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)10.25.0.0/16
network10.25.0.0/16
broadcast10.25.255.255
first host10.25.0.1
last host10.25.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.25.0.0/16
address00001010.00011001.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.00011001.00000000.00000000
broadcast00001010.00011001.11111111.11111111
green = network part, grey = host part
hex0x0a190000
decimal169410560
reverse dns0.0.25.10.in-addr.arpa
ipv4-mapped::ffff:a19:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.25.0.0/2310.25.0.1 – 10.25.1.25410.25.1.255
210.25.2.0/2310.25.2.1 – 10.25.3.25410.25.3.255
310.25.4.0/2310.25.4.1 – 10.25.5.25410.25.5.255
410.25.6.0/2310.25.6.1 – 10.25.7.25410.25.7.255
510.25.8.0/2310.25.8.1 – 10.25.9.25410.25.9.255
610.25.10.0/2310.25.10.1 – 10.25.11.25410.25.11.255
710.25.12.0/2310.25.12.1 – 10.25.13.25410.25.13.255
810.25.14.0/2310.25.14.1 – 10.25.15.25410.25.15.255
910.25.16.0/2310.25.16.1 – 10.25.17.25410.25.17.255
1010.25.18.0/2310.25.18.1 – 10.25.19.25410.25.19.255
1110.25.20.0/2310.25.20.1 – 10.25.21.25410.25.21.255
1210.25.22.0/2310.25.22.1 – 10.25.23.25410.25.23.255
1310.25.24.0/2310.25.24.1 – 10.25.25.25410.25.25.255
1410.25.26.0/2310.25.26.1 – 10.25.27.25410.25.27.255
1510.25.28.0/2310.25.28.1 – 10.25.29.25410.25.29.255
1610.25.30.0/2310.25.30.1 – 10.25.31.25410.25.31.255
1710.25.32.0/2310.25.32.1 – 10.25.33.25410.25.33.255
1810.25.34.0/2310.25.34.1 – 10.25.35.25410.25.35.255
1910.25.36.0/2310.25.36.1 – 10.25.37.25410.25.37.255
2010.25.38.0/2310.25.38.1 – 10.25.39.25410.25.39.255
2110.25.40.0/2310.25.40.1 – 10.25.41.25410.25.41.255
2210.25.42.0/2310.25.42.1 – 10.25.43.25410.25.43.255
2310.25.44.0/2310.25.44.1 – 10.25.45.25410.25.45.255
2410.25.46.0/2310.25.46.1 – 10.25.47.25410.25.47.255
2510.25.48.0/2310.25.48.1 – 10.25.49.25410.25.49.255
2610.25.50.0/2310.25.50.1 – 10.25.51.25410.25.51.255
2710.25.52.0/2310.25.52.1 – 10.25.53.25410.25.53.255
2810.25.54.0/2310.25.54.1 – 10.25.55.25410.25.55.255
2910.25.56.0/2310.25.56.1 – 10.25.57.25410.25.57.255
3010.25.58.0/2310.25.58.1 – 10.25.59.25410.25.59.255
3110.25.60.0/2310.25.60.1 – 10.25.61.25410.25.61.255
3210.25.62.0/2310.25.62.1 – 10.25.63.25410.25.63.255
3310.25.64.0/2310.25.64.1 – 10.25.65.25410.25.65.255
3410.25.66.0/2310.25.66.1 – 10.25.67.25410.25.67.255
3510.25.68.0/2310.25.68.1 – 10.25.69.25410.25.69.255
3610.25.70.0/2310.25.70.1 – 10.25.71.25410.25.71.255
3710.25.72.0/2310.25.72.1 – 10.25.73.25410.25.73.255
3810.25.74.0/2310.25.74.1 – 10.25.75.25410.25.75.255
3910.25.76.0/2310.25.76.1 – 10.25.77.25410.25.77.255
