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)10.192.0.0/12
network10.192.0.0/12
broadcast10.207.255.255
first host10.192.0.1
last host10.207.255.254
subnet mask255.240.0.0
wildcard0.15.255.255
addresses1,048,576
usable hosts1,048,574
classA
ipcalc 10.192.0.0/12
address00001010.11000000.00000000.00000000
subnet mask11111111.11110000.00000000.00000000
network00001010.11000000.00000000.00000000
broadcast00001010.11001111.11111111.11111111
green = network part, grey = host part
hex0x0ac00000
decimal180355072
reverse dns0.0.192.10.in-addr.arpa
ipv4-mapped::ffff:ac0:0
/12 split into /19 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.192.0.0/19 | 10.192.0.1 – 10.192.31.254 | 10.192.31.255 |
| 2 | 10.192.32.0/19 | 10.192.32.1 – 10.192.63.254 | 10.192.63.255 |
| 3 | 10.192.64.0/19 | 10.192.64.1 – 10.192.95.254 | 10.192.95.255 |
| 4 | 10.192.96.0/19 | 10.192.96.1 – 10.192.127.254 | 10.192.127.255 |
| 5 | 10.192.128.0/19 | 10.192.128.1 – 10.192.159.254 | 10.192.159.255 |
| 6 | 10.192.160.0/19 | 10.192.160.1 – 10.192.191.254 | 10.192.191.255 |
| 7 | 10.192.192.0/19 | 10.192.192.1 – 10.192.223.254 | 10.192.223.255 |
| 8 | 10.192.224.0/19 | 10.192.224.1 – 10.192.255.254 | 10.192.255.255 |
| 9 | 10.193.0.0/19 | 10.193.0.1 – 10.193.31.254 | 10.193.31.255 |
| 10 | 10.193.32.0/19 | 10.193.32.1 – 10.193.63.254 | 10.193.63.255 |
| 11 | 10.193.64.0/19 | 10.193.64.1 – 10.193.95.254 | 10.193.95.255 |
| 12 | 10.193.96.0/19 | 10.193.96.1 – 10.193.127.254 | 10.193.127.255 |
| 13 | 10.193.128.0/19 | 10.193.128.1 – 10.193.159.254 | 10.193.159.255 |
| 14 | 10.193.160.0/19 | 10.193.160.1 – 10.193.191.254 | 10.193.191.255 |
| 15 | 10.193.192.0/19 | 10.193.192.1 – 10.193.223.254 | 10.193.223.255 |
| 16 | 10.193.224.0/19 | 10.193.224.1 – 10.193.255.254 | 10.193.255.255 |
| 17 | 10.194.0.0/19 | 10.194.0.1 – 10.194.31.254 | 10.194.31.255 |
| 18 | 10.194.32.0/19 | 10.194.32.1 – 10.194.63.254 | 10.194.63.255 |
| 19 | 10.194.64.0/19 | 10.194.64.1 – 10.194.95.254 | 10.194.95.255 |
| 20 | 10.194.96.0/19 | 10.194.96.1 – 10.194.127.254 | 10.194.127.255 |
| 21 | 10.194.128.0/19 | 10.194.128.1 – 10.194.159.254 | 10.194.159.255 |
| 22 | 10.194.160.0/19 | 10.194.160.1 – 10.194.191.254 | 10.194.191.255 |
| 23 | 10.194.192.0/19 | 10.194.192.1 – 10.194.223.254 | 10.194.223.255 |
| 24 | 10.194.224.0/19 | 10.194.224.1 – 10.194.255.254 | 10.194.255.255 |
| 25 | 10.195.0.0/19 | 10.195.0.1 – 10.195.31.254 | 10.195.31.255 |
| 26 | 10.195.32.0/19 | 10.195.32.1 – 10.195.63.254 | 10.195.63.255 |
| 27 | 10.195.64.0/19 | 10.195.64.1 – 10.195.95.254 | 10.195.95.255 |
| 28 | 10.195.96.0/19 | 10.195.96.1 – 10.195.127.254 | 10.195.127.255 |
| 29 | 10.195.128.0/19 | 10.195.128.1 – 10.195.159.254 | 10.195.159.255 |
| 30 | 10.195.160.0/19 | 10.195.160.1 – 10.195.191.254 | 10.195.191.255 |
