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)10.178.0.0/16
network10.178.0.0/16
broadcast10.178.255.255
first host10.178.0.1
last host10.178.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.178.0.0/16
address00001010.10110010.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.10110010.00000000.00000000
broadcast00001010.10110010.11111111.11111111
green = network part, grey = host part
hex0x0ab20000
decimal179437568
reverse dns0.0.178.10.in-addr.arpa
ipv4-mapped::ffff:ab2:0
/16 split into /23 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.178.0.0/23 | 10.178.0.1 – 10.178.1.254 | 10.178.1.255 |
| 2 | 10.178.2.0/23 | 10.178.2.1 – 10.178.3.254 | 10.178.3.255 |
| 3 | 10.178.4.0/23 | 10.178.4.1 – 10.178.5.254 | 10.178.5.255 |
| 4 | 10.178.6.0/23 | 10.178.6.1 – 10.178.7.254 | 10.178.7.255 |
| 5 | 10.178.8.0/23 | 10.178.8.1 – 10.178.9.254 | 10.178.9.255 |
| 6 | 10.178.10.0/23 | 10.178.10.1 – 10.178.11.254 | 10.178.11.255 |
| 7 | 10.178.12.0/23 | 10.178.12.1 – 10.178.13.254 | 10.178.13.255 |
| 8 | 10.178.14.0/23 | 10.178.14.1 – 10.178.15.254 | 10.178.15.255 |
| 9 | 10.178.16.0/23 | 10.178.16.1 – 10.178.17.254 | 10.178.17.255 |
| 10 | 10.178.18.0/23 | 10.178.18.1 – 10.178.19.254 | 10.178.19.255 |
| 11 | 10.178.20.0/23 | 10.178.20.1 – 10.178.21.254 | 10.178.21.255 |
| 12 | 10.178.22.0/23 | 10.178.22.1 – 10.178.23.254 | 10.178.23.255 |
| 13 | 10.178.24.0/23 | 10.178.24.1 – 10.178.25.254 | 10.178.25.255 |
| 14 | 10.178.26.0/23 | 10.178.26.1 – 10.178.27.254 | 10.178.27.255 |
| 15 | 10.178.28.0/23 | 10.178.28.1 – 10.178.29.254 | 10.178.29.255 |
| 16 | 10.178.30.0/23 | 10.178.30.1 – 10.178.31.254 | 10.178.31.255 |
| 17 | 10.178.32.0/23 | 10.178.32.1 – 10.178.33.254 | 10.178.33.255 |
| 18 | 10.178.34.0/23 | 10.178.34.1 – 10.178.35.254 | 10.178.35.255 |
| 19 | 10.178.36.0/23 | 10.178.36.1 – 10.178.37.254 | 10.178.37.255 |
| 20 | 10.178.38.0/23 | 10.178.38.1 – 10.178.39.254 | 10.178.39.255 |
| 21 | 10.178.40.0/23 | 10.178.40.1 – 10.178.41.254 | 10.178.41.255 |
| 22 | 10.178.42.0/23 | 10.178.42.1 – 10.178.43.254 | 10.178.43.255 |
| 23 | 10.178.44.0/23 | 10.178.44.1 – 10.178.45.254 | 10.178.45.255 |
| 24 | 10.178.46.0/23 | 10.178.46.1 – 10.178.47.254 | 10.178.47.255 |
| 25 | 10.178.48.0/23 | 10.178.48.1 – 10.178.49.254 | 10.178.49.255 |
| 26 | 10.178.50.0/23 | 10.178.50.1 – 10.178.51.254 | 10.178.51.255 |
| 27 | 10.178.52.0/23 | 10.178.52.1 – 10.178.53.254 | 10.178.53.255 |
| 28 | 10.178.54.0/23 | 10.178.54.1 – 10.178.55.254 | 10.178.55.255 |
| 29 | 10.178.56.0/23 | 10.178.56.1 – 10.178.57.254 | 10.178.57.255 |
| 30 | 10.178.58.0/23 | 10.178.58.1 – 10.178.59.254 | 10.178.59.255 |
| 31 | 10.178.60.0/23 | 10.178.60.1 – 10.178.61.254 | 10.178.61.255 |
