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)10.26.64.0/20
network10.26.64.0/20
broadcast10.26.79.255
first host10.26.64.1
last host10.26.79.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.26.64.0/20
address00001010.00011010.01000000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00011010.01000000.00000000
broadcast00001010.00011010.01001111.11111111
green = network part, grey = host part
hex0x0a1a4000
decimal169492480
reverse dns0.64.26.10.in-addr.arpa
ipv4-mapped::ffff:a1a:4000
/20 split into /27 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.26.64.0/27 | 10.26.64.1 – 10.26.64.30 | 10.26.64.31 |
| 2 | 10.26.64.32/27 | 10.26.64.33 – 10.26.64.62 | 10.26.64.63 |
| 3 | 10.26.64.64/27 | 10.26.64.65 – 10.26.64.94 | 10.26.64.95 |
| 4 | 10.26.64.96/27 | 10.26.64.97 – 10.26.64.126 | 10.26.64.127 |
| 5 | 10.26.64.128/27 | 10.26.64.129 – 10.26.64.158 | 10.26.64.159 |
| 6 | 10.26.64.160/27 | 10.26.64.161 – 10.26.64.190 | 10.26.64.191 |
| 7 | 10.26.64.192/27 | 10.26.64.193 – 10.26.64.222 | 10.26.64.223 |
| 8 | 10.26.64.224/27 | 10.26.64.225 – 10.26.64.254 | 10.26.64.255 |
| 9 | 10.26.65.0/27 | 10.26.65.1 – 10.26.65.30 | 10.26.65.31 |
| 10 | 10.26.65.32/27 | 10.26.65.33 – 10.26.65.62 | 10.26.65.63 |
| 11 | 10.26.65.64/27 | 10.26.65.65 – 10.26.65.94 | 10.26.65.95 |
| 12 | 10.26.65.96/27 | 10.26.65.97 – 10.26.65.126 | 10.26.65.127 |
| 13 | 10.26.65.128/27 | 10.26.65.129 – 10.26.65.158 | 10.26.65.159 |
| 14 | 10.26.65.160/27 | 10.26.65.161 – 10.26.65.190 | 10.26.65.191 |
| 15 | 10.26.65.192/27 | 10.26.65.193 – 10.26.65.222 | 10.26.65.223 |
| 16 | 10.26.65.224/27 | 10.26.65.225 – 10.26.65.254 | 10.26.65.255 |
| 17 | 10.26.66.0/27 | 10.26.66.1 – 10.26.66.30 | 10.26.66.31 |
| 18 | 10.26.66.32/27 | 10.26.66.33 – 10.26.66.62 | 10.26.66.63 |
| 19 | 10.26.66.64/27 | 10.26.66.65 – 10.26.66.94 | 10.26.66.95 |
| 20 | 10.26.66.96/27 | 10.26.66.97 – 10.26.66.126 | 10.26.66.127 |
| 21 | 10.26.66.128/27 | 10.26.66.129 – 10.26.66.158 | 10.26.66.159 |
| 22 | 10.26.66.160/27 | 10.26.66.161 – 10.26.66.190 | 10.26.66.191 |
| 23 | 10.26.66.192/27 | 10.26.66.193 – 10.26.66.222 | 10.26.66.223 |
| 24 | 10.26.66.224/27 | 10.26.66.225 – 10.26.66.254 | 10.26.66.255 |
| 25 | 10.26.67.0/27 | 10.26.67.1 – 10.26.67.30 | 10.26.67.31 |
| 26 | 10.26.67.32/27 | 10.26.67.33 – 10.26.67.62 | 10.26.67.63 |
| 27 | 10.26.67.64/27 | 10.26.67.65 – 10.26.67.94 | 10.26.67.95 |
| 28 | 10.26.67.96/27 | 10.26.67.97 – 10.26.67.126 | 10.26.67.127 |
| 29 | 10.26.67.128/27 | 10.26.67.129 – 10.26.67.158 | 10.26.67.159 |
