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)10.20.224.0/19
network10.20.224.0/19
broadcast10.20.255.255
first host10.20.224.1
last host10.20.255.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.20.224.0/19
address00001010.00010100.11100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010100.11100000.00000000
broadcast00001010.00010100.11111111.11111111
green = network part, grey = host part
hex0x0a14e000
decimal169140224
reverse dns0.224.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:e000
/19 split into /26 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.20.224.0/26 | 10.20.224.1 – 10.20.224.62 | 10.20.224.63 |
| 2 | 10.20.224.64/26 | 10.20.224.65 – 10.20.224.126 | 10.20.224.127 |
| 3 | 10.20.224.128/26 | 10.20.224.129 – 10.20.224.190 | 10.20.224.191 |
| 4 | 10.20.224.192/26 | 10.20.224.193 – 10.20.224.254 | 10.20.224.255 |
| 5 | 10.20.225.0/26 | 10.20.225.1 – 10.20.225.62 | 10.20.225.63 |
| 6 | 10.20.225.64/26 | 10.20.225.65 – 10.20.225.126 | 10.20.225.127 |
| 7 | 10.20.225.128/26 | 10.20.225.129 – 10.20.225.190 | 10.20.225.191 |
| 8 | 10.20.225.192/26 | 10.20.225.193 – 10.20.225.254 | 10.20.225.255 |
| 9 | 10.20.226.0/26 | 10.20.226.1 – 10.20.226.62 | 10.20.226.63 |
| 10 | 10.20.226.64/26 | 10.20.226.65 – 10.20.226.126 | 10.20.226.127 |
| 11 | 10.20.226.128/26 | 10.20.226.129 – 10.20.226.190 | 10.20.226.191 |
| 12 | 10.20.226.192/26 | 10.20.226.193 – 10.20.226.254 | 10.20.226.255 |
| 13 | 10.20.227.0/26 | 10.20.227.1 – 10.20.227.62 | 10.20.227.63 |
| 14 | 10.20.227.64/26 | 10.20.227.65 – 10.20.227.126 | 10.20.227.127 |
| 15 | 10.20.227.128/26 | 10.20.227.129 – 10.20.227.190 | 10.20.227.191 |
| 16 | 10.20.227.192/26 | 10.20.227.193 – 10.20.227.254 | 10.20.227.255 |
| 17 | 10.20.228.0/26 | 10.20.228.1 – 10.20.228.62 | 10.20.228.63 |
| 18 | 10.20.228.64/26 | 10.20.228.65 – 10.20.228.126 | 10.20.228.127 |
| 19 | 10.20.228.128/26 | 10.20.228.129 – 10.20.228.190 | 10.20.228.191 |
| 20 | 10.20.228.192/26 | 10.20.228.193 – 10.20.228.254 | 10.20.228.255 |
| 21 | 10.20.229.0/26 | 10.20.229.1 – 10.20.229.62 | 10.20.229.63 |
| 22 | 10.20.229.64/26 | 10.20.229.65 – 10.20.229.126 | 10.20.229.127 |
| 23 | 10.20.229.128/26 | 10.20.229.129 – 10.20.229.190 | 10.20.229.191 |
| 24 | 10.20.229.192/26 | 10.20.229.193 – 10.20.229.254 | 10.20.229.255 |
| 25 | 10.20.230.0/26 | 10.20.230.1 – 10.20.230.62 | 10.20.230.63 |
| 26 | 10.20.230.64/26 | 10.20.230.65 – 10.20.230.126 | 10.20.230.127 |
| 27 | 10.20.230.128/26 | 10.20.230.129 – 10.20.230.190 | 10.20.230.191 |
| 28 | 10.20.230.192/26 | 10.20.230.193 – 10.20.230.254 | 10.20.230.255 |
| 29 | 10.20.231.0/26 | 10.20.231.1 – 10.20.231.62 | 10.20.231.63 |
| 30 | 10.20.231.64/26 | 10.20.231.65 – 10.20.231.126 | 10.20.231.127 |
