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)10.180.0.0/15
network10.180.0.0/15
broadcast10.181.255.255
first host10.180.0.1
last host10.181.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.180.0.0/15
address00001010.10110100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.10110100.00000000.00000000
broadcast00001010.10110101.11111111.11111111
green = network part, grey = host part
hex0x0ab40000
decimal179568640
reverse dns0.0.180.10.in-addr.arpa
ipv4-mapped::ffff:ab4:0
/15 split into /22 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.180.0.0/22 | 10.180.0.1 – 10.180.3.254 | 10.180.3.255 |
| 2 | 10.180.4.0/22 | 10.180.4.1 – 10.180.7.254 | 10.180.7.255 |
| 3 | 10.180.8.0/22 | 10.180.8.1 – 10.180.11.254 | 10.180.11.255 |
| 4 | 10.180.12.0/22 | 10.180.12.1 – 10.180.15.254 | 10.180.15.255 |
| 5 | 10.180.16.0/22 | 10.180.16.1 – 10.180.19.254 | 10.180.19.255 |
| 6 | 10.180.20.0/22 | 10.180.20.1 – 10.180.23.254 | 10.180.23.255 |
| 7 | 10.180.24.0/22 | 10.180.24.1 – 10.180.27.254 | 10.180.27.255 |
| 8 | 10.180.28.0/22 | 10.180.28.1 – 10.180.31.254 | 10.180.31.255 |
| 9 | 10.180.32.0/22 | 10.180.32.1 – 10.180.35.254 | 10.180.35.255 |
| 10 | 10.180.36.0/22 | 10.180.36.1 – 10.180.39.254 | 10.180.39.255 |
| 11 | 10.180.40.0/22 | 10.180.40.1 – 10.180.43.254 | 10.180.43.255 |
| 12 | 10.180.44.0/22 | 10.180.44.1 – 10.180.47.254 | 10.180.47.255 |
| 13 | 10.180.48.0/22 | 10.180.48.1 – 10.180.51.254 | 10.180.51.255 |
| 14 | 10.180.52.0/22 | 10.180.52.1 – 10.180.55.254 | 10.180.55.255 |
| 15 | 10.180.56.0/22 | 10.180.56.1 – 10.180.59.254 | 10.180.59.255 |
| 16 | 10.180.60.0/22 | 10.180.60.1 – 10.180.63.254 | 10.180.63.255 |
| 17 | 10.180.64.0/22 | 10.180.64.1 – 10.180.67.254 | 10.180.67.255 |
| 18 | 10.180.68.0/22 | 10.180.68.1 – 10.180.71.254 | 10.180.71.255 |
| 19 | 10.180.72.0/22 | 10.180.72.1 – 10.180.75.254 | 10.180.75.255 |
| 20 | 10.180.76.0/22 | 10.180.76.1 – 10.180.79.254 | 10.180.79.255 |
| 21 | 10.180.80.0/22 | 10.180.80.1 – 10.180.83.254 | 10.180.83.255 |
| 22 | 10.180.84.0/22 | 10.180.84.1 – 10.180.87.254 | 10.180.87.255 |
| 23 | 10.180.88.0/22 | 10.180.88.1 – 10.180.91.254 | 10.180.91.255 |
| 24 | 10.180.92.0/22 | 10.180.92.1 – 10.180.95.254 | 10.180.95.255 |
| 25 | 10.180.96.0/22 | 10.180.96.1 – 10.180.99.254 | 10.180.99.255 |
| 26 | 10.180.100.0/22 | 10.180.100.1 – 10.180.103.254 | 10.180.103.255 |
| 27 | 10.180.104.0/22 | 10.180.104.1 – 10.180.107.254 | 10.180.107.255 |
| 28 | 10.180.108.0/22 | 10.180.108.1 – 10.180.111.254 | 10.180.111.255 |
| 29 | 10.180.112.0/22 | 10.180.112.1 – 10.180.115.254 | 10.180.115.255 |
| 30 | 10.180.116.0/22 | 10.180.116.1 – 10.180.119.254 | 10.180.119.255 |
| 31 | 10.180.120.0/22 | 10.180.120.1 – 10.180.123.254 | 10.180.123.255 |
