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)10.43.192.0/18
network10.43.192.0/18
broadcast10.43.255.255
first host10.43.192.1
last host10.43.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.43.192.0/18
address00001010.00101011.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101011.11000000.00000000
broadcast00001010.00101011.11111111.11111111
green = network part, grey = host part
hex0x0a2bc000
decimal170639360
reverse dns0.192.43.10.in-addr.arpa
ipv4-mapped::ffff:a2b:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.43.192.0/2510.43.192.1 – 10.43.192.12610.43.192.127
210.43.192.128/2510.43.192.129 – 10.43.192.25410.43.192.255
310.43.193.0/2510.43.193.1 – 10.43.193.12610.43.193.127
410.43.193.128/2510.43.193.129 – 10.43.193.25410.43.193.255
510.43.194.0/2510.43.194.1 – 10.43.194.12610.43.194.127
610.43.194.128/2510.43.194.129 – 10.43.194.25410.43.194.255
710.43.195.0/2510.43.195.1 – 10.43.195.12610.43.195.127
810.43.195.128/2510.43.195.129 – 10.43.195.25410.43.195.255
910.43.196.0/2510.43.196.1 – 10.43.196.12610.43.196.127
1010.43.196.128/2510.43.196.129 – 10.43.196.25410.43.196.255
1110.43.197.0/2510.43.197.1 – 10.43.197.12610.43.197.127
1210.43.197.128/2510.43.197.129 – 10.43.197.25410.43.197.255
1310.43.198.0/2510.43.198.1 – 10.43.198.12610.43.198.127
1410.43.198.128/2510.43.198.129 – 10.43.198.25410.43.198.255
1510.43.199.0/2510.43.199.1 – 10.43.199.12610.43.199.127
1610.43.199.128/2510.43.199.129 – 10.43.199.25410.43.199.255
1710.43.200.0/2510.43.200.1 – 10.43.200.12610.43.200.127
1810.43.200.128/2510.43.200.129 – 10.43.200.25410.43.200.255
1910.43.201.0/2510.43.201.1 – 10.43.201.12610.43.201.127
2010.43.201.128/2510.43.201.129 – 10.43.201.25410.43.201.255
2110.43.202.0/2510.43.202.1 – 10.43.202.12610.43.202.127
2210.43.202.128/2510.43.202.129 – 10.43.202.25410.43.202.255
2310.43.203.0/2510.43.203.1 – 10.43.203.12610.43.203.127
2410.43.203.128/2510.43.203.129 – 10.43.203.25410.43.203.255
2510.43.204.0/2510.43.204.1 – 10.43.204.12610.43.204.127
2610.43.204.128/2510.43.204.129 – 10.43.204.25410.43.204.255
2710.43.205.0/2510.43.205.1 – 10.43.205.12610.43.205.127
2810.43.205.128/2510.43.205.129 – 10.43.205.25410.43.205.255
2910.43.206.0/2510.43.206.1 – 10.43.206.12610.43.206.127
3010.43.206.128/2510.43.206.129 – 10.43.206.25410.43.206.255
3110.43.207.0/2510.43.207.1 – 10.43.207.12610.43.207.127
3210.43.207.128/2510.43.207.129 – 10.43.207.25410.43.207.255
3310.43.208.0/2510.43.208.1 – 10.43.208.12610.43.208.127
3410.43.208.128/2510.43.208.129 – 10.43.208.25410.43.208.255
3510.43.209.0/2510.43.209.1 – 10.43.209.12610.43.209.127
3610.43.209.128/2510.43.209.129 – 10.43.209.25410.43.209.255
3710.43.210.0/2510.43.210.1 – 10.43.210.12610.43.210.127