| 30 | 10.26.67.160/27 | 10.26.67.161 – 10.26.67.190 | 10.26.67.191 |
| 31 | 10.26.67.192/27 | 10.26.67.193 – 10.26.67.222 | 10.26.67.223 |
| 32 | 10.26.67.224/27 | 10.26.67.225 – 10.26.67.254 | 10.26.67.255 |
| 33 | 10.26.68.0/27 | 10.26.68.1 – 10.26.68.30 | 10.26.68.31 |
| 34 | 10.26.68.32/27 | 10.26.68.33 – 10.26.68.62 | 10.26.68.63 |
| 35 | 10.26.68.64/27 | 10.26.68.65 – 10.26.68.94 | 10.26.68.95 |
| 36 | 10.26.68.96/27 | 10.26.68.97 – 10.26.68.126 | 10.26.68.127 |
| 37 | 10.26.68.128/27 | 10.26.68.129 – 10.26.68.158 | 10.26.68.159 |
| 38 | 10.26.68.160/27 | 10.26.68.161 – 10.26.68.190 | 10.26.68.191 |
| 39 | 10.26.68.192/27 | 10.26.68.193 – 10.26.68.222 | 10.26.68.223 |
| 40 | 10.26.68.224/27 | 10.26.68.225 – 10.26.68.254 | 10.26.68.255 |
| 41 | 10.26.69.0/27 | 10.26.69.1 – 10.26.69.30 | 10.26.69.31 |
| 42 | 10.26.69.32/27 | 10.26.69.33 – 10.26.69.62 | 10.26.69.63 |
| 43 | 10.26.69.64/27 | 10.26.69.65 – 10.26.69.94 | 10.26.69.95 |
| 44 | 10.26.69.96/27 | 10.26.69.97 – 10.26.69.126 | 10.26.69.127 |
| 45 | 10.26.69.128/27 | 10.26.69.129 – 10.26.69.158 | 10.26.69.159 |
| 46 | 10.26.69.160/27 | 10.26.69.161 – 10.26.69.190 | 10.26.69.191 |
| 47 | 10.26.69.192/27 | 10.26.69.193 – 10.26.69.222 | 10.26.69.223 |
| 48 | 10.26.69.224/27 | 10.26.69.225 – 10.26.69.254 | 10.26.69.255 |
| 49 | 10.26.70.0/27 | 10.26.70.1 – 10.26.70.30 | 10.26.70.31 |
| 50 | 10.26.70.32/27 | 10.26.70.33 – 10.26.70.62 | 10.26.70.63 |
| 51 | 10.26.70.64/27 | 10.26.70.65 – 10.26.70.94 | 10.26.70.95 |
| 52 | 10.26.70.96/27 | 10.26.70.97 – 10.26.70.126 | 10.26.70.127 |
| 53 | 10.26.70.128/27 | 10.26.70.129 – 10.26.70.158 | 10.26.70.159 |
| 54 | 10.26.70.160/27 | 10.26.70.161 – 10.26.70.190 | 10.26.70.191 |
| 55 | 10.26.70.192/27 | 10.26.70.193 – 10.26.70.222 | 10.26.70.223 |
| 56 | 10.26.70.224/27 | 10.26.70.225 – 10.26.70.254 | 10.26.70.255 |
| 57 | 10.26.71.0/27 | 10.26.71.1 – 10.26.71.30 | 10.26.71.31 |
| 58 | 10.26.71.32/27 | 10.26.71.33 – 10.26.71.62 | 10.26.71.63 |
| 59 | 10.26.71.64/27 | 10.26.71.65 – 10.26.71.94 | 10.26.71.95 |
| 60 | 10.26.71.96/27 | 10.26.71.97 – 10.26.71.126 | 10.26.71.127 |
| 61 | 10.26.71.128/27 | 10.26.71.129 – 10.26.71.158 | 10.26.71.159 |
| 62 | 10.26.71.160/27 | 10.26.71.161 – 10.26.71.190 | 10.26.71.191 |
| 63 | 10.26.71.192/27 | 10.26.71.193 – 10.26.71.222 | 10.26.71.223 |
| 64 | 10.26.71.224/27 | 10.26.71.225 – 10.26.71.254 | 10.26.71.255 |
| 65 | 10.26.72.0/27 | 10.26.72.1 – 10.26.72.30 | 10.26.72.31 |
| 66 | 10.26.72.32/27 | 10.26.72.33 – 10.26.72.62 | 10.26.72.63 |
| 67 | 10.26.72.64/27 | 10.26.72.65 – 10.26.72.94 | 10.26.72.95 |