| 31 | 10.195.192.0/19 | 10.195.192.1 – 10.195.223.254 | 10.195.223.255 |
| 32 | 10.195.224.0/19 | 10.195.224.1 – 10.195.255.254 | 10.195.255.255 |
| 33 | 10.196.0.0/19 | 10.196.0.1 – 10.196.31.254 | 10.196.31.255 |
| 34 | 10.196.32.0/19 | 10.196.32.1 – 10.196.63.254 | 10.196.63.255 |
| 35 | 10.196.64.0/19 | 10.196.64.1 – 10.196.95.254 | 10.196.95.255 |
| 36 | 10.196.96.0/19 | 10.196.96.1 – 10.196.127.254 | 10.196.127.255 |
| 37 | 10.196.128.0/19 | 10.196.128.1 – 10.196.159.254 | 10.196.159.255 |
| 38 | 10.196.160.0/19 | 10.196.160.1 – 10.196.191.254 | 10.196.191.255 |
| 39 | 10.196.192.0/19 | 10.196.192.1 – 10.196.223.254 | 10.196.223.255 |
| 40 | 10.196.224.0/19 | 10.196.224.1 – 10.196.255.254 | 10.196.255.255 |
| 41 | 10.197.0.0/19 | 10.197.0.1 – 10.197.31.254 | 10.197.31.255 |
| 42 | 10.197.32.0/19 | 10.197.32.1 – 10.197.63.254 | 10.197.63.255 |
| 43 | 10.197.64.0/19 | 10.197.64.1 – 10.197.95.254 | 10.197.95.255 |
| 44 | 10.197.96.0/19 | 10.197.96.1 – 10.197.127.254 | 10.197.127.255 |
| 45 | 10.197.128.0/19 | 10.197.128.1 – 10.197.159.254 | 10.197.159.255 |
| 46 | 10.197.160.0/19 | 10.197.160.1 – 10.197.191.254 | 10.197.191.255 |
| 47 | 10.197.192.0/19 | 10.197.192.1 – 10.197.223.254 | 10.197.223.255 |
| 48 | 10.197.224.0/19 | 10.197.224.1 – 10.197.255.254 | 10.197.255.255 |
| 49 | 10.198.0.0/19 | 10.198.0.1 – 10.198.31.254 | 10.198.31.255 |
| 50 | 10.198.32.0/19 | 10.198.32.1 – 10.198.63.254 | 10.198.63.255 |
| 51 | 10.198.64.0/19 | 10.198.64.1 – 10.198.95.254 | 10.198.95.255 |
| 52 | 10.198.96.0/19 | 10.198.96.1 – 10.198.127.254 | 10.198.127.255 |
| 53 | 10.198.128.0/19 | 10.198.128.1 – 10.198.159.254 | 10.198.159.255 |
| 54 | 10.198.160.0/19 | 10.198.160.1 – 10.198.191.254 | 10.198.191.255 |
| 55 | 10.198.192.0/19 | 10.198.192.1 – 10.198.223.254 | 10.198.223.255 |
| 56 | 10.198.224.0/19 | 10.198.224.1 – 10.198.255.254 | 10.198.255.255 |
| 57 | 10.199.0.0/19 | 10.199.0.1 – 10.199.31.254 | 10.199.31.255 |
| 58 | 10.199.32.0/19 | 10.199.32.1 – 10.199.63.254 | 10.199.63.255 |
| 59 | 10.199.64.0/19 | 10.199.64.1 – 10.199.95.254 | 10.199.95.255 |
| 60 | 10.199.96.0/19 | 10.199.96.1 – 10.199.127.254 | 10.199.127.255 |
| 61 | 10.199.128.0/19 | 10.199.128.1 – 10.199.159.254 | 10.199.159.255 |
| 62 | 10.199.160.0/19 | 10.199.160.1 – 10.199.191.254 | 10.199.191.255 |
| 63 | 10.199.192.0/19 | 10.199.192.1 – 10.199.223.254 | 10.199.223.255 |
| 64 | 10.199.224.0/19 | 10.199.224.1 – 10.199.255.254 | 10.199.255.255 |
| 65 | 10.200.0.0/19 | 10.200.0.1 – 10.200.31.254 | 10.200.31.255 |
| 66 | 10.200.32.0/19 | 10.200.32.1 – 10.200.63.254 | 10.200.63.255 |
| 67 | 10.200.64.0/19 | 10.200.64.1 – 10.200.95.254 | 10.200.95.255 |
| 68 | 10.200.96.0/19 | 10.200.96.1 – 10.200.127.254 | 10.200.127.255 |
| 69 | 10.200.128.0/19 | 10.200.128.1 – 10.200.159.254 | 10.200.159.255 |