3810.43.210.128/2510.43.210.129 – 10.43.210.25410.43.210.255
3910.43.211.0/2510.43.211.1 – 10.43.211.12610.43.211.127
4010.43.211.128/2510.43.211.129 – 10.43.211.25410.43.211.255
4110.43.212.0/2510.43.212.1 – 10.43.212.12610.43.212.127
4210.43.212.128/2510.43.212.129 – 10.43.212.25410.43.212.255
4310.43.213.0/2510.43.213.1 – 10.43.213.12610.43.213.127
4410.43.213.128/2510.43.213.129 – 10.43.213.25410.43.213.255
4510.43.214.0/2510.43.214.1 – 10.43.214.12610.43.214.127
4610.43.214.128/2510.43.214.129 – 10.43.214.25410.43.214.255
4710.43.215.0/2510.43.215.1 – 10.43.215.12610.43.215.127
4810.43.215.128/2510.43.215.129 – 10.43.215.25410.43.215.255
4910.43.216.0/2510.43.216.1 – 10.43.216.12610.43.216.127
5010.43.216.128/2510.43.216.129 – 10.43.216.25410.43.216.255
5110.43.217.0/2510.43.217.1 – 10.43.217.12610.43.217.127
5210.43.217.128/2510.43.217.129 – 10.43.217.25410.43.217.255
5310.43.218.0/2510.43.218.1 – 10.43.218.12610.43.218.127
5410.43.218.128/2510.43.218.129 – 10.43.218.25410.43.218.255
5510.43.219.0/2510.43.219.1 – 10.43.219.12610.43.219.127
5610.43.219.128/2510.43.219.129 – 10.43.219.25410.43.219.255
5710.43.220.0/2510.43.220.1 – 10.43.220.12610.43.220.127
5810.43.220.128/2510.43.220.129 – 10.43.220.25410.43.220.255
5910.43.221.0/2510.43.221.1 – 10.43.221.12610.43.221.127
6010.43.221.128/2510.43.221.129 – 10.43.221.25410.43.221.255
6110.43.222.0/2510.43.222.1 – 10.43.222.12610.43.222.127
6210.43.222.128/2510.43.222.129 – 10.43.222.25410.43.222.255
6310.43.223.0/2510.43.223.1 – 10.43.223.12610.43.223.127
6410.43.223.128/2510.43.223.129 – 10.43.223.25410.43.223.255
6510.43.224.0/2510.43.224.1 – 10.43.224.12610.43.224.127
6610.43.224.128/2510.43.224.129 – 10.43.224.25410.43.224.255
6710.43.225.0/2510.43.225.1 – 10.43.225.12610.43.225.127
6810.43.225.128/2510.43.225.129 – 10.43.225.25410.43.225.255
6910.43.226.0/2510.43.226.1 – 10.43.226.12610.43.226.127
7010.43.226.128/2510.43.226.129 – 10.43.226.25410.43.226.255
7110.43.227.0/2510.43.227.1 – 10.43.227.12610.43.227.127
7210.43.227.128/2510.43.227.129 – 10.43.227.25410.43.227.255
7310.43.228.0/2510.43.228.1 – 10.43.228.12610.43.228.127
7410.43.228.128/2510.43.228.129 – 10.43.228.25410.43.228.255
7510.43.229.0/2510.43.229.1 – 10.43.229.12610.43.229.127
7610.43.229.128/2510.43.229.129 – 10.43.229.25410.43.229.255
7710.43.230.0/2510.43.230.1 – 10.43.230.12610.43.230.127
7810.43.230.128/2510.43.230.129 – 10.43.230.25410.43.230.255
7910.43.231.0/2510.43.231.1 – 10.43.231.12610.43.231.127
8010.43.231.128/2510.43.231.129 – 10.43.231.25410.43.231.255
8110.43.232.0/2510.43.232.1 – 10.43.232.12610.43.232.127
8210.43.232.128/2510.43.232.129 – 10.43.232.25410.43.232.255
8310.43.233.0/2510.43.233.1 – 10.43.233.12610.43.233.127
