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)10.8.0.0/13
network10.8.0.0/13
broadcast10.15.255.255
first host10.8.0.1
last host10.15.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.8.0.0/13
address00001010.00001000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00001000.00000000.00000000
broadcast00001010.00001111.11111111.11111111
green = network part, grey = host part
hex0x0a080000
decimal168296448
reverse dns0.0.8.10.in-addr.arpa
ipv4-mapped::ffff:a08:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.8.0.0/20 | 10.8.0.1 – 10.8.15.254 | 10.8.15.255 |
| 2 | 10.8.16.0/20 | 10.8.16.1 – 10.8.31.254 | 10.8.31.255 |
| 3 | 10.8.32.0/20 | 10.8.32.1 – 10.8.47.254 | 10.8.47.255 |
| 4 | 10.8.48.0/20 | 10.8.48.1 – 10.8.63.254 | 10.8.63.255 |
| 5 | 10.8.64.0/20 | 10.8.64.1 – 10.8.79.254 | 10.8.79.255 |
| 6 | 10.8.80.0/20 | 10.8.80.1 – 10.8.95.254 | 10.8.95.255 |
| 7 | 10.8.96.0/20 | 10.8.96.1 – 10.8.111.254 | 10.8.111.255 |
| 8 | 10.8.112.0/20 | 10.8.112.1 – 10.8.127.254 | 10.8.127.255 |
| 9 | 10.8.128.0/20 | 10.8.128.1 – 10.8.143.254 | 10.8.143.255 |
| 10 | 10.8.144.0/20 | 10.8.144.1 – 10.8.159.254 | 10.8.159.255 |
| 11 | 10.8.160.0/20 | 10.8.160.1 – 10.8.175.254 | 10.8.175.255 |
| 12 | 10.8.176.0/20 | 10.8.176.1 – 10.8.191.254 | 10.8.191.255 |
| 13 | 10.8.192.0/20 | 10.8.192.1 – 10.8.207.254 | 10.8.207.255 |
| 14 | 10.8.208.0/20 | 10.8.208.1 – 10.8.223.254 | 10.8.223.255 |
| 15 | 10.8.224.0/20 | 10.8.224.1 – 10.8.239.254 | 10.8.239.255 |
| 16 | 10.8.240.0/20 | 10.8.240.1 – 10.8.255.254 | 10.8.255.255 |
| 17 | 10.9.0.0/20 | 10.9.0.1 – 10.9.15.254 | 10.9.15.255 |
| 18 | 10.9.16.0/20 | 10.9.16.1 – 10.9.31.254 | 10.9.31.255 |
| 19 | 10.9.32.0/20 | 10.9.32.1 – 10.9.47.254 | 10.9.47.255 |
| 20 | 10.9.48.0/20 | 10.9.48.1 – 10.9.63.254 | 10.9.63.255 |
| 21 | 10.9.64.0/20 | 10.9.64.1 – 10.9.79.254 | 10.9.79.255 |
| 22 | 10.9.80.0/20 | 10.9.80.1 – 10.9.95.254 | 10.9.95.255 |
| 23 | 10.9.96.0/20 | 10.9.96.1 – 10.9.111.254 | 10.9.111.255 |
| 24 | 10.9.112.0/20 | 10.9.112.1 – 10.9.127.254 | 10.9.127.255 |
| 25 | 10.9.128.0/20 | 10.9.128.1 – 10.9.143.254 | 10.9.143.255 |
| 26 | 10.9.144.0/20 | 10.9.144.1 – 10.9.159.254 | 10.9.159.255 |
| 27 | 10.9.160.0/20 | 10.9.160.1 – 10.9.175.254 | 10.9.175.255 |
| 28 | 10.9.176.0/20 | 10.9.176.1 – 10.9.191.254 | 10.9.191.255 |
