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)10.55.192.0/18
network10.55.192.0/18
broadcast10.55.255.255
first host10.55.192.1
last host10.55.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.55.192.0/18
address00001010.00110111.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00110111.11000000.00000000
broadcast00001010.00110111.11111111.11111111
green = network part, grey = host part
hex0x0a37c000
decimal171425792
reverse dns0.192.55.10.in-addr.arpa
ipv4-mapped::ffff:a37:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.55.192.0/2510.55.192.1 – 10.55.192.12610.55.192.127
210.55.192.128/2510.55.192.129 – 10.55.192.25410.55.192.255
310.55.193.0/2510.55.193.1 – 10.55.193.12610.55.193.127
410.55.193.128/2510.55.193.129 – 10.55.193.25410.55.193.255
510.55.194.0/2510.55.194.1 – 10.55.194.12610.55.194.127
610.55.194.128/2510.55.194.129 – 10.55.194.25410.55.194.255
710.55.195.0/2510.55.195.1 – 10.55.195.12610.55.195.127
810.55.195.128/2510.55.195.129 – 10.55.195.25410.55.195.255
910.55.196.0/2510.55.196.1 – 10.55.196.12610.55.196.127
1010.55.196.128/2510.55.196.129 – 10.55.196.25410.55.196.255
1110.55.197.0/2510.55.197.1 – 10.55.197.12610.55.197.127
1210.55.197.128/2510.55.197.129 – 10.55.197.25410.55.197.255
1310.55.198.0/2510.55.198.1 – 10.55.198.12610.55.198.127
1410.55.198.128/2510.55.198.129 – 10.55.198.25410.55.198.255
1510.55.199.0/2510.55.199.1 – 10.55.199.12610.55.199.127
1610.55.199.128/2510.55.199.129 – 10.55.199.25410.55.199.255
1710.55.200.0/2510.55.200.1 – 10.55.200.12610.55.200.127
1810.55.200.128/2510.55.200.129 – 10.55.200.25410.55.200.255
1910.55.201.0/2510.55.201.1 – 10.55.201.12610.55.201.127
2010.55.201.128/2510.55.201.129 – 10.55.201.25410.55.201.255
2110.55.202.0/2510.55.202.1 – 10.55.202.12610.55.202.127
2210.55.202.128/2510.55.202.129 – 10.55.202.25410.55.202.255
2310.55.203.0/2510.55.203.1 – 10.55.203.12610.55.203.127
2410.55.203.128/2510.55.203.129 – 10.55.203.25410.55.203.255
2510.55.204.0/2510.55.204.1 – 10.55.204.12610.55.204.127
2610.55.204.128/2510.55.204.129 – 10.55.204.25410.55.204.255
2710.55.205.0/2510.55.205.1 – 10.55.205.12610.55.205.127
2810.55.205.128/2510.55.205.129 – 10.55.205.25410.55.205.255
2910.55.206.0/2510.55.206.1 – 10.55.206.12610.55.206.127
3010.55.206.128/2510.55.206.129 – 10.55.206.25410.55.206.255
3110.55.207.0/2510.55.207.1 – 10.55.207.12610.55.207.127
3210.55.207.128/2510.55.207.129 – 10.55.207.25410.55.207.255
3310.55.208.0/2510.55.208.1 – 10.55.208.12610.55.208.127
3410.55.208.128/2510.55.208.129 – 10.55.208.25410.55.208.255
3510.55.209.0/2510.55.209.1 – 10.55.209.12610.55.209.127
3610.55.209.128/2510.55.209.129 – 10.55.209.25410.55.209.255
3710.55.210.0/2510.55.210.1 – 10.55.210.12610.55.210.127
