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)10.45.48.0/20
network10.45.48.0/20
broadcast10.45.63.255
first host10.45.48.1
last host10.45.63.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.45.48.0/20
address00001010.00101101.00110000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00101101.00110000.00000000
broadcast00001010.00101101.00111111.11111111
green = network part, grey = host part
hex0x0a2d3000
decimal170733568
reverse dns0.48.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:3000
/20 split into /27 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.45.48.0/27 | 10.45.48.1 – 10.45.48.30 | 10.45.48.31 |
| 2 | 10.45.48.32/27 | 10.45.48.33 – 10.45.48.62 | 10.45.48.63 |
| 3 | 10.45.48.64/27 | 10.45.48.65 – 10.45.48.94 | 10.45.48.95 |
| 4 | 10.45.48.96/27 | 10.45.48.97 – 10.45.48.126 | 10.45.48.127 |
| 5 | 10.45.48.128/27 | 10.45.48.129 – 10.45.48.158 | 10.45.48.159 |
| 6 | 10.45.48.160/27 | 10.45.48.161 – 10.45.48.190 | 10.45.48.191 |
| 7 | 10.45.48.192/27 | 10.45.48.193 – 10.45.48.222 | 10.45.48.223 |
| 8 | 10.45.48.224/27 | 10.45.48.225 – 10.45.48.254 | 10.45.48.255 |
| 9 | 10.45.49.0/27 | 10.45.49.1 – 10.45.49.30 | 10.45.49.31 |
| 10 | 10.45.49.32/27 | 10.45.49.33 – 10.45.49.62 | 10.45.49.63 |
| 11 | 10.45.49.64/27 | 10.45.49.65 – 10.45.49.94 | 10.45.49.95 |
| 12 | 10.45.49.96/27 | 10.45.49.97 – 10.45.49.126 | 10.45.49.127 |
| 13 | 10.45.49.128/27 | 10.45.49.129 – 10.45.49.158 | 10.45.49.159 |
| 14 | 10.45.49.160/27 | 10.45.49.161 – 10.45.49.190 | 10.45.49.191 |
| 15 | 10.45.49.192/27 | 10.45.49.193 – 10.45.49.222 | 10.45.49.223 |
| 16 | 10.45.49.224/27 | 10.45.49.225 – 10.45.49.254 | 10.45.49.255 |
| 17 | 10.45.50.0/27 | 10.45.50.1 – 10.45.50.30 | 10.45.50.31 |
| 18 | 10.45.50.32/27 | 10.45.50.33 – 10.45.50.62 | 10.45.50.63 |
| 19 | 10.45.50.64/27 | 10.45.50.65 – 10.45.50.94 | 10.45.50.95 |
| 20 | 10.45.50.96/27 | 10.45.50.97 – 10.45.50.126 | 10.45.50.127 |
| 21 | 10.45.50.128/27 | 10.45.50.129 – 10.45.50.158 | 10.45.50.159 |
| 22 | 10.45.50.160/27 | 10.45.50.161 – 10.45.50.190 | 10.45.50.191 |
| 23 | 10.45.50.192/27 | 10.45.50.193 – 10.45.50.222 | 10.45.50.223 |
| 24 | 10.45.50.224/27 | 10.45.50.225 – 10.45.50.254 | 10.45.50.255 |
| 25 | 10.45.51.0/27 | 10.45.51.1 – 10.45.51.30 | 10.45.51.31 |
| 26 | 10.45.51.32/27 | 10.45.51.33 – 10.45.51.62 | 10.45.51.63 |