| 29 | 10.9.192.0/20 | 10.9.192.1 – 10.9.207.254 | 10.9.207.255 |
| 30 | 10.9.208.0/20 | 10.9.208.1 – 10.9.223.254 | 10.9.223.255 |
| 31 | 10.9.224.0/20 | 10.9.224.1 – 10.9.239.254 | 10.9.239.255 |
| 32 | 10.9.240.0/20 | 10.9.240.1 – 10.9.255.254 | 10.9.255.255 |
| 33 | 10.10.0.0/20 | 10.10.0.1 – 10.10.15.254 | 10.10.15.255 |
| 34 | 10.10.16.0/20 | 10.10.16.1 – 10.10.31.254 | 10.10.31.255 |
| 35 | 10.10.32.0/20 | 10.10.32.1 – 10.10.47.254 | 10.10.47.255 |
| 36 | 10.10.48.0/20 | 10.10.48.1 – 10.10.63.254 | 10.10.63.255 |
| 37 | 10.10.64.0/20 | 10.10.64.1 – 10.10.79.254 | 10.10.79.255 |
| 38 | 10.10.80.0/20 | 10.10.80.1 – 10.10.95.254 | 10.10.95.255 |
| 39 | 10.10.96.0/20 | 10.10.96.1 – 10.10.111.254 | 10.10.111.255 |
| 40 | 10.10.112.0/20 | 10.10.112.1 – 10.10.127.254 | 10.10.127.255 |
| 41 | 10.10.128.0/20 | 10.10.128.1 – 10.10.143.254 | 10.10.143.255 |
| 42 | 10.10.144.0/20 | 10.10.144.1 – 10.10.159.254 | 10.10.159.255 |
| 43 | 10.10.160.0/20 | 10.10.160.1 – 10.10.175.254 | 10.10.175.255 |
| 44 | 10.10.176.0/20 | 10.10.176.1 – 10.10.191.254 | 10.10.191.255 |
| 45 | 10.10.192.0/20 | 10.10.192.1 – 10.10.207.254 | 10.10.207.255 |
| 46 | 10.10.208.0/20 | 10.10.208.1 – 10.10.223.254 | 10.10.223.255 |
| 47 | 10.10.224.0/20 | 10.10.224.1 – 10.10.239.254 | 10.10.239.255 |
| 48 | 10.10.240.0/20 | 10.10.240.1 – 10.10.255.254 | 10.10.255.255 |
| 49 | 10.11.0.0/20 | 10.11.0.1 – 10.11.15.254 | 10.11.15.255 |
| 50 | 10.11.16.0/20 | 10.11.16.1 – 10.11.31.254 | 10.11.31.255 |
| 51 | 10.11.32.0/20 | 10.11.32.1 – 10.11.47.254 | 10.11.47.255 |
| 52 | 10.11.48.0/20 | 10.11.48.1 – 10.11.63.254 | 10.11.63.255 |
| 53 | 10.11.64.0/20 | 10.11.64.1 – 10.11.79.254 | 10.11.79.255 |
| 54 | 10.11.80.0/20 | 10.11.80.1 – 10.11.95.254 | 10.11.95.255 |
| 55 | 10.11.96.0/20 | 10.11.96.1 – 10.11.111.254 | 10.11.111.255 |
| 56 | 10.11.112.0/20 | 10.11.112.1 – 10.11.127.254 | 10.11.127.255 |
| 57 | 10.11.128.0/20 | 10.11.128.1 – 10.11.143.254 | 10.11.143.255 |
| 58 | 10.11.144.0/20 | 10.11.144.1 – 10.11.159.254 | 10.11.159.255 |
| 59 | 10.11.160.0/20 | 10.11.160.1 – 10.11.175.254 | 10.11.175.255 |
| 60 | 10.11.176.0/20 | 10.11.176.1 – 10.11.191.254 | 10.11.191.255 |
| 61 | 10.11.192.0/20 | 10.11.192.1 – 10.11.207.254 | 10.11.207.255 |
| 62 | 10.11.208.0/20 | 10.11.208.1 – 10.11.223.254 | 10.11.223.255 |
