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)10.129.0.0/16
network10.129.0.0/16
broadcast10.129.255.255
first host10.129.0.1
last host10.129.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.129.0.0/16
address00001010.10000001.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.10000001.00000000.00000000
broadcast00001010.10000001.11111111.11111111
green = network part, grey = host part
hex0x0a810000
decimal176226304
reverse dns0.0.129.10.in-addr.arpa
ipv4-mapped::ffff:a81:0

/16 split into /23 · 128 subnets

close ×
#networkhost rangebroadcast
110.129.0.0/2310.129.0.1 – 10.129.1.25410.129.1.255
210.129.2.0/2310.129.2.1 – 10.129.3.25410.129.3.255
310.129.4.0/2310.129.4.1 – 10.129.5.25410.129.5.255
410.129.6.0/2310.129.6.1 – 10.129.7.25410.129.7.255
510.129.8.0/2310.129.8.1 – 10.129.9.25410.129.9.255
610.129.10.0/2310.129.10.1 – 10.129.11.25410.129.11.255
710.129.12.0/2310.129.12.1 – 10.129.13.25410.129.13.255
810.129.14.0/2310.129.14.1 – 10.129.15.25410.129.15.255
910.129.16.0/2310.129.16.1 – 10.129.17.25410.129.17.255
1010.129.18.0/2310.129.18.1 – 10.129.19.25410.129.19.255
1110.129.20.0/2310.129.20.1 – 10.129.21.25410.129.21.255
1210.129.22.0/2310.129.22.1 – 10.129.23.25410.129.23.255
1310.129.24.0/2310.129.24.1 – 10.129.25.25410.129.25.255
1410.129.26.0/2310.129.26.1 – 10.129.27.25410.129.27.255
1510.129.28.0/2310.129.28.1 – 10.129.29.25410.129.29.255
1610.129.30.0/2310.129.30.1 – 10.129.31.25410.129.31.255
1710.129.32.0/2310.129.32.1 – 10.129.33.25410.129.33.255
1810.129.34.0/2310.129.34.1 – 10.129.35.25410.129.35.255
1910.129.36.0/2310.129.36.1 – 10.129.37.25410.129.37.255
2010.129.38.0/2310.129.38.1 – 10.129.39.25410.129.39.255
2110.129.40.0/2310.129.40.1 – 10.129.41.25410.129.41.255
2210.129.42.0/2310.129.42.1 – 10.129.43.25410.129.43.255
2310.129.44.0/2310.129.44.1 – 10.129.45.25410.129.45.255
2410.129.46.0/2310.129.46.1 – 10.129.47.25410.129.47.255
2510.129.48.0/2310.129.48.1 – 10.129.49.25410.129.49.255
2610.129.50.0/2310.129.50.1 – 10.129.51.25410.129.51.255
2710.129.52.0/2310.129.52.1 – 10.129.53.25410.129.53.255
2810.129.54.0/2310.129.54.1 – 10.129.55.25410.129.55.255
2910.129.56.0/2310.129.56.1 – 10.129.57.25410.129.57.255
3010.129.58.0/2310.129.58.1 – 10.129.59.25410.129.59.255
3110.129.60.0/2310.129.60.1 – 10.129.61.25410.129.61.255
3210.129.62.0/2310.129.62.1 – 10.129.63.25410.129.63.255
3310.129.64.0/2310.129.64.1 – 10.129.65.25410.129.65.255
3410.129.66.0/2310.129.66.1 – 10.129.67.25410.129.67.255
3510.129.68.0/2310.129.68.1 – 10.129.69.25410.129.69.255
3610.129.70.0/2310.129.70.1 – 10.129.71.25410.129.71.255
3710.129.72.0/2310.129.72.1 – 10.129.73.25410.129.73.255
3810.129.74.0/2310.129.74.1 – 10.129.75.25410.129.75.255
3910.129.76.0/2310.129.76.1 – 10.129.77.25410.129.77.255