| 27 | 10.45.51.64/27 | 10.45.51.65 – 10.45.51.94 | 10.45.51.95 |
| 28 | 10.45.51.96/27 | 10.45.51.97 – 10.45.51.126 | 10.45.51.127 |
| 29 | 10.45.51.128/27 | 10.45.51.129 – 10.45.51.158 | 10.45.51.159 |
| 30 | 10.45.51.160/27 | 10.45.51.161 – 10.45.51.190 | 10.45.51.191 |
| 31 | 10.45.51.192/27 | 10.45.51.193 – 10.45.51.222 | 10.45.51.223 |
| 32 | 10.45.51.224/27 | 10.45.51.225 – 10.45.51.254 | 10.45.51.255 |
| 33 | 10.45.52.0/27 | 10.45.52.1 – 10.45.52.30 | 10.45.52.31 |
| 34 | 10.45.52.32/27 | 10.45.52.33 – 10.45.52.62 | 10.45.52.63 |
| 35 | 10.45.52.64/27 | 10.45.52.65 – 10.45.52.94 | 10.45.52.95 |
| 36 | 10.45.52.96/27 | 10.45.52.97 – 10.45.52.126 | 10.45.52.127 |
| 37 | 10.45.52.128/27 | 10.45.52.129 – 10.45.52.158 | 10.45.52.159 |
| 38 | 10.45.52.160/27 | 10.45.52.161 – 10.45.52.190 | 10.45.52.191 |
| 39 | 10.45.52.192/27 | 10.45.52.193 – 10.45.52.222 | 10.45.52.223 |
| 40 | 10.45.52.224/27 | 10.45.52.225 – 10.45.52.254 | 10.45.52.255 |
| 41 | 10.45.53.0/27 | 10.45.53.1 – 10.45.53.30 | 10.45.53.31 |
| 42 | 10.45.53.32/27 | 10.45.53.33 – 10.45.53.62 | 10.45.53.63 |
| 43 | 10.45.53.64/27 | 10.45.53.65 – 10.45.53.94 | 10.45.53.95 |
| 44 | 10.45.53.96/27 | 10.45.53.97 – 10.45.53.126 | 10.45.53.127 |
| 45 | 10.45.53.128/27 | 10.45.53.129 – 10.45.53.158 | 10.45.53.159 |
| 46 | 10.45.53.160/27 | 10.45.53.161 – 10.45.53.190 | 10.45.53.191 |
| 47 | 10.45.53.192/27 | 10.45.53.193 – 10.45.53.222 | 10.45.53.223 |
| 48 | 10.45.53.224/27 | 10.45.53.225 – 10.45.53.254 | 10.45.53.255 |
| 49 | 10.45.54.0/27 | 10.45.54.1 – 10.45.54.30 | 10.45.54.31 |
| 50 | 10.45.54.32/27 | 10.45.54.33 – 10.45.54.62 | 10.45.54.63 |
| 51 | 10.45.54.64/27 | 10.45.54.65 – 10.45.54.94 | 10.45.54.95 |
| 52 | 10.45.54.96/27 | 10.45.54.97 – 10.45.54.126 | 10.45.54.127 |
| 53 | 10.45.54.128/27 | 10.45.54.129 – 10.45.54.158 | 10.45.54.159 |
| 54 | 10.45.54.160/27 | 10.45.54.161 – 10.45.54.190 | 10.45.54.191 |
| 55 | 10.45.54.192/27 | 10.45.54.193 – 10.45.54.222 | 10.45.54.223 |
| 56 | 10.45.54.224/27 | 10.45.54.225 – 10.45.54.254 | 10.45.54.255 |
| 57 | 10.45.55.0/27 | 10.45.55.1 – 10.45.55.30 | 10.45.55.31 |
| 58 | 10.45.55.32/27 | 10.45.55.33 – 10.45.55.62 | 10.45.55.63 |
| 59 | 10.45.55.64/27 | 10.45.55.65 – 10.45.55.94 | 10.45.55.95 |
| 60 | 10.45.55.96/27 | 10.45.55.97 – 10.45.55.126 | 10.45.55.127 |