| 63 | 10.11.224.0/20 | 10.11.224.1 – 10.11.239.254 | 10.11.239.255 |
| 64 | 10.11.240.0/20 | 10.11.240.1 – 10.11.255.254 | 10.11.255.255 |
| 65 | 10.12.0.0/20 | 10.12.0.1 – 10.12.15.254 | 10.12.15.255 |
| 66 | 10.12.16.0/20 | 10.12.16.1 – 10.12.31.254 | 10.12.31.255 |
| 67 | 10.12.32.0/20 | 10.12.32.1 – 10.12.47.254 | 10.12.47.255 |
| 68 | 10.12.48.0/20 | 10.12.48.1 – 10.12.63.254 | 10.12.63.255 |
| 69 | 10.12.64.0/20 | 10.12.64.1 – 10.12.79.254 | 10.12.79.255 |
| 70 | 10.12.80.0/20 | 10.12.80.1 – 10.12.95.254 | 10.12.95.255 |
| 71 | 10.12.96.0/20 | 10.12.96.1 – 10.12.111.254 | 10.12.111.255 |
| 72 | 10.12.112.0/20 | 10.12.112.1 – 10.12.127.254 | 10.12.127.255 |
| 73 | 10.12.128.0/20 | 10.12.128.1 – 10.12.143.254 | 10.12.143.255 |
| 74 | 10.12.144.0/20 | 10.12.144.1 – 10.12.159.254 | 10.12.159.255 |
| 75 | 10.12.160.0/20 | 10.12.160.1 – 10.12.175.254 | 10.12.175.255 |
| 76 | 10.12.176.0/20 | 10.12.176.1 – 10.12.191.254 | 10.12.191.255 |
| 77 | 10.12.192.0/20 | 10.12.192.1 – 10.12.207.254 | 10.12.207.255 |
| 78 | 10.12.208.0/20 | 10.12.208.1 – 10.12.223.254 | 10.12.223.255 |
| 79 | 10.12.224.0/20 | 10.12.224.1 – 10.12.239.254 | 10.12.239.255 |
| 80 | 10.12.240.0/20 | 10.12.240.1 – 10.12.255.254 | 10.12.255.255 |
| 81 | 10.13.0.0/20 | 10.13.0.1 – 10.13.15.254 | 10.13.15.255 |
| 82 | 10.13.16.0/20 | 10.13.16.1 – 10.13.31.254 | 10.13.31.255 |
| 83 | 10.13.32.0/20 | 10.13.32.1 – 10.13.47.254 | 10.13.47.255 |
| 84 | 10.13.48.0/20 | 10.13.48.1 – 10.13.63.254 | 10.13.63.255 |
| 85 | 10.13.64.0/20 | 10.13.64.1 – 10.13.79.254 | 10.13.79.255 |
| 86 | 10.13.80.0/20 | 10.13.80.1 – 10.13.95.254 | 10.13.95.255 |
| 87 | 10.13.96.0/20 | 10.13.96.1 – 10.13.111.254 | 10.13.111.255 |
| 88 | 10.13.112.0/20 | 10.13.112.1 – 10.13.127.254 | 10.13.127.255 |
| 89 | 10.13.128.0/20 | 10.13.128.1 – 10.13.143.254 | 10.13.143.255 |
| 90 | 10.13.144.0/20 | 10.13.144.1 – 10.13.159.254 | 10.13.159.255 |
| 91 | 10.13.160.0/20 | 10.13.160.1 – 10.13.175.254 | 10.13.175.255 |
| 92 | 10.13.176.0/20 | 10.13.176.1 – 10.13.191.254 | 10.13.191.255 |
| 93 | 10.13.192.0/20 | 10.13.192.1 – 10.13.207.254 | 10.13.207.255 |
| 94 | 10.13.208.0/20 | 10.13.208.1 – 10.13.223.254 | 10.13.223.255 |
| 95 | 10.13.224.0/20 | 10.13.224.1 – 10.13.239.254 | 10.13.239.255 |
| 96 | 10.13.240.0/20 | 10.13.240.1 – 10.13.255.254 | 10.13.255.255 |
