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)10.207.0.0/16
network10.207.0.0/16
broadcast10.207.255.255
first host10.207.0.1
last host10.207.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.207.0.0/16
address00001010.11001111.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.11001111.00000000.00000000
broadcast00001010.11001111.11111111.11111111
green = network part, grey = host part
hex0x0acf0000
decimal181338112
reverse dns0.0.207.10.in-addr.arpa
ipv4-mapped::ffff:acf:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.207.0.0/2310.207.0.1 – 10.207.1.25410.207.1.255
210.207.2.0/2310.207.2.1 – 10.207.3.25410.207.3.255
310.207.4.0/2310.207.4.1 – 10.207.5.25410.207.5.255
410.207.6.0/2310.207.6.1 – 10.207.7.25410.207.7.255
510.207.8.0/2310.207.8.1 – 10.207.9.25410.207.9.255
610.207.10.0/2310.207.10.1 – 10.207.11.25410.207.11.255
710.207.12.0/2310.207.12.1 – 10.207.13.25410.207.13.255
810.207.14.0/2310.207.14.1 – 10.207.15.25410.207.15.255
910.207.16.0/2310.207.16.1 – 10.207.17.25410.207.17.255
1010.207.18.0/2310.207.18.1 – 10.207.19.25410.207.19.255
1110.207.20.0/2310.207.20.1 – 10.207.21.25410.207.21.255
1210.207.22.0/2310.207.22.1 – 10.207.23.25410.207.23.255
1310.207.24.0/2310.207.24.1 – 10.207.25.25410.207.25.255
1410.207.26.0/2310.207.26.1 – 10.207.27.25410.207.27.255
1510.207.28.0/2310.207.28.1 – 10.207.29.25410.207.29.255
1610.207.30.0/2310.207.30.1 – 10.207.31.25410.207.31.255
1710.207.32.0/2310.207.32.1 – 10.207.33.25410.207.33.255
1810.207.34.0/2310.207.34.1 – 10.207.35.25410.207.35.255
1910.207.36.0/2310.207.36.1 – 10.207.37.25410.207.37.255
2010.207.38.0/2310.207.38.1 – 10.207.39.25410.207.39.255
2110.207.40.0/2310.207.40.1 – 10.207.41.25410.207.41.255
2210.207.42.0/2310.207.42.1 – 10.207.43.25410.207.43.255
2310.207.44.0/2310.207.44.1 – 10.207.45.25410.207.45.255
2410.207.46.0/2310.207.46.1 – 10.207.47.25410.207.47.255
2510.207.48.0/2310.207.48.1 – 10.207.49.25410.207.49.255
2610.207.50.0/2310.207.50.1 – 10.207.51.25410.207.51.255
2710.207.52.0/2310.207.52.1 – 10.207.53.25410.207.53.255
2810.207.54.0/2310.207.54.1 – 10.207.55.25410.207.55.255
2910.207.56.0/2310.207.56.1 – 10.207.57.25410.207.57.255
3010.207.58.0/2310.207.58.1 – 10.207.59.25410.207.59.255
3110.207.60.0/2310.207.60.1 – 10.207.61.25410.207.61.255
3210.207.62.0/2310.207.62.1 – 10.207.63.25410.207.63.255
3310.207.64.0/2310.207.64.1 – 10.207.65.25410.207.65.255
3410.207.66.0/2310.207.66.1 – 10.207.67.25410.207.67.255
3510.207.68.0/2310.207.68.1 – 10.207.69.25410.207.69.255
3610.207.70.0/2310.207.70.1 – 10.207.71.25410.207.71.255
3710.207.72.0/2310.207.72.1 – 10.207.73.25410.207.73.255
3810.207.74.0/2310.207.74.1 – 10.207.75.25410.207.75.255
3910.207.76.0/2310.207.76.1 – 10.207.77.25410.207.77.255
