ip
ipku.in

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.

$ ipcalc
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.120.0.0/16
network10.120.0.0/16
broadcast10.120.255.255
first host10.120.0.1
last host10.120.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.120.0.0/16
address00001010.01111000.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.01111000.00000000.00000000
broadcast00001010.01111000.11111111.11111111
green = network part, grey = host part
hex0x0a780000
decimal175636480
reverse dns0.0.120.10.in-addr.arpa
ipv4-mapped::ffff:a78:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.120.0.0/2310.120.0.1 – 10.120.1.25410.120.1.255
210.120.2.0/2310.120.2.1 – 10.120.3.25410.120.3.255
310.120.4.0/2310.120.4.1 – 10.120.5.25410.120.5.255
410.120.6.0/2310.120.6.1 – 10.120.7.25410.120.7.255
510.120.8.0/2310.120.8.1 – 10.120.9.25410.120.9.255
610.120.10.0/2310.120.10.1 – 10.120.11.25410.120.11.255
710.120.12.0/2310.120.12.1 – 10.120.13.25410.120.13.255
810.120.14.0/2310.120.14.1 – 10.120.15.25410.120.15.255
910.120.16.0/2310.120.16.1 – 10.120.17.25410.120.17.255
1010.120.18.0/2310.120.18.1 – 10.120.19.25410.120.19.255
1110.120.20.0/2310.120.20.1 – 10.120.21.25410.120.21.255
1210.120.22.0/2310.120.22.1 – 10.120.23.25410.120.23.255
1310.120.24.0/2310.120.24.1 – 10.120.25.25410.120.25.255
1410.120.26.0/2310.120.26.1 – 10.120.27.25410.120.27.255
1510.120.28.0/2310.120.28.1 – 10.120.29.25410.120.29.255
1610.120.30.0/2310.120.30.1 – 10.120.31.25410.120.31.255
1710.120.32.0/2310.120.32.1 – 10.120.33.25410.120.33.255
1810.120.34.0/2310.120.34.1 – 10.120.35.25410.120.35.255
1910.120.36.0/2310.120.36.1 – 10.120.37.25410.120.37.255
2010.120.38.0/2310.120.38.1 – 10.120.39.25410.120.39.255
2110.120.40.0/2310.120.40.1 – 10.120.41.25410.120.41.255
2210.120.42.0/2310.120.42.1 – 10.120.43.25410.120.43.255
2310.120.44.0/2310.120.44.1 – 10.120.45.25410.120.45.255
2410.120.46.0/2310.120.46.1 – 10.120.47.25410.120.47.255
2510.120.48.0/2310.120.48.1 – 10.120.49.25410.120.49.255
2610.120.50.0/2310.120.50.1 – 10.120.51.25410.120.51.255
2710.120.52.0/2310.120.52.1 – 10.120.53.25410.120.53.255
2810.120.54.0/2310.120.54.1 – 10.120.55.25410.120.55.255
2910.120.56.0/2310.120.56.1 – 10.120.57.25410.120.57.255
3010.120.58.0/2310.120.58.1 – 10.120.59.25410.120.59.255
3110.120.60.0/2310.120.60.1 – 10.120.61.25410.120.61.255
3210.120.62.0/2310.120.62.1 – 10.120.63.25410.120.63.255
3310.120.64.0/2310.120.64.1 – 10.120.65.25410.120.65.255
3410.120.66.0/2310.120.66.1 – 10.120.67.25410.120.67.255
3510.120.68.0/2310.120.68.1 – 10.120.69.25410.120.69.255
3610.120.70.0/2310.120.70.1 – 10.120.71.25410.120.71.255
3710.120.72.0/2310.120.72.1 – 10.120.73.25410.120.73.255
3810.120.74.0/2310.120.74.1 – 10.120.75.25410.120.75.255
3910.120.76.0/2310.120.76.1 – 10.120.77.25410.120.77.255
4010.120.78.0/2310.120.78.1 – 10.120.79.25410.120.79.255
4110.120.80.0/2310.120.80.1 – 10.120.81.25410.120.81.255
4210.120.82.0/2310.120.82.1 – 10.120.83.25410.120.83.255
4310.120.84.0/2310.120.84.1 – 10.120.85.25410.120.85.255
4410.120.86.0/2310.120.86.1 – 10.120.87.25410.120.87.255
4510.120.88.0/2310.120.88.1 – 10.120.89.25410.120.89.255
