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)10.0.0.0/13
network10.0.0.0/13
broadcast10.7.255.255
first host10.0.0.1
last host10.7.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.0.0.0/13
address00001010.00000000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00000000.00000000.00000000
broadcast00001010.00000111.11111111.11111111
green = network part, grey = host part
hex0x0a000000
decimal167772160
reverse dns0.0.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.0.0.0/20 | 10.0.0.1 – 10.0.15.254 | 10.0.15.255 |
| 2 | 10.0.16.0/20 | 10.0.16.1 – 10.0.31.254 | 10.0.31.255 |
| 3 | 10.0.32.0/20 | 10.0.32.1 – 10.0.47.254 | 10.0.47.255 |
| 4 | 10.0.48.0/20 | 10.0.48.1 – 10.0.63.254 | 10.0.63.255 |
| 5 | 10.0.64.0/20 | 10.0.64.1 – 10.0.79.254 | 10.0.79.255 |
| 6 | 10.0.80.0/20 | 10.0.80.1 – 10.0.95.254 | 10.0.95.255 |
| 7 | 10.0.96.0/20 | 10.0.96.1 – 10.0.111.254 | 10.0.111.255 |
| 8 | 10.0.112.0/20 | 10.0.112.1 – 10.0.127.254 | 10.0.127.255 |
| 9 | 10.0.128.0/20 | 10.0.128.1 – 10.0.143.254 | 10.0.143.255 |
| 10 | 10.0.144.0/20 | 10.0.144.1 – 10.0.159.254 | 10.0.159.255 |
| 11 | 10.0.160.0/20 | 10.0.160.1 – 10.0.175.254 | 10.0.175.255 |
| 12 | 10.0.176.0/20 | 10.0.176.1 – 10.0.191.254 | 10.0.191.255 |
| 13 | 10.0.192.0/20 | 10.0.192.1 – 10.0.207.254 | 10.0.207.255 |
| 14 | 10.0.208.0/20 | 10.0.208.1 – 10.0.223.254 | 10.0.223.255 |
| 15 | 10.0.224.0/20 | 10.0.224.1 – 10.0.239.254 | 10.0.239.255 |
| 16 | 10.0.240.0/20 | 10.0.240.1 – 10.0.255.254 | 10.0.255.255 |
| 17 | 10.1.0.0/20 | 10.1.0.1 – 10.1.15.254 | 10.1.15.255 |
| 18 | 10.1.16.0/20 | 10.1.16.1 – 10.1.31.254 | 10.1.31.255 |
| 19 | 10.1.32.0/20 | 10.1.32.1 – 10.1.47.254 | 10.1.47.255 |
| 20 | 10.1.48.0/20 | 10.1.48.1 – 10.1.63.254 | 10.1.63.255 |
| 21 | 10.1.64.0/20 | 10.1.64.1 – 10.1.79.254 | 10.1.79.255 |
| 22 | 10.1.80.0/20 | 10.1.80.1 – 10.1.95.254 | 10.1.95.255 |
| 23 | 10.1.96.0/20 | 10.1.96.1 – 10.1.111.254 | 10.1.111.255 |
| 24 | 10.1.112.0/20 | 10.1.112.1 – 10.1.127.254 | 10.1.127.255 |
| 25 | 10.1.128.0/20 | 10.1.128.1 – 10.1.143.254 | 10.1.143.255 |
| 26 | 10.1.144.0/20 | 10.1.144.1 – 10.1.159.254 | 10.1.159.255 |
| 27 | 10.1.160.0/20 | 10.1.160.1 – 10.1.175.254 | 10.1.175.255 |