| 31 | 10.20.231.128/26 | 10.20.231.129 – 10.20.231.190 | 10.20.231.191 |
| 32 | 10.20.231.192/26 | 10.20.231.193 – 10.20.231.254 | 10.20.231.255 |
| 33 | 10.20.232.0/26 | 10.20.232.1 – 10.20.232.62 | 10.20.232.63 |
| 34 | 10.20.232.64/26 | 10.20.232.65 – 10.20.232.126 | 10.20.232.127 |
| 35 | 10.20.232.128/26 | 10.20.232.129 – 10.20.232.190 | 10.20.232.191 |
| 36 | 10.20.232.192/26 | 10.20.232.193 – 10.20.232.254 | 10.20.232.255 |
| 37 | 10.20.233.0/26 | 10.20.233.1 – 10.20.233.62 | 10.20.233.63 |
| 38 | 10.20.233.64/26 | 10.20.233.65 – 10.20.233.126 | 10.20.233.127 |
| 39 | 10.20.233.128/26 | 10.20.233.129 – 10.20.233.190 | 10.20.233.191 |
| 40 | 10.20.233.192/26 | 10.20.233.193 – 10.20.233.254 | 10.20.233.255 |
| 41 | 10.20.234.0/26 | 10.20.234.1 – 10.20.234.62 | 10.20.234.63 |
| 42 | 10.20.234.64/26 | 10.20.234.65 – 10.20.234.126 | 10.20.234.127 |
| 43 | 10.20.234.128/26 | 10.20.234.129 – 10.20.234.190 | 10.20.234.191 |
| 44 | 10.20.234.192/26 | 10.20.234.193 – 10.20.234.254 | 10.20.234.255 |
| 45 | 10.20.235.0/26 | 10.20.235.1 – 10.20.235.62 | 10.20.235.63 |
| 46 | 10.20.235.64/26 | 10.20.235.65 – 10.20.235.126 | 10.20.235.127 |
| 47 | 10.20.235.128/26 | 10.20.235.129 – 10.20.235.190 | 10.20.235.191 |
| 48 | 10.20.235.192/26 | 10.20.235.193 – 10.20.235.254 | 10.20.235.255 |
| 49 | 10.20.236.0/26 | 10.20.236.1 – 10.20.236.62 | 10.20.236.63 |
| 50 | 10.20.236.64/26 | 10.20.236.65 – 10.20.236.126 | 10.20.236.127 |
| 51 | 10.20.236.128/26 | 10.20.236.129 – 10.20.236.190 | 10.20.236.191 |
| 52 | 10.20.236.192/26 | 10.20.236.193 – 10.20.236.254 | 10.20.236.255 |
| 53 | 10.20.237.0/26 | 10.20.237.1 – 10.20.237.62 | 10.20.237.63 |
| 54 | 10.20.237.64/26 | 10.20.237.65 – 10.20.237.126 | 10.20.237.127 |
| 55 | 10.20.237.128/26 | 10.20.237.129 – 10.20.237.190 | 10.20.237.191 |
| 56 | 10.20.237.192/26 | 10.20.237.193 – 10.20.237.254 | 10.20.237.255 |
| 57 | 10.20.238.0/26 | 10.20.238.1 – 10.20.238.62 | 10.20.238.63 |
| 58 | 10.20.238.64/26 | 10.20.238.65 – 10.20.238.126 | 10.20.238.127 |
| 59 | 10.20.238.128/26 | 10.20.238.129 – 10.20.238.190 | 10.20.238.191 |
| 60 | 10.20.238.192/26 | 10.20.238.193 – 10.20.238.254 | 10.20.238.255 |
| 61 | 10.20.239.0/26 | 10.20.239.1 – 10.20.239.62 | 10.20.239.63 |
| 62 | 10.20.239.64/26 | 10.20.239.65 – 10.20.239.126 | 10.20.239.127 |
| 63 | 10.20.239.128/26 | 10.20.239.129 – 10.20.239.190 | 10.20.239.191 |
| 64 | 10.20.239.192/26 | 10.20.239.193 – 10.20.239.254 | 10.20.239.255 |
| 65 | 10.20.240.0/26 | 10.20.240.1 – 10.20.240.62 | 10.20.240.63 |
| 66 | 10.20.240.64/26 | 10.20.240.65 – 10.20.240.126 | 10.20.240.127 |
| 67 | 10.20.240.128/26 | 10.20.240.129 – 10.20.240.190 | 10.20.240.191 |
| 68 | 10.20.240.192/26 | 10.20.240.193 – 10.20.240.254 | 10.20.240.255 |
