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)10.181.0.0/16
network10.181.0.0/16
broadcast10.181.255.255
first host10.181.0.1
last host10.181.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.181.0.0/16
address00001010.10110101.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.10110101.00000000.00000000
broadcast00001010.10110101.11111111.11111111
green = network part, grey = host part
hex0x0ab50000
decimal179634176
reverse dns0.0.181.10.in-addr.arpa
ipv4-mapped::ffff:ab5:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.181.0.0/2310.181.0.1 – 10.181.1.25410.181.1.255
210.181.2.0/2310.181.2.1 – 10.181.3.25410.181.3.255
310.181.4.0/2310.181.4.1 – 10.181.5.25410.181.5.255
410.181.6.0/2310.181.6.1 – 10.181.7.25410.181.7.255
510.181.8.0/2310.181.8.1 – 10.181.9.25410.181.9.255
610.181.10.0/2310.181.10.1 – 10.181.11.25410.181.11.255
710.181.12.0/2310.181.12.1 – 10.181.13.25410.181.13.255
810.181.14.0/2310.181.14.1 – 10.181.15.25410.181.15.255
910.181.16.0/2310.181.16.1 – 10.181.17.25410.181.17.255
1010.181.18.0/2310.181.18.1 – 10.181.19.25410.181.19.255
1110.181.20.0/2310.181.20.1 – 10.181.21.25410.181.21.255
1210.181.22.0/2310.181.22.1 – 10.181.23.25410.181.23.255
1310.181.24.0/2310.181.24.1 – 10.181.25.25410.181.25.255
1410.181.26.0/2310.181.26.1 – 10.181.27.25410.181.27.255
1510.181.28.0/2310.181.28.1 – 10.181.29.25410.181.29.255
1610.181.30.0/2310.181.30.1 – 10.181.31.25410.181.31.255
1710.181.32.0/2310.181.32.1 – 10.181.33.25410.181.33.255
1810.181.34.0/2310.181.34.1 – 10.181.35.25410.181.35.255
1910.181.36.0/2310.181.36.1 – 10.181.37.25410.181.37.255
2010.181.38.0/2310.181.38.1 – 10.181.39.25410.181.39.255
2110.181.40.0/2310.181.40.1 – 10.181.41.25410.181.41.255
2210.181.42.0/2310.181.42.1 – 10.181.43.25410.181.43.255
2310.181.44.0/2310.181.44.1 – 10.181.45.25410.181.45.255
2410.181.46.0/2310.181.46.1 – 10.181.47.25410.181.47.255
2510.181.48.0/2310.181.48.1 – 10.181.49.25410.181.49.255
2610.181.50.0/2310.181.50.1 – 10.181.51.25410.181.51.255
2710.181.52.0/2310.181.52.1 – 10.181.53.25410.181.53.255
2810.181.54.0/2310.181.54.1 – 10.181.55.25410.181.55.255
2910.181.56.0/2310.181.56.1 – 10.181.57.25410.181.57.255
3010.181.58.0/2310.181.58.1 – 10.181.59.25410.181.59.255
3110.181.60.0/2310.181.60.1 – 10.181.61.25410.181.61.255
3210.181.62.0/2310.181.62.1 – 10.181.63.25410.181.63.255
3310.181.64.0/2310.181.64.1 – 10.181.65.25410.181.65.255
3410.181.66.0/2310.181.66.1 – 10.181.67.25410.181.67.255
3510.181.68.0/2310.181.68.1 – 10.181.69.25410.181.69.255
3610.181.70.0/2310.181.70.1 – 10.181.71.25410.181.71.255
3710.181.72.0/2310.181.72.1 – 10.181.73.25410.181.73.255
3810.181.74.0/2310.181.74.1 – 10.181.75.25410.181.75.255
3910.181.76.0/2310.181.76.1 – 10.181.77.25410.181.77.255
