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)10.40.0.0/13
network10.40.0.0/13
broadcast10.47.255.255
first host10.40.0.1
last host10.47.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.40.0.0/13
address00001010.00101000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00101000.00000000.00000000
broadcast00001010.00101111.11111111.11111111
green = network part, grey = host part
hex0x0a280000
decimal170393600
reverse dns0.0.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.40.0.0/20 | 10.40.0.1 – 10.40.15.254 | 10.40.15.255 |
| 2 | 10.40.16.0/20 | 10.40.16.1 – 10.40.31.254 | 10.40.31.255 |
| 3 | 10.40.32.0/20 | 10.40.32.1 – 10.40.47.254 | 10.40.47.255 |
| 4 | 10.40.48.0/20 | 10.40.48.1 – 10.40.63.254 | 10.40.63.255 |
| 5 | 10.40.64.0/20 | 10.40.64.1 – 10.40.79.254 | 10.40.79.255 |
| 6 | 10.40.80.0/20 | 10.40.80.1 – 10.40.95.254 | 10.40.95.255 |
| 7 | 10.40.96.0/20 | 10.40.96.1 – 10.40.111.254 | 10.40.111.255 |
| 8 | 10.40.112.0/20 | 10.40.112.1 – 10.40.127.254 | 10.40.127.255 |
| 9 | 10.40.128.0/20 | 10.40.128.1 – 10.40.143.254 | 10.40.143.255 |
| 10 | 10.40.144.0/20 | 10.40.144.1 – 10.40.159.254 | 10.40.159.255 |
| 11 | 10.40.160.0/20 | 10.40.160.1 – 10.40.175.254 | 10.40.175.255 |
| 12 | 10.40.176.0/20 | 10.40.176.1 – 10.40.191.254 | 10.40.191.255 |
| 13 | 10.40.192.0/20 | 10.40.192.1 – 10.40.207.254 | 10.40.207.255 |
| 14 | 10.40.208.0/20 | 10.40.208.1 – 10.40.223.254 | 10.40.223.255 |
| 15 | 10.40.224.0/20 | 10.40.224.1 – 10.40.239.254 | 10.40.239.255 |
| 16 | 10.40.240.0/20 | 10.40.240.1 – 10.40.255.254 | 10.40.255.255 |
| 17 | 10.41.0.0/20 | 10.41.0.1 – 10.41.15.254 | 10.41.15.255 |
| 18 | 10.41.16.0/20 | 10.41.16.1 – 10.41.31.254 | 10.41.31.255 |
| 19 | 10.41.32.0/20 | 10.41.32.1 – 10.41.47.254 | 10.41.47.255 |
| 20 | 10.41.48.0/20 | 10.41.48.1 – 10.41.63.254 | 10.41.63.255 |
| 21 | 10.41.64.0/20 | 10.41.64.1 – 10.41.79.254 | 10.41.79.255 |
| 22 | 10.41.80.0/20 | 10.41.80.1 – 10.41.95.254 | 10.41.95.255 |
| 23 | 10.41.96.0/20 | 10.41.96.1 – 10.41.111.254 | 10.41.111.255 |
| 24 | 10.41.112.0/20 | 10.41.112.1 – 10.41.127.254 | 10.41.127.255 |
| 25 | 10.41.128.0/20 | 10.41.128.1 – 10.41.143.254 | 10.41.143.255 |
| 26 | 10.41.144.0/20 | 10.41.144.1 – 10.41.159.254 | 10.41.159.255 |
| 27 | 10.41.160.0/20 | 10.41.160.1 – 10.41.175.254 | 10.41.175.255 |
