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)10.80.0.0/13
network10.80.0.0/13
broadcast10.87.255.255
first host10.80.0.1
last host10.87.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.80.0.0/13
address00001010.01010000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.01010000.00000000.00000000
broadcast00001010.01010111.11111111.11111111
green = network part, grey = host part
hex0x0a500000
decimal173015040
reverse dns0.0.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.80.0.0/20 | 10.80.0.1 – 10.80.15.254 | 10.80.15.255 |
| 2 | 10.80.16.0/20 | 10.80.16.1 – 10.80.31.254 | 10.80.31.255 |
| 3 | 10.80.32.0/20 | 10.80.32.1 – 10.80.47.254 | 10.80.47.255 |
| 4 | 10.80.48.0/20 | 10.80.48.1 – 10.80.63.254 | 10.80.63.255 |
| 5 | 10.80.64.0/20 | 10.80.64.1 – 10.80.79.254 | 10.80.79.255 |
| 6 | 10.80.80.0/20 | 10.80.80.1 – 10.80.95.254 | 10.80.95.255 |
| 7 | 10.80.96.0/20 | 10.80.96.1 – 10.80.111.254 | 10.80.111.255 |
| 8 | 10.80.112.0/20 | 10.80.112.1 – 10.80.127.254 | 10.80.127.255 |
| 9 | 10.80.128.0/20 | 10.80.128.1 – 10.80.143.254 | 10.80.143.255 |
| 10 | 10.80.144.0/20 | 10.80.144.1 – 10.80.159.254 | 10.80.159.255 |
| 11 | 10.80.160.0/20 | 10.80.160.1 – 10.80.175.254 | 10.80.175.255 |
| 12 | 10.80.176.0/20 | 10.80.176.1 – 10.80.191.254 | 10.80.191.255 |
| 13 | 10.80.192.0/20 | 10.80.192.1 – 10.80.207.254 | 10.80.207.255 |
| 14 | 10.80.208.0/20 | 10.80.208.1 – 10.80.223.254 | 10.80.223.255 |
| 15 | 10.80.224.0/20 | 10.80.224.1 – 10.80.239.254 | 10.80.239.255 |
| 16 | 10.80.240.0/20 | 10.80.240.1 – 10.80.255.254 | 10.80.255.255 |
| 17 | 10.81.0.0/20 | 10.81.0.1 – 10.81.15.254 | 10.81.15.255 |
| 18 | 10.81.16.0/20 | 10.81.16.1 – 10.81.31.254 | 10.81.31.255 |
| 19 | 10.81.32.0/20 | 10.81.32.1 – 10.81.47.254 | 10.81.47.255 |
| 20 | 10.81.48.0/20 | 10.81.48.1 – 10.81.63.254 | 10.81.63.255 |
| 21 | 10.81.64.0/20 | 10.81.64.1 – 10.81.79.254 | 10.81.79.255 |
| 22 | 10.81.80.0/20 | 10.81.80.1 – 10.81.95.254 | 10.81.95.255 |
| 23 | 10.81.96.0/20 | 10.81.96.1 – 10.81.111.254 | 10.81.111.255 |
| 24 | 10.81.112.0/20 | 10.81.112.1 – 10.81.127.254 | 10.81.127.255 |
| 25 | 10.81.128.0/20 | 10.81.128.1 – 10.81.143.254 | 10.81.143.255 |
| 26 | 10.81.144.0/20 | 10.81.144.1 – 10.81.159.254 | 10.81.159.255 |
| 27 | 10.81.160.0/20 | 10.81.160.1 – 10.81.175.254 | 10.81.175.255 |
| 28 | 10.81.176.0/20 | 10.81.176.1 – 10.81.191.254 | 10.81.191.255 |
| 29 | 10.81.192.0/20 | 10.81.192.1 – 10.81.207.254 | 10.81.207.255 |
| 30 | 10.81.208.0/20 | 10.81.208.1 – 10.81.223.254 | 10.81.223.255 |
| 31 | 10.81.224.0/20 | 10.81.224.1 – 10.81.239.254 | 10.81.239.255 |