8410.43.233.128/2510.43.233.129 – 10.43.233.25410.43.233.255
8510.43.234.0/2510.43.234.1 – 10.43.234.12610.43.234.127
8610.43.234.128/2510.43.234.129 – 10.43.234.25410.43.234.255
8710.43.235.0/2510.43.235.1 – 10.43.235.12610.43.235.127
8810.43.235.128/2510.43.235.129 – 10.43.235.25410.43.235.255
8910.43.236.0/2510.43.236.1 – 10.43.236.12610.43.236.127
9010.43.236.128/2510.43.236.129 – 10.43.236.25410.43.236.255
9110.43.237.0/2510.43.237.1 – 10.43.237.12610.43.237.127
9210.43.237.128/2510.43.237.129 – 10.43.237.25410.43.237.255
9310.43.238.0/2510.43.238.1 – 10.43.238.12610.43.238.127
9410.43.238.128/2510.43.238.129 – 10.43.238.25410.43.238.255
9510.43.239.0/2510.43.239.1 – 10.43.239.12610.43.239.127
9610.43.239.128/2510.43.239.129 – 10.43.239.25410.43.239.255
9710.43.240.0/2510.43.240.1 – 10.43.240.12610.43.240.127
9810.43.240.128/2510.43.240.129 – 10.43.240.25410.43.240.255
9910.43.241.0/2510.43.241.1 – 10.43.241.12610.43.241.127
10010.43.241.128/2510.43.241.129 – 10.43.241.25410.43.241.255
10110.43.242.0/2510.43.242.1 – 10.43.242.12610.43.242.127
10210.43.242.128/2510.43.242.129 – 10.43.242.25410.43.242.255
10310.43.243.0/2510.43.243.1 – 10.43.243.12610.43.243.127
10410.43.243.128/2510.43.243.129 – 10.43.243.25410.43.243.255
10510.43.244.0/2510.43.244.1 – 10.43.244.12610.43.244.127
10610.43.244.128/2510.43.244.129 – 10.43.244.25410.43.244.255
10710.43.245.0/2510.43.245.1 – 10.43.245.12610.43.245.127
10810.43.245.128/2510.43.245.129 – 10.43.245.25410.43.245.255
10910.43.246.0/2510.43.246.1 – 10.43.246.12610.43.246.127
11010.43.246.128/2510.43.246.129 – 10.43.246.25410.43.246.255
11110.43.247.0/2510.43.247.1 – 10.43.247.12610.43.247.127
11210.43.247.128/2510.43.247.129 – 10.43.247.25410.43.247.255
11310.43.248.0/2510.43.248.1 – 10.43.248.12610.43.248.127
11410.43.248.128/2510.43.248.129 – 10.43.248.25410.43.248.255
11510.43.249.0/2510.43.249.1 – 10.43.249.12610.43.249.127
11610.43.249.128/2510.43.249.129 – 10.43.249.25410.43.249.255
11710.43.250.0/2510.43.250.1 – 10.43.250.12610.43.250.127
11810.43.250.128/2510.43.250.129 – 10.43.250.25410.43.250.255
11910.43.251.0/2510.43.251.1 – 10.43.251.12610.43.251.127
12010.43.251.128/2510.43.251.129 – 10.43.251.25410.43.251.255
12110.43.252.0/2510.43.252.1 – 10.43.252.12610.43.252.127
12210.43.252.128/2510.43.252.129 – 10.43.252.25410.43.252.255
12310.43.253.0/2510.43.253.1 – 10.43.253.12610.43.253.127
12410.43.253.128/2510.43.253.129 – 10.43.253.25410.43.253.255
12510.43.254.0/2510.43.254.1 – 10.43.254.12610.43.254.127
12610.43.254.128/2510.43.254.129 – 10.43.254.25410.43.254.255
12710.43.255.0/2510.43.255.1 – 10.43.255.12610.43.255.127
12810.43.255.128/2510.43.255.129 – 10.43.255.25410.43.255.255
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 →