3810.55.210.128/2510.55.210.129 – 10.55.210.25410.55.210.255
3910.55.211.0/2510.55.211.1 – 10.55.211.12610.55.211.127
4010.55.211.128/2510.55.211.129 – 10.55.211.25410.55.211.255
4110.55.212.0/2510.55.212.1 – 10.55.212.12610.55.212.127
4210.55.212.128/2510.55.212.129 – 10.55.212.25410.55.212.255
4310.55.213.0/2510.55.213.1 – 10.55.213.12610.55.213.127
4410.55.213.128/2510.55.213.129 – 10.55.213.25410.55.213.255
4510.55.214.0/2510.55.214.1 – 10.55.214.12610.55.214.127
4610.55.214.128/2510.55.214.129 – 10.55.214.25410.55.214.255
4710.55.215.0/2510.55.215.1 – 10.55.215.12610.55.215.127
4810.55.215.128/2510.55.215.129 – 10.55.215.25410.55.215.255
4910.55.216.0/2510.55.216.1 – 10.55.216.12610.55.216.127
5010.55.216.128/2510.55.216.129 – 10.55.216.25410.55.216.255
5110.55.217.0/2510.55.217.1 – 10.55.217.12610.55.217.127
5210.55.217.128/2510.55.217.129 – 10.55.217.25410.55.217.255
5310.55.218.0/2510.55.218.1 – 10.55.218.12610.55.218.127
5410.55.218.128/2510.55.218.129 – 10.55.218.25410.55.218.255
5510.55.219.0/2510.55.219.1 – 10.55.219.12610.55.219.127
5610.55.219.128/2510.55.219.129 – 10.55.219.25410.55.219.255
5710.55.220.0/2510.55.220.1 – 10.55.220.12610.55.220.127
5810.55.220.128/2510.55.220.129 – 10.55.220.25410.55.220.255
5910.55.221.0/2510.55.221.1 – 10.55.221.12610.55.221.127
6010.55.221.128/2510.55.221.129 – 10.55.221.25410.55.221.255
6110.55.222.0/2510.55.222.1 – 10.55.222.12610.55.222.127
6210.55.222.128/2510.55.222.129 – 10.55.222.25410.55.222.255
6310.55.223.0/2510.55.223.1 – 10.55.223.12610.55.223.127
6410.55.223.128/2510.55.223.129 – 10.55.223.25410.55.223.255
6510.55.224.0/2510.55.224.1 – 10.55.224.12610.55.224.127
6610.55.224.128/2510.55.224.129 – 10.55.224.25410.55.224.255
6710.55.225.0/2510.55.225.1 – 10.55.225.12610.55.225.127
6810.55.225.128/2510.55.225.129 – 10.55.225.25410.55.225.255
6910.55.226.0/2510.55.226.1 – 10.55.226.12610.55.226.127
7010.55.226.128/2510.55.226.129 – 10.55.226.25410.55.226.255
7110.55.227.0/2510.55.227.1 – 10.55.227.12610.55.227.127
7210.55.227.128/2510.55.227.129 – 10.55.227.25410.55.227.255
7310.55.228.0/2510.55.228.1 – 10.55.228.12610.55.228.127
7410.55.228.128/2510.55.228.129 – 10.55.228.25410.55.228.255
7510.55.229.0/2510.55.229.1 – 10.55.229.12610.55.229.127
7610.55.229.128/2510.55.229.129 – 10.55.229.25410.55.229.255
7710.55.230.0/2510.55.230.1 – 10.55.230.12610.55.230.127
7810.55.230.128/2510.55.230.129 – 10.55.230.25410.55.230.255
7910.55.231.0/2510.55.231.1 – 10.55.231.12610.55.231.127
8010.55.231.128/2510.55.231.129 – 10.55.231.25410.55.231.255
8110.55.232.0/2510.55.232.1 – 10.55.232.12610.55.232.127
8210.55.232.128/2510.55.232.129 – 10.55.232.25410.55.232.255
8310.55.233.0/2510.55.233.1 – 10.55.233.12610.55.233.127
