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)10.63.158.0/23
network10.63.158.0/23
broadcast10.63.159.255
first host10.63.158.1
last host10.63.159.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.63.158.0/23
address00001010.00111111.10011110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00111111.10011110.00000000
broadcast00001010.00111111.10011111.11111111
green = network part, grey = host part
hex0x0a3f9e00
decimal171941376
reverse dns0.158.63.10.in-addr.arpa
ipv4-mapped::ffff:a3f:9e00
/23 split into /29 · 64 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.63.158.0/29 | 10.63.158.1 – 10.63.158.6 | 10.63.158.7 |
| 2 | 10.63.158.8/29 | 10.63.158.9 – 10.63.158.14 | 10.63.158.15 |
| 3 | 10.63.158.16/29 | 10.63.158.17 – 10.63.158.22 | 10.63.158.23 |
| 4 | 10.63.158.24/29 | 10.63.158.25 – 10.63.158.30 | 10.63.158.31 |
| 5 | 10.63.158.32/29 | 10.63.158.33 – 10.63.158.38 | 10.63.158.39 |
| 6 | 10.63.158.40/29 | 10.63.158.41 – 10.63.158.46 | 10.63.158.47 |
| 7 | 10.63.158.48/29 | 10.63.158.49 – 10.63.158.54 | 10.63.158.55 |
| 8 | 10.63.158.56/29 | 10.63.158.57 – 10.63.158.62 | 10.63.158.63 |
| 9 | 10.63.158.64/29 | 10.63.158.65 – 10.63.158.70 | 10.63.158.71 |
| 10 | 10.63.158.72/29 | 10.63.158.73 – 10.63.158.78 | 10.63.158.79 |
| 11 | 10.63.158.80/29 | 10.63.158.81 – 10.63.158.86 | 10.63.158.87 |
| 12 | 10.63.158.88/29 | 10.63.158.89 – 10.63.158.94 | 10.63.158.95 |
| 13 | 10.63.158.96/29 | 10.63.158.97 – 10.63.158.102 | 10.63.158.103 |
| 14 | 10.63.158.104/29 | 10.63.158.105 – 10.63.158.110 | 10.63.158.111 |
| 15 | 10.63.158.112/29 | 10.63.158.113 – 10.63.158.118 | 10.63.158.119 |
| 16 | 10.63.158.120/29 | 10.63.158.121 – 10.63.158.126 | 10.63.158.127 |
| 17 | 10.63.158.128/29 | 10.63.158.129 – 10.63.158.134 | 10.63.158.135 |
| 18 | 10.63.158.136/29 | 10.63.158.137 – 10.63.158.142 | 10.63.158.143 |
| 19 | 10.63.158.144/29 | 10.63.158.145 – 10.63.158.150 | 10.63.158.151 |
| 20 | 10.63.158.152/29 | 10.63.158.153 – 10.63.158.158 | 10.63.158.159 |
| 21 | 10.63.158.160/29 | 10.63.158.161 – 10.63.158.166 | 10.63.158.167 |
| 22 | 10.63.158.168/29 | 10.63.158.169 – 10.63.158.174 | 10.63.158.175 |
| 23 | 10.63.158.176/29 | 10.63.158.177 – 10.63.158.182 | 10.63.158.183 |
| 24 | 10.63.158.184/29 | 10.63.158.185 – 10.63.158.190 | 10.63.158.191 |
| 25 | 10.63.158.192/29 | 10.63.158.193 – 10.63.158.198 | 10.63.158.199 |
| 26 | 10.63.158.200/29 | 10.63.158.201 – 10.63.158.206 | 10.63.158.207 |
| 27 | 10.63.158.208/29 | 10.63.158.209 – 10.63.158.214 | 10.63.158.215 |
| 28 | 10.63.158.216/29 | 10.63.158.217 – 10.63.158.222 | 10.63.158.223 |
| 29 | 10.63.158.224/29 | 10.63.158.225 – 10.63.158.230 | 10.63.158.231 |
| 30 | 10.63.158.232/29 | 10.63.158.233 – 10.63.158.238 | 10.63.158.239 |
| 31 | 10.63.158.240/29 | 10.63.158.241 – 10.63.158.246 | 10.63.158.247 |
| 32 | 10.63.158.248/29 | 10.63.158.249 – 10.63.158.254 | 10.63.158.255 |
| 33 | 10.63.159.0/29 | 10.63.159.1 – 10.63.159.6 | 10.63.159.7 |
| 34 | 10.63.159.8/29 | 10.63.159.9 – 10.63.159.14 | 10.63.159.15 |
| 35 | 10.63.159.16/29 | 10.63.159.17 – 10.63.159.22 | 10.63.159.23 |
| 36 | 10.63.159.24/29 | 10.63.159.25 – 10.63.159.30 | 10.63.159.31 |
| 37 | 10.63.159.32/29 | 10.63.159.33 – 10.63.159.38 | 10.63.159.39 |
| 38 | 10.63.159.40/29 | 10.63.159.41 – 10.63.159.46 | 10.63.159.47 |
| 39 | 10.63.159.48/29 | 10.63.159.49 – 10.63.159.54 | 10.63.159.55 |
| 40 | 10.63.159.56/29 | 10.63.159.57 – 10.63.159.62 | 10.63.159.63 |
| 41 | 10.63.159.64/29 | 10.63.159.65 – 10.63.159.70 | 10.63.159.71 |
| 42 | 10.63.159.72/29 | 10.63.159.73 – 10.63.159.78 | 10.63.159.79 |
| 43 | 10.63.159.80/29 | 10.63.159.81 – 10.63.159.86 | 10.63.159.87 |
| 44 | 10.63.159.88/29 | 10.63.159.89 – 10.63.159.94 | 10.63.159.95 |
| 45 | 10.63.159.96/29 | 10.63.159.97 – 10.63.159.102 | 10.63.159.103 |
| 46 | 10.63.159.104/29 | 10.63.159.105 – 10.63.159.110 | 10.63.159.111 |
| 47 | 10.63.159.112/29 | 10.63.159.113 – 10.63.159.118 | 10.63.159.119 |
| 48 | 10.63.159.120/29 | 10.63.159.121 – 10.63.159.126 | 10.63.159.127 |
| 49 | 10.63.159.128/29 | 10.63.159.129 – 10.63.159.134 | 10.63.159.135 |
| 50 | 10.63.159.136/29 | 10.63.159.137 – 10.63.159.142 | 10.63.159.143 |
| 51 | 10.63.159.144/29 | 10.63.159.145 – 10.63.159.150 | 10.63.159.151 |
| 52 | 10.63.159.152/29 | 10.63.159.153 – 10.63.159.158 | 10.63.159.159 |
| 53 | 10.63.159.160/29 | 10.63.159.161 – 10.63.159.166 | 10.63.159.167 |
| 54 | 10.63.159.168/29 | 10.63.159.169 – 10.63.159.174 | 10.63.159.175 |
| 55 | 10.63.159.176/29 | 10.63.159.177 – 10.63.159.182 | 10.63.159.183 |
| 56 | 10.63.159.184/29 | 10.63.159.185 – 10.63.159.190 | 10.63.159.191 |
| 57 | 10.63.159.192/29 | 10.63.159.193 – 10.63.159.198 | 10.63.159.199 |
| 58 | 10.63.159.200/29 | 10.63.159.201 – 10.63.159.206 | 10.63.159.207 |
| 59 | 10.63.159.208/29 | 10.63.159.209 – 10.63.159.214 | 10.63.159.215 |
| 60 | 10.63.159.216/29 | 10.63.159.217 – 10.63.159.222 | 10.63.159.223 |
| 61 | 10.63.159.224/29 | 10.63.159.225 – 10.63.159.230 | 10.63.159.231 |
| 62 | 10.63.159.232/29 | 10.63.159.233 – 10.63.159.238 | 10.63.159.239 |
| 63 | 10.63.159.240/29 | 10.63.159.241 – 10.63.159.246 | 10.63.159.247 |
| 64 | 10.63.159.248/29 | 10.63.159.249 – 10.63.159.254 | 10.63.159.255 |
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.