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)10.136.0.0/13
network10.136.0.0/13
broadcast10.143.255.255
first host10.136.0.1
last host10.143.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.136.0.0/13
address00001010.10001000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.10001000.00000000.00000000
broadcast00001010.10001111.11111111.11111111
green = network part, grey = host part
hex0x0a880000
decimal176685056
reverse dns0.0.136.10.in-addr.arpa
ipv4-mapped::ffff:a88:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.136.0.0/20 | 10.136.0.1 – 10.136.15.254 | 10.136.15.255 |
| 2 | 10.136.16.0/20 | 10.136.16.1 – 10.136.31.254 | 10.136.31.255 |
| 3 | 10.136.32.0/20 | 10.136.32.1 – 10.136.47.254 | 10.136.47.255 |
| 4 | 10.136.48.0/20 | 10.136.48.1 – 10.136.63.254 | 10.136.63.255 |
| 5 | 10.136.64.0/20 | 10.136.64.1 – 10.136.79.254 | 10.136.79.255 |
| 6 | 10.136.80.0/20 | 10.136.80.1 – 10.136.95.254 | 10.136.95.255 |
| 7 | 10.136.96.0/20 | 10.136.96.1 – 10.136.111.254 | 10.136.111.255 |
| 8 | 10.136.112.0/20 | 10.136.112.1 – 10.136.127.254 | 10.136.127.255 |
| 9 | 10.136.128.0/20 | 10.136.128.1 – 10.136.143.254 | 10.136.143.255 |
| 10 | 10.136.144.0/20 | 10.136.144.1 – 10.136.159.254 | 10.136.159.255 |
| 11 | 10.136.160.0/20 | 10.136.160.1 – 10.136.175.254 | 10.136.175.255 |
| 12 | 10.136.176.0/20 | 10.136.176.1 – 10.136.191.254 | 10.136.191.255 |
| 13 | 10.136.192.0/20 | 10.136.192.1 – 10.136.207.254 | 10.136.207.255 |
| 14 | 10.136.208.0/20 | 10.136.208.1 – 10.136.223.254 | 10.136.223.255 |
| 15 | 10.136.224.0/20 | 10.136.224.1 – 10.136.239.254 | 10.136.239.255 |
| 16 | 10.136.240.0/20 | 10.136.240.1 – 10.136.255.254 | 10.136.255.255 |
| 17 | 10.137.0.0/20 | 10.137.0.1 – 10.137.15.254 | 10.137.15.255 |
| 18 | 10.137.16.0/20 | 10.137.16.1 – 10.137.31.254 | 10.137.31.255 |
| 19 | 10.137.32.0/20 | 10.137.32.1 – 10.137.47.254 | 10.137.47.255 |
| 20 | 10.137.48.0/20 | 10.137.48.1 – 10.137.63.254 | 10.137.63.255 |
| 21 | 10.137.64.0/20 | 10.137.64.1 – 10.137.79.254 | 10.137.79.255 |
| 22 | 10.137.80.0/20 | 10.137.80.1 – 10.137.95.254 | 10.137.95.255 |
| 23 | 10.137.96.0/20 | 10.137.96.1 – 10.137.111.254 | 10.137.111.255 |
| 24 | 10.137.112.0/20 | 10.137.112.1 – 10.137.127.254 | 10.137.127.255 |
| 25 | 10.137.128.0/20 | 10.137.128.1 – 10.137.143.254 | 10.137.143.255 |
| 26 | 10.137.144.0/20 | 10.137.144.1 – 10.137.159.254 | 10.137.159.255 |
| 27 | 10.137.160.0/20 | 10.137.160.1 – 10.137.175.254 | 10.137.175.255 |
