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)10.239.0.0/16
network10.239.0.0/16
broadcast10.239.255.255
first host10.239.0.1
last host10.239.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.239.0.0/16
address00001010.11101111.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.11101111.00000000.00000000
broadcast00001010.11101111.11111111.11111111
green = network part, grey = host part
hex0x0aef0000
decimal183435264
reverse dns0.0.239.10.in-addr.arpa
ipv4-mapped::ffff:aef:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.239.0.0/2310.239.0.1 – 10.239.1.25410.239.1.255
210.239.2.0/2310.239.2.1 – 10.239.3.25410.239.3.255
310.239.4.0/2310.239.4.1 – 10.239.5.25410.239.5.255
410.239.6.0/2310.239.6.1 – 10.239.7.25410.239.7.255
510.239.8.0/2310.239.8.1 – 10.239.9.25410.239.9.255
610.239.10.0/2310.239.10.1 – 10.239.11.25410.239.11.255
710.239.12.0/2310.239.12.1 – 10.239.13.25410.239.13.255
810.239.14.0/2310.239.14.1 – 10.239.15.25410.239.15.255
910.239.16.0/2310.239.16.1 – 10.239.17.25410.239.17.255
1010.239.18.0/2310.239.18.1 – 10.239.19.25410.239.19.255
1110.239.20.0/2310.239.20.1 – 10.239.21.25410.239.21.255
1210.239.22.0/2310.239.22.1 – 10.239.23.25410.239.23.255
1310.239.24.0/2310.239.24.1 – 10.239.25.25410.239.25.255
1410.239.26.0/2310.239.26.1 – 10.239.27.25410.239.27.255
1510.239.28.0/2310.239.28.1 – 10.239.29.25410.239.29.255
1610.239.30.0/2310.239.30.1 – 10.239.31.25410.239.31.255
1710.239.32.0/2310.239.32.1 – 10.239.33.25410.239.33.255
1810.239.34.0/2310.239.34.1 – 10.239.35.25410.239.35.255
1910.239.36.0/2310.239.36.1 – 10.239.37.25410.239.37.255
2010.239.38.0/2310.239.38.1 – 10.239.39.25410.239.39.255
2110.239.40.0/2310.239.40.1 – 10.239.41.25410.239.41.255
2210.239.42.0/2310.239.42.1 – 10.239.43.25410.239.43.255
2310.239.44.0/2310.239.44.1 – 10.239.45.25410.239.45.255
2410.239.46.0/2310.239.46.1 – 10.239.47.25410.239.47.255
2510.239.48.0/2310.239.48.1 – 10.239.49.25410.239.49.255
2610.239.50.0/2310.239.50.1 – 10.239.51.25410.239.51.255
2710.239.52.0/2310.239.52.1 – 10.239.53.25410.239.53.255
2810.239.54.0/2310.239.54.1 – 10.239.55.25410.239.55.255
2910.239.56.0/2310.239.56.1 – 10.239.57.25410.239.57.255
3010.239.58.0/2310.239.58.1 – 10.239.59.25410.239.59.255
3110.239.60.0/2310.239.60.1 – 10.239.61.25410.239.61.255
3210.239.62.0/2310.239.62.1 – 10.239.63.25410.239.63.255
3310.239.64.0/2310.239.64.1 – 10.239.65.25410.239.65.255
3410.239.66.0/2310.239.66.1 – 10.239.67.25410.239.67.255
3510.239.68.0/2310.239.68.1 – 10.239.69.25410.239.69.255
3610.239.70.0/2310.239.70.1 – 10.239.71.25410.239.71.255
3710.239.72.0/2310.239.72.1 – 10.239.73.25410.239.73.255
3810.239.74.0/2310.239.74.1 – 10.239.75.25410.239.75.255
3910.239.76.0/2310.239.76.1 – 10.239.77.25410.239.77.255
