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)10.36.192.0/18
network10.36.192.0/18
broadcast10.36.255.255
first host10.36.192.1
last host10.36.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.36.192.0/18
address00001010.00100100.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00100100.11000000.00000000
broadcast00001010.00100100.11111111.11111111
green = network part, grey = host part
hex0x0a24c000
decimal170180608
reverse dns0.192.36.10.in-addr.arpa
ipv4-mapped::ffff:a24:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.36.192.0/2510.36.192.1 – 10.36.192.12610.36.192.127
210.36.192.128/2510.36.192.129 – 10.36.192.25410.36.192.255
310.36.193.0/2510.36.193.1 – 10.36.193.12610.36.193.127
410.36.193.128/2510.36.193.129 – 10.36.193.25410.36.193.255
510.36.194.0/2510.36.194.1 – 10.36.194.12610.36.194.127
610.36.194.128/2510.36.194.129 – 10.36.194.25410.36.194.255
710.36.195.0/2510.36.195.1 – 10.36.195.12610.36.195.127
810.36.195.128/2510.36.195.129 – 10.36.195.25410.36.195.255
910.36.196.0/2510.36.196.1 – 10.36.196.12610.36.196.127
1010.36.196.128/2510.36.196.129 – 10.36.196.25410.36.196.255
1110.36.197.0/2510.36.197.1 – 10.36.197.12610.36.197.127
1210.36.197.128/2510.36.197.129 – 10.36.197.25410.36.197.255
1310.36.198.0/2510.36.198.1 – 10.36.198.12610.36.198.127
1410.36.198.128/2510.36.198.129 – 10.36.198.25410.36.198.255
1510.36.199.0/2510.36.199.1 – 10.36.199.12610.36.199.127
1610.36.199.128/2510.36.199.129 – 10.36.199.25410.36.199.255
1710.36.200.0/2510.36.200.1 – 10.36.200.12610.36.200.127
1810.36.200.128/2510.36.200.129 – 10.36.200.25410.36.200.255
1910.36.201.0/2510.36.201.1 – 10.36.201.12610.36.201.127
2010.36.201.128/2510.36.201.129 – 10.36.201.25410.36.201.255
2110.36.202.0/2510.36.202.1 – 10.36.202.12610.36.202.127
2210.36.202.128/2510.36.202.129 – 10.36.202.25410.36.202.255
2310.36.203.0/2510.36.203.1 – 10.36.203.12610.36.203.127
2410.36.203.128/2510.36.203.129 – 10.36.203.25410.36.203.255
2510.36.204.0/2510.36.204.1 – 10.36.204.12610.36.204.127
2610.36.204.128/2510.36.204.129 – 10.36.204.25410.36.204.255
2710.36.205.0/2510.36.205.1 – 10.36.205.12610.36.205.127
2810.36.205.128/2510.36.205.129 – 10.36.205.25410.36.205.255
2910.36.206.0/2510.36.206.1 – 10.36.206.12610.36.206.127
3010.36.206.128/2510.36.206.129 – 10.36.206.25410.36.206.255
3110.36.207.0/2510.36.207.1 – 10.36.207.12610.36.207.127
3210.36.207.128/2510.36.207.129 – 10.36.207.25410.36.207.255
3310.36.208.0/2510.36.208.1 – 10.36.208.12610.36.208.127
3410.36.208.128/2510.36.208.129 – 10.36.208.25410.36.208.255
3510.36.209.0/2510.36.209.1 – 10.36.209.12610.36.209.127
3610.36.209.128/2510.36.209.129 – 10.36.209.25410.36.209.255
3710.36.210.0/2510.36.210.1 – 10.36.210.12610.36.210.127
3810.36.210.128/2510.36.210.129 – 10.36.210.25410.36.210.255