4610.120.90.0/2310.120.90.1 – 10.120.91.25410.120.91.255
4710.120.92.0/2310.120.92.1 – 10.120.93.25410.120.93.255
4810.120.94.0/2310.120.94.1 – 10.120.95.25410.120.95.255
4910.120.96.0/2310.120.96.1 – 10.120.97.25410.120.97.255
5010.120.98.0/2310.120.98.1 – 10.120.99.25410.120.99.255
5110.120.100.0/2310.120.100.1 – 10.120.101.25410.120.101.255
5210.120.102.0/2310.120.102.1 – 10.120.103.25410.120.103.255
5310.120.104.0/2310.120.104.1 – 10.120.105.25410.120.105.255
5410.120.106.0/2310.120.106.1 – 10.120.107.25410.120.107.255
5510.120.108.0/2310.120.108.1 – 10.120.109.25410.120.109.255
5610.120.110.0/2310.120.110.1 – 10.120.111.25410.120.111.255
5710.120.112.0/2310.120.112.1 – 10.120.113.25410.120.113.255
5810.120.114.0/2310.120.114.1 – 10.120.115.25410.120.115.255
5910.120.116.0/2310.120.116.1 – 10.120.117.25410.120.117.255
6010.120.118.0/2310.120.118.1 – 10.120.119.25410.120.119.255
6110.120.120.0/2310.120.120.1 – 10.120.121.25410.120.121.255
6210.120.122.0/2310.120.122.1 – 10.120.123.25410.120.123.255
6310.120.124.0/2310.120.124.1 – 10.120.125.25410.120.125.255
6410.120.126.0/2310.120.126.1 – 10.120.127.25410.120.127.255
6510.120.128.0/2310.120.128.1 – 10.120.129.25410.120.129.255
6610.120.130.0/2310.120.130.1 – 10.120.131.25410.120.131.255
6710.120.132.0/2310.120.132.1 – 10.120.133.25410.120.133.255
6810.120.134.0/2310.120.134.1 – 10.120.135.25410.120.135.255
6910.120.136.0/2310.120.136.1 – 10.120.137.25410.120.137.255
7010.120.138.0/2310.120.138.1 – 10.120.139.25410.120.139.255
7110.120.140.0/2310.120.140.1 – 10.120.141.25410.120.141.255
7210.120.142.0/2310.120.142.1 – 10.120.143.25410.120.143.255
7310.120.144.0/2310.120.144.1 – 10.120.145.25410.120.145.255
7410.120.146.0/2310.120.146.1 – 10.120.147.25410.120.147.255
7510.120.148.0/2310.120.148.1 – 10.120.149.25410.120.149.255
7610.120.150.0/2310.120.150.1 – 10.120.151.25410.120.151.255
7710.120.152.0/2310.120.152.1 – 10.120.153.25410.120.153.255
7810.120.154.0/2310.120.154.1 – 10.120.155.25410.120.155.255
7910.120.156.0/2310.120.156.1 – 10.120.157.25410.120.157.255
8010.120.158.0/2310.120.158.1 – 10.120.159.25410.120.159.255
8110.120.160.0/2310.120.160.1 – 10.120.161.25410.120.161.255
8210.120.162.0/2310.120.162.1 – 10.120.163.25410.120.163.255
8310.120.164.0/2310.120.164.1 – 10.120.165.25410.120.165.255
8410.120.166.0/2310.120.166.1 – 10.120.167.25410.120.167.255
8510.120.168.0/2310.120.168.1 – 10.120.169.25410.120.169.255
8610.120.170.0/2310.120.170.1 – 10.120.171.25410.120.171.255
8710.120.172.0/2310.120.172.1 – 10.120.173.25410.120.173.255
8810.120.174.0/2310.120.174.1 – 10.120.175.25410.120.175.255
8910.120.176.0/2310.120.176.1 – 10.120.177.25410.120.177.255
9010.120.178.0/2310.120.178.1 – 10.120.179.25410.120.179.255
9110.120.180.0/2310.120.180.1 – 10.120.181.25410.120.181.255
9210.120.182.0/2310.120.182.1 – 10.120.183.25410.120.183.255
9310.120.184.0/2310.120.184.1 – 10.120.185.25410.120.185.255
9410.120.186.0/2310.120.186.1 – 10.120.187.25410.120.187.255
9510.120.188.0/2310.120.188.1 – 10.120.189.25410.120.189.255
9610.120.190.0/2310.120.190.1 – 10.120.191.25410.120.191.255
9710.120.192.0/2310.120.192.1 – 10.120.193.25410.120.193.255