4010.207.78.0/2310.207.78.1 – 10.207.79.25410.207.79.255
4110.207.80.0/2310.207.80.1 – 10.207.81.25410.207.81.255
4210.207.82.0/2310.207.82.1 – 10.207.83.25410.207.83.255
4310.207.84.0/2310.207.84.1 – 10.207.85.25410.207.85.255
4410.207.86.0/2310.207.86.1 – 10.207.87.25410.207.87.255
4510.207.88.0/2310.207.88.1 – 10.207.89.25410.207.89.255
4610.207.90.0/2310.207.90.1 – 10.207.91.25410.207.91.255
4710.207.92.0/2310.207.92.1 – 10.207.93.25410.207.93.255
4810.207.94.0/2310.207.94.1 – 10.207.95.25410.207.95.255
4910.207.96.0/2310.207.96.1 – 10.207.97.25410.207.97.255
5010.207.98.0/2310.207.98.1 – 10.207.99.25410.207.99.255
5110.207.100.0/2310.207.100.1 – 10.207.101.25410.207.101.255
5210.207.102.0/2310.207.102.1 – 10.207.103.25410.207.103.255
5310.207.104.0/2310.207.104.1 – 10.207.105.25410.207.105.255
5410.207.106.0/2310.207.106.1 – 10.207.107.25410.207.107.255
5510.207.108.0/2310.207.108.1 – 10.207.109.25410.207.109.255
5610.207.110.0/2310.207.110.1 – 10.207.111.25410.207.111.255
5710.207.112.0/2310.207.112.1 – 10.207.113.25410.207.113.255
5810.207.114.0/2310.207.114.1 – 10.207.115.25410.207.115.255
5910.207.116.0/2310.207.116.1 – 10.207.117.25410.207.117.255
6010.207.118.0/2310.207.118.1 – 10.207.119.25410.207.119.255
6110.207.120.0/2310.207.120.1 – 10.207.121.25410.207.121.255
6210.207.122.0/2310.207.122.1 – 10.207.123.25410.207.123.255
6310.207.124.0/2310.207.124.1 – 10.207.125.25410.207.125.255
6410.207.126.0/2310.207.126.1 – 10.207.127.25410.207.127.255
6510.207.128.0/2310.207.128.1 – 10.207.129.25410.207.129.255
6610.207.130.0/2310.207.130.1 – 10.207.131.25410.207.131.255
6710.207.132.0/2310.207.132.1 – 10.207.133.25410.207.133.255
6810.207.134.0/2310.207.134.1 – 10.207.135.25410.207.135.255
6910.207.136.0/2310.207.136.1 – 10.207.137.25410.207.137.255
7010.207.138.0/2310.207.138.1 – 10.207.139.25410.207.139.255
7110.207.140.0/2310.207.140.1 – 10.207.141.25410.207.141.255
7210.207.142.0/2310.207.142.1 – 10.207.143.25410.207.143.255
7310.207.144.0/2310.207.144.1 – 10.207.145.25410.207.145.255
7410.207.146.0/2310.207.146.1 – 10.207.147.25410.207.147.255
7510.207.148.0/2310.207.148.1 – 10.207.149.25410.207.149.255
7610.207.150.0/2310.207.150.1 – 10.207.151.25410.207.151.255
7710.207.152.0/2310.207.152.1 – 10.207.153.25410.207.153.255
7810.207.154.0/2310.207.154.1 – 10.207.155.25410.207.155.255
7910.207.156.0/2310.207.156.1 – 10.207.157.25410.207.157.255
8010.207.158.0/2310.207.158.1 – 10.207.159.25410.207.159.255
8110.207.160.0/2310.207.160.1 – 10.207.161.25410.207.161.255
8210.207.162.0/2310.207.162.1 – 10.207.163.25410.207.163.255
8310.207.164.0/2310.207.164.1 – 10.207.165.25410.207.165.255
8410.207.166.0/2310.207.166.1 – 10.207.167.25410.207.167.255
8510.207.168.0/2310.207.168.1 – 10.207.169.25410.207.169.255
