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)10.37.0.0/16
network10.37.0.0/16
broadcast10.37.255.255
first host10.37.0.1
last host10.37.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.37.0.0/16
address00001010.00100101.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.00100101.00000000.00000000
broadcast00001010.00100101.11111111.11111111
green = network part, grey = host part
hex0x0a250000
decimal170196992
reverse dns0.0.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.37.0.0/2310.37.0.1 – 10.37.1.25410.37.1.255
210.37.2.0/2310.37.2.1 – 10.37.3.25410.37.3.255
310.37.4.0/2310.37.4.1 – 10.37.5.25410.37.5.255
410.37.6.0/2310.37.6.1 – 10.37.7.25410.37.7.255
510.37.8.0/2310.37.8.1 – 10.37.9.25410.37.9.255
610.37.10.0/2310.37.10.1 – 10.37.11.25410.37.11.255
710.37.12.0/2310.37.12.1 – 10.37.13.25410.37.13.255
810.37.14.0/2310.37.14.1 – 10.37.15.25410.37.15.255
910.37.16.0/2310.37.16.1 – 10.37.17.25410.37.17.255
1010.37.18.0/2310.37.18.1 – 10.37.19.25410.37.19.255
1110.37.20.0/2310.37.20.1 – 10.37.21.25410.37.21.255
1210.37.22.0/2310.37.22.1 – 10.37.23.25410.37.23.255
1310.37.24.0/2310.37.24.1 – 10.37.25.25410.37.25.255
1410.37.26.0/2310.37.26.1 – 10.37.27.25410.37.27.255
1510.37.28.0/2310.37.28.1 – 10.37.29.25410.37.29.255
1610.37.30.0/2310.37.30.1 – 10.37.31.25410.37.31.255
1710.37.32.0/2310.37.32.1 – 10.37.33.25410.37.33.255
1810.37.34.0/2310.37.34.1 – 10.37.35.25410.37.35.255
1910.37.36.0/2310.37.36.1 – 10.37.37.25410.37.37.255
2010.37.38.0/2310.37.38.1 – 10.37.39.25410.37.39.255
2110.37.40.0/2310.37.40.1 – 10.37.41.25410.37.41.255
2210.37.42.0/2310.37.42.1 – 10.37.43.25410.37.43.255
2310.37.44.0/2310.37.44.1 – 10.37.45.25410.37.45.255
2410.37.46.0/2310.37.46.1 – 10.37.47.25410.37.47.255
2510.37.48.0/2310.37.48.1 – 10.37.49.25410.37.49.255
2610.37.50.0/2310.37.50.1 – 10.37.51.25410.37.51.255
2710.37.52.0/2310.37.52.1 – 10.37.53.25410.37.53.255
2810.37.54.0/2310.37.54.1 – 10.37.55.25410.37.55.255
2910.37.56.0/2310.37.56.1 – 10.37.57.25410.37.57.255
3010.37.58.0/2310.37.58.1 – 10.37.59.25410.37.59.255
3110.37.60.0/2310.37.60.1 – 10.37.61.25410.37.61.255
3210.37.62.0/2310.37.62.1 – 10.37.63.25410.37.63.255
3310.37.64.0/2310.37.64.1 – 10.37.65.25410.37.65.255
3410.37.66.0/2310.37.66.1 – 10.37.67.25410.37.67.255
3510.37.68.0/2310.37.68.1 – 10.37.69.25410.37.69.255
3610.37.70.0/2310.37.70.1 – 10.37.71.25410.37.71.255
3710.37.72.0/2310.37.72.1 – 10.37.73.25410.37.73.255
3810.37.74.0/2310.37.74.1 – 10.37.75.25410.37.75.255
3910.37.76.0/2310.37.76.1 – 10.37.77.25410.37.77.255