| 32 | 10.180.124.0/22 | 10.180.124.1 – 10.180.127.254 | 10.180.127.255 |
| 33 | 10.180.128.0/22 | 10.180.128.1 – 10.180.131.254 | 10.180.131.255 |
| 34 | 10.180.132.0/22 | 10.180.132.1 – 10.180.135.254 | 10.180.135.255 |
| 35 | 10.180.136.0/22 | 10.180.136.1 – 10.180.139.254 | 10.180.139.255 |
| 36 | 10.180.140.0/22 | 10.180.140.1 – 10.180.143.254 | 10.180.143.255 |
| 37 | 10.180.144.0/22 | 10.180.144.1 – 10.180.147.254 | 10.180.147.255 |
| 38 | 10.180.148.0/22 | 10.180.148.1 – 10.180.151.254 | 10.180.151.255 |
| 39 | 10.180.152.0/22 | 10.180.152.1 – 10.180.155.254 | 10.180.155.255 |
| 40 | 10.180.156.0/22 | 10.180.156.1 – 10.180.159.254 | 10.180.159.255 |
| 41 | 10.180.160.0/22 | 10.180.160.1 – 10.180.163.254 | 10.180.163.255 |
| 42 | 10.180.164.0/22 | 10.180.164.1 – 10.180.167.254 | 10.180.167.255 |
| 43 | 10.180.168.0/22 | 10.180.168.1 – 10.180.171.254 | 10.180.171.255 |
| 44 | 10.180.172.0/22 | 10.180.172.1 – 10.180.175.254 | 10.180.175.255 |
| 45 | 10.180.176.0/22 | 10.180.176.1 – 10.180.179.254 | 10.180.179.255 |
| 46 | 10.180.180.0/22 | 10.180.180.1 – 10.180.183.254 | 10.180.183.255 |
| 47 | 10.180.184.0/22 | 10.180.184.1 – 10.180.187.254 | 10.180.187.255 |
| 48 | 10.180.188.0/22 | 10.180.188.1 – 10.180.191.254 | 10.180.191.255 |
| 49 | 10.180.192.0/22 | 10.180.192.1 – 10.180.195.254 | 10.180.195.255 |
| 50 | 10.180.196.0/22 | 10.180.196.1 – 10.180.199.254 | 10.180.199.255 |
| 51 | 10.180.200.0/22 | 10.180.200.1 – 10.180.203.254 | 10.180.203.255 |
| 52 | 10.180.204.0/22 | 10.180.204.1 – 10.180.207.254 | 10.180.207.255 |
| 53 | 10.180.208.0/22 | 10.180.208.1 – 10.180.211.254 | 10.180.211.255 |
| 54 | 10.180.212.0/22 | 10.180.212.1 – 10.180.215.254 | 10.180.215.255 |
| 55 | 10.180.216.0/22 | 10.180.216.1 – 10.180.219.254 | 10.180.219.255 |
| 56 | 10.180.220.0/22 | 10.180.220.1 – 10.180.223.254 | 10.180.223.255 |
| 57 | 10.180.224.0/22 | 10.180.224.1 – 10.180.227.254 | 10.180.227.255 |
| 58 | 10.180.228.0/22 | 10.180.228.1 – 10.180.231.254 | 10.180.231.255 |
| 59 | 10.180.232.0/22 | 10.180.232.1 – 10.180.235.254 | 10.180.235.255 |
| 60 | 10.180.236.0/22 | 10.180.236.1 – 10.180.239.254 | 10.180.239.255 |
| 61 | 10.180.240.0/22 | 10.180.240.1 – 10.180.243.254 | 10.180.243.255 |
| 62 | 10.180.244.0/22 | 10.180.244.1 – 10.180.247.254 | 10.180.247.255 |
| 63 | 10.180.248.0/22 | 10.180.248.1 – 10.180.251.254 | 10.180.251.255 |
| 64 | 10.180.252.0/22 | 10.180.252.1 – 10.180.255.254 | 10.180.255.255 |
| 65 | 10.181.0.0/22 | 10.181.0.1 – 10.181.3.254 | 10.181.3.255 |
| 66 | 10.181.4.0/22 | 10.181.4.1 – 10.181.7.254 | 10.181.7.255 |
| 67 | 10.181.8.0/22 | 10.181.8.1 – 10.181.11.254 | 10.181.11.255 |
| 68 | 10.181.12.0/22 | 10.181.12.1 – 10.181.15.254 | 10.181.15.255 |