4010.239.78.0/2310.239.78.1 – 10.239.79.25410.239.79.255
4110.239.80.0/2310.239.80.1 – 10.239.81.25410.239.81.255
4210.239.82.0/2310.239.82.1 – 10.239.83.25410.239.83.255
4310.239.84.0/2310.239.84.1 – 10.239.85.25410.239.85.255
4410.239.86.0/2310.239.86.1 – 10.239.87.25410.239.87.255
4510.239.88.0/2310.239.88.1 – 10.239.89.25410.239.89.255
4610.239.90.0/2310.239.90.1 – 10.239.91.25410.239.91.255
4710.239.92.0/2310.239.92.1 – 10.239.93.25410.239.93.255
4810.239.94.0/2310.239.94.1 – 10.239.95.25410.239.95.255
4910.239.96.0/2310.239.96.1 – 10.239.97.25410.239.97.255
5010.239.98.0/2310.239.98.1 – 10.239.99.25410.239.99.255
5110.239.100.0/2310.239.100.1 – 10.239.101.25410.239.101.255
5210.239.102.0/2310.239.102.1 – 10.239.103.25410.239.103.255
5310.239.104.0/2310.239.104.1 – 10.239.105.25410.239.105.255
5410.239.106.0/2310.239.106.1 – 10.239.107.25410.239.107.255
5510.239.108.0/2310.239.108.1 – 10.239.109.25410.239.109.255
5610.239.110.0/2310.239.110.1 – 10.239.111.25410.239.111.255
5710.239.112.0/2310.239.112.1 – 10.239.113.25410.239.113.255
5810.239.114.0/2310.239.114.1 – 10.239.115.25410.239.115.255
5910.239.116.0/2310.239.116.1 – 10.239.117.25410.239.117.255
6010.239.118.0/2310.239.118.1 – 10.239.119.25410.239.119.255
6110.239.120.0/2310.239.120.1 – 10.239.121.25410.239.121.255
6210.239.122.0/2310.239.122.1 – 10.239.123.25410.239.123.255
6310.239.124.0/2310.239.124.1 – 10.239.125.25410.239.125.255
6410.239.126.0/2310.239.126.1 – 10.239.127.25410.239.127.255
6510.239.128.0/2310.239.128.1 – 10.239.129.25410.239.129.255
6610.239.130.0/2310.239.130.1 – 10.239.131.25410.239.131.255
6710.239.132.0/2310.239.132.1 – 10.239.133.25410.239.133.255
6810.239.134.0/2310.239.134.1 – 10.239.135.25410.239.135.255
6910.239.136.0/2310.239.136.1 – 10.239.137.25410.239.137.255
7010.239.138.0/2310.239.138.1 – 10.239.139.25410.239.139.255
7110.239.140.0/2310.239.140.1 – 10.239.141.25410.239.141.255
7210.239.142.0/2310.239.142.1 – 10.239.143.25410.239.143.255
7310.239.144.0/2310.239.144.1 – 10.239.145.25410.239.145.255
7410.239.146.0/2310.239.146.1 – 10.239.147.25410.239.147.255
7510.239.148.0/2310.239.148.1 – 10.239.149.25410.239.149.255
7610.239.150.0/2310.239.150.1 – 10.239.151.25410.239.151.255
7710.239.152.0/2310.239.152.1 – 10.239.153.25410.239.153.255
7810.239.154.0/2310.239.154.1 – 10.239.155.25410.239.155.255
7910.239.156.0/2310.239.156.1 – 10.239.157.25410.239.157.255
8010.239.158.0/2310.239.158.1 – 10.239.159.25410.239.159.255
8110.239.160.0/2310.239.160.1 – 10.239.161.25410.239.161.255
8210.239.162.0/2310.239.162.1 – 10.239.163.25410.239.163.255
8310.239.164.0/2310.239.164.1 – 10.239.165.25410.239.165.255
8410.239.166.0/2310.239.166.1 – 10.239.167.25410.239.167.255
8510.239.168.0/2310.239.168.1 – 10.239.169.25410.239.169.255
