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)10.125.0.0/16
network10.125.0.0/16
broadcast10.125.255.255
first host10.125.0.1
last host10.125.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.125.0.0/16
address00001010.01111101.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.01111101.00000000.00000000
broadcast00001010.01111101.11111111.11111111
green = network part, grey = host part
hex0x0a7d0000
decimal175964160
reverse dns0.0.125.10.in-addr.arpa
ipv4-mapped::ffff:a7d:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.125.0.0/2310.125.0.1 – 10.125.1.25410.125.1.255
210.125.2.0/2310.125.2.1 – 10.125.3.25410.125.3.255
310.125.4.0/2310.125.4.1 – 10.125.5.25410.125.5.255
410.125.6.0/2310.125.6.1 – 10.125.7.25410.125.7.255
510.125.8.0/2310.125.8.1 – 10.125.9.25410.125.9.255
610.125.10.0/2310.125.10.1 – 10.125.11.25410.125.11.255
710.125.12.0/2310.125.12.1 – 10.125.13.25410.125.13.255
810.125.14.0/2310.125.14.1 – 10.125.15.25410.125.15.255
910.125.16.0/2310.125.16.1 – 10.125.17.25410.125.17.255
1010.125.18.0/2310.125.18.1 – 10.125.19.25410.125.19.255
1110.125.20.0/2310.125.20.1 – 10.125.21.25410.125.21.255
1210.125.22.0/2310.125.22.1 – 10.125.23.25410.125.23.255
1310.125.24.0/2310.125.24.1 – 10.125.25.25410.125.25.255
1410.125.26.0/2310.125.26.1 – 10.125.27.25410.125.27.255
1510.125.28.0/2310.125.28.1 – 10.125.29.25410.125.29.255
1610.125.30.0/2310.125.30.1 – 10.125.31.25410.125.31.255
1710.125.32.0/2310.125.32.1 – 10.125.33.25410.125.33.255
1810.125.34.0/2310.125.34.1 – 10.125.35.25410.125.35.255
1910.125.36.0/2310.125.36.1 – 10.125.37.25410.125.37.255
2010.125.38.0/2310.125.38.1 – 10.125.39.25410.125.39.255
2110.125.40.0/2310.125.40.1 – 10.125.41.25410.125.41.255
2210.125.42.0/2310.125.42.1 – 10.125.43.25410.125.43.255
2310.125.44.0/2310.125.44.1 – 10.125.45.25410.125.45.255
2410.125.46.0/2310.125.46.1 – 10.125.47.25410.125.47.255
2510.125.48.0/2310.125.48.1 – 10.125.49.25410.125.49.255
2610.125.50.0/2310.125.50.1 – 10.125.51.25410.125.51.255
2710.125.52.0/2310.125.52.1 – 10.125.53.25410.125.53.255
2810.125.54.0/2310.125.54.1 – 10.125.55.25410.125.55.255
2910.125.56.0/2310.125.56.1 – 10.125.57.25410.125.57.255
3010.125.58.0/2310.125.58.1 – 10.125.59.25410.125.59.255
3110.125.60.0/2310.125.60.1 – 10.125.61.25410.125.61.255
3210.125.62.0/2310.125.62.1 – 10.125.63.25410.125.63.255
3310.125.64.0/2310.125.64.1 – 10.125.65.25410.125.65.255
3410.125.66.0/2310.125.66.1 – 10.125.67.25410.125.67.255
3510.125.68.0/2310.125.68.1 – 10.125.69.25410.125.69.255
3610.125.70.0/2310.125.70.1 – 10.125.71.25410.125.71.255
3710.125.72.0/2310.125.72.1 – 10.125.73.25410.125.73.255
3810.125.74.0/2310.125.74.1 – 10.125.75.25410.125.75.255
3910.125.76.0/2310.125.76.1 – 10.125.77.25410.125.77.255
