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)10.30.192.0/19
network10.30.192.0/19
broadcast10.30.223.255
first host10.30.192.1
last host10.30.223.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.30.192.0/19
address00001010.00011110.11000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00011110.11000000.00000000
broadcast00001010.00011110.11011111.11111111
green = network part, grey = host part
hex0x0a1ec000
decimal169787392
reverse dns0.192.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:c000
/19 split into /26 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.30.192.0/26 | 10.30.192.1 – 10.30.192.62 | 10.30.192.63 |
| 2 | 10.30.192.64/26 | 10.30.192.65 – 10.30.192.126 | 10.30.192.127 |
| 3 | 10.30.192.128/26 | 10.30.192.129 – 10.30.192.190 | 10.30.192.191 |
| 4 | 10.30.192.192/26 | 10.30.192.193 – 10.30.192.254 | 10.30.192.255 |
| 5 | 10.30.193.0/26 | 10.30.193.1 – 10.30.193.62 | 10.30.193.63 |
| 6 | 10.30.193.64/26 | 10.30.193.65 – 10.30.193.126 | 10.30.193.127 |
| 7 | 10.30.193.128/26 | 10.30.193.129 – 10.30.193.190 | 10.30.193.191 |
| 8 | 10.30.193.192/26 | 10.30.193.193 – 10.30.193.254 | 10.30.193.255 |
| 9 | 10.30.194.0/26 | 10.30.194.1 – 10.30.194.62 | 10.30.194.63 |
| 10 | 10.30.194.64/26 | 10.30.194.65 – 10.30.194.126 | 10.30.194.127 |
| 11 | 10.30.194.128/26 | 10.30.194.129 – 10.30.194.190 | 10.30.194.191 |
| 12 | 10.30.194.192/26 | 10.30.194.193 – 10.30.194.254 | 10.30.194.255 |
| 13 | 10.30.195.0/26 | 10.30.195.1 – 10.30.195.62 | 10.30.195.63 |
| 14 | 10.30.195.64/26 | 10.30.195.65 – 10.30.195.126 | 10.30.195.127 |
| 15 | 10.30.195.128/26 | 10.30.195.129 – 10.30.195.190 | 10.30.195.191 |
| 16 | 10.30.195.192/26 | 10.30.195.193 – 10.30.195.254 | 10.30.195.255 |
| 17 | 10.30.196.0/26 | 10.30.196.1 – 10.30.196.62 | 10.30.196.63 |
| 18 | 10.30.196.64/26 | 10.30.196.65 – 10.30.196.126 | 10.30.196.127 |
| 19 | 10.30.196.128/26 | 10.30.196.129 – 10.30.196.190 | 10.30.196.191 |
| 20 | 10.30.196.192/26 | 10.30.196.193 – 10.30.196.254 | 10.30.196.255 |
| 21 | 10.30.197.0/26 | 10.30.197.1 – 10.30.197.62 | 10.30.197.63 |
| 22 | 10.30.197.64/26 | 10.30.197.65 – 10.30.197.126 | 10.30.197.127 |
| 23 | 10.30.197.128/26 | 10.30.197.129 – 10.30.197.190 | 10.30.197.191 |
| 24 | 10.30.197.192/26 | 10.30.197.193 – 10.30.197.254 | 10.30.197.255 |
| 25 | 10.30.198.0/26 | 10.30.198.1 – 10.30.198.62 | 10.30.198.63 |
| 26 | 10.30.198.64/26 | 10.30.198.65 – 10.30.198.126 | 10.30.198.127 |
