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)10.248.0.0/13
network10.248.0.0/13
broadcast10.255.255.255
first host10.248.0.1
last host10.255.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.248.0.0/13
address00001010.11111000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.11111000.00000000.00000000
broadcast00001010.11111111.11111111.11111111
green = network part, grey = host part
hex0x0af80000
decimal184025088
reverse dns0.0.248.10.in-addr.arpa
ipv4-mapped::ffff:af8:0
/13 split into /20 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.248.0.0/20 | 10.248.0.1 – 10.248.15.254 | 10.248.15.255 |
| 2 | 10.248.16.0/20 | 10.248.16.1 – 10.248.31.254 | 10.248.31.255 |
| 3 | 10.248.32.0/20 | 10.248.32.1 – 10.248.47.254 | 10.248.47.255 |
| 4 | 10.248.48.0/20 | 10.248.48.1 – 10.248.63.254 | 10.248.63.255 |
| 5 | 10.248.64.0/20 | 10.248.64.1 – 10.248.79.254 | 10.248.79.255 |
| 6 | 10.248.80.0/20 | 10.248.80.1 – 10.248.95.254 | 10.248.95.255 |
| 7 | 10.248.96.0/20 | 10.248.96.1 – 10.248.111.254 | 10.248.111.255 |
| 8 | 10.248.112.0/20 | 10.248.112.1 – 10.248.127.254 | 10.248.127.255 |
| 9 | 10.248.128.0/20 | 10.248.128.1 – 10.248.143.254 | 10.248.143.255 |
| 10 | 10.248.144.0/20 | 10.248.144.1 – 10.248.159.254 | 10.248.159.255 |
| 11 | 10.248.160.0/20 | 10.248.160.1 – 10.248.175.254 | 10.248.175.255 |
| 12 | 10.248.176.0/20 | 10.248.176.1 – 10.248.191.254 | 10.248.191.255 |
| 13 | 10.248.192.0/20 | 10.248.192.1 – 10.248.207.254 | 10.248.207.255 |
| 14 | 10.248.208.0/20 | 10.248.208.1 – 10.248.223.254 | 10.248.223.255 |
| 15 | 10.248.224.0/20 | 10.248.224.1 – 10.248.239.254 | 10.248.239.255 |
| 16 | 10.248.240.0/20 | 10.248.240.1 – 10.248.255.254 | 10.248.255.255 |
| 17 | 10.249.0.0/20 | 10.249.0.1 – 10.249.15.254 | 10.249.15.255 |
| 18 | 10.249.16.0/20 | 10.249.16.1 – 10.249.31.254 | 10.249.31.255 |
| 19 | 10.249.32.0/20 | 10.249.32.1 – 10.249.47.254 | 10.249.47.255 |
| 20 | 10.249.48.0/20 | 10.249.48.1 – 10.249.63.254 | 10.249.63.255 |
| 21 | 10.249.64.0/20 | 10.249.64.1 – 10.249.79.254 | 10.249.79.255 |
| 22 | 10.249.80.0/20 | 10.249.80.1 – 10.249.95.254 | 10.249.95.255 |
| 23 | 10.249.96.0/20 | 10.249.96.1 – 10.249.111.254 | 10.249.111.255 |
| 24 | 10.249.112.0/20 | 10.249.112.1 – 10.249.127.254 | 10.249.127.255 |
| 25 | 10.249.128.0/20 | 10.249.128.1 – 10.249.143.254 | 10.249.143.255 |
| 26 | 10.249.144.0/20 | 10.249.144.1 – 10.249.159.254 | 10.249.159.255 |
| 27 | 10.249.160.0/20 | 10.249.160.1 – 10.249.175.254 | 10.249.175.255 |
