 | 10.239.48.156/30 | 10.239.48.157 – 10.239.48.158 | 10.239.48.159 |
| 41 | 10.239.48.160/30 | 10.239.48.161 – 10.239.48.162 | 10.239.48.163 |
| 42 | 10.239.48.164/30 | 10.239.48.165 – 10.239.48.166 | 10.239.48.167 |
| 43 | 10.239.48.168/30 | 10.239.48.169 – 10.239.48.170 | 10.239.48.171 |
| 44 | 10.239.48.172/30 | 10.239.48.173 – 10.239.48.174 | 10.239.48.175 |
| 45 | 10.239.48.176/30 | 10.239.48.177 – 10.239.48.178 | 10.239.48.179 |
| 46 | 10.239.48.180/30 | 10.239.48.181 – 10.239.48.182 | 10.239.48.183 |
| 47 | 10.239.48.184/30 | 10.239.48.185 – 10.239.48.186 | 10.239.48.187 |
| 48 | 10.239.48.188/30 | 10.239.48.189 – 10.239.48.190 | 10.239.48.191 |
| 49 | 10.239.48.192/30 | 10.239.48.193 – 10.239.48.194 | 10.239.48.195 |
| 50 | 10.239.48.196/30 | 10.239.48.197 – 10.239.48.198 | 10.239.48.199 |
| 51 | 10.239.48.200/30 | 10.239.48.201 – 10.239.48.202 | 10.239.48.203 |
| 52 | 10.239.48.204/30 | 10.239.48.205 – 10.239.48.206 | 10.239.48.207 |
| 53 | 10.239.48.208/30 | 10.239.48.209 – 10.239.48.210 | 10.239.48.211 |
| 54 | 10.239.48.212/30 | 10.239.48.213 – 10.239.48.214 | 10.239.48.215 |
| 55 | 10.239.48.216/30 | 10.239.48.217 – 10.239.48.218 | 10.239.48.219 |
| 56 | 10.239.48.220/30 | 10.239.48.221 – 10.239.48.222 | 10.239.48.223 |
| 57 | 10.239.48.224/30 | 10.239.48.225 – 10.239.48.226 | 10.239.48.227 |
| 58 | 10.239.48.228/30 | 10.239.48.229 – 10.239.48.230 | 10.239.48.231 |
| 59 | 10.239.48.232/30 | 10.239.48.233 – 10.239.48.234 | 10.239.48.235 |
| 60 | 10.239.48.236/30 | 10.239.48.237 – 10.239.48.238 | 10.239.48.239 |
| 61 | 10.239.48.240/30 | 10.239.48.241 – 10.239.48.242 | 10.239.48.243 |
| 62 | 10.239.48.244/30 | 10.239.48.245 – 10.239.48.246 | 10.239.48.247 |
| 63 | 10.239.48.248/30 | 10.239.48.249 – 10.239.48.250 | 10.239.48.251 |
| 64 | 10.239.48.252/30 | 10.239.48.253 – 10.239.48.254 | 10.239.48.255 |
| 65 | 10.239.49.0/30 | 10.239.49.1 – 10.239.49.2 | 10.239.49.3 |
| 66 | 10.239.49.4/30 | 10.239.49.5 – 10.239.49.6 | 10.239.49.7 |
| 67 | 10.239.49.8/30 | 10.239.49.9 – 10.239.49.10 | 10.239.49.11 |
| 68 | 10.239.49.12/30 | 10.239.49.13 – 10.239.49.14 | 10.239.49.15 |
| 69 | 10.239.49.16/30 | 10.239.49.17 – 10.239.49.18 | 10.239.49.19 |
| 70 | 10.239.49.20/30 | 10.239.49.21 – 10.239.49.22 | 10.239.49.23 |
| 71 | 10.239.49.24/30 | 10.239.49.25 – 10.239.49.26 | 10.239.49.27 |
| 72 | 10.239.49.28/30 | 10.239.49.29 – 10.239.49.30 | 10.239.49.31 |
| 73 | 10.239.49.32/30 | 10.239.49.33 – 10.239.49.34 | 10.239.49.35 |
| 74 | 10.239.49.36/30 | 10.239.49.37 – 10.239.49.38 | 10.239.49.39 |
| 75 | 10.239.49.40/30 | 10.239.49.41 – 10.239.49.42 | 10.239.49.43 |
| 76 | 10.239.49.44/30 | 10.239.49.45 – 10.239.49.46 | 10.239.49.47 |
| 77 | 10.239.49.48/30 | 10.239.49.49 – 10.239.49.50 | 10.239.49.51 |
| 78 | 10.239.49.52/30 | 10.239.49.53 – 10.239.49.54 | 10.239.49.55 |
| 79 | 10.239.49.56/30 | 10.239.49.57 – 10.239.49.58 | 10.239.49.59 |
| 80 | 10.239.49.60/30 | 10.239.49.61 – 10.239.49.62 | 10.239.49.63 |
| 81 | 10.239.49.64/30 | 10.239.49.65 – 10.239.49.66 | 10.239.49.67 |
| 82 | 10.239.49.68/30 | 10.239.49.69 – 10.239.49.70 | 10.239.49.71 |
| 83 | 10.239.49.72/30 | 10.239.49.73 – 10.239.49.74 | 10.239.49.75 |
| 84 | 10.239.49.76/30 | 10.239.49.77 – 10.239.49.78 | 10.239.49.79 |
| 85 | 10.239.49.80/30 | 10.239.49.81 – 10.239.49.82 | 10.239.49.83 |