| 27 | 10.30.198.128/26 | 10.30.198.129 – 10.30.198.190 | 10.30.198.191 |
| 28 | 10.30.198.192/26 | 10.30.198.193 – 10.30.198.254 | 10.30.198.255 |
| 29 | 10.30.199.0/26 | 10.30.199.1 – 10.30.199.62 | 10.30.199.63 |
| 30 | 10.30.199.64/26 | 10.30.199.65 – 10.30.199.126 | 10.30.199.127 |
| 31 | 10.30.199.128/26 | 10.30.199.129 – 10.30.199.190 | 10.30.199.191 |
| 32 | 10.30.199.192/26 | 10.30.199.193 – 10.30.199.254 | 10.30.199.255 |
| 33 | 10.30.200.0/26 | 10.30.200.1 – 10.30.200.62 | 10.30.200.63 |
| 34 | 10.30.200.64/26 | 10.30.200.65 – 10.30.200.126 | 10.30.200.127 |
| 35 | 10.30.200.128/26 | 10.30.200.129 – 10.30.200.190 | 10.30.200.191 |
| 36 | 10.30.200.192/26 | 10.30.200.193 – 10.30.200.254 | 10.30.200.255 |
| 37 | 10.30.201.0/26 | 10.30.201.1 – 10.30.201.62 | 10.30.201.63 |
| 38 | 10.30.201.64/26 | 10.30.201.65 – 10.30.201.126 | 10.30.201.127 |
| 39 | 10.30.201.128/26 | 10.30.201.129 – 10.30.201.190 | 10.30.201.191 |
| 40 | 10.30.201.192/26 | 10.30.201.193 – 10.30.201.254 | 10.30.201.255 |
| 41 | 10.30.202.0/26 | 10.30.202.1 – 10.30.202.62 | 10.30.202.63 |
| 42 | 10.30.202.64/26 | 10.30.202.65 – 10.30.202.126 | 10.30.202.127 |
| 43 | 10.30.202.128/26 | 10.30.202.129 – 10.30.202.190 | 10.30.202.191 |
| 44 | 10.30.202.192/26 | 10.30.202.193 – 10.30.202.254 | 10.30.202.255 |
| 45 | 10.30.203.0/26 | 10.30.203.1 – 10.30.203.62 | 10.30.203.63 |
| 46 | 10.30.203.64/26 | 10.30.203.65 – 10.30.203.126 | 10.30.203.127 |
| 47 | 10.30.203.128/26 | 10.30.203.129 – 10.30.203.190 | 10.30.203.191 |
| 48 | 10.30.203.192/26 | 10.30.203.193 – 10.30.203.254 | 10.30.203.255 |
| 49 | 10.30.204.0/26 | 10.30.204.1 – 10.30.204.62 | 10.30.204.63 |
| 50 | 10.30.204.64/26 | 10.30.204.65 – 10.30.204.126 | 10.30.204.127 |
| 51 | 10.30.204.128/26 | 10.30.204.129 – 10.30.204.190 | 10.30.204.191 |
| 52 | 10.30.204.192/26 | 10.30.204.193 – 10.30.204.254 | 10.30.204.255 |
| 53 | 10.30.205.0/26 | 10.30.205.1 – 10.30.205.62 | 10.30.205.63 |
| 54 | 10.30.205.64/26 | 10.30.205.65 – 10.30.205.126 | 10.30.205.127 |
| 55 | 10.30.205.128/26 | 10.30.205.129 – 10.30.205.190 | 10.30.205.191 |
| 56 | 10.30.205.192/26 | 10.30.205.193 – 10.30.205.254 | 10.30.205.255 |
| 57 | 10.30.206.0/26 | 10.30.206.1 – 10.30.206.62 | 10.30.206.63 |
| 58 | 10.30.206.64/26 | 10.30.206.65 – 10.30.206.126 | 10.30.206.127 |
| 59 | 10.30.206.128/26 | 10.30.206.129 – 10.30.206.190 | 10.30.206.191 |
| 60 | 10.30.206.192/26 | 10.30.206.193 – 10.30.206.254 | 10.30.206.255 |
| 61 | 10.30.207.0/26 | 10.30.207.1 – 10.30.207.62 | 10.30.207.63 |