| 28 | 10.137.176.0/20 | 10.137.176.1 – 10.137.191.254 | 10.137.191.255 |
| 29 | 10.137.192.0/20 | 10.137.192.1 – 10.137.207.254 | 10.137.207.255 |
| 30 | 10.137.208.0/20 | 10.137.208.1 – 10.137.223.254 | 10.137.223.255 |
| 31 | 10.137.224.0/20 | 10.137.224.1 – 10.137.239.254 | 10.137.239.255 |
| 32 | 10.137.240.0/20 | 10.137.240.1 – 10.137.255.254 | 10.137.255.255 |
| 33 | 10.138.0.0/20 | 10.138.0.1 – 10.138.15.254 | 10.138.15.255 |
| 34 | 10.138.16.0/20 | 10.138.16.1 – 10.138.31.254 | 10.138.31.255 |
| 35 | 10.138.32.0/20 | 10.138.32.1 – 10.138.47.254 | 10.138.47.255 |
| 36 | 10.138.48.0/20 | 10.138.48.1 – 10.138.63.254 | 10.138.63.255 |
| 37 | 10.138.64.0/20 | 10.138.64.1 – 10.138.79.254 | 10.138.79.255 |
| 38 | 10.138.80.0/20 | 10.138.80.1 – 10.138.95.254 | 10.138.95.255 |
| 39 | 10.138.96.0/20 | 10.138.96.1 – 10.138.111.254 | 10.138.111.255 |
| 40 | 10.138.112.0/20 | 10.138.112.1 – 10.138.127.254 | 10.138.127.255 |
| 41 | 10.138.128.0/20 | 10.138.128.1 – 10.138.143.254 | 10.138.143.255 |
| 42 | 10.138.144.0/20 | 10.138.144.1 – 10.138.159.254 | 10.138.159.255 |
| 43 | 10.138.160.0/20 | 10.138.160.1 – 10.138.175.254 | 10.138.175.255 |
| 44 | 10.138.176.0/20 | 10.138.176.1 – 10.138.191.254 | 10.138.191.255 |
| 45 | 10.138.192.0/20 | 10.138.192.1 – 10.138.207.254 | 10.138.207.255 |
| 46 | 10.138.208.0/20 | 10.138.208.1 – 10.138.223.254 | 10.138.223.255 |
| 47 | 10.138.224.0/20 | 10.138.224.1 – 10.138.239.254 | 10.138.239.255 |
| 48 | 10.138.240.0/20 | 10.138.240.1 – 10.138.255.254 | 10.138.255.255 |
| 49 | 10.139.0.0/20 | 10.139.0.1 – 10.139.15.254 | 10.139.15.255 |
| 50 | 10.139.16.0/20 | 10.139.16.1 – 10.139.31.254 | 10.139.31.255 |
| 51 | 10.139.32.0/20 | 10.139.32.1 – 10.139.47.254 | 10.139.47.255 |
| 52 | 10.139.48.0/20 | 10.139.48.1 – 10.139.63.254 | 10.139.63.255 |
| 53 | 10.139.64.0/20 | 10.139.64.1 – 10.139.79.254 | 10.139.79.255 |
| 54 | 10.139.80.0/20 | 10.139.80.1 – 10.139.95.254 | 10.139.95.255 |
| 55 | 10.139.96.0/20 | 10.139.96.1 – 10.139.111.254 | 10.139.111.255 |
| 56 | 10.139.112.0/20 | 10.139.112.1 – 10.139.127.254 | 10.139.127.255 |
| 57 | 10.139.128.0/20 | 10.139.128.1 – 10.139.143.254 | 10.139.143.255 |
| 58 | 10.139.144.0/20 | 10.139.144.1 – 10.139.159.254 | 10.139.159.255 |
| 59 | 10.139.160.0/20 | 10.139.160.1 – 10.139.175.254 | 10.139.175.255 |
| 60 | 10.139.176.0/20 | 10.139.176.1 – 10.139.191.254 | 10.139.191.255 |
| 61 | 10.139.192.0/20 | 10.139.192.1 – 10.139.207.254 | 10.139.207.255 |