4010.125.78.0/2310.125.78.1 – 10.125.79.25410.125.79.255
4110.125.80.0/2310.125.80.1 – 10.125.81.25410.125.81.255
4210.125.82.0/2310.125.82.1 – 10.125.83.25410.125.83.255
4310.125.84.0/2310.125.84.1 – 10.125.85.25410.125.85.255
4410.125.86.0/2310.125.86.1 – 10.125.87.25410.125.87.255
4510.125.88.0/2310.125.88.1 – 10.125.89.25410.125.89.255
4610.125.90.0/2310.125.90.1 – 10.125.91.25410.125.91.255
4710.125.92.0/2310.125.92.1 – 10.125.93.25410.125.93.255
4810.125.94.0/2310.125.94.1 – 10.125.95.25410.125.95.255
4910.125.96.0/2310.125.96.1 – 10.125.97.25410.125.97.255
5010.125.98.0/2310.125.98.1 – 10.125.99.25410.125.99.255
5110.125.100.0/2310.125.100.1 – 10.125.101.25410.125.101.255
5210.125.102.0/2310.125.102.1 – 10.125.103.25410.125.103.255
5310.125.104.0/2310.125.104.1 – 10.125.105.25410.125.105.255
5410.125.106.0/2310.125.106.1 – 10.125.107.25410.125.107.255
5510.125.108.0/2310.125.108.1 – 10.125.109.25410.125.109.255
5610.125.110.0/2310.125.110.1 – 10.125.111.25410.125.111.255
5710.125.112.0/2310.125.112.1 – 10.125.113.25410.125.113.255
5810.125.114.0/2310.125.114.1 – 10.125.115.25410.125.115.255
5910.125.116.0/2310.125.116.1 – 10.125.117.25410.125.117.255
6010.125.118.0/2310.125.118.1 – 10.125.119.25410.125.119.255
6110.125.120.0/2310.125.120.1 – 10.125.121.25410.125.121.255
6210.125.122.0/2310.125.122.1 – 10.125.123.25410.125.123.255
6310.125.124.0/2310.125.124.1 – 10.125.125.25410.125.125.255
6410.125.126.0/2310.125.126.1 – 10.125.127.25410.125.127.255
6510.125.128.0/2310.125.128.1 – 10.125.129.25410.125.129.255
6610.125.130.0/2310.125.130.1 – 10.125.131.25410.125.131.255
6710.125.132.0/2310.125.132.1 – 10.125.133.25410.125.133.255
6810.125.134.0/2310.125.134.1 – 10.125.135.25410.125.135.255
6910.125.136.0/2310.125.136.1 – 10.125.137.25410.125.137.255
7010.125.138.0/2310.125.138.1 – 10.125.139.25410.125.139.255
7110.125.140.0/2310.125.140.1 – 10.125.141.25410.125.141.255
7210.125.142.0/2310.125.142.1 – 10.125.143.25410.125.143.255
7310.125.144.0/2310.125.144.1 – 10.125.145.25410.125.145.255
7410.125.146.0/2310.125.146.1 – 10.125.147.25410.125.147.255
7510.125.148.0/2310.125.148.1 – 10.125.149.25410.125.149.255
7610.125.150.0/2310.125.150.1 – 10.125.151.25410.125.151.255
7710.125.152.0/2310.125.152.1 – 10.125.153.25410.125.153.255
7810.125.154.0/2310.125.154.1 – 10.125.155.25410.125.155.255
7910.125.156.0/2310.125.156.1 – 10.125.157.25410.125.157.255
8010.125.158.0/2310.125.158.1 – 10.125.159.25410.125.159.255
8110.125.160.0/2310.125.160.1 – 10.125.161.25410.125.161.255
8210.125.162.0/2310.125.162.1 – 10.125.163.25410.125.163.255
8310.125.164.0/2310.125.164.1 – 10.125.165.25410.125.165.255
8410.125.166.0/2310.125.166.1 – 10.125.167.25410.125.167.255
8510.125.168.0/2310.125.168.1 – 10.125.169.25410.125.169.255