| 62 | 10.30.207.64/26 | 10.30.207.65 – 10.30.207.126 | 10.30.207.127 |
| 63 | 10.30.207.128/26 | 10.30.207.129 – 10.30.207.190 | 10.30.207.191 |
| 64 | 10.30.207.192/26 | 10.30.207.193 – 10.30.207.254 | 10.30.207.255 |
| 65 | 10.30.208.0/26 | 10.30.208.1 – 10.30.208.62 | 10.30.208.63 |
| 66 | 10.30.208.64/26 | 10.30.208.65 – 10.30.208.126 | 10.30.208.127 |
| 67 | 10.30.208.128/26 | 10.30.208.129 – 10.30.208.190 | 10.30.208.191 |
| 68 | 10.30.208.192/26 | 10.30.208.193 – 10.30.208.254 | 10.30.208.255 |
| 69 | 10.30.209.0/26 | 10.30.209.1 – 10.30.209.62 | 10.30.209.63 |
| 70 | 10.30.209.64/26 | 10.30.209.65 – 10.30.209.126 | 10.30.209.127 |
| 71 | 10.30.209.128/26 | 10.30.209.129 – 10.30.209.190 | 10.30.209.191 |
| 72 | 10.30.209.192/26 | 10.30.209.193 – 10.30.209.254 | 10.30.209.255 |
| 73 | 10.30.210.0/26 | 10.30.210.1 – 10.30.210.62 | 10.30.210.63 |
| 74 | 10.30.210.64/26 | 10.30.210.65 – 10.30.210.126 | 10.30.210.127 |
| 75 | 10.30.210.128/26 | 10.30.210.129 – 10.30.210.190 | 10.30.210.191 |
| 76 | 10.30.210.192/26 | 10.30.210.193 – 10.30.210.254 | 10.30.210.255 |
| 77 | 10.30.211.0/26 | 10.30.211.1 – 10.30.211.62 | 10.30.211.63 |
| 78 | 10.30.211.64/26 | 10.30.211.65 – 10.30.211.126 | 10.30.211.127 |
| 79 | 10.30.211.128/26 | 10.30.211.129 – 10.30.211.190 | 10.30.211.191 |
| 80 | 10.30.211.192/26 | 10.30.211.193 – 10.30.211.254 | 10.30.211.255 |
| 81 | 10.30.212.0/26 | 10.30.212.1 – 10.30.212.62 | 10.30.212.63 |
| 82 | 10.30.212.64/26 | 10.30.212.65 – 10.30.212.126 | 10.30.212.127 |
| 83 | 10.30.212.128/26 | 10.30.212.129 – 10.30.212.190 | 10.30.212.191 |
| 84 | 10.30.212.192/26 | 10.30.212.193 – 10.30.212.254 | 10.30.212.255 |
| 85 | 10.30.213.0/26 | 10.30.213.1 – 10.30.213.62 | 10.30.213.63 |
| 86 | 10.30.213.64/26 | 10.30.213.65 – 10.30.213.126 | 10.30.213.127 |
| 87 | 10.30.213.128/26 | 10.30.213.129 – 10.30.213.190 | 10.30.213.191 |
| 88 | 10.30.213.192/26 | 10.30.213.193 – 10.30.213.254 | 10.30.213.255 |
| 89 | 10.30.214.0/26 | 10.30.214.1 – 10.30.214.62 | 10.30.214.63 |
| 90 | 10.30.214.64/26 | 10.30.214.65 – 10.30.214.126 | 10.30.214.127 |
| 91 | 10.30.214.128/26 | 10.30.214.129 – 10.30.214.190 | 10.30.214.191 |
| 92 | 10.30.214.192/26 | 10.30.214.193 – 10.30.214.254 | 10.30.214.255 |
| 93 | 10.30.215.0/26 | 10.30.215.1 – 10.30.215.62 | 10.30.215.63 |
| 94 | 10.30.215.64/26 | 10.30.215.65 – 10.30.215.126 | 10.30.215.127 |
| 95 | 10.30.215.128/26 | 10.30.215.129 – 10.30.215.190 | 10.30.215.191 |
