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)10.30.0.0/16
network10.30.0.0/16
broadcast10.30.255.255
first host10.30.0.1
last host10.30.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.30.0.0/16
address00001010.00011110.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.00011110.00000000.00000000
broadcast00001010.00011110.11111111.11111111
green = network part, grey = host part
hex0x0a1e0000
decimal169738240
reverse dns0.0.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.30.0.0/2310.30.0.1 – 10.30.1.25410.30.1.255
210.30.2.0/2310.30.2.1 – 10.30.3.25410.30.3.255
310.30.4.0/2310.30.4.1 – 10.30.5.25410.30.5.255
410.30.6.0/2310.30.6.1 – 10.30.7.25410.30.7.255
510.30.8.0/2310.30.8.1 – 10.30.9.25410.30.9.255
610.30.10.0/2310.30.10.1 – 10.30.11.25410.30.11.255
710.30.12.0/2310.30.12.1 – 10.30.13.25410.30.13.255
810.30.14.0/2310.30.14.1 – 10.30.15.25410.30.15.255
910.30.16.0/2310.30.16.1 – 10.30.17.25410.30.17.255
1010.30.18.0/2310.30.18.1 – 10.30.19.25410.30.19.255
1110.30.20.0/2310.30.20.1 – 10.30.21.25410.30.21.255
1210.30.22.0/2310.30.22.1 – 10.30.23.25410.30.23.255
1310.30.24.0/2310.30.24.1 – 10.30.25.25410.30.25.255
1410.30.26.0/2310.30.26.1 – 10.30.27.25410.30.27.255
1510.30.28.0/2310.30.28.1 – 10.30.29.25410.30.29.255
1610.30.30.0/2310.30.30.1 – 10.30.31.25410.30.31.255
1710.30.32.0/2310.30.32.1 – 10.30.33.25410.30.33.255
1810.30.34.0/2310.30.34.1 – 10.30.35.25410.30.35.255
1910.30.36.0/2310.30.36.1 – 10.30.37.25410.30.37.255
2010.30.38.0/2310.30.38.1 – 10.30.39.25410.30.39.255
2110.30.40.0/2310.30.40.1 – 10.30.41.25410.30.41.255
2210.30.42.0/2310.30.42.1 – 10.30.43.25410.30.43.255
2310.30.44.0/2310.30.44.1 – 10.30.45.25410.30.45.255
2410.30.46.0/2310.30.46.1 – 10.30.47.25410.30.47.255
2510.30.48.0/2310.30.48.1 – 10.30.49.25410.30.49.255
2610.30.50.0/2310.30.50.1 – 10.30.51.25410.30.51.255
2710.30.52.0/2310.30.52.1 – 10.30.53.25410.30.53.255
2810.30.54.0/2310.30.54.1 – 10.30.55.25410.30.55.255
2910.30.56.0/2310.30.56.1 – 10.30.57.25410.30.57.255
3010.30.58.0/2310.30.58.1 – 10.30.59.25410.30.59.255
3110.30.60.0/2310.30.60.1 – 10.30.61.25410.30.61.255
3210.30.62.0/2310.30.62.1 – 10.30.63.25410.30.63.255
3310.30.64.0/2310.30.64.1 – 10.30.65.25410.30.65.255
3410.30.66.0/2310.30.66.1 – 10.30.67.25410.30.67.255
3510.30.68.0/2310.30.68.1 – 10.30.69.25410.30.69.255
3610.30.70.0/2310.30.70.1 – 10.30.71.25410.30.71.255
3710.30.72.0/2310.30.72.1 – 10.30.73.25410.30.73.255
3810.30.74.0/2310.30.74.1 – 10.30.75.25410.30.75.255
3910.30.76.0/2310.30.76.1 – 10.30.77.25410.30.77.255
