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)10.2.85.0/26
network10.2.85.0/26
broadcast10.2.85.63
first host10.2.85.1
last host10.2.85.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.85.0/26
address00001010.00000010.01010101.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.01010101.00000000
broadcast00001010.00000010.01010101.00111111
green = network part, grey = host part
hex0x0a025500
decimal167924992
reverse dns0.85.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:5500
/26 split into /31 · 32 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.2.85.0/31 | 10.2.85.0 – 10.2.85.1 | 10.2.85.1 |
| 2 | 10.2.85.2/31 | 10.2.85.2 – 10.2.85.3 | 10.2.85.3 |
| 3 | 10.2.85.4/31 | 10.2.85.4 – 10.2.85.5 | 10.2.85.5 |
| 4 | 10.2.85.6/31 | 10.2.85.6 – 10.2.85.7 | 10.2.85.7 |
| 5 | 10.2.85.8/31 | 10.2.85.8 – 10.2.85.9 | 10.2.85.9 |
| 6 | 10.2.85.10/31 | 10.2.85.10 – 10.2.85.11 | 10.2.85.11 |
| 7 | 10.2.85.12/31 | 10.2.85.12 – 10.2.85.13 | 10.2.85.13 |
| 8 | 10.2.85.14/31 | 10.2.85.14 – 10.2.85.15 | 10.2.85.15 |
| 9 | 10.2.85.16/31 | 10.2.85.16 – 10.2.85.17 | 10.2.85.17 |
| 10 | 10.2.85.18/31 | 10.2.85.18 – 10.2.85.19 | 10.2.85.19 |
| 11 | 10.2.85.20/31 | 10.2.85.20 – 10.2.85.21 | 10.2.85.21 |
| 12 | 10.2.85.22/31 | 10.2.85.22 – 10.2.85.23 | 10.2.85.23 |
| 13 | 10.2.85.24/31 | 10.2.85.24 – 10.2.85.25 | 10.2.85.25 |
| 14 | 10.2.85.26/31 | 10.2.85.26 – 10.2.85.27 | 10.2.85.27 |
| 15 | 10.2.85.28/31 | 10.2.85.28 – 10.2.85.29 | 10.2.85.29 |
| 16 | 10.2.85.30/31 | 10.2.85.30 – 10.2.85.31 | 10.2.85.31 |
| 17 | 10.2.85.32/31 | 10.2.85.32 – 10.2.85.33 | 10.2.85.33 |
| 18 | 10.2.85.34/31 | 10.2.85.34 – 10.2.85.35 | 10.2.85.35 |
| 19 | 10.2.85.36/31 | 10.2.85.36 – 10.2.85.37 | 10.2.85.37 |
| 20 | 10.2.85.38/31 | 10.2.85.38 – 10.2.85.39 | 10.2.85.39 |
| 21 | 10.2.85.40/31 | 10.2.85.40 – 10.2.85.41 | 10.2.85.41 |
| 22 | 10.2.85.42/31 | 10.2.85.42 – 10.2.85.43 | 10.2.85.43 |
| 23 | 10.2.85.44/31 | 10.2.85.44 – 10.2.85.45 | 10.2.85.45 |
| 24 | 10.2.85.46/31 | 10.2.85.46 – 10.2.85.47 | 10.2.85.47 |
| 25 | 10.2.85.48/31 | 10.2.85.48 – 10.2.85.49 | 10.2.85.49 |
| 26 | 10.2.85.50/31 | 10.2.85.50 – 10.2.85.51 | 10.2.85.51 |
| 27 | 10.2.85.52/31 | 10.2.85.52 – 10.2.85.53 | 10.2.85.53 |
| 28 | 10.2.85.54/31 | 10.2.85.54 – 10.2.85.55 | 10.2.85.55 |
| 29 | 10.2.85.56/31 | 10.2.85.56 – 10.2.85.57 | 10.2.85.57 |
| 30 | 10.2.85.58/31 | 10.2.85.58 – 10.2.85.59 | 10.2.85.59 |
| 31 | 10.2.85.60/31 | 10.2.85.60 – 10.2.85.61 | 10.2.85.61 |
| 32 | 10.2.85.62/31 | 10.2.85.62 – 10.2.85.63 | 10.2.85.63 |
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.