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)10.232.192.0/18
network10.232.192.0/18
broadcast10.232.255.255
first host10.232.192.1
last host10.232.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.232.192.0/18
address00001010.11101000.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.11101000.11000000.00000000
broadcast00001010.11101000.11111111.11111111
green = network part, grey = host part
hex0x0ae8c000
decimal183025664
reverse dns0.192.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.232.192.0/2510.232.192.1 – 10.232.192.12610.232.192.127
210.232.192.128/2510.232.192.129 – 10.232.192.25410.232.192.255
310.232.193.0/2510.232.193.1 – 10.232.193.12610.232.193.127
410.232.193.128/2510.232.193.129 – 10.232.193.25410.232.193.255
510.232.194.0/2510.232.194.1 – 10.232.194.12610.232.194.127
610.232.194.128/2510.232.194.129 – 10.232.194.25410.232.194.255
710.232.195.0/2510.232.195.1 – 10.232.195.12610.232.195.127
810.232.195.128/2510.232.195.129 – 10.232.195.25410.232.195.255
910.232.196.0/2510.232.196.1 – 10.232.196.12610.232.196.127
1010.232.196.128/2510.232.196.129 – 10.232.196.25410.232.196.255
1110.232.197.0/2510.232.197.1 – 10.232.197.12610.232.197.127
1210.232.197.128/2510.232.197.129 – 10.232.197.25410.232.197.255
1310.232.198.0/2510.232.198.1 – 10.232.198.12610.232.198.127
1410.232.198.128/2510.232.198.129 – 10.232.198.25410.232.198.255
1510.232.199.0/2510.232.199.1 – 10.232.199.12610.232.199.127
1610.232.199.128/2510.232.199.129 – 10.232.199.25410.232.199.255
1710.232.200.0/2510.232.200.1 – 10.232.200.12610.232.200.127
1810.232.200.128/2510.232.200.129 – 10.232.200.25410.232.200.255
1910.232.201.0/2510.232.201.1 – 10.232.201.12610.232.201.127
2010.232.201.128/2510.232.201.129 – 10.232.201.25410.232.201.255
2110.232.202.0/2510.232.202.1 – 10.232.202.12610.232.202.127
2210.232.202.128/2510.232.202.129 – 10.232.202.25410.232.202.255
2310.232.203.0/2510.232.203.1 – 10.232.203.12610.232.203.127
2410.232.203.128/2510.232.203.129 – 10.232.203.25410.232.203.255
2510.232.204.0/2510.232.204.1 – 10.232.204.12610.232.204.127
2610.232.204.128/2510.232.204.129 – 10.232.204.25410.232.204.255
2710.232.205.0/2510.232.205.1 – 10.232.205.12610.232.205.127
2810.232.205.128/2510.232.205.129 – 10.232.205.25410.232.205.255
2910.232.206.0/2510.232.206.1 – 10.232.206.12610.232.206.127
3010.232.206.128/2510.232.206.129 – 10.232.206.25410.232.206.255
3110.232.207.0/2510.232.207.1 – 10.232.207.12610.232.207.127
3210.232.207.128/2510.232.207.129 – 10.232.207.25410.232.207.255
3310.232.208.0/2510.232.208.1 – 10.232.208.12610.232.208.127
3410.232.208.128/2510.232.208.129 – 10.232.208.25410.232.208.255
3510.232.209.0/2510.232.209.1 – 10.232.209.12610.232.209.127
3610.232.209.128/2510.232.209.129 – 10.232.209.25410.232.209.255
3710.232.210.0/2510.232.210.1 – 10.232.210.12610.232.210.127
3810.232.210.128/2510.232.210.129 – 10.232.210.25410.232.210.255