| 32 | 10.178.62.0/23 | 10.178.62.1 – 10.178.63.254 | 10.178.63.255 |
| 33 | 10.178.64.0/23 | 10.178.64.1 – 10.178.65.254 | 10.178.65.255 |
| 34 | 10.178.66.0/23 | 10.178.66.1 – 10.178.67.254 | 10.178.67.255 |
| 35 | 10.178.68.0/23 | 10.178.68.1 – 10.178.69.254 | 10.178.69.255 |
| 36 | 10.178.70.0/23 | 10.178.70.1 – 10.178.71.254 | 10.178.71.255 |
| 37 | 10.178.72.0/23 | 10.178.72.1 – 10.178.73.254 | 10.178.73.255 |
| 38 | 10.178.74.0/23 | 10.178.74.1 – 10.178.75.254 | 10.178.75.255 |
| 39 | 10.178.76.0/23 | 10.178.76.1 – 10.178.77.254 | 10.178.77.255 |
| 40 | 10.178.78.0/23 | 10.178.78.1 – 10.178.79.254 | 10.178.79.255 |
| 41 | 10.178.80.0/23 | 10.178.80.1 – 10.178.81.254 | 10.178.81.255 |
| 42 | 10.178.82.0/23 | 10.178.82.1 – 10.178.83.254 | 10.178.83.255 |
| 43 | 10.178.84.0/23 | 10.178.84.1 – 10.178.85.254 | 10.178.85.255 |
| 44 | 10.178.86.0/23 | 10.178.86.1 – 10.178.87.254 | 10.178.87.255 |
| 45 | 10.178.88.0/23 | 10.178.88.1 – 10.178.89.254 | 10.178.89.255 |
| 46 | 10.178.90.0/23 | 10.178.90.1 – 10.178.91.254 | 10.178.91.255 |
| 47 | 10.178.92.0/23 | 10.178.92.1 – 10.178.93.254 | 10.178.93.255 |
| 48 | 10.178.94.0/23 | 10.178.94.1 – 10.178.95.254 | 10.178.95.255 |
| 49 | 10.178.96.0/23 | 10.178.96.1 – 10.178.97.254 | 10.178.97.255 |
| 50 | 10.178.98.0/23 | 10.178.98.1 – 10.178.99.254 | 10.178.99.255 |
| 51 | 10.178.100.0/23 | 10.178.100.1 – 10.178.101.254 | 10.178.101.255 |
| 52 | 10.178.102.0/23 | 10.178.102.1 – 10.178.103.254 | 10.178.103.255 |
| 53 | 10.178.104.0/23 | 10.178.104.1 – 10.178.105.254 | 10.178.105.255 |
| 54 | 10.178.106.0/23 | 10.178.106.1 – 10.178.107.254 | 10.178.107.255 |
| 55 | 10.178.108.0/23 | 10.178.108.1 – 10.178.109.254 | 10.178.109.255 |
| 56 | 10.178.110.0/23 | 10.178.110.1 – 10.178.111.254 | 10.178.111.255 |
| 57 | 10.178.112.0/23 | 10.178.112.1 – 10.178.113.254 | 10.178.113.255 |
| 58 | 10.178.114.0/23 | 10.178.114.1 – 10.178.115.254 | 10.178.115.255 |
| 59 | 10.178.116.0/23 | 10.178.116.1 – 10.178.117.254 | 10.178.117.255 |
| 60 | 10.178.118.0/23 | 10.178.118.1 – 10.178.119.254 | 10.178.119.255 |
| 61 | 10.178.120.0/23 | 10.178.120.1 – 10.178.121.254 | 10.178.121.255 |
| 62 | 10.178.122.0/23 | 10.178.122.1 – 10.178.123.254 | 10.178.123.255 |
| 63 | 10.178.124.0/23 | 10.178.124.1 – 10.178.125.254 | 10.178.125.255 |
| 64 | 10.178.126.0/23 | 10.178.126.1 – 10.178.127.254 | 10.178.127.255 |
| 65 | 10.178.128.0/23 | 10.178.128.1 – 10.178.129.254 | 10.178.129.255 |
| 66 | 10.178.130.0/23 | 10.178.130.1 – 10.178.131.254 | 10.178.131.255 |
| 67 | 10.178.132.0/23 | 10.178.132.1 – 10.178.133.254 | 10.178.133.255 |
| 68 | 10.178.134.0/23 | 10.178.134.1 – 10.178.135.254 | 10.178.135.255 |
| 69 | 10.178.136.0/23 | 10.178.136.1 – 10.178.137.254 | 10.178.137.255 |