| 28 | 10.249.176.0/20 | 10.249.176.1 – 10.249.191.254 | 10.249.191.255 |
| 29 | 10.249.192.0/20 | 10.249.192.1 – 10.249.207.254 | 10.249.207.255 |
| 30 | 10.249.208.0/20 | 10.249.208.1 – 10.249.223.254 | 10.249.223.255 |
| 31 | 10.249.224.0/20 | 10.249.224.1 – 10.249.239.254 | 10.249.239.255 |
| 32 | 10.249.240.0/20 | 10.249.240.1 – 10.249.255.254 | 10.249.255.255 |
| 33 | 10.250.0.0/20 | 10.250.0.1 – 10.250.15.254 | 10.250.15.255 |
| 34 | 10.250.16.0/20 | 10.250.16.1 – 10.250.31.254 | 10.250.31.255 |
| 35 | 10.250.32.0/20 | 10.250.32.1 – 10.250.47.254 | 10.250.47.255 |
| 36 | 10.250.48.0/20 | 10.250.48.1 – 10.250.63.254 | 10.250.63.255 |
| 37 | 10.250.64.0/20 | 10.250.64.1 – 10.250.79.254 | 10.250.79.255 |
| 38 | 10.250.80.0/20 | 10.250.80.1 – 10.250.95.254 | 10.250.95.255 |
| 39 | 10.250.96.0/20 | 10.250.96.1 – 10.250.111.254 | 10.250.111.255 |
| 40 | 10.250.112.0/20 | 10.250.112.1 – 10.250.127.254 | 10.250.127.255 |
| 41 | 10.250.128.0/20 | 10.250.128.1 – 10.250.143.254 | 10.250.143.255 |
| 42 | 10.250.144.0/20 | 10.250.144.1 – 10.250.159.254 | 10.250.159.255 |
| 43 | 10.250.160.0/20 | 10.250.160.1 – 10.250.175.254 | 10.250.175.255 |
| 44 | 10.250.176.0/20 | 10.250.176.1 – 10.250.191.254 | 10.250.191.255 |
| 45 | 10.250.192.0/20 | 10.250.192.1 – 10.250.207.254 | 10.250.207.255 |
| 46 | 10.250.208.0/20 | 10.250.208.1 – 10.250.223.254 | 10.250.223.255 |
| 47 | 10.250.224.0/20 | 10.250.224.1 – 10.250.239.254 | 10.250.239.255 |
| 48 | 10.250.240.0/20 | 10.250.240.1 – 10.250.255.254 | 10.250.255.255 |
| 49 | 10.251.0.0/20 | 10.251.0.1 – 10.251.15.254 | 10.251.15.255 |
| 50 | 10.251.16.0/20 | 10.251.16.1 – 10.251.31.254 | 10.251.31.255 |
| 51 | 10.251.32.0/20 | 10.251.32.1 – 10.251.47.254 | 10.251.47.255 |
| 52 | 10.251.48.0/20 | 10.251.48.1 – 10.251.63.254 | 10.251.63.255 |
| 53 | 10.251.64.0/20 | 10.251.64.1 – 10.251.79.254 | 10.251.79.255 |
| 54 | 10.251.80.0/20 | 10.251.80.1 – 10.251.95.254 | 10.251.95.255 |
| 55 | 10.251.96.0/20 | 10.251.96.1 – 10.251.111.254 | 10.251.111.255 |
| 56 | 10.251.112.0/20 | 10.251.112.1 – 10.251.127.254 | 10.251.127.255 |
| 57 | 10.251.128.0/20 | 10.251.128.1 – 10.251.143.254 | 10.251.143.255 |
| 58 | 10.251.144.0/20 | 10.251.144.1 – 10.251.159.254 | 10.251.159.255 |
| 59 | 10.251.160.0/20 | 10.251.160.1 – 10.251.175.254 | 10.251.175.255 |
| 60 | 10.251.176.0/20 | 10.251.176.1 – 10.251.191.254 | 10.251.191.255 |
| 61 | 10.251.192.0/20 | 10.251.192.1 – 10.251.207.254 | 10.251.207.255 |