4010.181.78.0/2310.181.78.1 – 10.181.79.25410.181.79.255
4110.181.80.0/2310.181.80.1 – 10.181.81.25410.181.81.255
4210.181.82.0/2310.181.82.1 – 10.181.83.25410.181.83.255
4310.181.84.0/2310.181.84.1 – 10.181.85.25410.181.85.255
4410.181.86.0/2310.181.86.1 – 10.181.87.25410.181.87.255
4510.181.88.0/2310.181.88.1 – 10.181.89.25410.181.89.255
4610.181.90.0/2310.181.90.1 – 10.181.91.25410.181.91.255
4710.181.92.0/2310.181.92.1 – 10.181.93.25410.181.93.255
4810.181.94.0/2310.181.94.1 – 10.181.95.25410.181.95.255
4910.181.96.0/2310.181.96.1 – 10.181.97.25410.181.97.255
5010.181.98.0/2310.181.98.1 – 10.181.99.25410.181.99.255
5110.181.100.0/2310.181.100.1 – 10.181.101.25410.181.101.255
5210.181.102.0/2310.181.102.1 – 10.181.103.25410.181.103.255
5310.181.104.0/2310.181.104.1 – 10.181.105.25410.181.105.255
5410.181.106.0/2310.181.106.1 – 10.181.107.25410.181.107.255
5510.181.108.0/2310.181.108.1 – 10.181.109.25410.181.109.255
5610.181.110.0/2310.181.110.1 – 10.181.111.25410.181.111.255
5710.181.112.0/2310.181.112.1 – 10.181.113.25410.181.113.255
5810.181.114.0/2310.181.114.1 – 10.181.115.25410.181.115.255
5910.181.116.0/2310.181.116.1 – 10.181.117.25410.181.117.255
6010.181.118.0/2310.181.118.1 – 10.181.119.25410.181.119.255
6110.181.120.0/2310.181.120.1 – 10.181.121.25410.181.121.255
6210.181.122.0/2310.181.122.1 – 10.181.123.25410.181.123.255
6310.181.124.0/2310.181.124.1 – 10.181.125.25410.181.125.255
6410.181.126.0/2310.181.126.1 – 10.181.127.25410.181.127.255
6510.181.128.0/2310.181.128.1 – 10.181.129.25410.181.129.255
6610.181.130.0/2310.181.130.1 – 10.181.131.25410.181.131.255
6710.181.132.0/2310.181.132.1 – 10.181.133.25410.181.133.255
6810.181.134.0/2310.181.134.1 – 10.181.135.25410.181.135.255
6910.181.136.0/2310.181.136.1 – 10.181.137.25410.181.137.255
7010.181.138.0/2310.181.138.1 – 10.181.139.25410.181.139.255
7110.181.140.0/2310.181.140.1 – 10.181.141.25410.181.141.255
7210.181.142.0/2310.181.142.1 – 10.181.143.25410.181.143.255
7310.181.144.0/2310.181.144.1 – 10.181.145.25410.181.145.255
7410.181.146.0/2310.181.146.1 – 10.181.147.25410.181.147.255
7510.181.148.0/2310.181.148.1 – 10.181.149.25410.181.149.255
7610.181.150.0/2310.181.150.1 – 10.181.151.25410.181.151.255
7710.181.152.0/2310.181.152.1 – 10.181.153.25410.181.153.255
7810.181.154.0/2310.181.154.1 – 10.181.155.25410.181.155.255
7910.181.156.0/2310.181.156.1 – 10.181.157.25410.181.157.255
8010.181.158.0/2310.181.158.1 – 10.181.159.25410.181.159.255
8110.181.160.0/2310.181.160.1 – 10.181.161.25410.181.161.255
8210.181.162.0/2310.181.162.1 – 10.181.163.25410.181.163.255
8310.181.164.0/2310.181.164.1 – 10.181.165.25410.181.165.255
8410.181.166.0/2310.181.166.1 – 10.181.167.25410.181.167.255
8510.181.168.0/2310.181.168.1 – 10.181.169.25410.181.169.255