9810.120.194.0/2310.120.194.1 – 10.120.195.25410.120.195.255
9910.120.196.0/2310.120.196.1 – 10.120.197.25410.120.197.255
10010.120.198.0/2310.120.198.1 – 10.120.199.25410.120.199.255
10110.120.200.0/2310.120.200.1 – 10.120.201.25410.120.201.255
10210.120.202.0/2310.120.202.1 – 10.120.203.25410.120.203.255
10310.120.204.0/2310.120.204.1 – 10.120.205.25410.120.205.255
10410.120.206.0/2310.120.206.1 – 10.120.207.25410.120.207.255
10510.120.208.0/2310.120.208.1 – 10.120.209.25410.120.209.255
10610.120.210.0/2310.120.210.1 – 10.120.211.25410.120.211.255
10710.120.212.0/2310.120.212.1 – 10.120.213.25410.120.213.255
10810.120.214.0/2310.120.214.1 – 10.120.215.25410.120.215.255
10910.120.216.0/2310.120.216.1 – 10.120.217.25410.120.217.255
11010.120.218.0/2310.120.218.1 – 10.120.219.25410.120.219.255
11110.120.220.0/2310.120.220.1 – 10.120.221.25410.120.221.255
11210.120.222.0/2310.120.222.1 – 10.120.223.25410.120.223.255
11310.120.224.0/2310.120.224.1 – 10.120.225.25410.120.225.255
11410.120.226.0/2310.120.226.1 – 10.120.227.25410.120.227.255
11510.120.228.0/2310.120.228.1 – 10.120.229.25410.120.229.255
11610.120.230.0/2310.120.230.1 – 10.120.231.25410.120.231.255
11710.120.232.0/2310.120.232.1 – 10.120.233.25410.120.233.255
11810.120.234.0/2310.120.234.1 – 10.120.235.25410.120.235.255
11910.120.236.0/2310.120.236.1 – 10.120.237.25410.120.237.255
12010.120.238.0/2310.120.238.1 – 10.120.239.25410.120.239.255
12110.120.240.0/2310.120.240.1 – 10.120.241.25410.120.241.255
12210.120.242.0/2310.120.242.1 – 10.120.243.25410.120.243.255
12310.120.244.0/2310.120.244.1 – 10.120.245.25410.120.245.255
12410.120.246.0/2310.120.246.1 – 10.120.247.25410.120.247.255
12510.120.248.0/2310.120.248.1 – 10.120.249.25410.120.249.255
12610.120.250.0/2310.120.250.1 – 10.120.251.25410.120.251.255
12710.120.252.0/2310.120.252.1 – 10.120.253.25410.120.253.255
12810.120.254.0/2310.120.254.1 – 10.120.255.25410.120.255.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /16
/00.0.0.04,294,967,2964,294,967,294-
/1128.0.0.02,147,483,6482,147,483,646-
/2192.0.0.01,073,741,8241,073,741,822-
/3224.0.0.0536,870,912536,870,910-
/4240.0.0.0268,435,456268,435,454-
/5248.0.0.0134,217,728134,217,726-
/6252.0.0.067,108,86467,108,862-
/7254.0.0.033,554,43233,554,430-
/8255.0.0.016,777,21616,777,214-
/9255.128.0.08,388,6088,388,606-
/10255.192.0.04,194,3044,194,302-
/11255.224.0.02,097,1522,097,150-
/12255.240.0.01,048,5761,048,574-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,5341
/17255.255.128.032,76832,7662 split →
/18255.255.192.016,38416,3824 split →
/19255.255.224.08,1928,1908 split →
/20255.255.240.04,0964,09416 split →
/21255.255.248.02,0482,04632 split →
/22255.255.252.01,0241,02264 split →
/23255.255.254.0512510128 split →
/24255.255.255.0256254256 split →
/25255.255.255.128128126512 split →
/26255.255.255.19264621,024 split →
/27255.255.255.22432302,048 split →
/28255.255.255.24016144,096 split →
/29255.255.255.248868,192 split →
/30255.255.255.2524216,384 split →
/31255.255.255.2542232,768 split →
/32255.255.255.2551165,536 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.

Learn how to work it out →