| 68 | 10.26.72.96/27 | 10.26.72.97 – 10.26.72.126 | 10.26.72.127 |
| 69 | 10.26.72.128/27 | 10.26.72.129 – 10.26.72.158 | 10.26.72.159 |
| 70 | 10.26.72.160/27 | 10.26.72.161 – 10.26.72.190 | 10.26.72.191 |
| 71 | 10.26.72.192/27 | 10.26.72.193 – 10.26.72.222 | 10.26.72.223 |
| 72 | 10.26.72.224/27 | 10.26.72.225 – 10.26.72.254 | 10.26.72.255 |
| 73 | 10.26.73.0/27 | 10.26.73.1 – 10.26.73.30 | 10.26.73.31 |
| 74 | 10.26.73.32/27 | 10.26.73.33 – 10.26.73.62 | 10.26.73.63 |
| 75 | 10.26.73.64/27 | 10.26.73.65 – 10.26.73.94 | 10.26.73.95 |
| 76 | 10.26.73.96/27 | 10.26.73.97 – 10.26.73.126 | 10.26.73.127 |
| 77 | 10.26.73.128/27 | 10.26.73.129 – 10.26.73.158 | 10.26.73.159 |
| 78 | 10.26.73.160/27 | 10.26.73.161 – 10.26.73.190 | 10.26.73.191 |
| 79 | 10.26.73.192/27 | 10.26.73.193 – 10.26.73.222 | 10.26.73.223 |
| 80 | 10.26.73.224/27 | 10.26.73.225 – 10.26.73.254 | 10.26.73.255 |
| 81 | 10.26.74.0/27 | 10.26.74.1 – 10.26.74.30 | 10.26.74.31 |
| 82 | 10.26.74.32/27 | 10.26.74.33 – 10.26.74.62 | 10.26.74.63 |
| 83 | 10.26.74.64/27 | 10.26.74.65 – 10.26.74.94 | 10.26.74.95 |
| 84 | 10.26.74.96/27 | 10.26.74.97 – 10.26.74.126 | 10.26.74.127 |
| 85 | 10.26.74.128/27 | 10.26.74.129 – 10.26.74.158 | 10.26.74.159 |
| 86 | 10.26.74.160/27 | 10.26.74.161 – 10.26.74.190 | 10.26.74.191 |
| 87 | 10.26.74.192/27 | 10.26.74.193 – 10.26.74.222 | 10.26.74.223 |
| 88 | 10.26.74.224/27 | 10.26.74.225 – 10.26.74.254 | 10.26.74.255 |
| 89 | 10.26.75.0/27 | 10.26.75.1 – 10.26.75.30 | 10.26.75.31 |
| 90 | 10.26.75.32/27 | 10.26.75.33 – 10.26.75.62 | 10.26.75.63 |
| 91 | 10.26.75.64/27 | 10.26.75.65 – 10.26.75.94 | 10.26.75.95 |
| 92 | 10.26.75.96/27 | 10.26.75.97 – 10.26.75.126 | 10.26.75.127 |
| 93 | 10.26.75.128/27 | 10.26.75.129 – 10.26.75.158 | 10.26.75.159 |
| 94 | 10.26.75.160/27 | 10.26.75.161 – 10.26.75.190 | 10.26.75.191 |
| 95 | 10.26.75.192/27 | 10.26.75.193 – 10.26.75.222 | 10.26.75.223 |
| 96 | 10.26.75.224/27 | 10.26.75.225 – 10.26.75.254 | 10.26.75.255 |
| 97 | 10.26.76.0/27 | 10.26.76.1 – 10.26.76.30 | 10.26.76.31 |
| 98 | 10.26.76.32/27 | 10.26.76.33 – 10.26.76.62 | 10.26.76.63 |
| 99 | 10.26.76.64/27 | 10.26.76.65 – 10.26.76.94 | 10.26.76.95 |
| 100 | 10.26.76.96/27 | 10.26.76.97 – 10.26.76.126 | 10.26.76.127 |
| 101 | 10.26.76.128/27 | 10.26.76.129 – 10.26.76.158 | 10.26.76.159 |
| 102 | 10.26.76.160/27 | 10.26.76.161 – 10.26.76.190 | 10.26.76.191 |
| 103 | 10.26.76.192/27 | 10.26.76.193 – 10.26.76.222 | 10.26.76.223 |
| 104 | 10.26.76.224/27 | 10.26.76.225 – 10.26.76.254 | 10.26.76.255 |