4010.25.78.0/2310.25.78.1 – 10.25.79.25410.25.79.255
4110.25.80.0/2310.25.80.1 – 10.25.81.25410.25.81.255
4210.25.82.0/2310.25.82.1 – 10.25.83.25410.25.83.255
4310.25.84.0/2310.25.84.1 – 10.25.85.25410.25.85.255
4410.25.86.0/2310.25.86.1 – 10.25.87.25410.25.87.255
4510.25.88.0/2310.25.88.1 – 10.25.89.25410.25.89.255
4610.25.90.0/2310.25.90.1 – 10.25.91.25410.25.91.255
4710.25.92.0/2310.25.92.1 – 10.25.93.25410.25.93.255
4810.25.94.0/2310.25.94.1 – 10.25.95.25410.25.95.255
4910.25.96.0/2310.25.96.1 – 10.25.97.25410.25.97.255
5010.25.98.0/2310.25.98.1 – 10.25.99.25410.25.99.255
5110.25.100.0/2310.25.100.1 – 10.25.101.25410.25.101.255
5210.25.102.0/2310.25.102.1 – 10.25.103.25410.25.103.255
5310.25.104.0/2310.25.104.1 – 10.25.105.25410.25.105.255
5410.25.106.0/2310.25.106.1 – 10.25.107.25410.25.107.255
5510.25.108.0/2310.25.108.1 – 10.25.109.25410.25.109.255
5610.25.110.0/2310.25.110.1 – 10.25.111.25410.25.111.255
5710.25.112.0/2310.25.112.1 – 10.25.113.25410.25.113.255
5810.25.114.0/2310.25.114.1 – 10.25.115.25410.25.115.255
5910.25.116.0/2310.25.116.1 – 10.25.117.25410.25.117.255
6010.25.118.0/2310.25.118.1 – 10.25.119.25410.25.119.255
6110.25.120.0/2310.25.120.1 – 10.25.121.25410.25.121.255
6210.25.122.0/2310.25.122.1 – 10.25.123.25410.25.123.255
6310.25.124.0/2310.25.124.1 – 10.25.125.25410.25.125.255
6410.25.126.0/2310.25.126.1 – 10.25.127.25410.25.127.255
6510.25.128.0/2310.25.128.1 – 10.25.129.25410.25.129.255
6610.25.130.0/2310.25.130.1 – 10.25.131.25410.25.131.255
6710.25.132.0/2310.25.132.1 – 10.25.133.25410.25.133.255
6810.25.134.0/2310.25.134.1 – 10.25.135.25410.25.135.255
6910.25.136.0/2310.25.136.1 – 10.25.137.25410.25.137.255
7010.25.138.0/2310.25.138.1 – 10.25.139.25410.25.139.255
7110.25.140.0/2310.25.140.1 – 10.25.141.25410.25.141.255
7210.25.142.0/2310.25.142.1 – 10.25.143.25410.25.143.255
7310.25.144.0/2310.25.144.1 – 10.25.145.25410.25.145.255
7410.25.146.0/2310.25.146.1 – 10.25.147.25410.25.147.255
7510.25.148.0/2310.25.148.1 – 10.25.149.25410.25.149.255
7610.25.150.0/2310.25.150.1 – 10.25.151.25410.25.151.255
7710.25.152.0/2310.25.152.1 – 10.25.153.25410.25.153.255
7810.25.154.0/2310.25.154.1 – 10.25.155.25410.25.155.255
7910.25.156.0/2310.25.156.1 – 10.25.157.25410.25.157.255
8010.25.158.0/2310.25.158.1 – 10.25.159.25410.25.159.255
8110.25.160.0/2310.25.160.1 – 10.25.161.25410.25.161.255
8210.25.162.0/2310.25.162.1 – 10.25.163.25410.25.163.255
8310.25.164.0/2310.25.164.1 – 10.25.165.25410.25.165.255
8410.25.166.0/2310.25.166.1 – 10.25.167.25410.25.167.255
8510.25.168.0/2310.25.168.1 – 10.25.169.25410.25.169.255