| 28 | 10.41.176.0/20 | 10.41.176.1 – 10.41.191.254 | 10.41.191.255 |
| 29 | 10.41.192.0/20 | 10.41.192.1 – 10.41.207.254 | 10.41.207.255 |
| 30 | 10.41.208.0/20 | 10.41.208.1 – 10.41.223.254 | 10.41.223.255 |
| 31 | 10.41.224.0/20 | 10.41.224.1 – 10.41.239.254 | 10.41.239.255 |
| 32 | 10.41.240.0/20 | 10.41.240.1 – 10.41.255.254 | 10.41.255.255 |
| 33 | 10.42.0.0/20 | 10.42.0.1 – 10.42.15.254 | 10.42.15.255 |
| 34 | 10.42.16.0/20 | 10.42.16.1 – 10.42.31.254 | 10.42.31.255 |
| 35 | 10.42.32.0/20 | 10.42.32.1 – 10.42.47.254 | 10.42.47.255 |
| 36 | 10.42.48.0/20 | 10.42.48.1 – 10.42.63.254 | 10.42.63.255 |
| 37 | 10.42.64.0/20 | 10.42.64.1 – 10.42.79.254 | 10.42.79.255 |
| 38 | 10.42.80.0/20 | 10.42.80.1 – 10.42.95.254 | 10.42.95.255 |
| 39 | 10.42.96.0/20 | 10.42.96.1 – 10.42.111.254 | 10.42.111.255 |
| 40 | 10.42.112.0/20 | 10.42.112.1 – 10.42.127.254 | 10.42.127.255 |
| 41 | 10.42.128.0/20 | 10.42.128.1 – 10.42.143.254 | 10.42.143.255 |
| 42 | 10.42.144.0/20 | 10.42.144.1 – 10.42.159.254 | 10.42.159.255 |
| 43 | 10.42.160.0/20 | 10.42.160.1 – 10.42.175.254 | 10.42.175.255 |
| 44 | 10.42.176.0/20 | 10.42.176.1 – 10.42.191.254 | 10.42.191.255 |
| 45 | 10.42.192.0/20 | 10.42.192.1 – 10.42.207.254 | 10.42.207.255 |
| 46 | 10.42.208.0/20 | 10.42.208.1 – 10.42.223.254 | 10.42.223.255 |
| 47 | 10.42.224.0/20 | 10.42.224.1 – 10.42.239.254 | 10.42.239.255 |
| 48 | 10.42.240.0/20 | 10.42.240.1 – 10.42.255.254 | 10.42.255.255 |
| 49 | 10.43.0.0/20 | 10.43.0.1 – 10.43.15.254 | 10.43.15.255 |
| 50 | 10.43.16.0/20 | 10.43.16.1 – 10.43.31.254 | 10.43.31.255 |
| 51 | 10.43.32.0/20 | 10.43.32.1 – 10.43.47.254 | 10.43.47.255 |
| 52 | 10.43.48.0/20 | 10.43.48.1 – 10.43.63.254 | 10.43.63.255 |
| 53 | 10.43.64.0/20 | 10.43.64.1 – 10.43.79.254 | 10.43.79.255 |
| 54 | 10.43.80.0/20 | 10.43.80.1 – 10.43.95.254 | 10.43.95.255 |
| 55 | 10.43.96.0/20 | 10.43.96.1 – 10.43.111.254 | 10.43.111.255 |
| 56 | 10.43.112.0/20 | 10.43.112.1 – 10.43.127.254 | 10.43.127.255 |
| 57 | 10.43.128.0/20 | 10.43.128.1 – 10.43.143.254 | 10.43.143.255 |
| 58 | 10.43.144.0/20 | 10.43.144.1 – 10.43.159.254 | 10.43.159.255 |
| 59 | 10.43.160.0/20 | 10.43.160.1 – 10.43.175.254 | 10.43.175.255 |
| 60 | 10.43.176.0/20 | 10.43.176.1 – 10.43.191.254 | 10.43.191.255 |
| 61 | 10.43.192.0/20 | 10.43.192.1 – 10.43.207.254 | 10.43.207.255 |