4010.30.78.0/2310.30.78.1 – 10.30.79.25410.30.79.255
4110.30.80.0/2310.30.80.1 – 10.30.81.25410.30.81.255
4210.30.82.0/2310.30.82.1 – 10.30.83.25410.30.83.255
4310.30.84.0/2310.30.84.1 – 10.30.85.25410.30.85.255
4410.30.86.0/2310.30.86.1 – 10.30.87.25410.30.87.255
4510.30.88.0/2310.30.88.1 – 10.30.89.25410.30.89.255
4610.30.90.0/2310.30.90.1 – 10.30.91.25410.30.91.255
4710.30.92.0/2310.30.92.1 – 10.30.93.25410.30.93.255
4810.30.94.0/2310.30.94.1 – 10.30.95.25410.30.95.255
4910.30.96.0/2310.30.96.1 – 10.30.97.25410.30.97.255
5010.30.98.0/2310.30.98.1 – 10.30.99.25410.30.99.255
5110.30.100.0/2310.30.100.1 – 10.30.101.25410.30.101.255
5210.30.102.0/2310.30.102.1 – 10.30.103.25410.30.103.255
5310.30.104.0/2310.30.104.1 – 10.30.105.25410.30.105.255
5410.30.106.0/2310.30.106.1 – 10.30.107.25410.30.107.255
5510.30.108.0/2310.30.108.1 – 10.30.109.25410.30.109.255
5610.30.110.0/2310.30.110.1 – 10.30.111.25410.30.111.255
5710.30.112.0/2310.30.112.1 – 10.30.113.25410.30.113.255
5810.30.114.0/2310.30.114.1 – 10.30.115.25410.30.115.255
5910.30.116.0/2310.30.116.1 – 10.30.117.25410.30.117.255
6010.30.118.0/2310.30.118.1 – 10.30.119.25410.30.119.255
6110.30.120.0/2310.30.120.1 – 10.30.121.25410.30.121.255
6210.30.122.0/2310.30.122.1 – 10.30.123.25410.30.123.255
6310.30.124.0/2310.30.124.1 – 10.30.125.25410.30.125.255
6410.30.126.0/2310.30.126.1 – 10.30.127.25410.30.127.255
6510.30.128.0/2310.30.128.1 – 10.30.129.25410.30.129.255
6610.30.130.0/2310.30.130.1 – 10.30.131.25410.30.131.255
6710.30.132.0/2310.30.132.1 – 10.30.133.25410.30.133.255
6810.30.134.0/2310.30.134.1 – 10.30.135.25410.30.135.255
6910.30.136.0/2310.30.136.1 – 10.30.137.25410.30.137.255
7010.30.138.0/2310.30.138.1 – 10.30.139.25410.30.139.255
7110.30.140.0/2310.30.140.1 – 10.30.141.25410.30.141.255
7210.30.142.0/2310.30.142.1 – 10.30.143.25410.30.143.255
7310.30.144.0/2310.30.144.1 – 10.30.145.25410.30.145.255
7410.30.146.0/2310.30.146.1 – 10.30.147.25410.30.147.255
7510.30.148.0/2310.30.148.1 – 10.30.149.25410.30.149.255
7610.30.150.0/2310.30.150.1 – 10.30.151.25410.30.151.255
7710.30.152.0/2310.30.152.1 – 10.30.153.25410.30.153.255
7810.30.154.0/2310.30.154.1 – 10.30.155.25410.30.155.255
7910.30.156.0/2310.30.156.1 – 10.30.157.25410.30.157.255
8010.30.158.0/2310.30.158.1 – 10.30.159.25410.30.159.255
8110.30.160.0/2310.30.160.1 – 10.30.161.25410.30.161.255
8210.30.162.0/2310.30.162.1 – 10.30.163.25410.30.163.255
8310.30.164.0/2310.30.164.1 – 10.30.165.25410.30.165.255
8410.30.166.0/2310.30.166.1 – 10.30.167.25410.30.167.255
8510.30.168.0/2310.30.168.1 – 10.30.169.25410.30.169.255