| 32 | 10.81.240.0/20 | 10.81.240.1 – 10.81.255.254 | 10.81.255.255 |
| 33 | 10.82.0.0/20 | 10.82.0.1 – 10.82.15.254 | 10.82.15.255 |
| 34 | 10.82.16.0/20 | 10.82.16.1 – 10.82.31.254 | 10.82.31.255 |
| 35 | 10.82.32.0/20 | 10.82.32.1 – 10.82.47.254 | 10.82.47.255 |
| 36 | 10.82.48.0/20 | 10.82.48.1 – 10.82.63.254 | 10.82.63.255 |
| 37 | 10.82.64.0/20 | 10.82.64.1 – 10.82.79.254 | 10.82.79.255 |
| 38 | 10.82.80.0/20 | 10.82.80.1 – 10.82.95.254 | 10.82.95.255 |
| 39 | 10.82.96.0/20 | 10.82.96.1 – 10.82.111.254 | 10.82.111.255 |
| 40 | 10.82.112.0/20 | 10.82.112.1 – 10.82.127.254 | 10.82.127.255 |
| 41 | 10.82.128.0/20 | 10.82.128.1 – 10.82.143.254 | 10.82.143.255 |
| 42 | 10.82.144.0/20 | 10.82.144.1 – 10.82.159.254 | 10.82.159.255 |
| 43 | 10.82.160.0/20 | 10.82.160.1 – 10.82.175.254 | 10.82.175.255 |
| 44 | 10.82.176.0/20 | 10.82.176.1 – 10.82.191.254 | 10.82.191.255 |
| 45 | 10.82.192.0/20 | 10.82.192.1 – 10.82.207.254 | 10.82.207.255 |
| 46 | 10.82.208.0/20 | 10.82.208.1 – 10.82.223.254 | 10.82.223.255 |
| 47 | 10.82.224.0/20 | 10.82.224.1 – 10.82.239.254 | 10.82.239.255 |
| 48 | 10.82.240.0/20 | 10.82.240.1 – 10.82.255.254 | 10.82.255.255 |
| 49 | 10.83.0.0/20 | 10.83.0.1 – 10.83.15.254 | 10.83.15.255 |
| 50 | 10.83.16.0/20 | 10.83.16.1 – 10.83.31.254 | 10.83.31.255 |
| 51 | 10.83.32.0/20 | 10.83.32.1 – 10.83.47.254 | 10.83.47.255 |
| 52 | 10.83.48.0/20 | 10.83.48.1 – 10.83.63.254 | 10.83.63.255 |
| 53 | 10.83.64.0/20 | 10.83.64.1 – 10.83.79.254 | 10.83.79.255 |
| 54 | 10.83.80.0/20 | 10.83.80.1 – 10.83.95.254 | 10.83.95.255 |
| 55 | 10.83.96.0/20 | 10.83.96.1 – 10.83.111.254 | 10.83.111.255 |
| 56 | 10.83.112.0/20 | 10.83.112.1 – 10.83.127.254 | 10.83.127.255 |
| 57 | 10.83.128.0/20 | 10.83.128.1 – 10.83.143.254 | 10.83.143.255 |
| 58 | 10.83.144.0/20 | 10.83.144.1 – 10.83.159.254 | 10.83.159.255 |
| 59 | 10.83.160.0/20 | 10.83.160.1 – 10.83.175.254 | 10.83.175.255 |
| 60 | 10.83.176.0/20 | 10.83.176.1 – 10.83.191.254 | 10.83.191.255 |
| 61 | 10.83.192.0/20 | 10.83.192.1 – 10.83.207.254 | 10.83.207.255 |
| 62 | 10.83.208.0/20 | 10.83.208.1 – 10.83.223.254 | 10.83.223.255 |
| 63 | 10.83.224.0/20 | 10.83.224.1 – 10.83.239.254 | 10.83.239.255 |
| 64 | 10.83.240.0/20 | 10.83.240.1 – 10.83.255.254 | 10.83.255.255 |
| 65 | 10.84.0.0/20 | 10.84.0.1 – 10.84.15.254 | 10.84.15.255 |
| 66 | 10.84.16.0/20 | 10.84.16.1 – 10.84.31.254 | 10.84.31.255 |
| 67 | 10.84.32.0/20 | 10.84.32.1 – 10.84.47.254 | 10.84.47.255 |
| 68 | 10.84.48.0/20 | 10.84.48.1 – 10.84.63.254 | 10.84.63.255 |
| 69 | 10.84.64.0/20 | 10.84.64.1 – 10.84.79.254 | 10.84.79.255 |
| 70 | 10.84.80.0/20 | 10.84.80.1 – 10.84.95.254 | 10.84.95.255 |