8610.207.170.0/2310.207.170.1 – 10.207.171.25410.207.171.255
8710.207.172.0/2310.207.172.1 – 10.207.173.25410.207.173.255
8810.207.174.0/2310.207.174.1 – 10.207.175.25410.207.175.255
8910.207.176.0/2310.207.176.1 – 10.207.177.25410.207.177.255
9010.207.178.0/2310.207.178.1 – 10.207.179.25410.207.179.255
9110.207.180.0/2310.207.180.1 – 10.207.181.25410.207.181.255
9210.207.182.0/2310.207.182.1 – 10.207.183.25410.207.183.255
9310.207.184.0/2310.207.184.1 – 10.207.185.25410.207.185.255
9410.207.186.0/2310.207.186.1 – 10.207.187.25410.207.187.255
9510.207.188.0/2310.207.188.1 – 10.207.189.25410.207.189.255
9610.207.190.0/2310.207.190.1 – 10.207.191.25410.207.191.255
9710.207.192.0/2310.207.192.1 – 10.207.193.25410.207.193.255
9810.207.194.0/2310.207.194.1 – 10.207.195.25410.207.195.255
9910.207.196.0/2310.207.196.1 – 10.207.197.25410.207.197.255
10010.207.198.0/2310.207.198.1 – 10.207.199.25410.207.199.255
10110.207.200.0/2310.207.200.1 – 10.207.201.25410.207.201.255
10210.207.202.0/2310.207.202.1 – 10.207.203.25410.207.203.255
10310.207.204.0/2310.207.204.1 – 10.207.205.25410.207.205.255
10410.207.206.0/2310.207.206.1 – 10.207.207.25410.207.207.255
10510.207.208.0/2310.207.208.1 – 10.207.209.25410.207.209.255
10610.207.210.0/2310.207.210.1 – 10.207.211.25410.207.211.255
10710.207.212.0/2310.207.212.1 – 10.207.213.25410.207.213.255
10810.207.214.0/2310.207.214.1 – 10.207.215.25410.207.215.255
10910.207.216.0/2310.207.216.1 – 10.207.217.25410.207.217.255
11010.207.218.0/2310.207.218.1 – 10.207.219.25410.207.219.255
11110.207.220.0/2310.207.220.1 – 10.207.221.25410.207.221.255
11210.207.222.0/2310.207.222.1 – 10.207.223.25410.207.223.255
11310.207.224.0/2310.207.224.1 – 10.207.225.25410.207.225.255
11410.207.226.0/2310.207.226.1 – 10.207.227.25410.207.227.255
11510.207.228.0/2310.207.228.1 – 10.207.229.25410.207.229.255
11610.207.230.0/2310.207.230.1 – 10.207.231.25410.207.231.255
11710.207.232.0/2310.207.232.1 – 10.207.233.25410.207.233.255
11810.207.234.0/2310.207.234.1 – 10.207.235.25410.207.235.255
11910.207.236.0/2310.207.236.1 – 10.207.237.25410.207.237.255
12010.207.238.0/2310.207.238.1 – 10.207.239.25410.207.239.255
12110.207.240.0/2310.207.240.1 – 10.207.241.25410.207.241.255
12210.207.242.0/2310.207.242.1 – 10.207.243.25410.207.243.255
12310.207.244.0/2310.207.244.1 – 10.207.245.25410.207.245.255
12410.207.246.0/2310.207.246.1 – 10.207.247.25410.207.247.255
12510.207.248.0/2310.207.248.1 – 10.207.249.25410.207.249.255
12610.207.250.0/2310.207.250.1 – 10.207.251.25410.207.251.255
12710.207.252.0/2310.207.252.1 – 10.207.253.25410.207.253.255
12810.207.254.0/2310.207.254.1 – 10.207.255.25410.207.255.255
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 →