| 96 | 10.30.215.192/26 | 10.30.215.193 – 10.30.215.254 | 10.30.215.255 |
| 97 | 10.30.216.0/26 | 10.30.216.1 – 10.30.216.62 | 10.30.216.63 |
| 98 | 10.30.216.64/26 | 10.30.216.65 – 10.30.216.126 | 10.30.216.127 |
| 99 | 10.30.216.128/26 | 10.30.216.129 – 10.30.216.190 | 10.30.216.191 |
| 100 | 10.30.216.192/26 | 10.30.216.193 – 10.30.216.254 | 10.30.216.255 |
| 101 | 10.30.217.0/26 | 10.30.217.1 – 10.30.217.62 | 10.30.217.63 |
| 102 | 10.30.217.64/26 | 10.30.217.65 – 10.30.217.126 | 10.30.217.127 |
| 103 | 10.30.217.128/26 | 10.30.217.129 – 10.30.217.190 | 10.30.217.191 |
| 104 | 10.30.217.192/26 | 10.30.217.193 – 10.30.217.254 | 10.30.217.255 |
| 105 | 10.30.218.0/26 | 10.30.218.1 – 10.30.218.62 | 10.30.218.63 |
| 106 | 10.30.218.64/26 | 10.30.218.65 – 10.30.218.126 | 10.30.218.127 |
| 107 | 10.30.218.128/26 | 10.30.218.129 – 10.30.218.190 | 10.30.218.191 |
| 108 | 10.30.218.192/26 | 10.30.218.193 – 10.30.218.254 | 10.30.218.255 |
| 109 | 10.30.219.0/26 | 10.30.219.1 – 10.30.219.62 | 10.30.219.63 |
| 110 | 10.30.219.64/26 | 10.30.219.65 – 10.30.219.126 | 10.30.219.127 |
| 111 | 10.30.219.128/26 | 10.30.219.129 – 10.30.219.190 | 10.30.219.191 |
| 112 | 10.30.219.192/26 | 10.30.219.193 – 10.30.219.254 | 10.30.219.255 |
| 113 | 10.30.220.0/26 | 10.30.220.1 – 10.30.220.62 | 10.30.220.63 |
| 114 | 10.30.220.64/26 | 10.30.220.65 – 10.30.220.126 | 10.30.220.127 |
| 115 | 10.30.220.128/26 | 10.30.220.129 – 10.30.220.190 | 10.30.220.191 |
| 116 | 10.30.220.192/26 | 10.30.220.193 – 10.30.220.254 | 10.30.220.255 |
| 117 | 10.30.221.0/26 | 10.30.221.1 – 10.30.221.62 | 10.30.221.63 |
| 118 | 10.30.221.64/26 | 10.30.221.65 – 10.30.221.126 | 10.30.221.127 |
| 119 | 10.30.221.128/26 | 10.30.221.129 – 10.30.221.190 | 10.30.221.191 |
| 120 | 10.30.221.192/26 | 10.30.221.193 – 10.30.221.254 | 10.30.221.255 |
| 121 | 10.30.222.0/26 | 10.30.222.1 – 10.30.222.62 | 10.30.222.63 |
| 122 | 10.30.222.64/26 | 10.30.222.65 – 10.30.222.126 | 10.30.222.127 |
| 123 | 10.30.222.128/26 | 10.30.222.129 – 10.30.222.190 | 10.30.222.191 |
| 124 | 10.30.222.192/26 | 10.30.222.193 – 10.30.222.254 | 10.30.222.255 |
| 125 | 10.30.223.0/26 | 10.30.223.1 – 10.30.223.62 | 10.30.223.63 |
| 126 | 10.30.223.64/26 | 10.30.223.65 – 10.30.223.126 | 10.30.223.127 |
| 127 | 10.30.223.128/26 | 10.30.223.129 – 10.30.223.190 | 10.30.223.191 |
| 128 | 10.30.223.192/26 | 10.30.223.193 – 10.30.223.254 | 10.30.223.255 |
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.