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)10.30.192.0/18
network10.30.192.0/18
broadcast10.30.255.255
first host10.30.192.1
last host10.30.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.30.192.0/18
address00001010.00011110.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00011110.11000000.00000000
broadcast00001010.00011110.11111111.11111111
green = network part, grey = host part
hex0x0a1ec000
decimal169787392
reverse dns0.192.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.30.192.0/2510.30.192.1 – 10.30.192.12610.30.192.127
210.30.192.128/2510.30.192.129 – 10.30.192.25410.30.192.255
310.30.193.0/2510.30.193.1 – 10.30.193.12610.30.193.127
410.30.193.128/2510.30.193.129 – 10.30.193.25410.30.193.255
510.30.194.0/2510.30.194.1 – 10.30.194.12610.30.194.127
610.30.194.128/2510.30.194.129 – 10.30.194.25410.30.194.255
710.30.195.0/2510.30.195.1 – 10.30.195.12610.30.195.127
810.30.195.128/2510.30.195.129 – 10.30.195.25410.30.195.255
910.30.196.0/2510.30.196.1 – 10.30.196.12610.30.196.127
1010.30.196.128/2510.30.196.129 – 10.30.196.25410.30.196.255
1110.30.197.0/2510.30.197.1 – 10.30.197.12610.30.197.127
1210.30.197.128/2510.30.197.129 – 10.30.197.25410.30.197.255
1310.30.198.0/2510.30.198.1 – 10.30.198.12610.30.198.127
1410.30.198.128/2510.30.198.129 – 10.30.198.25410.30.198.255
1510.30.199.0/2510.30.199.1 – 10.30.199.12610.30.199.127
1610.30.199.128/2510.30.199.129 – 10.30.199.25410.30.199.255
1710.30.200.0/2510.30.200.1 – 10.30.200.12610.30.200.127
1810.30.200.128/2510.30.200.129 – 10.30.200.25410.30.200.255
1910.30.201.0/2510.30.201.1 – 10.30.201.12610.30.201.127
2010.30.201.128/2510.30.201.129 – 10.30.201.25410.30.201.255
2110.30.202.0/2510.30.202.1 – 10.30.202.12610.30.202.127
2210.30.202.128/2510.30.202.129 – 10.30.202.25410.30.202.255
2310.30.203.0/2510.30.203.1 – 10.30.203.12610.30.203.127
2410.30.203.128/2510.30.203.129 – 10.30.203.25410.30.203.255
2510.30.204.0/2510.30.204.1 – 10.30.204.12610.30.204.127
2610.30.204.128/2510.30.204.129 – 10.30.204.25410.30.204.255
2710.30.205.0/2510.30.205.1 – 10.30.205.12610.30.205.127
2810.30.205.128/2510.30.205.129 – 10.30.205.25410.30.205.255
2910.30.206.0/2510.30.206.1 – 10.30.206.12610.30.206.127
3010.30.206.128/2510.30.206.129 – 10.30.206.25410.30.206.255
3110.30.207.0/2510.30.207.1 – 10.30.207.12610.30.207.127
3210.30.207.128/2510.30.207.129 – 10.30.207.25410.30.207.255
3310.30.208.0/2510.30.208.1 – 10.30.208.12610.30.208.127
3410.30.208.128/2510.30.208.129 – 10.30.208.25410.30.208.255
3510.30.209.0/2510.30.209.1 – 10.30.209.12610.30.209.127
3610.30.209.128/2510.30.209.129 – 10.30.209.25410.30.209.255
3710.30.210.0/2510.30.210.1 – 10.30.210.12610.30.210.127
3810.30.210.128/2510.30.210.129 – 10.30.210.25410.30.210.255
