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)172.16.8.192/26
network172.16.8.192/26
broadcast172.16.8.255
first host172.16.8.193
last host172.16.8.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classB
ipcalc 172.16.8.192/26
address10101100.00010000.00001000.11000000
subnet mask11111111.11111111.11111111.11000000
network10101100.00010000.00001000.11000000
broadcast10101100.00010000.00001000.11111111
green = network part, grey = host part
hex0xac1008c0
decimal2886731968
reverse dns192.8.16.172.in-addr.arpa
ipv4-mapped::ffff:ac10:8c0
/26 split into /31 · 32 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 172.16.8.192/31 | 172.16.8.192 – 172.16.8.193 | 172.16.8.193 |
| 2 | 172.16.8.194/31 | 172.16.8.194 – 172.16.8.195 | 172.16.8.195 |
| 3 | 172.16.8.196/31 | 172.16.8.196 – 172.16.8.197 | 172.16.8.197 |
| 4 | 172.16.8.198/31 | 172.16.8.198 – 172.16.8.199 | 172.16.8.199 |
| 5 | 172.16.8.200/31 | 172.16.8.200 – 172.16.8.201 | 172.16.8.201 |
| 6 | 172.16.8.202/31 | 172.16.8.202 – 172.16.8.203 | 172.16.8.203 |
| 7 | 172.16.8.204/31 | 172.16.8.204 – 172.16.8.205 | 172.16.8.205 |
| 8 | 172.16.8.206/31 | 172.16.8.206 – 172.16.8.207 | 172.16.8.207 |
| 9 | 172.16.8.208/31 | 172.16.8.208 – 172.16.8.209 | 172.16.8.209 |
| 10 | 172.16.8.210/31 | 172.16.8.210 – 172.16.8.211 | 172.16.8.211 |
| 11 | 172.16.8.212/31 | 172.16.8.212 – 172.16.8.213 | 172.16.8.213 |
| 12 | 172.16.8.214/31 | 172.16.8.214 – 172.16.8.215 | 172.16.8.215 |
| 13 | 172.16.8.216/31 | 172.16.8.216 – 172.16.8.217 | 172.16.8.217 |
| 14 | 172.16.8.218/31 | 172.16.8.218 – 172.16.8.219 | 172.16.8.219 |
| 15 | 172.16.8.220/31 | 172.16.8.220 – 172.16.8.221 | 172.16.8.221 |
| 16 | 172.16.8.222/31 | 172.16.8.222 – 172.16.8.223 | 172.16.8.223 |
| 17 | 172.16.8.224/31 | 172.16.8.224 – 172.16.8.225 | 172.16.8.225 |
| 18 | 172.16.8.226/31 | 172.16.8.226 – 172.16.8.227 | 172.16.8.227 |
| 19 | 172.16.8.228/31 | 172.16.8.228 – 172.16.8.229 | 172.16.8.229 |
| 20 | 172.16.8.230/31 | 172.16.8.230 – 172.16.8.231 | 172.16.8.231 |
| 21 | 172.16.8.232/31 | 172.16.8.232 – 172.16.8.233 | 172.16.8.233 |
| 22 | 172.16.8.234/31 | 172.16.8.234 – 172.16.8.235 | 172.16.8.235 |
| 23 | 172.16.8.236/31 | 172.16.8.236 – 172.16.8.237 | 172.16.8.237 |
| 24 | 172.16.8.238/31 | 172.16.8.238 – 172.16.8.239 | 172.16.8.239 |
| 25 | 172.16.8.240/31 | 172.16.8.240 – 172.16.8.241 | 172.16.8.241 |
| 26 | 172.16.8.242/31 | 172.16.8.242 – 172.16.8.243 | 172.16.8.243 |
| 27 | 172.16.8.244/31 | 172.16.8.244 – 172.16.8.245 | 172.16.8.245 |
| 28 | 172.16.8.246/31 | 172.16.8.246 – 172.16.8.247 | 172.16.8.247 |
| 29 | 172.16.8.248/31 | 172.16.8.248 – 172.16.8.249 | 172.16.8.249 |
| 30 | 172.16.8.250/31 | 172.16.8.250 – 172.16.8.251 | 172.16.8.251 |
| 31 | 172.16.8.252/31 | 172.16.8.252 – 172.16.8.253 | 172.16.8.253 |
| 32 | 172.16.8.254/31 | 172.16.8.254 – 172.16.8.255 | 172.16.8.255 |
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 /26 |
|---|---|---|---|---|
| /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 | - |
| /24 | 255.255.255.0 | 256 | 254 | - |
| /25 | 255.255.255.128 | 128 | 126 | - |
| /26 | 255.255.255.192 | 64 | 62 | 1 |
| /27 | 255.255.255.224 | 32 | 30 | 2 split → |
| /28 | 255.255.255.240 | 16 | 14 | 4 split → |
| /29 | 255.255.255.248 | 8 | 6 | 8 split → |
| /30 | 255.255.255.252 | 4 | 2 | 16 split → |
| /31 | 255.255.255.254 | 2 | 2 | 32 split → |
| /32 | 255.255.255.255 | 1 | 1 | 64 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.