| 70 | 10.178.138.0/23 | 10.178.138.1 – 10.178.139.254 | 10.178.139.255 |
| 71 | 10.178.140.0/23 | 10.178.140.1 – 10.178.141.254 | 10.178.141.255 |
| 72 | 10.178.142.0/23 | 10.178.142.1 – 10.178.143.254 | 10.178.143.255 |
| 73 | 10.178.144.0/23 | 10.178.144.1 – 10.178.145.254 | 10.178.145.255 |
| 74 | 10.178.146.0/23 | 10.178.146.1 – 10.178.147.254 | 10.178.147.255 |
| 75 | 10.178.148.0/23 | 10.178.148.1 – 10.178.149.254 | 10.178.149.255 |
| 76 | 10.178.150.0/23 | 10.178.150.1 – 10.178.151.254 | 10.178.151.255 |
| 77 | 10.178.152.0/23 | 10.178.152.1 – 10.178.153.254 | 10.178.153.255 |
| 78 | 10.178.154.0/23 | 10.178.154.1 – 10.178.155.254 | 10.178.155.255 |
| 79 | 10.178.156.0/23 | 10.178.156.1 – 10.178.157.254 | 10.178.157.255 |
| 80 | 10.178.158.0/23 | 10.178.158.1 – 10.178.159.254 | 10.178.159.255 |
| 81 | 10.178.160.0/23 | 10.178.160.1 – 10.178.161.254 | 10.178.161.255 |
| 82 | 10.178.162.0/23 | 10.178.162.1 – 10.178.163.254 | 10.178.163.255 |
| 83 | 10.178.164.0/23 | 10.178.164.1 – 10.178.165.254 | 10.178.165.255 |
| 84 | 10.178.166.0/23 | 10.178.166.1 – 10.178.167.254 | 10.178.167.255 |
| 85 | 10.178.168.0/23 | 10.178.168.1 – 10.178.169.254 | 10.178.169.255 |
| 86 | 10.178.170.0/23 | 10.178.170.1 – 10.178.171.254 | 10.178.171.255 |
| 87 | 10.178.172.0/23 | 10.178.172.1 – 10.178.173.254 | 10.178.173.255 |
| 88 | 10.178.174.0/23 | 10.178.174.1 – 10.178.175.254 | 10.178.175.255 |
| 89 | 10.178.176.0/23 | 10.178.176.1 – 10.178.177.254 | 10.178.177.255 |
| 90 | 10.178.178.0/23 | 10.178.178.1 – 10.178.179.254 | 10.178.179.255 |
| 91 | 10.178.180.0/23 | 10.178.180.1 – 10.178.181.254 | 10.178.181.255 |
| 92 | 10.178.182.0/23 | 10.178.182.1 – 10.178.183.254 | 10.178.183.255 |
| 93 | 10.178.184.0/23 | 10.178.184.1 – 10.178.185.254 | 10.178.185.255 |
| 94 | 10.178.186.0/23 | 10.178.186.1 – 10.178.187.254 | 10.178.187.255 |
| 95 | 10.178.188.0/23 | 10.178.188.1 – 10.178.189.254 | 10.178.189.255 |
| 96 | 10.178.190.0/23 | 10.178.190.1 – 10.178.191.254 | 10.178.191.255 |
| 97 | 10.178.192.0/23 | 10.178.192.1 – 10.178.193.254 | 10.178.193.255 |
| 98 | 10.178.194.0/23 | 10.178.194.1 – 10.178.195.254 | 10.178.195.255 |
| 99 | 10.178.196.0/23 | 10.178.196.1 – 10.178.197.254 | 10.178.197.255 |
| 100 | 10.178.198.0/23 | 10.178.198.1 – 10.178.199.254 | 10.178.199.255 |
| 101 | 10.178.200.0/23 | 10.178.200.1 – 10.178.201.254 | 10.178.201.255 |
| 102 | 10.178.202.0/23 | 10.178.202.1 – 10.178.203.254 | 10.178.203.255 |
| 103 | 10.178.204.0/23 | 10.178.204.1 – 10.178.205.254 | 10.178.205.255 |
| 104 | 10.178.206.0/23 | 10.178.206.1 – 10.178.207.254 | 10.178.207.255 |
| 105 | 10.178.208.0/23 | 10.178.208.1 – 10.178.209.254 | 10.178.209.255 |
| 106 | 10.178.210.0/23 | 10.178.210.1 – 10.178.211.254 | 10.178.211.255 |