3910.232.211.0/2510.232.211.1 – 10.232.211.12610.232.211.127
4010.232.211.128/2510.232.211.129 – 10.232.211.25410.232.211.255
4110.232.212.0/2510.232.212.1 – 10.232.212.12610.232.212.127
4210.232.212.128/2510.232.212.129 – 10.232.212.25410.232.212.255
4310.232.213.0/2510.232.213.1 – 10.232.213.12610.232.213.127
4410.232.213.128/2510.232.213.129 – 10.232.213.25410.232.213.255
4510.232.214.0/2510.232.214.1 – 10.232.214.12610.232.214.127
4610.232.214.128/2510.232.214.129 – 10.232.214.25410.232.214.255
4710.232.215.0/2510.232.215.1 – 10.232.215.12610.232.215.127
4810.232.215.128/2510.232.215.129 – 10.232.215.25410.232.215.255
4910.232.216.0/2510.232.216.1 – 10.232.216.12610.232.216.127
5010.232.216.128/2510.232.216.129 – 10.232.216.25410.232.216.255
5110.232.217.0/2510.232.217.1 – 10.232.217.12610.232.217.127
5210.232.217.128/2510.232.217.129 – 10.232.217.25410.232.217.255
5310.232.218.0/2510.232.218.1 – 10.232.218.12610.232.218.127
5410.232.218.128/2510.232.218.129 – 10.232.218.25410.232.218.255
5510.232.219.0/2510.232.219.1 – 10.232.219.12610.232.219.127
5610.232.219.128/2510.232.219.129 – 10.232.219.25410.232.219.255
5710.232.220.0/2510.232.220.1 – 10.232.220.12610.232.220.127
5810.232.220.128/2510.232.220.129 – 10.232.220.25410.232.220.255
5910.232.221.0/2510.232.221.1 – 10.232.221.12610.232.221.127
6010.232.221.128/2510.232.221.129 – 10.232.221.25410.232.221.255
6110.232.222.0/2510.232.222.1 – 10.232.222.12610.232.222.127
6210.232.222.128/2510.232.222.129 – 10.232.222.25410.232.222.255
6310.232.223.0/2510.232.223.1 – 10.232.223.12610.232.223.127
6410.232.223.128/2510.232.223.129 – 10.232.223.25410.232.223.255
6510.232.224.0/2510.232.224.1 – 10.232.224.12610.232.224.127
6610.232.224.128/2510.232.224.129 – 10.232.224.25410.232.224.255
6710.232.225.0/2510.232.225.1 – 10.232.225.12610.232.225.127
6810.232.225.128/2510.232.225.129 – 10.232.225.25410.232.225.255
6910.232.226.0/2510.232.226.1 – 10.232.226.12610.232.226.127
7010.232.226.128/2510.232.226.129 – 10.232.226.25410.232.226.255
7110.232.227.0/2510.232.227.1 – 10.232.227.12610.232.227.127
7210.232.227.128/2510.232.227.129 – 10.232.227.25410.232.227.255
7310.232.228.0/2510.232.228.1 – 10.232.228.12610.232.228.127
7410.232.228.128/2510.232.228.129 – 10.232.228.25410.232.228.255
7510.232.229.0/2510.232.229.1 – 10.232.229.12610.232.229.127
7610.232.229.128/2510.232.229.129 – 10.232.229.25410.232.229.255
7710.232.230.0/2510.232.230.1 – 10.232.230.12610.232.230.127
7810.232.230.128/2510.232.230.129 – 10.232.230.25410.232.230.255
7910.232.231.0/2510.232.231.1 – 10.232.231.12610.232.231.127
8010.232.231.128/2510.232.231.129 – 10.232.231.25410.232.231.255
8110.232.232.0/2510.232.232.1 – 10.232.232.12610.232.232.127
8210.232.232.128/2510.232.232.129 – 10.232.232.25410.232.232.255
8310.232.233.0/2510.232.233.1 – 10.232.233.12610.232.233.127
8410.232.233.128/2510.232.233.129 – 10.232.233.25410.232.233.255