| 105 | 10.26.77.0/27 | 10.26.77.1 – 10.26.77.30 | 10.26.77.31 |
| 106 | 10.26.77.32/27 | 10.26.77.33 – 10.26.77.62 | 10.26.77.63 |
| 107 | 10.26.77.64/27 | 10.26.77.65 – 10.26.77.94 | 10.26.77.95 |
| 108 | 10.26.77.96/27 | 10.26.77.97 – 10.26.77.126 | 10.26.77.127 |
| 109 | 10.26.77.128/27 | 10.26.77.129 – 10.26.77.158 | 10.26.77.159 |
| 110 | 10.26.77.160/27 | 10.26.77.161 – 10.26.77.190 | 10.26.77.191 |
| 111 | 10.26.77.192/27 | 10.26.77.193 – 10.26.77.222 | 10.26.77.223 |
| 112 | 10.26.77.224/27 | 10.26.77.225 – 10.26.77.254 | 10.26.77.255 |
| 113 | 10.26.78.0/27 | 10.26.78.1 – 10.26.78.30 | 10.26.78.31 |
| 114 | 10.26.78.32/27 | 10.26.78.33 – 10.26.78.62 | 10.26.78.63 |
| 115 | 10.26.78.64/27 | 10.26.78.65 – 10.26.78.94 | 10.26.78.95 |
| 116 | 10.26.78.96/27 | 10.26.78.97 – 10.26.78.126 | 10.26.78.127 |
| 117 | 10.26.78.128/27 | 10.26.78.129 – 10.26.78.158 | 10.26.78.159 |
| 118 | 10.26.78.160/27 | 10.26.78.161 – 10.26.78.190 | 10.26.78.191 |
| 119 | 10.26.78.192/27 | 10.26.78.193 – 10.26.78.222 | 10.26.78.223 |
| 120 | 10.26.78.224/27 | 10.26.78.225 – 10.26.78.254 | 10.26.78.255 |
| 121 | 10.26.79.0/27 | 10.26.79.1 – 10.26.79.30 | 10.26.79.31 |
| 122 | 10.26.79.32/27 | 10.26.79.33 – 10.26.79.62 | 10.26.79.63 |
| 123 | 10.26.79.64/27 | 10.26.79.65 – 10.26.79.94 | 10.26.79.95 |
| 124 | 10.26.79.96/27 | 10.26.79.97 – 10.26.79.126 | 10.26.79.127 |
| 125 | 10.26.79.128/27 | 10.26.79.129 – 10.26.79.158 | 10.26.79.159 |
| 126 | 10.26.79.160/27 | 10.26.79.161 – 10.26.79.190 | 10.26.79.191 |
| 127 | 10.26.79.192/27 | 10.26.79.193 – 10.26.79.222 | 10.26.79.223 |
| 128 | 10.26.79.224/27 | 10.26.79.225 – 10.26.79.254 | 10.26.79.255 |
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 /20 |
|---|---|---|---|---|
| /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 | - |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 1 |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 2 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 4 split → |
| /23 | 255.255.254.0 | 512 | 510 | 8 split → |
| /24 | 255.255.255.0 | 256 | 254 | 16 split → |
| /25 | 255.255.255.128 | 128 | 126 | 32 split → |
| /26 | 255.255.255.192 | 64 | 62 | 64 split → |
| /27 | 255.255.255.224 | 32 | 30 | 128 split → |
| /28 | 255.255.255.240 | 16 | 14 | 256 split → |
| /29 | 255.255.255.248 | 8 | 6 | 512 split → |
| /30 | 255.255.255.252 | 4 | 2 | 1,024 split → |
| /31 | 255.255.255.254 | 2 | 2 | 2,048 split → |
| /32 | 255.255.255.255 | 1 | 1 | 4,096 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.