| 70 | 10.200.160.0/19 | 10.200.160.1 – 10.200.191.254 | 10.200.191.255 |
| 71 | 10.200.192.0/19 | 10.200.192.1 – 10.200.223.254 | 10.200.223.255 |
| 72 | 10.200.224.0/19 | 10.200.224.1 – 10.200.255.254 | 10.200.255.255 |
| 73 | 10.201.0.0/19 | 10.201.0.1 – 10.201.31.254 | 10.201.31.255 |
| 74 | 10.201.32.0/19 | 10.201.32.1 – 10.201.63.254 | 10.201.63.255 |
| 75 | 10.201.64.0/19 | 10.201.64.1 – 10.201.95.254 | 10.201.95.255 |
| 76 | 10.201.96.0/19 | 10.201.96.1 – 10.201.127.254 | 10.201.127.255 |
| 77 | 10.201.128.0/19 | 10.201.128.1 – 10.201.159.254 | 10.201.159.255 |
| 78 | 10.201.160.0/19 | 10.201.160.1 – 10.201.191.254 | 10.201.191.255 |
| 79 | 10.201.192.0/19 | 10.201.192.1 – 10.201.223.254 | 10.201.223.255 |
| 80 | 10.201.224.0/19 | 10.201.224.1 – 10.201.255.254 | 10.201.255.255 |
| 81 | 10.202.0.0/19 | 10.202.0.1 – 10.202.31.254 | 10.202.31.255 |
| 82 | 10.202.32.0/19 | 10.202.32.1 – 10.202.63.254 | 10.202.63.255 |
| 83 | 10.202.64.0/19 | 10.202.64.1 – 10.202.95.254 | 10.202.95.255 |
| 84 | 10.202.96.0/19 | 10.202.96.1 – 10.202.127.254 | 10.202.127.255 |
| 85 | 10.202.128.0/19 | 10.202.128.1 – 10.202.159.254 | 10.202.159.255 |
| 86 | 10.202.160.0/19 | 10.202.160.1 – 10.202.191.254 | 10.202.191.255 |
| 87 | 10.202.192.0/19 | 10.202.192.1 – 10.202.223.254 | 10.202.223.255 |
| 88 | 10.202.224.0/19 | 10.202.224.1 – 10.202.255.254 | 10.202.255.255 |
| 89 | 10.203.0.0/19 | 10.203.0.1 – 10.203.31.254 | 10.203.31.255 |
| 90 | 10.203.32.0/19 | 10.203.32.1 – 10.203.63.254 | 10.203.63.255 |
| 91 | 10.203.64.0/19 | 10.203.64.1 – 10.203.95.254 | 10.203.95.255 |
| 92 | 10.203.96.0/19 | 10.203.96.1 – 10.203.127.254 | 10.203.127.255 |
| 93 | 10.203.128.0/19 | 10.203.128.1 – 10.203.159.254 | 10.203.159.255 |
| 94 | 10.203.160.0/19 | 10.203.160.1 – 10.203.191.254 | 10.203.191.255 |
| 95 | 10.203.192.0/19 | 10.203.192.1 – 10.203.223.254 | 10.203.223.255 |
| 96 | 10.203.224.0/19 | 10.203.224.1 – 10.203.255.254 | 10.203.255.255 |
| 97 | 10.204.0.0/19 | 10.204.0.1 – 10.204.31.254 | 10.204.31.255 |
| 98 | 10.204.32.0/19 | 10.204.32.1 – 10.204.63.254 | 10.204.63.255 |
| 99 | 10.204.64.0/19 | 10.204.64.1 – 10.204.95.254 | 10.204.95.255 |
| 100 | 10.204.96.0/19 | 10.204.96.1 – 10.204.127.254 | 10.204.127.255 |
| 101 | 10.204.128.0/19 | 10.204.128.1 – 10.204.159.254 | 10.204.159.255 |
| 102 | 10.204.160.0/19 | 10.204.160.1 – 10.204.191.254 | 10.204.191.255 |
| 103 | 10.204.192.0/19 | 10.204.192.1 – 10.204.223.254 | 10.204.223.255 |
| 104 | 10.204.224.0/19 | 10.204.224.1 – 10.204.255.254 | 10.204.255.255 |
| 105 | 10.205.0.0/19 | 10.205.0.1 – 10.205.31.254 | 10.205.31.255 |
| 106 | 10.205.32.0/19 | 10.205.32.1 – 10.205.63.254 | 10.205.63.255 |
| 107 | 10.205.64.0/19 | 10.205.64.1 – 10.205.95.254 | 10.205.95.255 |
| 108 | 10.205.96.0/19 | 10.205.96.1 – 10.205.127.254 | 10.205.127.255 |
| 109 | 10.205.128.0/19 | 10.205.128.1 – 10.205.159.254 | 10.205.159.255 |
| 110 | 10.205.160.0/19 | 10.205.160.1 – 10.205.191.254 | 10.205.191.255 |
| 111 | 10.205.192.0/19 | 10.205.192.1 – 10.205.223.254 | 10.205.223.255 |
| 112 | 10.205.224.0/19 | 10.205.224.1 – 10.205.255.254 | 10.205.255.255 |
| 113 | 10.206.0.0/19 | 10.206.0.1 – 10.206.31.254 | 10.206.31.255 |
| 114 | 10.206.32.0/19 | 10.206.32.1 – 10.206.63.254 | 10.206.63.255 |
| 115 | 10.206.64.0/19 | 10.206.64.1 – 10.206.95.254 | 10.206.95.255 |
| 116 | 10.206.96.0/19 | 10.206.96.1 – 10.206.127.254 | 10.206.127.255 |
| 117 | 10.206.128.0/19 | 10.206.128.1 – 10.206.159.254 | 10.206.159.255 |
| 118 | 10.206.160.0/19 | 10.206.160.1 – 10.206.191.254 | 10.206.191.255 |
| 119 | 10.206.192.0/19 | 10.206.192.1 – 10.206.223.254 | 10.206.223.255 |
| 120 | 10.206.224.0/19 | 10.206.224.1 – 10.206.255.254 | 10.206.255.255 |
| 121 | 10.207.0.0/19 | 10.207.0.1 – 10.207.31.254 | 10.207.31.255 |
| 122 | 10.207.32.0/19 | 10.207.32.1 – 10.207.63.254 | 10.207.63.255 |
| 123 | 10.207.64.0/19 | 10.207.64.1 – 10.207.95.254 | 10.207.95.255 |
| 124 | 10.207.96.0/19 | 10.207.96.1 – 10.207.127.254 | 10.207.127.255 |
| 125 | 10.207.128.0/19 | 10.207.128.1 – 10.207.159.254 | 10.207.159.255 |
| 126 | 10.207.160.0/19 | 10.207.160.1 – 10.207.191.254 | 10.207.191.255 |
| 127 | 10.207.192.0/19 | 10.207.192.1 – 10.207.223.254 | 10.207.223.255 |
| 128 | 10.207.224.0/19 | 10.207.224.1 – 10.207.255.254 | 10.207.255.255 |
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 /12 |
|---|---|---|---|---|
| /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 | 1 |
| /13 | 255.248.0.0 | 524,288 | 524,286 | 2 split → |
| /14 | 255.252.0.0 | 262,144 | 262,142 | 4 split → |
| /15 | 255.254.0.0 | 131,072 | 131,070 | 8 split → |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 16 split → |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 32 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 64 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 128 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 256 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 512 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 1,024 split → |
| /23 | 255.255.254.0 | 512 | 510 | 2,048 split → |
| /24 | 255.255.255.0 | 256 | 254 | 4,096 split → |
| /25 | 255.255.255.128 | 128 | 126 | 8,192 split → |
| /26 | 255.255.255.192 | 64 | 62 | 16,384 split → |
| /27 | 255.255.255.224 | 32 | 30 | 32,768 split → |
| /28 | 255.255.255.240 | 16 | 14 | 65,536 split → |
| /29 | 255.255.255.248 | 8 | 6 | 131,072 split → |
| /30 | 255.255.255.252 | 4 | 2 | 262,144 split → |
| /31 | 255.255.255.254 | 2 | 2 | 524,288 split → |
| /32 | 255.255.255.255 | 1 | 1 | 1,048,576 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.