| 71 | 10.84.96.0/20 | 10.84.96.1 – 10.84.111.254 | 10.84.111.255 |
| 72 | 10.84.112.0/20 | 10.84.112.1 – 10.84.127.254 | 10.84.127.255 |
| 73 | 10.84.128.0/20 | 10.84.128.1 – 10.84.143.254 | 10.84.143.255 |
| 74 | 10.84.144.0/20 | 10.84.144.1 – 10.84.159.254 | 10.84.159.255 |
| 75 | 10.84.160.0/20 | 10.84.160.1 – 10.84.175.254 | 10.84.175.255 |
| 76 | 10.84.176.0/20 | 10.84.176.1 – 10.84.191.254 | 10.84.191.255 |
| 77 | 10.84.192.0/20 | 10.84.192.1 – 10.84.207.254 | 10.84.207.255 |
| 78 | 10.84.208.0/20 | 10.84.208.1 – 10.84.223.254 | 10.84.223.255 |
| 79 | 10.84.224.0/20 | 10.84.224.1 – 10.84.239.254 | 10.84.239.255 |
| 80 | 10.84.240.0/20 | 10.84.240.1 – 10.84.255.254 | 10.84.255.255 |
| 81 | 10.85.0.0/20 | 10.85.0.1 – 10.85.15.254 | 10.85.15.255 |
| 82 | 10.85.16.0/20 | 10.85.16.1 – 10.85.31.254 | 10.85.31.255 |
| 83 | 10.85.32.0/20 | 10.85.32.1 – 10.85.47.254 | 10.85.47.255 |
| 84 | 10.85.48.0/20 | 10.85.48.1 – 10.85.63.254 | 10.85.63.255 |
| 85 | 10.85.64.0/20 | 10.85.64.1 – 10.85.79.254 | 10.85.79.255 |
| 86 | 10.85.80.0/20 | 10.85.80.1 – 10.85.95.254 | 10.85.95.255 |
| 87 | 10.85.96.0/20 | 10.85.96.1 – 10.85.111.254 | 10.85.111.255 |
| 88 | 10.85.112.0/20 | 10.85.112.1 – 10.85.127.254 | 10.85.127.255 |
| 89 | 10.85.128.0/20 | 10.85.128.1 – 10.85.143.254 | 10.85.143.255 |
| 90 | 10.85.144.0/20 | 10.85.144.1 – 10.85.159.254 | 10.85.159.255 |
| 91 | 10.85.160.0/20 | 10.85.160.1 – 10.85.175.254 | 10.85.175.255 |
| 92 | 10.85.176.0/20 | 10.85.176.1 – 10.85.191.254 | 10.85.191.255 |
| 93 | 10.85.192.0/20 | 10.85.192.1 – 10.85.207.254 | 10.85.207.255 |
| 94 | 10.85.208.0/20 | 10.85.208.1 – 10.85.223.254 | 10.85.223.255 |
| 95 | 10.85.224.0/20 | 10.85.224.1 – 10.85.239.254 | 10.85.239.255 |
| 96 | 10.85.240.0/20 | 10.85.240.1 – 10.85.255.254 | 10.85.255.255 |
| 97 | 10.86.0.0/20 | 10.86.0.1 – 10.86.15.254 | 10.86.15.255 |
| 98 | 10.86.16.0/20 | 10.86.16.1 – 10.86.31.254 | 10.86.31.255 |
| 99 | 10.86.32.0/20 | 10.86.32.1 – 10.86.47.254 | 10.86.47.255 |
| 100 | 10.86.48.0/20 | 10.86.48.1 – 10.86.63.254 | 10.86.63.255 |
| 101 | 10.86.64.0/20 | 10.86.64.1 – 10.86.79.254 | 10.86.79.255 |
| 102 | 10.86.80.0/20 | 10.86.80.1 – 10.86.95.254 | 10.86.95.255 |
| 103 | 10.86.96.0/20 | 10.86.96.1 – 10.86.111.254 | 10.86.111.255 |
| 104 | 10.86.112.0/20 | 10.86.112.1 – 10.86.127.254 | 10.86.127.255 |
| 105 | 10.86.128.0/20 | 10.86.128.1 – 10.86.143.254 | 10.86.143.255 |
| 106 | 10.86.144.0/20 | 10.86.144.1 – 10.86.159.254 | 10.86.159.255 |
| 107 | 10.86.160.0/20 | 10.86.160.1 – 10.86.175.254 | 10.86.175.255 |
| 108 | 10.86.176.0/20 | 10.86.176.1 – 10.86.191.254 | 10.86.191.255 |