8610.25.170.0/2310.25.170.1 – 10.25.171.25410.25.171.255
8710.25.172.0/2310.25.172.1 – 10.25.173.25410.25.173.255
8810.25.174.0/2310.25.174.1 – 10.25.175.25410.25.175.255
8910.25.176.0/2310.25.176.1 – 10.25.177.25410.25.177.255
9010.25.178.0/2310.25.178.1 – 10.25.179.25410.25.179.255
9110.25.180.0/2310.25.180.1 – 10.25.181.25410.25.181.255
9210.25.182.0/2310.25.182.1 – 10.25.183.25410.25.183.255
9310.25.184.0/2310.25.184.1 – 10.25.185.25410.25.185.255
9410.25.186.0/2310.25.186.1 – 10.25.187.25410.25.187.255
9510.25.188.0/2310.25.188.1 – 10.25.189.25410.25.189.255
9610.25.190.0/2310.25.190.1 – 10.25.191.25410.25.191.255
9710.25.192.0/2310.25.192.1 – 10.25.193.25410.25.193.255
9810.25.194.0/2310.25.194.1 – 10.25.195.25410.25.195.255
9910.25.196.0/2310.25.196.1 – 10.25.197.25410.25.197.255
10010.25.198.0/2310.25.198.1 – 10.25.199.25410.25.199.255
10110.25.200.0/2310.25.200.1 – 10.25.201.25410.25.201.255
10210.25.202.0/2310.25.202.1 – 10.25.203.25410.25.203.255
10310.25.204.0/2310.25.204.1 – 10.25.205.25410.25.205.255
10410.25.206.0/2310.25.206.1 – 10.25.207.25410.25.207.255
10510.25.208.0/2310.25.208.1 – 10.25.209.25410.25.209.255
10610.25.210.0/2310.25.210.1 – 10.25.211.25410.25.211.255
10710.25.212.0/2310.25.212.1 – 10.25.213.25410.25.213.255
10810.25.214.0/2310.25.214.1 – 10.25.215.25410.25.215.255
10910.25.216.0/2310.25.216.1 – 10.25.217.25410.25.217.255
11010.25.218.0/2310.25.218.1 – 10.25.219.25410.25.219.255
11110.25.220.0/2310.25.220.1 – 10.25.221.25410.25.221.255
11210.25.222.0/2310.25.222.1 – 10.25.223.25410.25.223.255
11310.25.224.0/2310.25.224.1 – 10.25.225.25410.25.225.255
11410.25.226.0/2310.25.226.1 – 10.25.227.25410.25.227.255
11510.25.228.0/2310.25.228.1 – 10.25.229.25410.25.229.255
11610.25.230.0/2310.25.230.1 – 10.25.231.25410.25.231.255
11710.25.232.0/2310.25.232.1 – 10.25.233.25410.25.233.255
11810.25.234.0/2310.25.234.1 – 10.25.235.25410.25.235.255
11910.25.236.0/2310.25.236.1 – 10.25.237.25410.25.237.255
12010.25.238.0/2310.25.238.1 – 10.25.239.25410.25.239.255
12110.25.240.0/2310.25.240.1 – 10.25.241.25410.25.241.255
12210.25.242.0/2310.25.242.1 – 10.25.243.25410.25.243.255
12310.25.244.0/2310.25.244.1 – 10.25.245.25410.25.245.255
12410.25.246.0/2310.25.246.1 – 10.25.247.25410.25.247.255
12510.25.248.0/2310.25.248.1 – 10.25.249.25410.25.249.255
12610.25.250.0/2310.25.250.1 – 10.25.251.25410.25.251.255
12710.25.252.0/2310.25.252.1 – 10.25.253.25410.25.253.255
12810.25.254.0/2310.25.254.1 – 10.25.255.25410.25.255.255
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 →