| 28 | 10.1.176.0/20 | 10.1.176.1 – 10.1.191.254 | 10.1.191.255 |
| 29 | 10.1.192.0/20 | 10.1.192.1 – 10.1.207.254 | 10.1.207.255 |
| 30 | 10.1.208.0/20 | 10.1.208.1 – 10.1.223.254 | 10.1.223.255 |
| 31 | 10.1.224.0/20 | 10.1.224.1 – 10.1.239.254 | 10.1.239.255 |
| 32 | 10.1.240.0/20 | 10.1.240.1 – 10.1.255.254 | 10.1.255.255 |
| 33 | 10.2.0.0/20 | 10.2.0.1 – 10.2.15.254 | 10.2.15.255 |
| 34 | 10.2.16.0/20 | 10.2.16.1 – 10.2.31.254 | 10.2.31.255 |
| 35 | 10.2.32.0/20 | 10.2.32.1 – 10.2.47.254 | 10.2.47.255 |
| 36 | 10.2.48.0/20 | 10.2.48.1 – 10.2.63.254 | 10.2.63.255 |
| 37 | 10.2.64.0/20 | 10.2.64.1 – 10.2.79.254 | 10.2.79.255 |
| 38 | 10.2.80.0/20 | 10.2.80.1 – 10.2.95.254 | 10.2.95.255 |
| 39 | 10.2.96.0/20 | 10.2.96.1 – 10.2.111.254 | 10.2.111.255 |
| 40 | 10.2.112.0/20 | 10.2.112.1 – 10.2.127.254 | 10.2.127.255 |
| 41 | 10.2.128.0/20 | 10.2.128.1 – 10.2.143.254 | 10.2.143.255 |
| 42 | 10.2.144.0/20 | 10.2.144.1 – 10.2.159.254 | 10.2.159.255 |
| 43 | 10.2.160.0/20 | 10.2.160.1 – 10.2.175.254 | 10.2.175.255 |
| 44 | 10.2.176.0/20 | 10.2.176.1 – 10.2.191.254 | 10.2.191.255 |
| 45 | 10.2.192.0/20 | 10.2.192.1 – 10.2.207.254 | 10.2.207.255 |
| 46 | 10.2.208.0/20 | 10.2.208.1 – 10.2.223.254 | 10.2.223.255 |
| 47 | 10.2.224.0/20 | 10.2.224.1 – 10.2.239.254 | 10.2.239.255 |
| 48 | 10.2.240.0/20 | 10.2.240.1 – 10.2.255.254 | 10.2.255.255 |
| 49 | 10.3.0.0/20 | 10.3.0.1 – 10.3.15.254 | 10.3.15.255 |
| 50 | 10.3.16.0/20 | 10.3.16.1 – 10.3.31.254 | 10.3.31.255 |
| 51 | 10.3.32.0/20 | 10.3.32.1 – 10.3.47.254 | 10.3.47.255 |
| 52 | 10.3.48.0/20 | 10.3.48.1 – 10.3.63.254 | 10.3.63.255 |
| 53 | 10.3.64.0/20 | 10.3.64.1 – 10.3.79.254 | 10.3.79.255 |
| 54 | 10.3.80.0/20 | 10.3.80.1 – 10.3.95.254 | 10.3.95.255 |
| 55 | 10.3.96.0/20 | 10.3.96.1 – 10.3.111.254 | 10.3.111.255 |
| 56 | 10.3.112.0/20 | 10.3.112.1 – 10.3.127.254 | 10.3.127.255 |
| 57 | 10.3.128.0/20 | 10.3.128.1 – 10.3.143.254 | 10.3.143.255 |
| 58 | 10.3.144.0/20 | 10.3.144.1 – 10.3.159.254 | 10.3.159.255 |
| 59 | 10.3.160.0/20 | 10.3.160.1 – 10.3.175.254 | 10.3.175.255 |
| 60 | 10.3.176.0/20 | 10.3.176.1 – 10.3.191.254 | 10.3.191.255 |
| 61 | 10.3.192.0/20 | 10.3.192.1 – 10.3.207.254 | 10.3.207.255 |