8610.30.170.0/2310.30.170.1 – 10.30.171.25410.30.171.255
8710.30.172.0/2310.30.172.1 – 10.30.173.25410.30.173.255
8810.30.174.0/2310.30.174.1 – 10.30.175.25410.30.175.255
8910.30.176.0/2310.30.176.1 – 10.30.177.25410.30.177.255
9010.30.178.0/2310.30.178.1 – 10.30.179.25410.30.179.255
9110.30.180.0/2310.30.180.1 – 10.30.181.25410.30.181.255
9210.30.182.0/2310.30.182.1 – 10.30.183.25410.30.183.255
9310.30.184.0/2310.30.184.1 – 10.30.185.25410.30.185.255
9410.30.186.0/2310.30.186.1 – 10.30.187.25410.30.187.255
9510.30.188.0/2310.30.188.1 – 10.30.189.25410.30.189.255
9610.30.190.0/2310.30.190.1 – 10.30.191.25410.30.191.255
9710.30.192.0/2310.30.192.1 – 10.30.193.25410.30.193.255
9810.30.194.0/2310.30.194.1 – 10.30.195.25410.30.195.255
9910.30.196.0/2310.30.196.1 – 10.30.197.25410.30.197.255
10010.30.198.0/2310.30.198.1 – 10.30.199.25410.30.199.255
10110.30.200.0/2310.30.200.1 – 10.30.201.25410.30.201.255
10210.30.202.0/2310.30.202.1 – 10.30.203.25410.30.203.255
10310.30.204.0/2310.30.204.1 – 10.30.205.25410.30.205.255
10410.30.206.0/2310.30.206.1 – 10.30.207.25410.30.207.255
10510.30.208.0/2310.30.208.1 – 10.30.209.25410.30.209.255
10610.30.210.0/2310.30.210.1 – 10.30.211.25410.30.211.255
10710.30.212.0/2310.30.212.1 – 10.30.213.25410.30.213.255
10810.30.214.0/2310.30.214.1 – 10.30.215.25410.30.215.255
10910.30.216.0/2310.30.216.1 – 10.30.217.25410.30.217.255
11010.30.218.0/2310.30.218.1 – 10.30.219.25410.30.219.255
11110.30.220.0/2310.30.220.1 – 10.30.221.25410.30.221.255
11210.30.222.0/2310.30.222.1 – 10.30.223.25410.30.223.255
11310.30.224.0/2310.30.224.1 – 10.30.225.25410.30.225.255
11410.30.226.0/2310.30.226.1 – 10.30.227.25410.30.227.255
11510.30.228.0/2310.30.228.1 – 10.30.229.25410.30.229.255
11610.30.230.0/2310.30.230.1 – 10.30.231.25410.30.231.255
11710.30.232.0/2310.30.232.1 – 10.30.233.25410.30.233.255
11810.30.234.0/2310.30.234.1 – 10.30.235.25410.30.235.255
11910.30.236.0/2310.30.236.1 – 10.30.237.25410.30.237.255
12010.30.238.0/2310.30.238.1 – 10.30.239.25410.30.239.255
12110.30.240.0/2310.30.240.1 – 10.30.241.25410.30.241.255
12210.30.242.0/2310.30.242.1 – 10.30.243.25410.30.243.255
12310.30.244.0/2310.30.244.1 – 10.30.245.25410.30.245.255
12410.30.246.0/2310.30.246.1 – 10.30.247.25410.30.247.255
12510.30.248.0/2310.30.248.1 – 10.30.249.25410.30.249.255
12610.30.250.0/2310.30.250.1 – 10.30.251.25410.30.251.255
12710.30.252.0/2310.30.252.1 – 10.30.253.25410.30.253.255
12810.30.254.0/2310.30.254.1 – 10.30.255.25410.30.255.255
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 →