8610.125.170.0/2310.125.170.1 – 10.125.171.25410.125.171.255
8710.125.172.0/2310.125.172.1 – 10.125.173.25410.125.173.255
8810.125.174.0/2310.125.174.1 – 10.125.175.25410.125.175.255
8910.125.176.0/2310.125.176.1 – 10.125.177.25410.125.177.255
9010.125.178.0/2310.125.178.1 – 10.125.179.25410.125.179.255
9110.125.180.0/2310.125.180.1 – 10.125.181.25410.125.181.255
9210.125.182.0/2310.125.182.1 – 10.125.183.25410.125.183.255
9310.125.184.0/2310.125.184.1 – 10.125.185.25410.125.185.255
9410.125.186.0/2310.125.186.1 – 10.125.187.25410.125.187.255
9510.125.188.0/2310.125.188.1 – 10.125.189.25410.125.189.255
9610.125.190.0/2310.125.190.1 – 10.125.191.25410.125.191.255
9710.125.192.0/2310.125.192.1 – 10.125.193.25410.125.193.255
9810.125.194.0/2310.125.194.1 – 10.125.195.25410.125.195.255
9910.125.196.0/2310.125.196.1 – 10.125.197.25410.125.197.255
10010.125.198.0/2310.125.198.1 – 10.125.199.25410.125.199.255
10110.125.200.0/2310.125.200.1 – 10.125.201.25410.125.201.255
10210.125.202.0/2310.125.202.1 – 10.125.203.25410.125.203.255
10310.125.204.0/2310.125.204.1 – 10.125.205.25410.125.205.255
10410.125.206.0/2310.125.206.1 – 10.125.207.25410.125.207.255
10510.125.208.0/2310.125.208.1 – 10.125.209.25410.125.209.255
10610.125.210.0/2310.125.210.1 – 10.125.211.25410.125.211.255
10710.125.212.0/2310.125.212.1 – 10.125.213.25410.125.213.255
10810.125.214.0/2310.125.214.1 – 10.125.215.25410.125.215.255
10910.125.216.0/2310.125.216.1 – 10.125.217.25410.125.217.255
11010.125.218.0/2310.125.218.1 – 10.125.219.25410.125.219.255
11110.125.220.0/2310.125.220.1 – 10.125.221.25410.125.221.255
11210.125.222.0/2310.125.222.1 – 10.125.223.25410.125.223.255
11310.125.224.0/2310.125.224.1 – 10.125.225.25410.125.225.255
11410.125.226.0/2310.125.226.1 – 10.125.227.25410.125.227.255
11510.125.228.0/2310.125.228.1 – 10.125.229.25410.125.229.255
11610.125.230.0/2310.125.230.1 – 10.125.231.25410.125.231.255
11710.125.232.0/2310.125.232.1 – 10.125.233.25410.125.233.255
11810.125.234.0/2310.125.234.1 – 10.125.235.25410.125.235.255
11910.125.236.0/2310.125.236.1 – 10.125.237.25410.125.237.255
12010.125.238.0/2310.125.238.1 – 10.125.239.25410.125.239.255
12110.125.240.0/2310.125.240.1 – 10.125.241.25410.125.241.255
12210.125.242.0/2310.125.242.1 – 10.125.243.25410.125.243.255
12310.125.244.0/2310.125.244.1 – 10.125.245.25410.125.245.255
12410.125.246.0/2310.125.246.1 – 10.125.247.25410.125.247.255
12510.125.248.0/2310.125.248.1 – 10.125.249.25410.125.249.255
12610.125.250.0/2310.125.250.1 – 10.125.251.25410.125.251.255
12710.125.252.0/2310.125.252.1 – 10.125.253.25410.125.253.255
12810.125.254.0/2310.125.254.1 – 10.125.255.25410.125.255.255
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 →