| 109 | 10.86.192.0/20 | 10.86.192.1 – 10.86.207.254 | 10.86.207.255 |
| 110 | 10.86.208.0/20 | 10.86.208.1 – 10.86.223.254 | 10.86.223.255 |
| 111 | 10.86.224.0/20 | 10.86.224.1 – 10.86.239.254 | 10.86.239.255 |
| 112 | 10.86.240.0/20 | 10.86.240.1 – 10.86.255.254 | 10.86.255.255 |
| 113 | 10.87.0.0/20 | 10.87.0.1 – 10.87.15.254 | 10.87.15.255 |
| 114 | 10.87.16.0/20 | 10.87.16.1 – 10.87.31.254 | 10.87.31.255 |
| 115 | 10.87.32.0/20 | 10.87.32.1 – 10.87.47.254 | 10.87.47.255 |
| 116 | 10.87.48.0/20 | 10.87.48.1 – 10.87.63.254 | 10.87.63.255 |
| 117 | 10.87.64.0/20 | 10.87.64.1 – 10.87.79.254 | 10.87.79.255 |
| 118 | 10.87.80.0/20 | 10.87.80.1 – 10.87.95.254 | 10.87.95.255 |
| 119 | 10.87.96.0/20 | 10.87.96.1 – 10.87.111.254 | 10.87.111.255 |
| 120 | 10.87.112.0/20 | 10.87.112.1 – 10.87.127.254 | 10.87.127.255 |
| 121 | 10.87.128.0/20 | 10.87.128.1 – 10.87.143.254 | 10.87.143.255 |
| 122 | 10.87.144.0/20 | 10.87.144.1 – 10.87.159.254 | 10.87.159.255 |
| 123 | 10.87.160.0/20 | 10.87.160.1 – 10.87.175.254 | 10.87.175.255 |
| 124 | 10.87.176.0/20 | 10.87.176.1 – 10.87.191.254 | 10.87.191.255 |
| 125 | 10.87.192.0/20 | 10.87.192.1 – 10.87.207.254 | 10.87.207.255 |
| 126 | 10.87.208.0/20 | 10.87.208.1 – 10.87.223.254 | 10.87.223.255 |
| 127 | 10.87.224.0/20 | 10.87.224.1 – 10.87.239.254 | 10.87.239.255 |
| 128 | 10.87.240.0/20 | 10.87.240.1 – 10.87.255.254 | 10.87.255.255 |
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 /13 |
|---|---|---|---|---|
| /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 | 1 |
| /14 | 255.252.0.0 | 262,144 | 262,142 | 2 split → |
| /15 | 255.254.0.0 | 131,072 | 131,070 | 4 split → |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 8 split → |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 16 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 32 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 64 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 128 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 256 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 512 split → |
| /23 | 255.255.254.0 | 512 | 510 | 1,024 split → |
| /24 | 255.255.255.0 | 256 | 254 | 2,048 split → |
| /25 | 255.255.255.128 | 128 | 126 | 4,096 split → |
| /26 | 255.255.255.192 | 64 | 62 | 8,192 split → |
| /27 | 255.255.255.224 | 32 | 30 | 16,384 split → |
| /28 | 255.255.255.240 | 16 | 14 | 32,768 split → |
| /29 | 255.255.255.248 | 8 | 6 | 65,536 split → |
| /30 | 255.255.255.252 | 4 | 2 | 131,072 split → |
| /31 | 255.255.255.254 | 2 | 2 | 262,144 split → |
| /32 | 255.255.255.255 | 1 | 1 | 524,288 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.