3910.36.211.0/2510.36.211.1 – 10.36.211.12610.36.211.127
4010.36.211.128/2510.36.211.129 – 10.36.211.25410.36.211.255
4110.36.212.0/2510.36.212.1 – 10.36.212.12610.36.212.127
4210.36.212.128/2510.36.212.129 – 10.36.212.25410.36.212.255
4310.36.213.0/2510.36.213.1 – 10.36.213.12610.36.213.127
4410.36.213.128/2510.36.213.129 – 10.36.213.25410.36.213.255
4510.36.214.0/2510.36.214.1 – 10.36.214.12610.36.214.127
4610.36.214.128/2510.36.214.129 – 10.36.214.25410.36.214.255
4710.36.215.0/2510.36.215.1 – 10.36.215.12610.36.215.127
4810.36.215.128/2510.36.215.129 – 10.36.215.25410.36.215.255
4910.36.216.0/2510.36.216.1 – 10.36.216.12610.36.216.127
5010.36.216.128/2510.36.216.129 – 10.36.216.25410.36.216.255
5110.36.217.0/2510.36.217.1 – 10.36.217.12610.36.217.127
5210.36.217.128/2510.36.217.129 – 10.36.217.25410.36.217.255
5310.36.218.0/2510.36.218.1 – 10.36.218.12610.36.218.127
5410.36.218.128/2510.36.218.129 – 10.36.218.25410.36.218.255
5510.36.219.0/2510.36.219.1 – 10.36.219.12610.36.219.127
5610.36.219.128/2510.36.219.129 – 10.36.219.25410.36.219.255
5710.36.220.0/2510.36.220.1 – 10.36.220.12610.36.220.127
5810.36.220.128/2510.36.220.129 – 10.36.220.25410.36.220.255
5910.36.221.0/2510.36.221.1 – 10.36.221.12610.36.221.127
6010.36.221.128/2510.36.221.129 – 10.36.221.25410.36.221.255
6110.36.222.0/2510.36.222.1 – 10.36.222.12610.36.222.127
6210.36.222.128/2510.36.222.129 – 10.36.222.25410.36.222.255
6310.36.223.0/2510.36.223.1 – 10.36.223.12610.36.223.127
6410.36.223.128/2510.36.223.129 – 10.36.223.25410.36.223.255
6510.36.224.0/2510.36.224.1 – 10.36.224.12610.36.224.127
6610.36.224.128/2510.36.224.129 – 10.36.224.25410.36.224.255
6710.36.225.0/2510.36.225.1 – 10.36.225.12610.36.225.127
6810.36.225.128/2510.36.225.129 – 10.36.225.25410.36.225.255
6910.36.226.0/2510.36.226.1 – 10.36.226.12610.36.226.127
7010.36.226.128/2510.36.226.129 – 10.36.226.25410.36.226.255
7110.36.227.0/2510.36.227.1 – 10.36.227.12610.36.227.127
7210.36.227.128/2510.36.227.129 – 10.36.227.25410.36.227.255
7310.36.228.0/2510.36.228.1 – 10.36.228.12610.36.228.127
7410.36.228.128/2510.36.228.129 – 10.36.228.25410.36.228.255
7510.36.229.0/2510.36.229.1 – 10.36.229.12610.36.229.127
7610.36.229.128/2510.36.229.129 – 10.36.229.25410.36.229.255
7710.36.230.0/2510.36.230.1 – 10.36.230.12610.36.230.127
7810.36.230.128/2510.36.230.129 – 10.36.230.25410.36.230.255
7910.36.231.0/2510.36.231.1 – 10.36.231.12610.36.231.127
8010.36.231.128/2510.36.231.129 – 10.36.231.25410.36.231.255
8110.36.232.0/2510.36.232.1 – 10.36.232.12610.36.232.127
8210.36.232.128/2510.36.232.129 – 10.36.232.25410.36.232.255
8310.36.233.0/2510.36.233.1 – 10.36.233.12610.36.233.127
8410.36.233.128/2510.36.233.129 – 10.36.233.25410.36.233.255
