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)10.149.182.0/23
network10.149.182.0/23
broadcast10.149.183.255
first host10.149.182.1
last host10.149.183.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.149.182.0/23
address00001010.10010101.10110110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10010101.10110110.00000000
broadcast00001010.10010101.10110111.11111111
green = network part, grey = host part
hex0x0a95b600
decimal177583616
reverse dns0.182.149.10.in-addr.arpa
ipv4-mapped::ffff:a95:b600
/23 split into /29 · 64 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.149.182.0/29 | 10.149.182.1 – 10.149.182.6 | 10.149.182.7 |
| 2 | 10.149.182.8/29 | 10.149.182.9 – 10.149.182.14 | 10.149.182.15 |
| 3 | 10.149.182.16/29 | 10.149.182.17 – 10.149.182.22 | 10.149.182.23 |
| 4 | 10.149.182.24/29 | 10.149.182.25 – 10.149.182.30 | 10.149.182.31 |
| 5 | 10.149.182.32/29 | 10.149.182.33 – 10.149.182.38 | 10.149.182.39 |
| 6 | 10.149.182.40/29 | 10.149.182.41 – 10.149.182.46 | 10.149.182.47 |
| 7 | 10.149.182.48/29 | 10.149.182.49 – 10.149.182.54 | 10.149.182.55 |
| 8 | 10.149.182.56/29 | 10.149.182.57 – 10.149.182.62 | 10.149.182.63 |
| 9 | 10.149.182.64/29 | 10.149.182.65 – 10.149.182.70 | 10.149.182.71 |
| 10 | 10.149.182.72/29 | 10.149.182.73 – 10.149.182.78 | 10.149.182.79 |
| 11 | 10.149.182.80/29 | 10.149.182.81 – 10.149.182.86 | 10.149.182.87 |
| 12 | 10.149.182.88/29 | 10.149.182.89 – 10.149.182.94 | 10.149.182.95 |
| 13 | 10.149.182.96/29 | 10.149.182.97 – 10.149.182.102 | 10.149.182.103 |
| 14 | 10.149.182.104/29 | 10.149.182.105 – 10.149.182.110 | 10.149.182.111 |
| 15 | 10.149.182.112/29 | 10.149.182.113 – 10.149.182.118 | 10.149.182.119 |
| 16 | 10.149.182.120/29 | 10.149.182.121 – 10.149.182.126 | 10.149.182.127 |
| 17 | 10.149.182.128/29 | 10.149.182.129 – 10.149.182.134 | 10.149.182.135 |
| 18 | 10.149.182.136/29 | 10.149.182.137 – 10.149.182.142 | 10.149.182.143 |
| 19 | 10.149.182.144/29 | 10.149.182.145 – 10.149.182.150 | 10.149.182.151 |
| 20 | 10.149.182.152/29 | 10.149.182.153 – 10.149.182.158 | 10.149.182.159 |
| 21 | 10.149.182.160/29 | 10.149.182.161 – 10.149.182.166 | 10.149.182.167 |
| 22 | 10.149.182.168/29 | 10.149.182.169 – 10.149.182.174 | 10.149.182.175 |
| 23 | 10.149.182.176/29 | 10.149.182.177 – 10.149.182.182 | 10.149.182.183 |
| 24 | 10.149.182.184/29 | 10.149.182.185 – 10.149.182.190 | 10.149.182.191 |
| 25 | 10.149.182.192/29 | 10.149.182.193 – 10.149.182.198 | 10.149.182.199 |
| 26 | 10.149.182.200/29 | 10.149.182.201 – 10.149.182.206 | 10.149.182.207 |
| 27 | 10.149.182.208/29 | 10.149.182.209 – 10.149.182.214 | 10.149.182.215 |
| 28 | 10.149.182.216/29 | 10.149.182.217 – 10.149.182.222 | 10.149.182.223 |
| 29 | 10.149.182.224/29 | 10.149.182.225 – 10.149.182.230 | 10.149.182.231 |
| 30 | 10.149.182.232/29 | 10.149.182.233 – 10.149.182.238 | 10.149.182.239 |
| 31 | 10.149.182.240/29 | 10.149.182.241 – 10.149.182.246 | 10.149.182.247 |
| 32 | 10.149.182.248/29 | 10.149.182.249 – 10.149.182.254 | 10.149.182.255 |
| 33 | 10.149.183.0/29 | 10.149.183.1 – 10.149.183.6 | 10.149.183.7 |
| 34 | 10.149.183.8/29 | 10.149.183.9 – 10.149.183.14 | 10.149.183.15 |
| 35 | 10.149.183.16/29 | 10.149.183.17 – 10.149.183.22 | 10.149.183.23 |
| 36 | 10.149.183.24/29 | 10.149.183.25 – 10.149.183.30 | 10.149.183.31 |
| 37 | 10.149.183.32/29 | 10.149.183.33 – 10.149.183.38 | 10.149.183.39 |
| 38 | 10.149.183.40/29 | 10.149.183.41 – 10.149.183.46 | 10.149.183.47 |
| 39 | 10.149.183.48/29 | 10.149.183.49 – 10.149.183.54 | 10.149.183.55 |
| 40 | 10.149.183.56/29 | 10.149.183.57 – 10.149.183.62 | 10.149.183.63 |
| 41 | 10.149.183.64/29 | 10.149.183.65 – 10.149.183.70 | 10.149.183.71 |
| 42 | 10.149.183.72/29 | 10.149.183.73 – 10.149.183.78 | 10.149.183.79 |
| 43 | 10.149.183.80/29 | 10.149.183.81 – 10.149.183.86 | 10.149.183.87 |
| 44 | 10.149.183.88/29 | 10.149.183.89 – 10.149.183.94 | 10.149.183.95 |
| 45 | 10.149.183.96/29 | 10.149.183.97 – 10.149.183.102 | 10.149.183.103 |
| 46 | 10.149.183.104/29 | 10.149.183.105 – 10.149.183.110 | 10.149.183.111 |
| 47 | 10.149.183.112/29 | 10.149.183.113 – 10.149.183.118 | 10.149.183.119 |
| 48 | 10.149.183.120/29 | 10.149.183.121 – 10.149.183.126 | 10.149.183.127 |
| 49 | 10.149.183.128/29 | 10.149.183.129 – 10.149.183.134 | 10.149.183.135 |
| 50 | 10.149.183.136/29 | 10.149.183.137 – 10.149.183.142 | 10.149.183.143 |
| 51 | 10.149.183.144/29 | 10.149.183.145 – 10.149.183.150 | 10.149.183.151 |
| 52 | 10.149.183.152/29 | 10.149.183.153 – 10.149.183.158 | 10.149.183.159 |
| 53 | 10.149.183.160/29 | 10.149.183.161 – 10.149.183.166 | 10.149.183.167 |
| 54 | 10.149.183.168/29 | 10.149.183.169 – 10.149.183.174 | 10.149.183.175 |
| 55 | 10.149.183.176/29 | 10.149.183.177 – 10.149.183.182 | 10.149.183.183 |
| 56 | 10.149.183.184/29 | 10.149.183.185 – 10.149.183.190 | 10.149.183.191 |
| 57 | 10.149.183.192/29 | 10.149.183.193 – 10.149.183.198 | 10.149.183.199 |
| 58 | 10.149.183.200/29 | 10.149.183.201 – 10.149.183.206 | 10.149.183.207 |
| 59 | 10.149.183.208/29 | 10.149.183.209 – 10.149.183.214 | 10.149.183.215 |
| 60 | 10.149.183.216/29 | 10.149.183.217 – 10.149.183.222 | 10.149.183.223 |
| 61 | 10.149.183.224/29 | 10.149.183.225 – 10.149.183.230 | 10.149.183.231 |
| 62 | 10.149.183.232/29 | 10.149.183.233 – 10.149.183.238 | 10.149.183.239 |
| 63 | 10.149.183.240/29 | 10.149.183.241 – 10.149.183.246 | 10.149.183.247 |
| 64 | 10.149.183.248/29 | 10.149.183.249 – 10.149.183.254 | 10.149.183.255 |
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.