| 86 | 10.239.49.84/30 | 10.239.49.85 – 10.239.49.86 | 10.239.49.87 |
| 87 | 10.239.49.88/30 | 10.239.49.89 – 10.239.49.90 | 10.239.49.91 |
| 88 | 10.239.49.92/30 | 10.239.49.93 – 10.239.49.94 | 10.239.49.95 |
| 89 | 10.239.49.96/30 | 10.239.49.97 – 10.239.49.98 | 10.239.49.99 |
| 90 | 10.239.49.100/30 | 10.239.49.101 – 10.239.49.102 | 10.239.49.103 |
| 91 | 10.239.49.104/30 | 10.239.49.105 – 10.239.49.106 | 10.239.49.107 |
| 92 | 10.239.49.108/30 | 10.239.49.109 – 10.239.49.110 | 10.239.49.111 |
| 93 | 10.239.49.112/30 | 10.239.49.113 – 10.239.49.114 | 10.239.49.115 |
| 94 | 10.239.49.116/30 | 10.239.49.117 – 10.239.49.118 | 10.239.49.119 |
| 95 | 10.239.49.120/30 | 10.239.49.121 – 10.239.49.122 | 10.239.49.123 |
| 96 | 10.239.49.124/30 | 10.239.49.125 – 10.239.49.126 | 10.239.49.127 |
| 97 | 10.239.49.128/30 | 10.239.49.129 – 10.239.49.130 | 10.239.49.131 |
| 98 | 10.239.49.132/30 | 10.239.49.133 – 10.239.49.134 | 10.239.49.135 |
| 99 | 10.239.49.136/30 | 10.239.49.137 – 10.239.49.138 | 10.239.49.139 |
| 100 | 10.239.49.140/30 | 10.239.49.141 – 10.239.49.142 | 10.239.49.143 |
| 101 | 10.239.49.144/30 | 10.239.49.145 – 10.239.49.146 | 10.239.49.147 |
| 102 | 10.239.49.148/30 | 10.239.49.149 – 10.239.49.150 | 10.239.49.151 |
| 103 | 10.239.49.152/30 | 10.239.49.153 – 10.239.49.154 | 10.239.49.155 |
| 104 | 10.239.49.156/30 | 10.239.49.157 – 10.239.49.158 | 10.239.49.159 |
| 105 | 10.239.49.160/30 | 10.239.49.161 – 10.239.49.162 | 10.239.49.163 |
| 106 | 10.239.49.164/30 | 10.239.49.165 – 10.239.49.166 | 10.239.49.167 |
| 107 | 10.239.49.168/30 | 10.239.49.169 – 10.239.49.170 | 10.239.49.171 |
| 108 | 10.239.49.172/30 | 10.239.49.173 – 10.239.49.174 | 10.239.49.175 |
| 109 | 10.239.49.176/30 | 10.239.49.177 – 10.239.49.178 | 10.239.49.179 |
| 110 | 10.239.49.180/30 | 10.239.49.181 – 10.239.49.182 | 10.239.49.183 |
| 111 | 10.239.49.184/30 | 10.239.49.185 – 10.239.49.186 | 10.239.49.187 |
| 112 | 10.239.49.188/30 | 10.239.49.189 – 10.239.49.190 | 10.239.49.191 |
| 113 | 10.239.49.192/30 | 10.239.49.193 – 10.239.49.194 | 10.239.49.195 |
| 114 | 10.239.49.196/30 | 10.239.49.197 – 10.239.49.198 | 10.239.49.199 |
| 115 | 10.239.49.200/30 | 10.239.49.201 – 10.239.49.202 | 10.239.49.203 |
| 116 | 10.239.49.204/30 | 10.239.49.205 – 10.239.49.206 | 10.239.49.207 |
| 117 | 10.239.49.208/30 | 10.239.49.209 – 10.239.49.210 | 10.239.49.211 |
| 118 | 10.239.49.212/30 | 10.239.49.213 – 10.239.49.214 | 10.239.49.215 |
| 119 | 10.239.49.216/30 | 10.239.49.217 – 10.239.49.218 | 10.239.49.219 |
| 120 | 10.239.49.220/30 | 10.239.49.221 – 10.239.49.222 | 10.239.49.223 |
| 121 | 10.239.49.224/30 | 10.239.49.225 – 10.239.49.226 | 10.239.49.227 |
| 122 | 10.239.49.228/30 | 10.239.49.229 – 10.239.49.230 | 10.239.49.231 |
| 123 | 10.239.49.232/30 | 10.239.49.233 – 10.239.49.234 | 10.239.49.235 |
| 124 | 10.239.49.236/30 | 10.239.49.237 – 10.239.49.238 | 10.239.49.239 |
| 125 | 10.239.49.240/30 | 10.239.49.241 – 10.239.49.242 | 10.239.49.243 |
| 126 | 10.239.49.244/30 | 10.239.49.245 – 10.239.49.246 | 10.239.49.247 |
| 127 | 10.239.49.248/30 | 10.239.49.249 – 10.239.49.250 | 10.239.49.251 |
| 128 | 10.239.49.252/30 | 10.239.49.253 – 10.239.49.254 | 10.239.49.255 |
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.