| 69 | 10.20.241.0/26 | 10.20.241.1 – 10.20.241.62 | 10.20.241.63 |
| 70 | 10.20.241.64/26 | 10.20.241.65 – 10.20.241.126 | 10.20.241.127 |
| 71 | 10.20.241.128/26 | 10.20.241.129 – 10.20.241.190 | 10.20.241.191 |
| 72 | 10.20.241.192/26 | 10.20.241.193 – 10.20.241.254 | 10.20.241.255 |
| 73 | 10.20.242.0/26 | 10.20.242.1 – 10.20.242.62 | 10.20.242.63 |
| 74 | 10.20.242.64/26 | 10.20.242.65 – 10.20.242.126 | 10.20.242.127 |
| 75 | 10.20.242.128/26 | 10.20.242.129 – 10.20.242.190 | 10.20.242.191 |
| 76 | 10.20.242.192/26 | 10.20.242.193 – 10.20.242.254 | 10.20.242.255 |
| 77 | 10.20.243.0/26 | 10.20.243.1 – 10.20.243.62 | 10.20.243.63 |
| 78 | 10.20.243.64/26 | 10.20.243.65 – 10.20.243.126 | 10.20.243.127 |
| 79 | 10.20.243.128/26 | 10.20.243.129 – 10.20.243.190 | 10.20.243.191 |
| 80 | 10.20.243.192/26 | 10.20.243.193 – 10.20.243.254 | 10.20.243.255 |
| 81 | 10.20.244.0/26 | 10.20.244.1 – 10.20.244.62 | 10.20.244.63 |
| 82 | 10.20.244.64/26 | 10.20.244.65 – 10.20.244.126 | 10.20.244.127 |
| 83 | 10.20.244.128/26 | 10.20.244.129 – 10.20.244.190 | 10.20.244.191 |
| 84 | 10.20.244.192/26 | 10.20.244.193 – 10.20.244.254 | 10.20.244.255 |
| 85 | 10.20.245.0/26 | 10.20.245.1 – 10.20.245.62 | 10.20.245.63 |
| 86 | 10.20.245.64/26 | 10.20.245.65 – 10.20.245.126 | 10.20.245.127 |
| 87 | 10.20.245.128/26 | 10.20.245.129 – 10.20.245.190 | 10.20.245.191 |
| 88 | 10.20.245.192/26 | 10.20.245.193 – 10.20.245.254 | 10.20.245.255 |
| 89 | 10.20.246.0/26 | 10.20.246.1 – 10.20.246.62 | 10.20.246.63 |
| 90 | 10.20.246.64/26 | 10.20.246.65 – 10.20.246.126 | 10.20.246.127 |
| 91 | 10.20.246.128/26 | 10.20.246.129 – 10.20.246.190 | 10.20.246.191 |
| 92 | 10.20.246.192/26 | 10.20.246.193 – 10.20.246.254 | 10.20.246.255 |
| 93 | 10.20.247.0/26 | 10.20.247.1 – 10.20.247.62 | 10.20.247.63 |
| 94 | 10.20.247.64/26 | 10.20.247.65 – 10.20.247.126 | 10.20.247.127 |
| 95 | 10.20.247.128/26 | 10.20.247.129 – 10.20.247.190 | 10.20.247.191 |
| 96 | 10.20.247.192/26 | 10.20.247.193 – 10.20.247.254 | 10.20.247.255 |
| 97 | 10.20.248.0/26 | 10.20.248.1 – 10.20.248.62 | 10.20.248.63 |
| 98 | 10.20.248.64/26 | 10.20.248.65 – 10.20.248.126 | 10.20.248.127 |
| 99 | 10.20.248.128/26 | 10.20.248.129 – 10.20.248.190 | 10.20.248.191 |
| 100 | 10.20.248.192/26 | 10.20.248.193 – 10.20.248.254 | 10.20.248.255 |
| 101 | 10.20.249.0/26 | 10.20.249.1 – 10.20.249.62 | 10.20.249.63 |
| 102 | 10.20.249.64/26 | 10.20.249.65 – 10.20.249.126 | 10.20.249.127 |
| 103 | 10.20.249.128/26 | 10.20.249.129 – 10.20.249.190 | 10.20.249.191 |
| 104 | 10.20.249.192/26 | 10.20.249.193 – 10.20.249.254 | 10.20.249.255 |
| 105 | 10.20.250.0/26 | 10.20.250.1 – 10.20.250.62 | 10.20.250.63 |
| 106 | 10.20.250.64/26 | 10.20.250.65 – 10.20.250.126 | 10.20.250.127 |
