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)10.7.192.0/18
network10.7.192.0/18
broadcast10.7.255.255
first host10.7.192.1
last host10.7.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.7.192.0/18
address00001010.00000111.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00000111.11000000.00000000
broadcast00001010.00000111.11111111.11111111
green = network part, grey = host part
hex0x0a07c000
decimal168280064
reverse dns0.192.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.192.0/2510.7.192.1 – 10.7.192.12610.7.192.127
210.7.192.128/2510.7.192.129 – 10.7.192.25410.7.192.255
310.7.193.0/2510.7.193.1 – 10.7.193.12610.7.193.127
410.7.193.128/2510.7.193.129 – 10.7.193.25410.7.193.255
510.7.194.0/2510.7.194.1 – 10.7.194.12610.7.194.127
610.7.194.128/2510.7.194.129 – 10.7.194.25410.7.194.255
710.7.195.0/2510.7.195.1 – 10.7.195.12610.7.195.127
810.7.195.128/2510.7.195.129 – 10.7.195.25410.7.195.255
910.7.196.0/2510.7.196.1 – 10.7.196.12610.7.196.127
1010.7.196.128/2510.7.196.129 – 10.7.196.25410.7.196.255
1110.7.197.0/2510.7.197.1 – 10.7.197.12610.7.197.127
1210.7.197.128/2510.7.197.129 – 10.7.197.25410.7.197.255
1310.7.198.0/2510.7.198.1 – 10.7.198.12610.7.198.127
1410.7.198.128/2510.7.198.129 – 10.7.198.25410.7.198.255
1510.7.199.0/2510.7.199.1 – 10.7.199.12610.7.199.127
1610.7.199.128/2510.7.199.129 – 10.7.199.25410.7.199.255
1710.7.200.0/2510.7.200.1 – 10.7.200.12610.7.200.127
1810.7.200.128/2510.7.200.129 – 10.7.200.25410.7.200.255
1910.7.201.0/2510.7.201.1 – 10.7.201.12610.7.201.127
2010.7.201.128/2510.7.201.129 – 10.7.201.25410.7.201.255
2110.7.202.0/2510.7.202.1 – 10.7.202.12610.7.202.127
2210.7.202.128/2510.7.202.129 – 10.7.202.25410.7.202.255
2310.7.203.0/2510.7.203.1 – 10.7.203.12610.7.203.127
2410.7.203.128/2510.7.203.129 – 10.7.203.25410.7.203.255
2510.7.204.0/2510.7.204.1 – 10.7.204.12610.7.204.127
2610.7.204.128/2510.7.204.129 – 10.7.204.25410.7.204.255
2710.7.205.0/2510.7.205.1 – 10.7.205.12610.7.205.127
2810.7.205.128/2510.7.205.129 – 10.7.205.25410.7.205.255
2910.7.206.0/2510.7.206.1 – 10.7.206.12610.7.206.127
3010.7.206.128/2510.7.206.129 – 10.7.206.25410.7.206.255
3110.7.207.0/2510.7.207.1 – 10.7.207.12610.7.207.127
3210.7.207.128/2510.7.207.129 – 10.7.207.25410.7.207.255
3310.7.208.0/2510.7.208.1 – 10.7.208.12610.7.208.127
3410.7.208.128/2510.7.208.129 – 10.7.208.25410.7.208.255
3510.7.209.0/2510.7.209.1 – 10.7.209.12610.7.209.127
3610.7.209.128/2510.7.209.129 – 10.7.209.25410.7.209.255
3710.7.210.0/2510.7.210.1 – 10.7.210.12610.7.210.127