| 62 | 10.251.208.0/20 | 10.251.208.1 – 10.251.223.254 | 10.251.223.255 |
| 63 | 10.251.224.0/20 | 10.251.224.1 – 10.251.239.254 | 10.251.239.255 |
| 64 | 10.251.240.0/20 | 10.251.240.1 – 10.251.255.254 | 10.251.255.255 |
| 65 | 10.252.0.0/20 | 10.252.0.1 – 10.252.15.254 | 10.252.15.255 |
| 66 | 10.252.16.0/20 | 10.252.16.1 – 10.252.31.254 | 10.252.31.255 |
| 67 | 10.252.32.0/20 | 10.252.32.1 – 10.252.47.254 | 10.252.47.255 |
| 68 | 10.252.48.0/20 | 10.252.48.1 – 10.252.63.254 | 10.252.63.255 |
| 69 | 10.252.64.0/20 | 10.252.64.1 – 10.252.79.254 | 10.252.79.255 |
| 70 | 10.252.80.0/20 | 10.252.80.1 – 10.252.95.254 | 10.252.95.255 |
| 71 | 10.252.96.0/20 | 10.252.96.1 – 10.252.111.254 | 10.252.111.255 |
| 72 | 10.252.112.0/20 | 10.252.112.1 – 10.252.127.254 | 10.252.127.255 |
| 73 | 10.252.128.0/20 | 10.252.128.1 – 10.252.143.254 | 10.252.143.255 |
| 74 | 10.252.144.0/20 | 10.252.144.1 – 10.252.159.254 | 10.252.159.255 |
| 75 | 10.252.160.0/20 | 10.252.160.1 – 10.252.175.254 | 10.252.175.255 |
| 76 | 10.252.176.0/20 | 10.252.176.1 – 10.252.191.254 | 10.252.191.255 |
| 77 | 10.252.192.0/20 | 10.252.192.1 – 10.252.207.254 | 10.252.207.255 |
| 78 | 10.252.208.0/20 | 10.252.208.1 – 10.252.223.254 | 10.252.223.255 |
| 79 | 10.252.224.0/20 | 10.252.224.1 – 10.252.239.254 | 10.252.239.255 |
| 80 | 10.252.240.0/20 | 10.252.240.1 – 10.252.255.254 | 10.252.255.255 |
| 81 | 10.253.0.0/20 | 10.253.0.1 – 10.253.15.254 | 10.253.15.255 |
| 82 | 10.253.16.0/20 | 10.253.16.1 – 10.253.31.254 | 10.253.31.255 |
| 83 | 10.253.32.0/20 | 10.253.32.1 – 10.253.47.254 | 10.253.47.255 |
| 84 | 10.253.48.0/20 | 10.253.48.1 – 10.253.63.254 | 10.253.63.255 |
| 85 | 10.253.64.0/20 | 10.253.64.1 – 10.253.79.254 | 10.253.79.255 |
| 86 | 10.253.80.0/20 | 10.253.80.1 – 10.253.95.254 | 10.253.95.255 |
| 87 | 10.253.96.0/20 | 10.253.96.1 – 10.253.111.254 | 10.253.111.255 |
| 88 | 10.253.112.0/20 | 10.253.112.1 – 10.253.127.254 | 10.253.127.255 |
| 89 | 10.253.128.0/20 | 10.253.128.1 – 10.253.143.254 | 10.253.143.255 |
| 90 | 10.253.144.0/20 | 10.253.144.1 – 10.253.159.254 | 10.253.159.255 |
| 91 | 10.253.160.0/20 | 10.253.160.1 – 10.253.175.254 | 10.253.175.255 |
| 92 | 10.253.176.0/20 | 10.253.176.1 – 10.253.191.254 | 10.253.191.255 |
| 93 | 10.253.192.0/20 | 10.253.192.1 – 10.253.207.254 | 10.253.207.255 |
| 94 | 10.253.208.0/20 | 10.253.208.1 – 10.253.223.254 | 10.253.223.255 |
| 95 | 10.253.224.0/20 | 10.253.224.1 – 10.253.239.254 | 10.253.239.255 |