| 97 | 10.14.0.0/20 | 10.14.0.1 – 10.14.15.254 | 10.14.15.255 |
| 98 | 10.14.16.0/20 | 10.14.16.1 – 10.14.31.254 | 10.14.31.255 |
| 99 | 10.14.32.0/20 | 10.14.32.1 – 10.14.47.254 | 10.14.47.255 |
| 100 | 10.14.48.0/20 | 10.14.48.1 – 10.14.63.254 | 10.14.63.255 |
| 101 | 10.14.64.0/20 | 10.14.64.1 – 10.14.79.254 | 10.14.79.255 |
| 102 | 10.14.80.0/20 | 10.14.80.1 – 10.14.95.254 | 10.14.95.255 |
| 103 | 10.14.96.0/20 | 10.14.96.1 – 10.14.111.254 | 10.14.111.255 |
| 104 | 10.14.112.0/20 | 10.14.112.1 – 10.14.127.254 | 10.14.127.255 |
| 105 | 10.14.128.0/20 | 10.14.128.1 – 10.14.143.254 | 10.14.143.255 |
| 106 | 10.14.144.0/20 | 10.14.144.1 – 10.14.159.254 | 10.14.159.255 |
| 107 | 10.14.160.0/20 | 10.14.160.1 – 10.14.175.254 | 10.14.175.255 |
| 108 | 10.14.176.0/20 | 10.14.176.1 – 10.14.191.254 | 10.14.191.255 |
| 109 | 10.14.192.0/20 | 10.14.192.1 – 10.14.207.254 | 10.14.207.255 |
| 110 | 10.14.208.0/20 | 10.14.208.1 – 10.14.223.254 | 10.14.223.255 |
| 111 | 10.14.224.0/20 | 10.14.224.1 – 10.14.239.254 | 10.14.239.255 |
| 112 | 10.14.240.0/20 | 10.14.240.1 – 10.14.255.254 | 10.14.255.255 |
| 113 | 10.15.0.0/20 | 10.15.0.1 – 10.15.15.254 | 10.15.15.255 |
| 114 | 10.15.16.0/20 | 10.15.16.1 – 10.15.31.254 | 10.15.31.255 |
| 115 | 10.15.32.0/20 | 10.15.32.1 – 10.15.47.254 | 10.15.47.255 |
| 116 | 10.15.48.0/20 | 10.15.48.1 – 10.15.63.254 | 10.15.63.255 |
| 117 | 10.15.64.0/20 | 10.15.64.1 – 10.15.79.254 | 10.15.79.255 |
| 118 | 10.15.80.0/20 | 10.15.80.1 – 10.15.95.254 | 10.15.95.255 |
| 119 | 10.15.96.0/20 | 10.15.96.1 – 10.15.111.254 | 10.15.111.255 |
| 120 | 10.15.112.0/20 | 10.15.112.1 – 10.15.127.254 | 10.15.127.255 |
| 121 | 10.15.128.0/20 | 10.15.128.1 – 10.15.143.254 | 10.15.143.255 |
| 122 | 10.15.144.0/20 | 10.15.144.1 – 10.15.159.254 | 10.15.159.255 |
| 123 | 10.15.160.0/20 | 10.15.160.1 – 10.15.175.254 | 10.15.175.255 |
| 124 | 10.15.176.0/20 | 10.15.176.1 – 10.15.191.254 | 10.15.191.255 |
| 125 | 10.15.192.0/20 | 10.15.192.1 – 10.15.207.254 | 10.15.207.255 |
| 126 | 10.15.208.0/20 | 10.15.208.1 – 10.15.223.254 | 10.15.223.255 |
| 127 | 10.15.224.0/20 | 10.15.224.1 – 10.15.239.254 | 10.15.239.255 |
| 128 | 10.15.240.0/20 | 10.15.240.1 – 10.15.255.254 | 10.15.255.255 |
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.