8610.181.170.0/2310.181.170.1 – 10.181.171.25410.181.171.255
8710.181.172.0/2310.181.172.1 – 10.181.173.25410.181.173.255
8810.181.174.0/2310.181.174.1 – 10.181.175.25410.181.175.255
8910.181.176.0/2310.181.176.1 – 10.181.177.25410.181.177.255
9010.181.178.0/2310.181.178.1 – 10.181.179.25410.181.179.255
9110.181.180.0/2310.181.180.1 – 10.181.181.25410.181.181.255
9210.181.182.0/2310.181.182.1 – 10.181.183.25410.181.183.255
9310.181.184.0/2310.181.184.1 – 10.181.185.25410.181.185.255
9410.181.186.0/2310.181.186.1 – 10.181.187.25410.181.187.255
9510.181.188.0/2310.181.188.1 – 10.181.189.25410.181.189.255
9610.181.190.0/2310.181.190.1 – 10.181.191.25410.181.191.255
9710.181.192.0/2310.181.192.1 – 10.181.193.25410.181.193.255
9810.181.194.0/2310.181.194.1 – 10.181.195.25410.181.195.255
9910.181.196.0/2310.181.196.1 – 10.181.197.25410.181.197.255
10010.181.198.0/2310.181.198.1 – 10.181.199.25410.181.199.255
10110.181.200.0/2310.181.200.1 – 10.181.201.25410.181.201.255
10210.181.202.0/2310.181.202.1 – 10.181.203.25410.181.203.255
10310.181.204.0/2310.181.204.1 – 10.181.205.25410.181.205.255
10410.181.206.0/2310.181.206.1 – 10.181.207.25410.181.207.255
10510.181.208.0/2310.181.208.1 – 10.181.209.25410.181.209.255
10610.181.210.0/2310.181.210.1 – 10.181.211.25410.181.211.255
10710.181.212.0/2310.181.212.1 – 10.181.213.25410.181.213.255
10810.181.214.0/2310.181.214.1 – 10.181.215.25410.181.215.255
10910.181.216.0/2310.181.216.1 – 10.181.217.25410.181.217.255
11010.181.218.0/2310.181.218.1 – 10.181.219.25410.181.219.255
11110.181.220.0/2310.181.220.1 – 10.181.221.25410.181.221.255
11210.181.222.0/2310.181.222.1 – 10.181.223.25410.181.223.255
11310.181.224.0/2310.181.224.1 – 10.181.225.25410.181.225.255
11410.181.226.0/2310.181.226.1 – 10.181.227.25410.181.227.255
11510.181.228.0/2310.181.228.1 – 10.181.229.25410.181.229.255
11610.181.230.0/2310.181.230.1 – 10.181.231.25410.181.231.255
11710.181.232.0/2310.181.232.1 – 10.181.233.25410.181.233.255
11810.181.234.0/2310.181.234.1 – 10.181.235.25410.181.235.255
11910.181.236.0/2310.181.236.1 – 10.181.237.25410.181.237.255
12010.181.238.0/2310.181.238.1 – 10.181.239.25410.181.239.255
12110.181.240.0/2310.181.240.1 – 10.181.241.25410.181.241.255
12210.181.242.0/2310.181.242.1 – 10.181.243.25410.181.243.255
12310.181.244.0/2310.181.244.1 – 10.181.245.25410.181.245.255
12410.181.246.0/2310.181.246.1 – 10.181.247.25410.181.247.255
12510.181.248.0/2310.181.248.1 – 10.181.249.25410.181.249.255
12610.181.250.0/2310.181.250.1 – 10.181.251.25410.181.251.255
12710.181.252.0/2310.181.252.1 – 10.181.253.25410.181.253.255
12810.181.254.0/2310.181.254.1 – 10.181.255.25410.181.255.255
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 →