| 62 | 10.43.208.0/20 | 10.43.208.1 – 10.43.223.254 | 10.43.223.255 |
| 63 | 10.43.224.0/20 | 10.43.224.1 – 10.43.239.254 | 10.43.239.255 |
| 64 | 10.43.240.0/20 | 10.43.240.1 – 10.43.255.254 | 10.43.255.255 |
| 65 | 10.44.0.0/20 | 10.44.0.1 – 10.44.15.254 | 10.44.15.255 |
| 66 | 10.44.16.0/20 | 10.44.16.1 – 10.44.31.254 | 10.44.31.255 |
| 67 | 10.44.32.0/20 | 10.44.32.1 – 10.44.47.254 | 10.44.47.255 |
| 68 | 10.44.48.0/20 | 10.44.48.1 – 10.44.63.254 | 10.44.63.255 |
| 69 | 10.44.64.0/20 | 10.44.64.1 – 10.44.79.254 | 10.44.79.255 |
| 70 | 10.44.80.0/20 | 10.44.80.1 – 10.44.95.254 | 10.44.95.255 |
| 71 | 10.44.96.0/20 | 10.44.96.1 – 10.44.111.254 | 10.44.111.255 |
| 72 | 10.44.112.0/20 | 10.44.112.1 – 10.44.127.254 | 10.44.127.255 |
| 73 | 10.44.128.0/20 | 10.44.128.1 – 10.44.143.254 | 10.44.143.255 |
| 74 | 10.44.144.0/20 | 10.44.144.1 – 10.44.159.254 | 10.44.159.255 |
| 75 | 10.44.160.0/20 | 10.44.160.1 – 10.44.175.254 | 10.44.175.255 |
| 76 | 10.44.176.0/20 | 10.44.176.1 – 10.44.191.254 | 10.44.191.255 |
| 77 | 10.44.192.0/20 | 10.44.192.1 – 10.44.207.254 | 10.44.207.255 |
| 78 | 10.44.208.0/20 | 10.44.208.1 – 10.44.223.254 | 10.44.223.255 |
| 79 | 10.44.224.0/20 | 10.44.224.1 – 10.44.239.254 | 10.44.239.255 |
| 80 | 10.44.240.0/20 | 10.44.240.1 – 10.44.255.254 | 10.44.255.255 |
| 81 | 10.45.0.0/20 | 10.45.0.1 – 10.45.15.254 | 10.45.15.255 |
| 82 | 10.45.16.0/20 | 10.45.16.1 – 10.45.31.254 | 10.45.31.255 |
| 83 | 10.45.32.0/20 | 10.45.32.1 – 10.45.47.254 | 10.45.47.255 |
| 84 | 10.45.48.0/20 | 10.45.48.1 – 10.45.63.254 | 10.45.63.255 |
| 85 | 10.45.64.0/20 | 10.45.64.1 – 10.45.79.254 | 10.45.79.255 |
| 86 | 10.45.80.0/20 | 10.45.80.1 – 10.45.95.254 | 10.45.95.255 |
| 87 | 10.45.96.0/20 | 10.45.96.1 – 10.45.111.254 | 10.45.111.255 |
| 88 | 10.45.112.0/20 | 10.45.112.1 – 10.45.127.254 | 10.45.127.255 |
| 89 | 10.45.128.0/20 | 10.45.128.1 – 10.45.143.254 | 10.45.143.255 |
| 90 | 10.45.144.0/20 | 10.45.144.1 – 10.45.159.254 | 10.45.159.255 |
| 91 | 10.45.160.0/20 | 10.45.160.1 – 10.45.175.254 | 10.45.175.255 |
| 92 | 10.45.176.0/20 | 10.45.176.1 – 10.45.191.254 | 10.45.191.255 |
| 93 | 10.45.192.0/20 | 10.45.192.1 – 10.45.207.254 | 10.45.207.255 |
| 94 | 10.45.208.0/20 | 10.45.208.1 – 10.45.223.254 | 10.45.223.255 |
| 95 | 10.45.224.0/20 | 10.45.224.1 – 10.45.239.254 | 10.45.239.255 |