4010.129.78.0/2310.129.78.1 – 10.129.79.25410.129.79.255
4110.129.80.0/2310.129.80.1 – 10.129.81.25410.129.81.255
4210.129.82.0/2310.129.82.1 – 10.129.83.25410.129.83.255
4310.129.84.0/2310.129.84.1 – 10.129.85.25410.129.85.255
4410.129.86.0/2310.129.86.1 – 10.129.87.25410.129.87.255
4510.129.88.0/2310.129.88.1 – 10.129.89.25410.129.89.255
4610.129.90.0/2310.129.90.1 – 10.129.91.25410.129.91.255
4710.129.92.0/2310.129.92.1 – 10.129.93.25410.129.93.255
4810.129.94.0/2310.129.94.1 – 10.129.95.25410.129.95.255
4910.129.96.0/2310.129.96.1 – 10.129.97.25410.129.97.255
5010.129.98.0/2310.129.98.1 – 10.129.99.25410.129.99.255
5110.129.100.0/2310.129.100.1 – 10.129.101.25410.129.101.255
5210.129.102.0/2310.129.102.1 – 10.129.103.25410.129.103.255
5310.129.104.0/2310.129.104.1 – 10.129.105.25410.129.105.255
5410.129.106.0/2310.129.106.1 – 10.129.107.25410.129.107.255
5510.129.108.0/2310.129.108.1 – 10.129.109.25410.129.109.255
5610.129.110.0/2310.129.110.1 – 10.129.111.25410.129.111.255
5710.129.112.0/2310.129.112.1 – 10.129.113.25410.129.113.255
5810.129.114.0/2310.129.114.1 – 10.129.115.25410.129.115.255
5910.129.116.0/2310.129.116.1 – 10.129.117.25410.129.117.255
6010.129.118.0/2310.129.118.1 – 10.129.119.25410.129.119.255
6110.129.120.0/2310.129.120.1 – 10.129.121.25410.129.121.255
6210.129.122.0/2310.129.122.1 – 10.129.123.25410.129.123.255
6310.129.124.0/2310.129.124.1 – 10.129.125.25410.129.125.255
6410.129.126.0/2310.129.126.1 – 10.129.127.25410.129.127.255
6510.129.128.0/2310.129.128.1 – 10.129.129.25410.129.129.255
6610.129.130.0/2310.129.130.1 – 10.129.131.25410.129.131.255
6710.129.132.0/2310.129.132.1 – 10.129.133.25410.129.133.255
6810.129.134.0/2310.129.134.1 – 10.129.135.25410.129.135.255
6910.129.136.0/2310.129.136.1 – 10.129.137.25410.129.137.255
7010.129.138.0/2310.129.138.1 – 10.129.139.25410.129.139.255
7110.129.140.0/2310.129.140.1 – 10.129.141.25410.129.141.255
7210.129.142.0/2310.129.142.1 – 10.129.143.25410.129.143.255
7310.129.144.0/2310.129.144.1 – 10.129.145.25410.129.145.255
7410.129.146.0/2310.129.146.1 – 10.129.147.25410.129.147.255
7510.129.148.0/2310.129.148.1 – 10.129.149.25410.129.149.255
7610.129.150.0/2310.129.150.1 – 10.129.151.25410.129.151.255
7710.129.152.0/2310.129.152.1 – 10.129.153.25410.129.153.255
7810.129.154.0/2310.129.154.1 – 10.129.155.25410.129.155.255
7910.129.156.0/2310.129.156.1 – 10.129.157.25410.129.157.255
8010.129.158.0/2310.129.158.1 – 10.129.159.25410.129.159.255
8110.129.160.0/2310.129.160.1 – 10.129.161.25410.129.161.255
8210.129.162.0/2310.129.162.1 – 10.129.163.25410.129.163.255
8310.129.164.0/2310.129.164.1 – 10.129.165.25410.129.165.255
8410.129.166.0/2310.129.166.1 – 10.129.167.25410.129.167.255