8410.55.233.128/2510.55.233.129 – 10.55.233.25410.55.233.255
8510.55.234.0/2510.55.234.1 – 10.55.234.12610.55.234.127
8610.55.234.128/2510.55.234.129 – 10.55.234.25410.55.234.255
8710.55.235.0/2510.55.235.1 – 10.55.235.12610.55.235.127
8810.55.235.128/2510.55.235.129 – 10.55.235.25410.55.235.255
8910.55.236.0/2510.55.236.1 – 10.55.236.12610.55.236.127
9010.55.236.128/2510.55.236.129 – 10.55.236.25410.55.236.255
9110.55.237.0/2510.55.237.1 – 10.55.237.12610.55.237.127
9210.55.237.128/2510.55.237.129 – 10.55.237.25410.55.237.255
9310.55.238.0/2510.55.238.1 – 10.55.238.12610.55.238.127
9410.55.238.128/2510.55.238.129 – 10.55.238.25410.55.238.255
9510.55.239.0/2510.55.239.1 – 10.55.239.12610.55.239.127
9610.55.239.128/2510.55.239.129 – 10.55.239.25410.55.239.255
9710.55.240.0/2510.55.240.1 – 10.55.240.12610.55.240.127
9810.55.240.128/2510.55.240.129 – 10.55.240.25410.55.240.255
9910.55.241.0/2510.55.241.1 – 10.55.241.12610.55.241.127
10010.55.241.128/2510.55.241.129 – 10.55.241.25410.55.241.255
10110.55.242.0/2510.55.242.1 – 10.55.242.12610.55.242.127
10210.55.242.128/2510.55.242.129 – 10.55.242.25410.55.242.255
10310.55.243.0/2510.55.243.1 – 10.55.243.12610.55.243.127
10410.55.243.128/2510.55.243.129 – 10.55.243.25410.55.243.255
10510.55.244.0/2510.55.244.1 – 10.55.244.12610.55.244.127
10610.55.244.128/2510.55.244.129 – 10.55.244.25410.55.244.255
10710.55.245.0/2510.55.245.1 – 10.55.245.12610.55.245.127
10810.55.245.128/2510.55.245.129 – 10.55.245.25410.55.245.255
10910.55.246.0/2510.55.246.1 – 10.55.246.12610.55.246.127
11010.55.246.128/2510.55.246.129 – 10.55.246.25410.55.246.255
11110.55.247.0/2510.55.247.1 – 10.55.247.12610.55.247.127
11210.55.247.128/2510.55.247.129 – 10.55.247.25410.55.247.255
11310.55.248.0/2510.55.248.1 – 10.55.248.12610.55.248.127
11410.55.248.128/2510.55.248.129 – 10.55.248.25410.55.248.255
11510.55.249.0/2510.55.249.1 – 10.55.249.12610.55.249.127
11610.55.249.128/2510.55.249.129 – 10.55.249.25410.55.249.255
11710.55.250.0/2510.55.250.1 – 10.55.250.12610.55.250.127
11810.55.250.128/2510.55.250.129 – 10.55.250.25410.55.250.255
11910.55.251.0/2510.55.251.1 – 10.55.251.12610.55.251.127
12010.55.251.128/2510.55.251.129 – 10.55.251.25410.55.251.255
12110.55.252.0/2510.55.252.1 – 10.55.252.12610.55.252.127
12210.55.252.128/2510.55.252.129 – 10.55.252.25410.55.252.255
12310.55.253.0/2510.55.253.1 – 10.55.253.12610.55.253.127
12410.55.253.128/2510.55.253.129 – 10.55.253.25410.55.253.255
12510.55.254.0/2510.55.254.1 – 10.55.254.12610.55.254.127
12610.55.254.128/2510.55.254.129 – 10.55.254.25410.55.254.255
12710.55.255.0/2510.55.255.1 – 10.55.255.12610.55.255.127
12810.55.255.128/2510.55.255.129 – 10.55.255.25410.55.255.255
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 →