| 62 | 10.139.208.0/20 | 10.139.208.1 – 10.139.223.254 | 10.139.223.255 |
| 63 | 10.139.224.0/20 | 10.139.224.1 – 10.139.239.254 | 10.139.239.255 |
| 64 | 10.139.240.0/20 | 10.139.240.1 – 10.139.255.254 | 10.139.255.255 |
| 65 | 10.140.0.0/20 | 10.140.0.1 – 10.140.15.254 | 10.140.15.255 |
| 66 | 10.140.16.0/20 | 10.140.16.1 – 10.140.31.254 | 10.140.31.255 |
| 67 | 10.140.32.0/20 | 10.140.32.1 – 10.140.47.254 | 10.140.47.255 |
| 68 | 10.140.48.0/20 | 10.140.48.1 – 10.140.63.254 | 10.140.63.255 |
| 69 | 10.140.64.0/20 | 10.140.64.1 – 10.140.79.254 | 10.140.79.255 |
| 70 | 10.140.80.0/20 | 10.140.80.1 – 10.140.95.254 | 10.140.95.255 |
| 71 | 10.140.96.0/20 | 10.140.96.1 – 10.140.111.254 | 10.140.111.255 |
| 72 | 10.140.112.0/20 | 10.140.112.1 – 10.140.127.254 | 10.140.127.255 |
| 73 | 10.140.128.0/20 | 10.140.128.1 – 10.140.143.254 | 10.140.143.255 |
| 74 | 10.140.144.0/20 | 10.140.144.1 – 10.140.159.254 | 10.140.159.255 |
| 75 | 10.140.160.0/20 | 10.140.160.1 – 10.140.175.254 | 10.140.175.255 |
| 76 | 10.140.176.0/20 | 10.140.176.1 – 10.140.191.254 | 10.140.191.255 |
| 77 | 10.140.192.0/20 | 10.140.192.1 – 10.140.207.254 | 10.140.207.255 |
| 78 | 10.140.208.0/20 | 10.140.208.1 – 10.140.223.254 | 10.140.223.255 |
| 79 | 10.140.224.0/20 | 10.140.224.1 – 10.140.239.254 | 10.140.239.255 |
| 80 | 10.140.240.0/20 | 10.140.240.1 – 10.140.255.254 | 10.140.255.255 |
| 81 | 10.141.0.0/20 | 10.141.0.1 – 10.141.15.254 | 10.141.15.255 |
| 82 | 10.141.16.0/20 | 10.141.16.1 – 10.141.31.254 | 10.141.31.255 |
| 83 | 10.141.32.0/20 | 10.141.32.1 – 10.141.47.254 | 10.141.47.255 |
| 84 | 10.141.48.0/20 | 10.141.48.1 – 10.141.63.254 | 10.141.63.255 |
| 85 | 10.141.64.0/20 | 10.141.64.1 – 10.141.79.254 | 10.141.79.255 |
| 86 | 10.141.80.0/20 | 10.141.80.1 – 10.141.95.254 | 10.141.95.255 |
| 87 | 10.141.96.0/20 | 10.141.96.1 – 10.141.111.254 | 10.141.111.255 |
| 88 | 10.141.112.0/20 | 10.141.112.1 – 10.141.127.254 | 10.141.127.255 |
| 89 | 10.141.128.0/20 | 10.141.128.1 – 10.141.143.254 | 10.141.143.255 |
| 90 | 10.141.144.0/20 | 10.141.144.1 – 10.141.159.254 | 10.141.159.255 |
| 91 | 10.141.160.0/20 | 10.141.160.1 – 10.141.175.254 | 10.141.175.255 |
| 92 | 10.141.176.0/20 | 10.141.176.1 – 10.141.191.254 | 10.141.191.255 |
| 93 | 10.141.192.0/20 | 10.141.192.1 – 10.141.207.254 | 10.141.207.255 |
| 94 | 10.141.208.0/20 | 10.141.208.1 – 10.141.223.254 | 10.141.223.255 |
| 95 | 10.141.224.0/20 | 10.141.224.1 – 10.141.239.254 | 10.141.239.255 |