| 69 | 10.181.16.0/22 | 10.181.16.1 – 10.181.19.254 | 10.181.19.255 |
| 70 | 10.181.20.0/22 | 10.181.20.1 – 10.181.23.254 | 10.181.23.255 |
| 71 | 10.181.24.0/22 | 10.181.24.1 – 10.181.27.254 | 10.181.27.255 |
| 72 | 10.181.28.0/22 | 10.181.28.1 – 10.181.31.254 | 10.181.31.255 |
| 73 | 10.181.32.0/22 | 10.181.32.1 – 10.181.35.254 | 10.181.35.255 |
| 74 | 10.181.36.0/22 | 10.181.36.1 – 10.181.39.254 | 10.181.39.255 |
| 75 | 10.181.40.0/22 | 10.181.40.1 – 10.181.43.254 | 10.181.43.255 |
| 76 | 10.181.44.0/22 | 10.181.44.1 – 10.181.47.254 | 10.181.47.255 |
| 77 | 10.181.48.0/22 | 10.181.48.1 – 10.181.51.254 | 10.181.51.255 |
| 78 | 10.181.52.0/22 | 10.181.52.1 – 10.181.55.254 | 10.181.55.255 |
| 79 | 10.181.56.0/22 | 10.181.56.1 – 10.181.59.254 | 10.181.59.255 |
| 80 | 10.181.60.0/22 | 10.181.60.1 – 10.181.63.254 | 10.181.63.255 |
| 81 | 10.181.64.0/22 | 10.181.64.1 – 10.181.67.254 | 10.181.67.255 |
| 82 | 10.181.68.0/22 | 10.181.68.1 – 10.181.71.254 | 10.181.71.255 |
| 83 | 10.181.72.0/22 | 10.181.72.1 – 10.181.75.254 | 10.181.75.255 |
| 84 | 10.181.76.0/22 | 10.181.76.1 – 10.181.79.254 | 10.181.79.255 |
| 85 | 10.181.80.0/22 | 10.181.80.1 – 10.181.83.254 | 10.181.83.255 |
| 86 | 10.181.84.0/22 | 10.181.84.1 – 10.181.87.254 | 10.181.87.255 |
| 87 | 10.181.88.0/22 | 10.181.88.1 – 10.181.91.254 | 10.181.91.255 |
| 88 | 10.181.92.0/22 | 10.181.92.1 – 10.181.95.254 | 10.181.95.255 |
| 89 | 10.181.96.0/22 | 10.181.96.1 – 10.181.99.254 | 10.181.99.255 |
| 90 | 10.181.100.0/22 | 10.181.100.1 – 10.181.103.254 | 10.181.103.255 |
| 91 | 10.181.104.0/22 | 10.181.104.1 – 10.181.107.254 | 10.181.107.255 |
| 92 | 10.181.108.0/22 | 10.181.108.1 – 10.181.111.254 | 10.181.111.255 |
| 93 | 10.181.112.0/22 | 10.181.112.1 – 10.181.115.254 | 10.181.115.255 |
| 94 | 10.181.116.0/22 | 10.181.116.1 – 10.181.119.254 | 10.181.119.255 |
| 95 | 10.181.120.0/22 | 10.181.120.1 – 10.181.123.254 | 10.181.123.255 |
| 96 | 10.181.124.0/22 | 10.181.124.1 – 10.181.127.254 | 10.181.127.255 |
| 97 | 10.181.128.0/22 | 10.181.128.1 – 10.181.131.254 | 10.181.131.255 |
| 98 | 10.181.132.0/22 | 10.181.132.1 – 10.181.135.254 | 10.181.135.255 |
| 99 | 10.181.136.0/22 | 10.181.136.1 – 10.181.139.254 | 10.181.139.255 |
| 100 | 10.181.140.0/22 | 10.181.140.1 – 10.181.143.254 | 10.181.143.255 |
| 101 | 10.181.144.0/22 | 10.181.144.1 – 10.181.147.254 | 10.181.147.255 |
| 102 | 10.181.148.0/22 | 10.181.148.1 – 10.181.151.254 | 10.181.151.255 |
| 103 | 10.181.152.0/22 | 10.181.152.1 – 10.181.155.254 | 10.181.155.255 |
| 104 | 10.181.156.0/22 | 10.181.156.1 – 10.181.159.254 | 10.181.159.255 |
| 105 | 10.181.160.0/22 | 10.181.160.1 – 10.181.163.254 | 10.181.163.255 |
| 106 | 10.181.164.0/22 | 10.181.164.1 – 10.181.167.254 | 10.181.167.255 |