| 96 | 10.45.240.0/20 | 10.45.240.1 – 10.45.255.254 | 10.45.255.255 |
| 97 | 10.46.0.0/20 | 10.46.0.1 – 10.46.15.254 | 10.46.15.255 |
| 98 | 10.46.16.0/20 | 10.46.16.1 – 10.46.31.254 | 10.46.31.255 |
| 99 | 10.46.32.0/20 | 10.46.32.1 – 10.46.47.254 | 10.46.47.255 |
| 100 | 10.46.48.0/20 | 10.46.48.1 – 10.46.63.254 | 10.46.63.255 |
| 101 | 10.46.64.0/20 | 10.46.64.1 – 10.46.79.254 | 10.46.79.255 |
| 102 | 10.46.80.0/20 | 10.46.80.1 – 10.46.95.254 | 10.46.95.255 |
| 103 | 10.46.96.0/20 | 10.46.96.1 – 10.46.111.254 | 10.46.111.255 |
| 104 | 10.46.112.0/20 | 10.46.112.1 – 10.46.127.254 | 10.46.127.255 |
| 105 | 10.46.128.0/20 | 10.46.128.1 – 10.46.143.254 | 10.46.143.255 |
| 106 | 10.46.144.0/20 | 10.46.144.1 – 10.46.159.254 | 10.46.159.255 |
| 107 | 10.46.160.0/20 | 10.46.160.1 – 10.46.175.254 | 10.46.175.255 |
| 108 | 10.46.176.0/20 | 10.46.176.1 – 10.46.191.254 | 10.46.191.255 |
| 109 | 10.46.192.0/20 | 10.46.192.1 – 10.46.207.254 | 10.46.207.255 |
| 110 | 10.46.208.0/20 | 10.46.208.1 – 10.46.223.254 | 10.46.223.255 |
| 111 | 10.46.224.0/20 | 10.46.224.1 – 10.46.239.254 | 10.46.239.255 |
| 112 | 10.46.240.0/20 | 10.46.240.1 – 10.46.255.254 | 10.46.255.255 |
| 113 | 10.47.0.0/20 | 10.47.0.1 – 10.47.15.254 | 10.47.15.255 |
| 114 | 10.47.16.0/20 | 10.47.16.1 – 10.47.31.254 | 10.47.31.255 |
| 115 | 10.47.32.0/20 | 10.47.32.1 – 10.47.47.254 | 10.47.47.255 |
| 116 | 10.47.48.0/20 | 10.47.48.1 – 10.47.63.254 | 10.47.63.255 |
| 117 | 10.47.64.0/20 | 10.47.64.1 – 10.47.79.254 | 10.47.79.255 |
| 118 | 10.47.80.0/20 | 10.47.80.1 – 10.47.95.254 | 10.47.95.255 |
| 119 | 10.47.96.0/20 | 10.47.96.1 – 10.47.111.254 | 10.47.111.255 |
| 120 | 10.47.112.0/20 | 10.47.112.1 – 10.47.127.254 | 10.47.127.255 |
| 121 | 10.47.128.0/20 | 10.47.128.1 – 10.47.143.254 | 10.47.143.255 |
| 122 | 10.47.144.0/20 | 10.47.144.1 – 10.47.159.254 | 10.47.159.255 |
| 123 | 10.47.160.0/20 | 10.47.160.1 – 10.47.175.254 | 10.47.175.255 |
| 124 | 10.47.176.0/20 | 10.47.176.1 – 10.47.191.254 | 10.47.191.255 |
| 125 | 10.47.192.0/20 | 10.47.192.1 – 10.47.207.254 | 10.47.207.255 |
| 126 | 10.47.208.0/20 | 10.47.208.1 – 10.47.223.254 | 10.47.223.255 |
| 127 | 10.47.224.0/20 | 10.47.224.1 – 10.47.239.254 | 10.47.239.255 |
| 128 | 10.47.240.0/20 | 10.47.240.1 – 10.47.255.254 | 10.47.255.255 |
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.