3810.7.210.128/2510.7.210.129 – 10.7.210.25410.7.210.255
3910.7.211.0/2510.7.211.1 – 10.7.211.12610.7.211.127
4010.7.211.128/2510.7.211.129 – 10.7.211.25410.7.211.255
4110.7.212.0/2510.7.212.1 – 10.7.212.12610.7.212.127
4210.7.212.128/2510.7.212.129 – 10.7.212.25410.7.212.255
4310.7.213.0/2510.7.213.1 – 10.7.213.12610.7.213.127
4410.7.213.128/2510.7.213.129 – 10.7.213.25410.7.213.255
4510.7.214.0/2510.7.214.1 – 10.7.214.12610.7.214.127
4610.7.214.128/2510.7.214.129 – 10.7.214.25410.7.214.255
4710.7.215.0/2510.7.215.1 – 10.7.215.12610.7.215.127
4810.7.215.128/2510.7.215.129 – 10.7.215.25410.7.215.255
4910.7.216.0/2510.7.216.1 – 10.7.216.12610.7.216.127
5010.7.216.128/2510.7.216.129 – 10.7.216.25410.7.216.255
5110.7.217.0/2510.7.217.1 – 10.7.217.12610.7.217.127
5210.7.217.128/2510.7.217.129 – 10.7.217.25410.7.217.255
5310.7.218.0/2510.7.218.1 – 10.7.218.12610.7.218.127
5410.7.218.128/2510.7.218.129 – 10.7.218.25410.7.218.255
5510.7.219.0/2510.7.219.1 – 10.7.219.12610.7.219.127
5610.7.219.128/2510.7.219.129 – 10.7.219.25410.7.219.255
5710.7.220.0/2510.7.220.1 – 10.7.220.12610.7.220.127
5810.7.220.128/2510.7.220.129 – 10.7.220.25410.7.220.255
5910.7.221.0/2510.7.221.1 – 10.7.221.12610.7.221.127
6010.7.221.128/2510.7.221.129 – 10.7.221.25410.7.221.255
6110.7.222.0/2510.7.222.1 – 10.7.222.12610.7.222.127
6210.7.222.128/2510.7.222.129 – 10.7.222.25410.7.222.255
6310.7.223.0/2510.7.223.1 – 10.7.223.12610.7.223.127
6410.7.223.128/2510.7.223.129 – 10.7.223.25410.7.223.255
6510.7.224.0/2510.7.224.1 – 10.7.224.12610.7.224.127
6610.7.224.128/2510.7.224.129 – 10.7.224.25410.7.224.255
6710.7.225.0/2510.7.225.1 – 10.7.225.12610.7.225.127
6810.7.225.128/2510.7.225.129 – 10.7.225.25410.7.225.255
6910.7.226.0/2510.7.226.1 – 10.7.226.12610.7.226.127
7010.7.226.128/2510.7.226.129 – 10.7.226.25410.7.226.255
7110.7.227.0/2510.7.227.1 – 10.7.227.12610.7.227.127
7210.7.227.128/2510.7.227.129 – 10.7.227.25410.7.227.255
7310.7.228.0/2510.7.228.1 – 10.7.228.12610.7.228.127
7410.7.228.128/2510.7.228.129 – 10.7.228.25410.7.228.255
7510.7.229.0/2510.7.229.1 – 10.7.229.12610.7.229.127
7610.7.229.128/2510.7.229.129 – 10.7.229.25410.7.229.255
7710.7.230.0/2510.7.230.1 – 10.7.230.12610.7.230.127
7810.7.230.128/2510.7.230.129 – 10.7.230.25410.7.230.255
7910.7.231.0/2510.7.231.1 – 10.7.231.12610.7.231.127
8010.7.231.128/2510.7.231.129 – 10.7.231.25410.7.231.255
8110.7.232.0/2510.7.232.1 – 10.7.232.12610.7.232.127
8210.7.232.128/2510.7.232.129 – 10.7.232.25410.7.232.255
8310.7.233.0/2510.7.233.1 – 10.7.233.12610.7.233.127
8410.7.233.128/2510.7.233.129 – 10.7.233.25410.7.233.255
8510.7.234.0/2510.7.234.1 – 10.7.234.12610.7.234.127
8610.7.234.128/2510.7.234.129 – 10.7.234.25410.7.234.255
8710.7.235.0/2510.7.235.1 – 10.7.235.12610.7.235.127
8810.7.235.128/2510.7.235.129 – 10.7.235.25410.7.235.255
8910.7.236.0/2510.7.236.1 – 10.7.236.12610.7.236.127
9010.7.236.128/2510.7.236.129 – 10.7.236.25410.7.236.255
9110.7.237.0/2510.7.237.1 – 10.7.237.12610.7.237.127
9210.7.237.128/2510.7.237.129 – 10.7.237.25410.7.237.255
9310.7.238.0/2510.7.238.1 – 10.7.238.12610.7.238.127
9410.7.238.128/2510.7.238.129 – 10.7.238.25410.7.238.255
9510.7.239.0/2510.7.239.1 – 10.7.239.12610.7.239.127
9610.7.239.128/2510.7.239.129 – 10.7.239.25410.7.239.255
9710.7.240.0/2510.7.240.1 – 10.7.240.12610.7.240.127
9810.7.240.128/2510.7.240.129 – 10.7.240.25410.7.240.255
9910.7.241.0/2510.7.241.1 – 10.7.241.12610.7.241.127
10010.7.241.128/2510.7.241.129 – 10.7.241.25410.7.241.255
10110.7.242.0/2510.7.242.1 – 10.7.242.12610.7.242.127
10210.7.242.128/2510.7.242.129 – 10.7.242.25410.7.242.255
10310.7.243.0/2510.7.243.1 – 10.7.243.12610.7.243.127
10410.7.243.128/2510.7.243.129 – 10.7.243.25410.7.243.255
10510.7.244.0/2510.7.244.1 – 10.7.244.12610.7.244.127
10610.7.244.128/2510.7.244.129 – 10.7.244.25410.7.244.255
10710.7.245.0/2510.7.245.1 – 10.7.245.12610.7.245.127
10810.7.245.128/2510.7.245.129 – 10.7.245.25410.7.245.255
10910.7.246.0/2510.7.246.1 – 10.7.246.12610.7.246.127
11010.7.246.128/2510.7.246.129 – 10.7.246.25410.7.246.255
11110.7.247.0/2510.7.247.1 – 10.7.247.12610.7.247.127
11210.7.247.128/2510.7.247.129 – 10.7.247.25410.7.247.255
11310.7.248.0/2510.7.248.1 – 10.7.248.12610.7.248.127
11410.7.248.128/2510.7.248.129 – 10.7.248.25410.7.248.255
11510.7.249.0/2510.7.249.1 – 10.7.249.12610.7.249.127
11610.7.249.128/2510.7.249.129 – 10.7.249.25410.7.249.255
11710.7.250.0/2510.7.250.1 – 10.7.250.12610.7.250.127
11810.7.250.128/2510.7.250.129 – 10.7.250.25410.7.250.255
11910.7.251.0/2510.7.251.1 – 10.7.251.12610.7.251.127
12010.7.251.128/2510.7.251.129 – 10.7.251.25410.7.251.255
12110.7.252.0/2510.7.252.1 – 10.7.252.12610.7.252.127
12210.7.252.128/2510.7.252.129 – 10.7.252.25410.7.252.255
12310.7.253.0/2510.7.253.1 – 10.7.253.12610.7.253.127
12410.7.253.128/2510.7.253.129 – 10.7.253.25410.7.253.255
12510.7.254.0/2510.7.254.1 – 10.7.254.12610.7.254.127
12610.7.254.128/2510.7.254.129 – 10.7.254.25410.7.254.255
12710.7.255.0/2510.7.255.1 – 10.7.255.12610.7.255.127
12810.7.255.128/2510.7.255.129 – 10.7.255.25410.7.255.255
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 →