| 96 | 10.253.240.0/20 | 10.253.240.1 – 10.253.255.254 | 10.253.255.255 |
| 97 | 10.254.0.0/20 | 10.254.0.1 – 10.254.15.254 | 10.254.15.255 |
| 98 | 10.254.16.0/20 | 10.254.16.1 – 10.254.31.254 | 10.254.31.255 |
| 99 | 10.254.32.0/20 | 10.254.32.1 – 10.254.47.254 | 10.254.47.255 |
| 100 | 10.254.48.0/20 | 10.254.48.1 – 10.254.63.254 | 10.254.63.255 |
| 101 | 10.254.64.0/20 | 10.254.64.1 – 10.254.79.254 | 10.254.79.255 |
| 102 | 10.254.80.0/20 | 10.254.80.1 – 10.254.95.254 | 10.254.95.255 |
| 103 | 10.254.96.0/20 | 10.254.96.1 – 10.254.111.254 | 10.254.111.255 |
| 104 | 10.254.112.0/20 | 10.254.112.1 – 10.254.127.254 | 10.254.127.255 |
| 105 | 10.254.128.0/20 | 10.254.128.1 – 10.254.143.254 | 10.254.143.255 |
| 106 | 10.254.144.0/20 | 10.254.144.1 – 10.254.159.254 | 10.254.159.255 |
| 107 | 10.254.160.0/20 | 10.254.160.1 – 10.254.175.254 | 10.254.175.255 |
| 108 | 10.254.176.0/20 | 10.254.176.1 – 10.254.191.254 | 10.254.191.255 |
| 109 | 10.254.192.0/20 | 10.254.192.1 – 10.254.207.254 | 10.254.207.255 |
| 110 | 10.254.208.0/20 | 10.254.208.1 – 10.254.223.254 | 10.254.223.255 |
| 111 | 10.254.224.0/20 | 10.254.224.1 – 10.254.239.254 | 10.254.239.255 |
| 112 | 10.254.240.0/20 | 10.254.240.1 – 10.254.255.254 | 10.254.255.255 |
| 113 | 10.255.0.0/20 | 10.255.0.1 – 10.255.15.254 | 10.255.15.255 |
| 114 | 10.255.16.0/20 | 10.255.16.1 – 10.255.31.254 | 10.255.31.255 |
| 115 | 10.255.32.0/20 | 10.255.32.1 – 10.255.47.254 | 10.255.47.255 |
| 116 | 10.255.48.0/20 | 10.255.48.1 – 10.255.63.254 | 10.255.63.255 |
| 117 | 10.255.64.0/20 | 10.255.64.1 – 10.255.79.254 | 10.255.79.255 |
| 118 | 10.255.80.0/20 | 10.255.80.1 – 10.255.95.254 | 10.255.95.255 |
| 119 | 10.255.96.0/20 | 10.255.96.1 – 10.255.111.254 | 10.255.111.255 |
| 120 | 10.255.112.0/20 | 10.255.112.1 – 10.255.127.254 | 10.255.127.255 |
| 121 | 10.255.128.0/20 | 10.255.128.1 – 10.255.143.254 | 10.255.143.255 |
| 122 | 10.255.144.0/20 | 10.255.144.1 – 10.255.159.254 | 10.255.159.255 |
| 123 | 10.255.160.0/20 | 10.255.160.1 – 10.255.175.254 | 10.255.175.255 |
| 124 | 10.255.176.0/20 | 10.255.176.1 – 10.255.191.254 | 10.255.191.255 |
| 125 | 10.255.192.0/20 | 10.255.192.1 – 10.255.207.254 | 10.255.207.255 |
| 126 | 10.255.208.0/20 | 10.255.208.1 – 10.255.223.254 | 10.255.223.255 |
| 127 | 10.255.224.0/20 | 10.255.224.1 – 10.255.239.254 | 10.255.239.255 |
| 128 | 10.255.240.0/20 | 10.255.240.1 – 10.255.255.254 | 10.255.255.255 |
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.