| 62 | 10.3.208.0/20 | 10.3.208.1 – 10.3.223.254 | 10.3.223.255 |
| 63 | 10.3.224.0/20 | 10.3.224.1 – 10.3.239.254 | 10.3.239.255 |
| 64 | 10.3.240.0/20 | 10.3.240.1 – 10.3.255.254 | 10.3.255.255 |
| 65 | 10.4.0.0/20 | 10.4.0.1 – 10.4.15.254 | 10.4.15.255 |
| 66 | 10.4.16.0/20 | 10.4.16.1 – 10.4.31.254 | 10.4.31.255 |
| 67 | 10.4.32.0/20 | 10.4.32.1 – 10.4.47.254 | 10.4.47.255 |
| 68 | 10.4.48.0/20 | 10.4.48.1 – 10.4.63.254 | 10.4.63.255 |
| 69 | 10.4.64.0/20 | 10.4.64.1 – 10.4.79.254 | 10.4.79.255 |
| 70 | 10.4.80.0/20 | 10.4.80.1 – 10.4.95.254 | 10.4.95.255 |
| 71 | 10.4.96.0/20 | 10.4.96.1 – 10.4.111.254 | 10.4.111.255 |
| 72 | 10.4.112.0/20 | 10.4.112.1 – 10.4.127.254 | 10.4.127.255 |
| 73 | 10.4.128.0/20 | 10.4.128.1 – 10.4.143.254 | 10.4.143.255 |
| 74 | 10.4.144.0/20 | 10.4.144.1 – 10.4.159.254 | 10.4.159.255 |
| 75 | 10.4.160.0/20 | 10.4.160.1 – 10.4.175.254 | 10.4.175.255 |
| 76 | 10.4.176.0/20 | 10.4.176.1 – 10.4.191.254 | 10.4.191.255 |
| 77 | 10.4.192.0/20 | 10.4.192.1 – 10.4.207.254 | 10.4.207.255 |
| 78 | 10.4.208.0/20 | 10.4.208.1 – 10.4.223.254 | 10.4.223.255 |
| 79 | 10.4.224.0/20 | 10.4.224.1 – 10.4.239.254 | 10.4.239.255 |
| 80 | 10.4.240.0/20 | 10.4.240.1 – 10.4.255.254 | 10.4.255.255 |
| 81 | 10.5.0.0/20 | 10.5.0.1 – 10.5.15.254 | 10.5.15.255 |
| 82 | 10.5.16.0/20 | 10.5.16.1 – 10.5.31.254 | 10.5.31.255 |
| 83 | 10.5.32.0/20 | 10.5.32.1 – 10.5.47.254 | 10.5.47.255 |
| 84 | 10.5.48.0/20 | 10.5.48.1 – 10.5.63.254 | 10.5.63.255 |
| 85 | 10.5.64.0/20 | 10.5.64.1 – 10.5.79.254 | 10.5.79.255 |
| 86 | 10.5.80.0/20 | 10.5.80.1 – 10.5.95.254 | 10.5.95.255 |
| 87 | 10.5.96.0/20 | 10.5.96.1 – 10.5.111.254 | 10.5.111.255 |
| 88 | 10.5.112.0/20 | 10.5.112.1 – 10.5.127.254 | 10.5.127.255 |
| 89 | 10.5.128.0/20 | 10.5.128.1 – 10.5.143.254 | 10.5.143.255 |
| 90 | 10.5.144.0/20 | 10.5.144.1 – 10.5.159.254 | 10.5.159.255 |
| 91 | 10.5.160.0/20 | 10.5.160.1 – 10.5.175.254 | 10.5.175.255 |
| 92 | 10.5.176.0/20 | 10.5.176.1 – 10.5.191.254 | 10.5.191.255 |
| 93 | 10.5.192.0/20 | 10.5.192.1 – 10.5.207.254 | 10.5.207.255 |
| 94 | 10.5.208.0/20 | 10.5.208.1 – 10.5.223.254 | 10.5.223.255 |
| 95 | 10.5.224.0/20 | 10.5.224.1 – 10.5.239.254 | 10.5.239.255 |