| 107 | 10.20.250.128/26 | 10.20.250.129 – 10.20.250.190 | 10.20.250.191 |
| 108 | 10.20.250.192/26 | 10.20.250.193 – 10.20.250.254 | 10.20.250.255 |
| 109 | 10.20.251.0/26 | 10.20.251.1 – 10.20.251.62 | 10.20.251.63 |
| 110 | 10.20.251.64/26 | 10.20.251.65 – 10.20.251.126 | 10.20.251.127 |
| 111 | 10.20.251.128/26 | 10.20.251.129 – 10.20.251.190 | 10.20.251.191 |
| 112 | 10.20.251.192/26 | 10.20.251.193 – 10.20.251.254 | 10.20.251.255 |
| 113 | 10.20.252.0/26 | 10.20.252.1 – 10.20.252.62 | 10.20.252.63 |
| 114 | 10.20.252.64/26 | 10.20.252.65 – 10.20.252.126 | 10.20.252.127 |
| 115 | 10.20.252.128/26 | 10.20.252.129 – 10.20.252.190 | 10.20.252.191 |
| 116 | 10.20.252.192/26 | 10.20.252.193 – 10.20.252.254 | 10.20.252.255 |
| 117 | 10.20.253.0/26 | 10.20.253.1 – 10.20.253.62 | 10.20.253.63 |
| 118 | 10.20.253.64/26 | 10.20.253.65 – 10.20.253.126 | 10.20.253.127 |
| 119 | 10.20.253.128/26 | 10.20.253.129 – 10.20.253.190 | 10.20.253.191 |
| 120 | 10.20.253.192/26 | 10.20.253.193 – 10.20.253.254 | 10.20.253.255 |
| 121 | 10.20.254.0/26 | 10.20.254.1 – 10.20.254.62 | 10.20.254.63 |
| 122 | 10.20.254.64/26 | 10.20.254.65 – 10.20.254.126 | 10.20.254.127 |
| 123 | 10.20.254.128/26 | 10.20.254.129 – 10.20.254.190 | 10.20.254.191 |
| 124 | 10.20.254.192/26 | 10.20.254.193 – 10.20.254.254 | 10.20.254.255 |
| 125 | 10.20.255.0/26 | 10.20.255.1 – 10.20.255.62 | 10.20.255.63 |
| 126 | 10.20.255.64/26 | 10.20.255.65 – 10.20.255.126 | 10.20.255.127 |
| 127 | 10.20.255.128/26 | 10.20.255.129 – 10.20.255.190 | 10.20.255.191 |
| 128 | 10.20.255.192/26 | 10.20.255.193 – 10.20.255.254 | 10.20.255.255 |
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 /19 |
|---|---|---|---|---|
| /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 | - |
| /14 | 255.252.0.0 | 262,144 | 262,142 | - |
| /15 | 255.254.0.0 | 131,072 | 131,070 | - |
| /16 | 255.255.0.0 | 65,536 | 65,534 | - |
| /17 | 255.255.128.0 | 32,768 | 32,766 | - |
| /18 | 255.255.192.0 | 16,384 | 16,382 | - |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 1 |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 2 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 4 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 8 split → |
| /23 | 255.255.254.0 | 512 | 510 | 16 split → |
| /24 | 255.255.255.0 | 256 | 254 | 32 split → |
| /25 | 255.255.255.128 | 128 | 126 | 64 split → |
| /26 | 255.255.255.192 | 64 | 62 | 128 split → |
| /27 | 255.255.255.224 | 32 | 30 | 256 split → |
| /28 | 255.255.255.240 | 16 | 14 | 512 split → |
| /29 | 255.255.255.248 | 8 | 6 | 1,024 split → |
| /30 | 255.255.255.252 | 4 | 2 | 2,048 split → |
| /31 | 255.255.255.254 | 2 | 2 | 4,096 split → |
| /32 | 255.255.255.255 | 1 | 1 | 8,192 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.