4010.37.78.0/2310.37.78.1 – 10.37.79.25410.37.79.255
4110.37.80.0/2310.37.80.1 – 10.37.81.25410.37.81.255
4210.37.82.0/2310.37.82.1 – 10.37.83.25410.37.83.255
4310.37.84.0/2310.37.84.1 – 10.37.85.25410.37.85.255
4410.37.86.0/2310.37.86.1 – 10.37.87.25410.37.87.255
4510.37.88.0/2310.37.88.1 – 10.37.89.25410.37.89.255
4610.37.90.0/2310.37.90.1 – 10.37.91.25410.37.91.255
4710.37.92.0/2310.37.92.1 – 10.37.93.25410.37.93.255
4810.37.94.0/2310.37.94.1 – 10.37.95.25410.37.95.255
4910.37.96.0/2310.37.96.1 – 10.37.97.25410.37.97.255
5010.37.98.0/2310.37.98.1 – 10.37.99.25410.37.99.255
5110.37.100.0/2310.37.100.1 – 10.37.101.25410.37.101.255
5210.37.102.0/2310.37.102.1 – 10.37.103.25410.37.103.255
5310.37.104.0/2310.37.104.1 – 10.37.105.25410.37.105.255
5410.37.106.0/2310.37.106.1 – 10.37.107.25410.37.107.255
5510.37.108.0/2310.37.108.1 – 10.37.109.25410.37.109.255
5610.37.110.0/2310.37.110.1 – 10.37.111.25410.37.111.255
5710.37.112.0/2310.37.112.1 – 10.37.113.25410.37.113.255
5810.37.114.0/2310.37.114.1 – 10.37.115.25410.37.115.255
5910.37.116.0/2310.37.116.1 – 10.37.117.25410.37.117.255
6010.37.118.0/2310.37.118.1 – 10.37.119.25410.37.119.255
6110.37.120.0/2310.37.120.1 – 10.37.121.25410.37.121.255
6210.37.122.0/2310.37.122.1 – 10.37.123.25410.37.123.255
6310.37.124.0/2310.37.124.1 – 10.37.125.25410.37.125.255
6410.37.126.0/2310.37.126.1 – 10.37.127.25410.37.127.255
6510.37.128.0/2310.37.128.1 – 10.37.129.25410.37.129.255
6610.37.130.0/2310.37.130.1 – 10.37.131.25410.37.131.255
6710.37.132.0/2310.37.132.1 – 10.37.133.25410.37.133.255
6810.37.134.0/2310.37.134.1 – 10.37.135.25410.37.135.255
6910.37.136.0/2310.37.136.1 – 10.37.137.25410.37.137.255
7010.37.138.0/2310.37.138.1 – 10.37.139.25410.37.139.255
7110.37.140.0/2310.37.140.1 – 10.37.141.25410.37.141.255
7210.37.142.0/2310.37.142.1 – 10.37.143.25410.37.143.255
7310.37.144.0/2310.37.144.1 – 10.37.145.25410.37.145.255
7410.37.146.0/2310.37.146.1 – 10.37.147.25410.37.147.255
7510.37.148.0/2310.37.148.1 – 10.37.149.25410.37.149.255
7610.37.150.0/2310.37.150.1 – 10.37.151.25410.37.151.255
7710.37.152.0/2310.37.152.1 – 10.37.153.25410.37.153.255
7810.37.154.0/2310.37.154.1 – 10.37.155.25410.37.155.255
7910.37.156.0/2310.37.156.1 – 10.37.157.25410.37.157.255
8010.37.158.0/2310.37.158.1 – 10.37.159.25410.37.159.255
8110.37.160.0/2310.37.160.1 – 10.37.161.25410.37.161.255
8210.37.162.0/2310.37.162.1 – 10.37.163.25410.37.163.255
8310.37.164.0/2310.37.164.1 – 10.37.165.25410.37.165.255
8410.37.166.0/2310.37.166.1 – 10.37.167.25410.37.167.255
8510.37.168.0/2310.37.168.1 – 10.37.169.25410.37.169.255