| 96 | 10.141.240.0/20 | 10.141.240.1 – 10.141.255.254 | 10.141.255.255 |
| 97 | 10.142.0.0/20 | 10.142.0.1 – 10.142.15.254 | 10.142.15.255 |
| 98 | 10.142.16.0/20 | 10.142.16.1 – 10.142.31.254 | 10.142.31.255 |
| 99 | 10.142.32.0/20 | 10.142.32.1 – 10.142.47.254 | 10.142.47.255 |
| 100 | 10.142.48.0/20 | 10.142.48.1 – 10.142.63.254 | 10.142.63.255 |
| 101 | 10.142.64.0/20 | 10.142.64.1 – 10.142.79.254 | 10.142.79.255 |
| 102 | 10.142.80.0/20 | 10.142.80.1 – 10.142.95.254 | 10.142.95.255 |
| 103 | 10.142.96.0/20 | 10.142.96.1 – 10.142.111.254 | 10.142.111.255 |
| 104 | 10.142.112.0/20 | 10.142.112.1 – 10.142.127.254 | 10.142.127.255 |
| 105 | 10.142.128.0/20 | 10.142.128.1 – 10.142.143.254 | 10.142.143.255 |
| 106 | 10.142.144.0/20 | 10.142.144.1 – 10.142.159.254 | 10.142.159.255 |
| 107 | 10.142.160.0/20 | 10.142.160.1 – 10.142.175.254 | 10.142.175.255 |
| 108 | 10.142.176.0/20 | 10.142.176.1 – 10.142.191.254 | 10.142.191.255 |
| 109 | 10.142.192.0/20 | 10.142.192.1 – 10.142.207.254 | 10.142.207.255 |
| 110 | 10.142.208.0/20 | 10.142.208.1 – 10.142.223.254 | 10.142.223.255 |
| 111 | 10.142.224.0/20 | 10.142.224.1 – 10.142.239.254 | 10.142.239.255 |
| 112 | 10.142.240.0/20 | 10.142.240.1 – 10.142.255.254 | 10.142.255.255 |
| 113 | 10.143.0.0/20 | 10.143.0.1 – 10.143.15.254 | 10.143.15.255 |
| 114 | 10.143.16.0/20 | 10.143.16.1 – 10.143.31.254 | 10.143.31.255 |
| 115 | 10.143.32.0/20 | 10.143.32.1 – 10.143.47.254 | 10.143.47.255 |
| 116 | 10.143.48.0/20 | 10.143.48.1 – 10.143.63.254 | 10.143.63.255 |
| 117 | 10.143.64.0/20 | 10.143.64.1 – 10.143.79.254 | 10.143.79.255 |
| 118 | 10.143.80.0/20 | 10.143.80.1 – 10.143.95.254 | 10.143.95.255 |
| 119 | 10.143.96.0/20 | 10.143.96.1 – 10.143.111.254 | 10.143.111.255 |
| 120 | 10.143.112.0/20 | 10.143.112.1 – 10.143.127.254 | 10.143.127.255 |
| 121 | 10.143.128.0/20 | 10.143.128.1 – 10.143.143.254 | 10.143.143.255 |
| 122 | 10.143.144.0/20 | 10.143.144.1 – 10.143.159.254 | 10.143.159.255 |
| 123 | 10.143.160.0/20 | 10.143.160.1 – 10.143.175.254 | 10.143.175.255 |
| 124 | 10.143.176.0/20 | 10.143.176.1 – 10.143.191.254 | 10.143.191.255 |
| 125 | 10.143.192.0/20 | 10.143.192.1 – 10.143.207.254 | 10.143.207.255 |
| 126 | 10.143.208.0/20 | 10.143.208.1 – 10.143.223.254 | 10.143.223.255 |
| 127 | 10.143.224.0/20 | 10.143.224.1 – 10.143.239.254 | 10.143.239.255 |
| 128 | 10.143.240.0/20 | 10.143.240.1 – 10.143.255.254 | 10.143.255.255 |
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.