8510.232.234.0/2510.232.234.1 – 10.232.234.12610.232.234.127
8610.232.234.128/2510.232.234.129 – 10.232.234.25410.232.234.255
8710.232.235.0/2510.232.235.1 – 10.232.235.12610.232.235.127
8810.232.235.128/2510.232.235.129 – 10.232.235.25410.232.235.255
8910.232.236.0/2510.232.236.1 – 10.232.236.12610.232.236.127
9010.232.236.128/2510.232.236.129 – 10.232.236.25410.232.236.255
9110.232.237.0/2510.232.237.1 – 10.232.237.12610.232.237.127
9210.232.237.128/2510.232.237.129 – 10.232.237.25410.232.237.255
9310.232.238.0/2510.232.238.1 – 10.232.238.12610.232.238.127
9410.232.238.128/2510.232.238.129 – 10.232.238.25410.232.238.255
9510.232.239.0/2510.232.239.1 – 10.232.239.12610.232.239.127
9610.232.239.128/2510.232.239.129 – 10.232.239.25410.232.239.255
9710.232.240.0/2510.232.240.1 – 10.232.240.12610.232.240.127
9810.232.240.128/2510.232.240.129 – 10.232.240.25410.232.240.255
9910.232.241.0/2510.232.241.1 – 10.232.241.12610.232.241.127
10010.232.241.128/2510.232.241.129 – 10.232.241.25410.232.241.255
10110.232.242.0/2510.232.242.1 – 10.232.242.12610.232.242.127
10210.232.242.128/2510.232.242.129 – 10.232.242.25410.232.242.255
10310.232.243.0/2510.232.243.1 – 10.232.243.12610.232.243.127
10410.232.243.128/2510.232.243.129 – 10.232.243.25410.232.243.255
10510.232.244.0/2510.232.244.1 – 10.232.244.12610.232.244.127
10610.232.244.128/2510.232.244.129 – 10.232.244.25410.232.244.255
10710.232.245.0/2510.232.245.1 – 10.232.245.12610.232.245.127
10810.232.245.128/2510.232.245.129 – 10.232.245.25410.232.245.255
10910.232.246.0/2510.232.246.1 – 10.232.246.12610.232.246.127
11010.232.246.128/2510.232.246.129 – 10.232.246.25410.232.246.255
11110.232.247.0/2510.232.247.1 – 10.232.247.12610.232.247.127
11210.232.247.128/2510.232.247.129 – 10.232.247.25410.232.247.255
11310.232.248.0/2510.232.248.1 – 10.232.248.12610.232.248.127
11410.232.248.128/2510.232.248.129 – 10.232.248.25410.232.248.255
11510.232.249.0/2510.232.249.1 – 10.232.249.12610.232.249.127
11610.232.249.128/2510.232.249.129 – 10.232.249.25410.232.249.255
11710.232.250.0/2510.232.250.1 – 10.232.250.12610.232.250.127
11810.232.250.128/2510.232.250.129 – 10.232.250.25410.232.250.255
11910.232.251.0/2510.232.251.1 – 10.232.251.12610.232.251.127
12010.232.251.128/2510.232.251.129 – 10.232.251.25410.232.251.255
12110.232.252.0/2510.232.252.1 – 10.232.252.12610.232.252.127
12210.232.252.128/2510.232.252.129 – 10.232.252.25410.232.252.255
12310.232.253.0/2510.232.253.1 – 10.232.253.12610.232.253.127
12410.232.253.128/2510.232.253.129 – 10.232.253.25410.232.253.255
12510.232.254.0/2510.232.254.1 – 10.232.254.12610.232.254.127
12610.232.254.128/2510.232.254.129 – 10.232.254.25410.232.254.255
12710.232.255.0/2510.232.255.1 – 10.232.255.12610.232.255.127
12810.232.255.128/2510.232.255.129 – 10.232.255.25410.232.255.255
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 →