| 107 | 10.178.212.0/23 | 10.178.212.1 – 10.178.213.254 | 10.178.213.255 |
| 108 | 10.178.214.0/23 | 10.178.214.1 – 10.178.215.254 | 10.178.215.255 |
| 109 | 10.178.216.0/23 | 10.178.216.1 – 10.178.217.254 | 10.178.217.255 |
| 110 | 10.178.218.0/23 | 10.178.218.1 – 10.178.219.254 | 10.178.219.255 |
| 111 | 10.178.220.0/23 | 10.178.220.1 – 10.178.221.254 | 10.178.221.255 |
| 112 | 10.178.222.0/23 | 10.178.222.1 – 10.178.223.254 | 10.178.223.255 |
| 113 | 10.178.224.0/23 | 10.178.224.1 – 10.178.225.254 | 10.178.225.255 |
| 114 | 10.178.226.0/23 | 10.178.226.1 – 10.178.227.254 | 10.178.227.255 |
| 115 | 10.178.228.0/23 | 10.178.228.1 – 10.178.229.254 | 10.178.229.255 |
| 116 | 10.178.230.0/23 | 10.178.230.1 – 10.178.231.254 | 10.178.231.255 |
| 117 | 10.178.232.0/23 | 10.178.232.1 – 10.178.233.254 | 10.178.233.255 |
| 118 | 10.178.234.0/23 | 10.178.234.1 – 10.178.235.254 | 10.178.235.255 |
| 119 | 10.178.236.0/23 | 10.178.236.1 – 10.178.237.254 | 10.178.237.255 |
| 120 | 10.178.238.0/23 | 10.178.238.1 – 10.178.239.254 | 10.178.239.255 |
| 121 | 10.178.240.0/23 | 10.178.240.1 – 10.178.241.254 | 10.178.241.255 |
| 122 | 10.178.242.0/23 | 10.178.242.1 – 10.178.243.254 | 10.178.243.255 |
| 123 | 10.178.244.0/23 | 10.178.244.1 – 10.178.245.254 | 10.178.245.255 |
| 124 | 10.178.246.0/23 | 10.178.246.1 – 10.178.247.254 | 10.178.247.255 |
| 125 | 10.178.248.0/23 | 10.178.248.1 – 10.178.249.254 | 10.178.249.255 |
| 126 | 10.178.250.0/23 | 10.178.250.1 – 10.178.251.254 | 10.178.251.255 |
| 127 | 10.178.252.0/23 | 10.178.252.1 – 10.178.253.254 | 10.178.253.255 |
| 128 | 10.178.254.0/23 | 10.178.254.1 – 10.178.255.254 | 10.178.255.255 |
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 /16 |
|---|---|---|---|---|
| /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 | 1 |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 2 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 4 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 8 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 16 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 32 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 64 split → |
| /23 | 255.255.254.0 | 512 | 510 | 128 split → |
| /24 | 255.255.255.0 | 256 | 254 | 256 split → |
| /25 | 255.255.255.128 | 128 | 126 | 512 split → |
| /26 | 255.255.255.192 | 64 | 62 | 1,024 split → |
| /27 | 255.255.255.224 | 32 | 30 | 2,048 split → |
| /28 | 255.255.255.240 | 16 | 14 | 4,096 split → |
| /29 | 255.255.255.248 | 8 | 6 | 8,192 split → |
| /30 | 255.255.255.252 | 4 | 2 | 16,384 split → |
| /31 | 255.255.255.254 | 2 | 2 | 32,768 split → |
| /32 | 255.255.255.255 | 1 | 1 | 65,536 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.