| 96 | 10.5.240.0/20 | 10.5.240.1 – 10.5.255.254 | 10.5.255.255 |
| 97 | 10.6.0.0/20 | 10.6.0.1 – 10.6.15.254 | 10.6.15.255 |
| 98 | 10.6.16.0/20 | 10.6.16.1 – 10.6.31.254 | 10.6.31.255 |
| 99 | 10.6.32.0/20 | 10.6.32.1 – 10.6.47.254 | 10.6.47.255 |
| 100 | 10.6.48.0/20 | 10.6.48.1 – 10.6.63.254 | 10.6.63.255 |
| 101 | 10.6.64.0/20 | 10.6.64.1 – 10.6.79.254 | 10.6.79.255 |
| 102 | 10.6.80.0/20 | 10.6.80.1 – 10.6.95.254 | 10.6.95.255 |
| 103 | 10.6.96.0/20 | 10.6.96.1 – 10.6.111.254 | 10.6.111.255 |
| 104 | 10.6.112.0/20 | 10.6.112.1 – 10.6.127.254 | 10.6.127.255 |
| 105 | 10.6.128.0/20 | 10.6.128.1 – 10.6.143.254 | 10.6.143.255 |
| 106 | 10.6.144.0/20 | 10.6.144.1 – 10.6.159.254 | 10.6.159.255 |
| 107 | 10.6.160.0/20 | 10.6.160.1 – 10.6.175.254 | 10.6.175.255 |
| 108 | 10.6.176.0/20 | 10.6.176.1 – 10.6.191.254 | 10.6.191.255 |
| 109 | 10.6.192.0/20 | 10.6.192.1 – 10.6.207.254 | 10.6.207.255 |
| 110 | 10.6.208.0/20 | 10.6.208.1 – 10.6.223.254 | 10.6.223.255 |
| 111 | 10.6.224.0/20 | 10.6.224.1 – 10.6.239.254 | 10.6.239.255 |
| 112 | 10.6.240.0/20 | 10.6.240.1 – 10.6.255.254 | 10.6.255.255 |
| 113 | 10.7.0.0/20 | 10.7.0.1 – 10.7.15.254 | 10.7.15.255 |
| 114 | 10.7.16.0/20 | 10.7.16.1 – 10.7.31.254 | 10.7.31.255 |
| 115 | 10.7.32.0/20 | 10.7.32.1 – 10.7.47.254 | 10.7.47.255 |
| 116 | 10.7.48.0/20 | 10.7.48.1 – 10.7.63.254 | 10.7.63.255 |
| 117 | 10.7.64.0/20 | 10.7.64.1 – 10.7.79.254 | 10.7.79.255 |
| 118 | 10.7.80.0/20 | 10.7.80.1 – 10.7.95.254 | 10.7.95.255 |
| 119 | 10.7.96.0/20 | 10.7.96.1 – 10.7.111.254 | 10.7.111.255 |
| 120 | 10.7.112.0/20 | 10.7.112.1 – 10.7.127.254 | 10.7.127.255 |
| 121 | 10.7.128.0/20 | 10.7.128.1 – 10.7.143.254 | 10.7.143.255 |
| 122 | 10.7.144.0/20 | 10.7.144.1 – 10.7.159.254 | 10.7.159.255 |
| 123 | 10.7.160.0/20 | 10.7.160.1 – 10.7.175.254 | 10.7.175.255 |
| 124 | 10.7.176.0/20 | 10.7.176.1 – 10.7.191.254 | 10.7.191.255 |
| 125 | 10.7.192.0/20 | 10.7.192.1 – 10.7.207.254 | 10.7.207.255 |
| 126 | 10.7.208.0/20 | 10.7.208.1 – 10.7.223.254 | 10.7.223.255 |
| 127 | 10.7.224.0/20 | 10.7.224.1 – 10.7.239.254 | 10.7.239.255 |
| 128 | 10.7.240.0/20 | 10.7.240.1 – 10.7.255.254 | 10.7.255.255 |
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.