| 61 | 10.45.55.128/27 | 10.45.55.129 – 10.45.55.158 | 10.45.55.159 |
| 62 | 10.45.55.160/27 | 10.45.55.161 – 10.45.55.190 | 10.45.55.191 |
| 63 | 10.45.55.192/27 | 10.45.55.193 – 10.45.55.222 | 10.45.55.223 |
| 64 | 10.45.55.224/27 | 10.45.55.225 – 10.45.55.254 | 10.45.55.255 |
| 65 | 10.45.56.0/27 | 10.45.56.1 – 10.45.56.30 | 10.45.56.31 |
| 66 | 10.45.56.32/27 | 10.45.56.33 – 10.45.56.62 | 10.45.56.63 |
| 67 | 10.45.56.64/27 | 10.45.56.65 – 10.45.56.94 | 10.45.56.95 |
| 68 | 10.45.56.96/27 | 10.45.56.97 – 10.45.56.126 | 10.45.56.127 |
| 69 | 10.45.56.128/27 | 10.45.56.129 – 10.45.56.158 | 10.45.56.159 |
| 70 | 10.45.56.160/27 | 10.45.56.161 – 10.45.56.190 | 10.45.56.191 |
| 71 | 10.45.56.192/27 | 10.45.56.193 – 10.45.56.222 | 10.45.56.223 |
| 72 | 10.45.56.224/27 | 10.45.56.225 – 10.45.56.254 | 10.45.56.255 |
| 73 | 10.45.57.0/27 | 10.45.57.1 – 10.45.57.30 | 10.45.57.31 |
| 74 | 10.45.57.32/27 | 10.45.57.33 – 10.45.57.62 | 10.45.57.63 |
| 75 | 10.45.57.64/27 | 10.45.57.65 – 10.45.57.94 | 10.45.57.95 |
| 76 | 10.45.57.96/27 | 10.45.57.97 – 10.45.57.126 | 10.45.57.127 |
| 77 | 10.45.57.128/27 | 10.45.57.129 – 10.45.57.158 | 10.45.57.159 |
| 78 | 10.45.57.160/27 | 10.45.57.161 – 10.45.57.190 | 10.45.57.191 |
| 79 | 10.45.57.192/27 | 10.45.57.193 – 10.45.57.222 | 10.45.57.223 |
| 80 | 10.45.57.224/27 | 10.45.57.225 – 10.45.57.254 | 10.45.57.255 |
| 81 | 10.45.58.0/27 | 10.45.58.1 – 10.45.58.30 | 10.45.58.31 |
| 82 | 10.45.58.32/27 | 10.45.58.33 – 10.45.58.62 | 10.45.58.63 |
| 83 | 10.45.58.64/27 | 10.45.58.65 – 10.45.58.94 | 10.45.58.95 |
| 84 | 10.45.58.96/27 | 10.45.58.97 – 10.45.58.126 | 10.45.58.127 |
| 85 | 10.45.58.128/27 | 10.45.58.129 – 10.45.58.158 | 10.45.58.159 |
| 86 | 10.45.58.160/27 | 10.45.58.161 – 10.45.58.190 | 10.45.58.191 |
| 87 | 10.45.58.192/27 | 10.45.58.193 – 10.45.58.222 | 10.45.58.223 |
| 88 | 10.45.58.224/27 | 10.45.58.225 – 10.45.58.254 | 10.45.58.255 |
| 89 | 10.45.59.0/27 | 10.45.59.1 – 10.45.59.30 | 10.45.59.31 |
| 90 | 10.45.59.32/27 | 10.45.59.33 – 10.45.59.62 | 10.45.59.63 |
| 91 | 10.45.59.64/27 | 10.45.59.65 – 10.45.59.94 | 10.45.59.95 |
| 92 | 10.45.59.96/27 | 10.45.59.97 – 10.45.59.126 | 10.45.59.127 |
| 93 | 10.45.59.128/27 | 10.45.59.129 – 10.45.59.158 | 10.45.59.159 |
| 94 | 10.45.59.160/27 | 10.45.59.161 – 10.45.59.190 | 10.45.59.191 |
| 95 | 10.45.59.192/27 | 10.45.59.193 – 10.45.59.222 | 10.45.59.223 |