3910.30.211.0/2510.30.211.1 – 10.30.211.12610.30.211.127
4010.30.211.128/2510.30.211.129 – 10.30.211.25410.30.211.255
4110.30.212.0/2510.30.212.1 – 10.30.212.12610.30.212.127
4210.30.212.128/2510.30.212.129 – 10.30.212.25410.30.212.255
4310.30.213.0/2510.30.213.1 – 10.30.213.12610.30.213.127
4410.30.213.128/2510.30.213.129 – 10.30.213.25410.30.213.255
4510.30.214.0/2510.30.214.1 – 10.30.214.12610.30.214.127
4610.30.214.128/2510.30.214.129 – 10.30.214.25410.30.214.255
4710.30.215.0/2510.30.215.1 – 10.30.215.12610.30.215.127
4810.30.215.128/2510.30.215.129 – 10.30.215.25410.30.215.255
4910.30.216.0/2510.30.216.1 – 10.30.216.12610.30.216.127
5010.30.216.128/2510.30.216.129 – 10.30.216.25410.30.216.255
5110.30.217.0/2510.30.217.1 – 10.30.217.12610.30.217.127
5210.30.217.128/2510.30.217.129 – 10.30.217.25410.30.217.255
5310.30.218.0/2510.30.218.1 – 10.30.218.12610.30.218.127
5410.30.218.128/2510.30.218.129 – 10.30.218.25410.30.218.255
5510.30.219.0/2510.30.219.1 – 10.30.219.12610.30.219.127
5610.30.219.128/2510.30.219.129 – 10.30.219.25410.30.219.255
5710.30.220.0/2510.30.220.1 – 10.30.220.12610.30.220.127
5810.30.220.128/2510.30.220.129 – 10.30.220.25410.30.220.255
5910.30.221.0/2510.30.221.1 – 10.30.221.12610.30.221.127
6010.30.221.128/2510.30.221.129 – 10.30.221.25410.30.221.255
6110.30.222.0/2510.30.222.1 – 10.30.222.12610.30.222.127
6210.30.222.128/2510.30.222.129 – 10.30.222.25410.30.222.255
6310.30.223.0/2510.30.223.1 – 10.30.223.12610.30.223.127
6410.30.223.128/2510.30.223.129 – 10.30.223.25410.30.223.255
6510.30.224.0/2510.30.224.1 – 10.30.224.12610.30.224.127
6610.30.224.128/2510.30.224.129 – 10.30.224.25410.30.224.255
6710.30.225.0/2510.30.225.1 – 10.30.225.12610.30.225.127
6810.30.225.128/2510.30.225.129 – 10.30.225.25410.30.225.255
6910.30.226.0/2510.30.226.1 – 10.30.226.12610.30.226.127
7010.30.226.128/2510.30.226.129 – 10.30.226.25410.30.226.255
7110.30.227.0/2510.30.227.1 – 10.30.227.12610.30.227.127
7210.30.227.128/2510.30.227.129 – 10.30.227.25410.30.227.255
7310.30.228.0/2510.30.228.1 – 10.30.228.12610.30.228.127
7410.30.228.128/2510.30.228.129 – 10.30.228.25410.30.228.255
7510.30.229.0/2510.30.229.1 – 10.30.229.12610.30.229.127
7610.30.229.128/2510.30.229.129 – 10.30.229.25410.30.229.255
7710.30.230.0/2510.30.230.1 – 10.30.230.12610.30.230.127
7810.30.230.128/2510.30.230.129 – 10.30.230.25410.30.230.255
7910.30.231.0/2510.30.231.1 – 10.30.231.12610.30.231.127
8010.30.231.128/2510.30.231.129 – 10.30.231.25410.30.231.255
8110.30.232.0/2510.30.232.1 – 10.30.232.12610.30.232.127
8210.30.232.128/2510.30.232.129 – 10.30.232.25410.30.232.255
8310.30.233.0/2510.30.233.1 – 10.30.233.12610.30.233.127
8410.30.233.128/2510.30.233.129 – 10.30.233.25410.30.233.255