| 107 | 10.181.168.0/22 | 10.181.168.1 – 10.181.171.254 | 10.181.171.255 |
| 108 | 10.181.172.0/22 | 10.181.172.1 – 10.181.175.254 | 10.181.175.255 |
| 109 | 10.181.176.0/22 | 10.181.176.1 – 10.181.179.254 | 10.181.179.255 |
| 110 | 10.181.180.0/22 | 10.181.180.1 – 10.181.183.254 | 10.181.183.255 |
| 111 | 10.181.184.0/22 | 10.181.184.1 – 10.181.187.254 | 10.181.187.255 |
| 112 | 10.181.188.0/22 | 10.181.188.1 – 10.181.191.254 | 10.181.191.255 |
| 113 | 10.181.192.0/22 | 10.181.192.1 – 10.181.195.254 | 10.181.195.255 |
| 114 | 10.181.196.0/22 | 10.181.196.1 – 10.181.199.254 | 10.181.199.255 |
| 115 | 10.181.200.0/22 | 10.181.200.1 – 10.181.203.254 | 10.181.203.255 |
| 116 | 10.181.204.0/22 | 10.181.204.1 – 10.181.207.254 | 10.181.207.255 |
| 117 | 10.181.208.0/22 | 10.181.208.1 – 10.181.211.254 | 10.181.211.255 |
| 118 | 10.181.212.0/22 | 10.181.212.1 – 10.181.215.254 | 10.181.215.255 |
| 119 | 10.181.216.0/22 | 10.181.216.1 – 10.181.219.254 | 10.181.219.255 |
| 120 | 10.181.220.0/22 | 10.181.220.1 – 10.181.223.254 | 10.181.223.255 |
| 121 | 10.181.224.0/22 | 10.181.224.1 – 10.181.227.254 | 10.181.227.255 |
| 122 | 10.181.228.0/22 | 10.181.228.1 – 10.181.231.254 | 10.181.231.255 |
| 123 | 10.181.232.0/22 | 10.181.232.1 – 10.181.235.254 | 10.181.235.255 |
| 124 | 10.181.236.0/22 | 10.181.236.1 – 10.181.239.254 | 10.181.239.255 |
| 125 | 10.181.240.0/22 | 10.181.240.1 – 10.181.243.254 | 10.181.243.255 |
| 126 | 10.181.244.0/22 | 10.181.244.1 – 10.181.247.254 | 10.181.247.255 |
| 127 | 10.181.248.0/22 | 10.181.248.1 – 10.181.251.254 | 10.181.251.255 |
| 128 | 10.181.252.0/22 | 10.181.252.1 – 10.181.255.254 | 10.181.255.255 |
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 /15 |
|---|---|---|---|---|
| /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 | 1 |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 2 split → |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 4 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 8 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 16 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 32 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 64 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 128 split → |
| /23 | 255.255.254.0 | 512 | 510 | 256 split → |
| /24 | 255.255.255.0 | 256 | 254 | 512 split → |
| /25 | 255.255.255.128 | 128 | 126 | 1,024 split → |
| /26 | 255.255.255.192 | 64 | 62 | 2,048 split → |
| /27 | 255.255.255.224 | 32 | 30 | 4,096 split → |
| /28 | 255.255.255.240 | 16 | 14 | 8,192 split → |
| /29 | 255.255.255.248 | 8 | 6 | 16,384 split → |
| /30 | 255.255.255.252 | 4 | 2 | 32,768 split → |
| /31 | 255.255.255.254 | 2 | 2 | 65,536 split → |
| /32 | 255.255.255.255 | 1 | 1 | 131,072 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.