| 96 | 10.45.59.224/27 | 10.45.59.225 – 10.45.59.254 | 10.45.59.255 |
| 97 | 10.45.60.0/27 | 10.45.60.1 – 10.45.60.30 | 10.45.60.31 |
| 98 | 10.45.60.32/27 | 10.45.60.33 – 10.45.60.62 | 10.45.60.63 |
| 99 | 10.45.60.64/27 | 10.45.60.65 – 10.45.60.94 | 10.45.60.95 |
| 100 | 10.45.60.96/27 | 10.45.60.97 – 10.45.60.126 | 10.45.60.127 |
| 101 | 10.45.60.128/27 | 10.45.60.129 – 10.45.60.158 | 10.45.60.159 |
| 102 | 10.45.60.160/27 | 10.45.60.161 – 10.45.60.190 | 10.45.60.191 |
| 103 | 10.45.60.192/27 | 10.45.60.193 – 10.45.60.222 | 10.45.60.223 |
| 104 | 10.45.60.224/27 | 10.45.60.225 – 10.45.60.254 | 10.45.60.255 |
| 105 | 10.45.61.0/27 | 10.45.61.1 – 10.45.61.30 | 10.45.61.31 |
| 106 | 10.45.61.32/27 | 10.45.61.33 – 10.45.61.62 | 10.45.61.63 |
| 107 | 10.45.61.64/27 | 10.45.61.65 – 10.45.61.94 | 10.45.61.95 |
| 108 | 10.45.61.96/27 | 10.45.61.97 – 10.45.61.126 | 10.45.61.127 |
| 109 | 10.45.61.128/27 | 10.45.61.129 – 10.45.61.158 | 10.45.61.159 |
| 110 | 10.45.61.160/27 | 10.45.61.161 – 10.45.61.190 | 10.45.61.191 |
| 111 | 10.45.61.192/27 | 10.45.61.193 – 10.45.61.222 | 10.45.61.223 |
| 112 | 10.45.61.224/27 | 10.45.61.225 – 10.45.61.254 | 10.45.61.255 |
| 113 | 10.45.62.0/27 | 10.45.62.1 – 10.45.62.30 | 10.45.62.31 |
| 114 | 10.45.62.32/27 | 10.45.62.33 – 10.45.62.62 | 10.45.62.63 |
| 115 | 10.45.62.64/27 | 10.45.62.65 – 10.45.62.94 | 10.45.62.95 |
| 116 | 10.45.62.96/27 | 10.45.62.97 – 10.45.62.126 | 10.45.62.127 |
| 117 | 10.45.62.128/27 | 10.45.62.129 – 10.45.62.158 | 10.45.62.159 |
| 118 | 10.45.62.160/27 | 10.45.62.161 – 10.45.62.190 | 10.45.62.191 |
| 119 | 10.45.62.192/27 | 10.45.62.193 – 10.45.62.222 | 10.45.62.223 |
| 120 | 10.45.62.224/27 | 10.45.62.225 – 10.45.62.254 | 10.45.62.255 |
| 121 | 10.45.63.0/27 | 10.45.63.1 – 10.45.63.30 | 10.45.63.31 |
| 122 | 10.45.63.32/27 | 10.45.63.33 – 10.45.63.62 | 10.45.63.63 |
| 123 | 10.45.63.64/27 | 10.45.63.65 – 10.45.63.94 | 10.45.63.95 |
| 124 | 10.45.63.96/27 | 10.45.63.97 – 10.45.63.126 | 10.45.63.127 |
| 125 | 10.45.63.128/27 | 10.45.63.129 – 10.45.63.158 | 10.45.63.159 |
| 126 | 10.45.63.160/27 | 10.45.63.161 – 10.45.63.190 | 10.45.63.191 |
| 127 | 10.45.63.192/27 | 10.45.63.193 – 10.45.63.222 | 10.45.63.223 |
| 128 | 10.45.63.224/27 | 10.45.63.225 – 10.45.63.254 | 10.45.63.255 |
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.