8610.239.170.0/2310.239.170.1 – 10.239.171.25410.239.171.255
8710.239.172.0/2310.239.172.1 – 10.239.173.25410.239.173.255
8810.239.174.0/2310.239.174.1 – 10.239.175.25410.239.175.255
8910.239.176.0/2310.239.176.1 – 10.239.177.25410.239.177.255
9010.239.178.0/2310.239.178.1 – 10.239.179.25410.239.179.255
9110.239.180.0/2310.239.180.1 – 10.239.181.25410.239.181.255
9210.239.182.0/2310.239.182.1 – 10.239.183.25410.239.183.255
9310.239.184.0/2310.239.184.1 – 10.239.185.25410.239.185.255
9410.239.186.0/2310.239.186.1 – 10.239.187.25410.239.187.255
9510.239.188.0/2310.239.188.1 – 10.239.189.25410.239.189.255
9610.239.190.0/2310.239.190.1 – 10.239.191.25410.239.191.255
9710.239.192.0/2310.239.192.1 – 10.239.193.25410.239.193.255
9810.239.194.0/2310.239.194.1 – 10.239.195.25410.239.195.255
9910.239.196.0/2310.239.196.1 – 10.239.197.25410.239.197.255
10010.239.198.0/2310.239.198.1 – 10.239.199.25410.239.199.255
10110.239.200.0/2310.239.200.1 – 10.239.201.25410.239.201.255
10210.239.202.0/2310.239.202.1 – 10.239.203.25410.239.203.255
10310.239.204.0/2310.239.204.1 – 10.239.205.25410.239.205.255
10410.239.206.0/2310.239.206.1 – 10.239.207.25410.239.207.255
10510.239.208.0/2310.239.208.1 – 10.239.209.25410.239.209.255
10610.239.210.0/2310.239.210.1 – 10.239.211.25410.239.211.255
10710.239.212.0/2310.239.212.1 – 10.239.213.25410.239.213.255
10810.239.214.0/2310.239.214.1 – 10.239.215.25410.239.215.255
10910.239.216.0/2310.239.216.1 – 10.239.217.25410.239.217.255
11010.239.218.0/2310.239.218.1 – 10.239.219.25410.239.219.255
11110.239.220.0/2310.239.220.1 – 10.239.221.25410.239.221.255
11210.239.222.0/2310.239.222.1 – 10.239.223.25410.239.223.255
11310.239.224.0/2310.239.224.1 – 10.239.225.25410.239.225.255
11410.239.226.0/2310.239.226.1 – 10.239.227.25410.239.227.255
11510.239.228.0/2310.239.228.1 – 10.239.229.25410.239.229.255
11610.239.230.0/2310.239.230.1 – 10.239.231.25410.239.231.255
11710.239.232.0/2310.239.232.1 – 10.239.233.25410.239.233.255
11810.239.234.0/2310.239.234.1 – 10.239.235.25410.239.235.255
11910.239.236.0/2310.239.236.1 – 10.239.237.25410.239.237.255
12010.239.238.0/2310.239.238.1 – 10.239.239.25410.239.239.255
12110.239.240.0/2310.239.240.1 – 10.239.241.25410.239.241.255
12210.239.242.0/2310.239.242.1 – 10.239.243.25410.239.243.255
12310.239.244.0/2310.239.244.1 – 10.239.245.25410.239.245.255
12410.239.246.0/2310.239.246.1 – 10.239.247.25410.239.247.255
12510.239.248.0/2310.239.248.1 – 10.239.249.25410.239.249.255
12610.239.250.0/2310.239.250.1 – 10.239.251.25410.239.251.255
12710.239.252.0/2310.239.252.1 – 10.239.253.25410.239.253.255
12810.239.254.0/2310.239.254.1 – 10.239.255.25410.239.255.255
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 →