8610.37.170.0/2310.37.170.1 – 10.37.171.25410.37.171.255
8710.37.172.0/2310.37.172.1 – 10.37.173.25410.37.173.255
8810.37.174.0/2310.37.174.1 – 10.37.175.25410.37.175.255
8910.37.176.0/2310.37.176.1 – 10.37.177.25410.37.177.255
9010.37.178.0/2310.37.178.1 – 10.37.179.25410.37.179.255
9110.37.180.0/2310.37.180.1 – 10.37.181.25410.37.181.255
9210.37.182.0/2310.37.182.1 – 10.37.183.25410.37.183.255
9310.37.184.0/2310.37.184.1 – 10.37.185.25410.37.185.255
9410.37.186.0/2310.37.186.1 – 10.37.187.25410.37.187.255
9510.37.188.0/2310.37.188.1 – 10.37.189.25410.37.189.255
9610.37.190.0/2310.37.190.1 – 10.37.191.25410.37.191.255
9710.37.192.0/2310.37.192.1 – 10.37.193.25410.37.193.255
9810.37.194.0/2310.37.194.1 – 10.37.195.25410.37.195.255
9910.37.196.0/2310.37.196.1 – 10.37.197.25410.37.197.255
10010.37.198.0/2310.37.198.1 – 10.37.199.25410.37.199.255
10110.37.200.0/2310.37.200.1 – 10.37.201.25410.37.201.255
10210.37.202.0/2310.37.202.1 – 10.37.203.25410.37.203.255
10310.37.204.0/2310.37.204.1 – 10.37.205.25410.37.205.255
10410.37.206.0/2310.37.206.1 – 10.37.207.25410.37.207.255
10510.37.208.0/2310.37.208.1 – 10.37.209.25410.37.209.255
10610.37.210.0/2310.37.210.1 – 10.37.211.25410.37.211.255
10710.37.212.0/2310.37.212.1 – 10.37.213.25410.37.213.255
10810.37.214.0/2310.37.214.1 – 10.37.215.25410.37.215.255
10910.37.216.0/2310.37.216.1 – 10.37.217.25410.37.217.255
11010.37.218.0/2310.37.218.1 – 10.37.219.25410.37.219.255
11110.37.220.0/2310.37.220.1 – 10.37.221.25410.37.221.255
11210.37.222.0/2310.37.222.1 – 10.37.223.25410.37.223.255
11310.37.224.0/2310.37.224.1 – 10.37.225.25410.37.225.255
11410.37.226.0/2310.37.226.1 – 10.37.227.25410.37.227.255
11510.37.228.0/2310.37.228.1 – 10.37.229.25410.37.229.255
11610.37.230.0/2310.37.230.1 – 10.37.231.25410.37.231.255
11710.37.232.0/2310.37.232.1 – 10.37.233.25410.37.233.255
11810.37.234.0/2310.37.234.1 – 10.37.235.25410.37.235.255
11910.37.236.0/2310.37.236.1 – 10.37.237.25410.37.237.255
12010.37.238.0/2310.37.238.1 – 10.37.239.25410.37.239.255
12110.37.240.0/2310.37.240.1 – 10.37.241.25410.37.241.255
12210.37.242.0/2310.37.242.1 – 10.37.243.25410.37.243.255
12310.37.244.0/2310.37.244.1 – 10.37.245.25410.37.245.255
12410.37.246.0/2310.37.246.1 – 10.37.247.25410.37.247.255
12510.37.248.0/2310.37.248.1 – 10.37.249.25410.37.249.255
12610.37.250.0/2310.37.250.1 – 10.37.251.25410.37.251.255
12710.37.252.0/2310.37.252.1 – 10.37.253.25410.37.253.255
12810.37.254.0/2310.37.254.1 – 10.37.255.25410.37.255.255
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 →