8510.129.168.0/2310.129.168.1 – 10.129.169.25410.129.169.255
8610.129.170.0/2310.129.170.1 – 10.129.171.25410.129.171.255
8710.129.172.0/2310.129.172.1 – 10.129.173.25410.129.173.255
8810.129.174.0/2310.129.174.1 – 10.129.175.25410.129.175.255
8910.129.176.0/2310.129.176.1 – 10.129.177.25410.129.177.255
9010.129.178.0/2310.129.178.1 – 10.129.179.25410.129.179.255
9110.129.180.0/2310.129.180.1 – 10.129.181.25410.129.181.255
9210.129.182.0/2310.129.182.1 – 10.129.183.25410.129.183.255
9310.129.184.0/2310.129.184.1 – 10.129.185.25410.129.185.255
9410.129.186.0/2310.129.186.1 – 10.129.187.25410.129.187.255
9510.129.188.0/2310.129.188.1 – 10.129.189.25410.129.189.255
9610.129.190.0/2310.129.190.1 – 10.129.191.25410.129.191.255
9710.129.192.0/2310.129.192.1 – 10.129.193.25410.129.193.255
9810.129.194.0/2310.129.194.1 – 10.129.195.25410.129.195.255
9910.129.196.0/2310.129.196.1 – 10.129.197.25410.129.197.255
10010.129.198.0/2310.129.198.1 – 10.129.199.25410.129.199.255
10110.129.200.0/2310.129.200.1 – 10.129.201.25410.129.201.255
10210.129.202.0/2310.129.202.1 – 10.129.203.25410.129.203.255
10310.129.204.0/2310.129.204.1 – 10.129.205.25410.129.205.255
10410.129.206.0/2310.129.206.1 – 10.129.207.25410.129.207.255
10510.129.208.0/2310.129.208.1 – 10.129.209.25410.129.209.255
10610.129.210.0/2310.129.210.1 – 10.129.211.25410.129.211.255
10710.129.212.0/2310.129.212.1 – 10.129.213.25410.129.213.255
10810.129.214.0/2310.129.214.1 – 10.129.215.25410.129.215.255
10910.129.216.0/2310.129.216.1 – 10.129.217.25410.129.217.255
11010.129.218.0/2310.129.218.1 – 10.129.219.25410.129.219.255
11110.129.220.0/2310.129.220.1 – 10.129.221.25410.129.221.255
11210.129.222.0/2310.129.222.1 – 10.129.223.25410.129.223.255
11310.129.224.0/2310.129.224.1 – 10.129.225.25410.129.225.255
11410.129.226.0/2310.129.226.1 – 10.129.227.25410.129.227.255
11510.129.228.0/2310.129.228.1 – 10.129.229.25410.129.229.255
11610.129.230.0/2310.129.230.1 – 10.129.231.25410.129.231.255
11710.129.232.0/2310.129.232.1 – 10.129.233.25410.129.233.255
11810.129.234.0/2310.129.234.1 – 10.129.235.25410.129.235.255
11910.129.236.0/2310.129.236.1 – 10.129.237.25410.129.237.255
12010.129.238.0/2310.129.238.1 – 10.129.239.25410.129.239.255
12110.129.240.0/2310.129.240.1 – 10.129.241.25410.129.241.255
12210.129.242.0/2310.129.242.1 – 10.129.243.25410.129.243.255
12310.129.244.0/2310.129.244.1 – 10.129.245.25410.129.245.255
12410.129.246.0/2310.129.246.1 – 10.129.247.25410.129.247.255
12510.129.248.0/2310.129.248.1 – 10.129.249.25410.129.249.255
12610.129.250.0/2310.129.250.1 – 10.129.251.25410.129.251.255
12710.129.252.0/2310.129.252.1 – 10.129.253.25410.129.253.255
12810.129.254.0/2310.129.254.1 – 10.129.255.25410.129.255.255
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 →