8510.30.234.0/2510.30.234.1 – 10.30.234.12610.30.234.127
8610.30.234.128/2510.30.234.129 – 10.30.234.25410.30.234.255
8710.30.235.0/2510.30.235.1 – 10.30.235.12610.30.235.127
8810.30.235.128/2510.30.235.129 – 10.30.235.25410.30.235.255
8910.30.236.0/2510.30.236.1 – 10.30.236.12610.30.236.127
9010.30.236.128/2510.30.236.129 – 10.30.236.25410.30.236.255
9110.30.237.0/2510.30.237.1 – 10.30.237.12610.30.237.127
9210.30.237.128/2510.30.237.129 – 10.30.237.25410.30.237.255
9310.30.238.0/2510.30.238.1 – 10.30.238.12610.30.238.127
9410.30.238.128/2510.30.238.129 – 10.30.238.25410.30.238.255
9510.30.239.0/2510.30.239.1 – 10.30.239.12610.30.239.127
9610.30.239.128/2510.30.239.129 – 10.30.239.25410.30.239.255
9710.30.240.0/2510.30.240.1 – 10.30.240.12610.30.240.127
9810.30.240.128/2510.30.240.129 – 10.30.240.25410.30.240.255
9910.30.241.0/2510.30.241.1 – 10.30.241.12610.30.241.127
10010.30.241.128/2510.30.241.129 – 10.30.241.25410.30.241.255
10110.30.242.0/2510.30.242.1 – 10.30.242.12610.30.242.127
10210.30.242.128/2510.30.242.129 – 10.30.242.25410.30.242.255
10310.30.243.0/2510.30.243.1 – 10.30.243.12610.30.243.127
10410.30.243.128/2510.30.243.129 – 10.30.243.25410.30.243.255
10510.30.244.0/2510.30.244.1 – 10.30.244.12610.30.244.127
10610.30.244.128/2510.30.244.129 – 10.30.244.25410.30.244.255
10710.30.245.0/2510.30.245.1 – 10.30.245.12610.30.245.127
10810.30.245.128/2510.30.245.129 – 10.30.245.25410.30.245.255
10910.30.246.0/2510.30.246.1 – 10.30.246.12610.30.246.127
11010.30.246.128/2510.30.246.129 – 10.30.246.25410.30.246.255
11110.30.247.0/2510.30.247.1 – 10.30.247.12610.30.247.127
11210.30.247.128/2510.30.247.129 – 10.30.247.25410.30.247.255
11310.30.248.0/2510.30.248.1 – 10.30.248.12610.30.248.127
11410.30.248.128/2510.30.248.129 – 10.30.248.25410.30.248.255
11510.30.249.0/2510.30.249.1 – 10.30.249.12610.30.249.127
11610.30.249.128/2510.30.249.129 – 10.30.249.25410.30.249.255
11710.30.250.0/2510.30.250.1 – 10.30.250.12610.30.250.127
11810.30.250.128/2510.30.250.129 – 10.30.250.25410.30.250.255
11910.30.251.0/2510.30.251.1 – 10.30.251.12610.30.251.127
12010.30.251.128/2510.30.251.129 – 10.30.251.25410.30.251.255
12110.30.252.0/2510.30.252.1 – 10.30.252.12610.30.252.127
12210.30.252.128/2510.30.252.129 – 10.30.252.25410.30.252.255
12310.30.253.0/2510.30.253.1 – 10.30.253.12610.30.253.127
12410.30.253.128/2510.30.253.129 – 10.30.253.25410.30.253.255
12510.30.254.0/2510.30.254.1 – 10.30.254.12610.30.254.127
12610.30.254.128/2510.30.254.129 – 10.30.254.25410.30.254.255
12710.30.255.0/2510.30.255.1 – 10.30.255.12610.30.255.127
12810.30.255.128/2510.30.255.129 – 10.30.255.25410.30.255.255
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 →