8510.36.234.0/2510.36.234.1 – 10.36.234.12610.36.234.127
8610.36.234.128/2510.36.234.129 – 10.36.234.25410.36.234.255
8710.36.235.0/2510.36.235.1 – 10.36.235.12610.36.235.127
8810.36.235.128/2510.36.235.129 – 10.36.235.25410.36.235.255
8910.36.236.0/2510.36.236.1 – 10.36.236.12610.36.236.127
9010.36.236.128/2510.36.236.129 – 10.36.236.25410.36.236.255
9110.36.237.0/2510.36.237.1 – 10.36.237.12610.36.237.127
9210.36.237.128/2510.36.237.129 – 10.36.237.25410.36.237.255
9310.36.238.0/2510.36.238.1 – 10.36.238.12610.36.238.127
9410.36.238.128/2510.36.238.129 – 10.36.238.25410.36.238.255
9510.36.239.0/2510.36.239.1 – 10.36.239.12610.36.239.127
9610.36.239.128/2510.36.239.129 – 10.36.239.25410.36.239.255
9710.36.240.0/2510.36.240.1 – 10.36.240.12610.36.240.127
9810.36.240.128/2510.36.240.129 – 10.36.240.25410.36.240.255
9910.36.241.0/2510.36.241.1 – 10.36.241.12610.36.241.127
10010.36.241.128/2510.36.241.129 – 10.36.241.25410.36.241.255
10110.36.242.0/2510.36.242.1 – 10.36.242.12610.36.242.127
10210.36.242.128/2510.36.242.129 – 10.36.242.25410.36.242.255
10310.36.243.0/2510.36.243.1 – 10.36.243.12610.36.243.127
10410.36.243.128/2510.36.243.129 – 10.36.243.25410.36.243.255
10510.36.244.0/2510.36.244.1 – 10.36.244.12610.36.244.127
10610.36.244.128/2510.36.244.129 – 10.36.244.25410.36.244.255
10710.36.245.0/2510.36.245.1 – 10.36.245.12610.36.245.127
10810.36.245.128/2510.36.245.129 – 10.36.245.25410.36.245.255
10910.36.246.0/2510.36.246.1 – 10.36.246.12610.36.246.127
11010.36.246.128/2510.36.246.129 – 10.36.246.25410.36.246.255
11110.36.247.0/2510.36.247.1 – 10.36.247.12610.36.247.127
11210.36.247.128/2510.36.247.129 – 10.36.247.25410.36.247.255
11310.36.248.0/2510.36.248.1 – 10.36.248.12610.36.248.127
11410.36.248.128/2510.36.248.129 – 10.36.248.25410.36.248.255
11510.36.249.0/2510.36.249.1 – 10.36.249.12610.36.249.127
11610.36.249.128/2510.36.249.129 – 10.36.249.25410.36.249.255
11710.36.250.0/2510.36.250.1 – 10.36.250.12610.36.250.127
11810.36.250.128/2510.36.250.129 – 10.36.250.25410.36.250.255
11910.36.251.0/2510.36.251.1 – 10.36.251.12610.36.251.127
12010.36.251.128/2510.36.251.129 – 10.36.251.25410.36.251.255
12110.36.252.0/2510.36.252.1 – 10.36.252.12610.36.252.127
12210.36.252.128/2510.36.252.129 – 10.36.252.25410.36.252.255
12310.36.253.0/2510.36.253.1 – 10.36.253.12610.36.253.127
12410.36.253.128/2510.36.253.129 – 10.36.253.25410.36.253.255
12510.36.254.0/2510.36.254.1 – 10.36.254.12610.36.254.127
12610.36.254.128/2510.36.254.129 – 10.36.254.25410.36.254.255
12710.36.255.0/2510.36.255.1 – 10.36.255.12610.36.255.127
12810.36.255.128/2510.36.255.129 – 10.36.255.25410.36.255.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /18
/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-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →