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)10.49.192.0/18
network10.49.192.0/18
broadcast10.49.255.255
first host10.49.192.1
last host10.49.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.49.192.0/18
address00001010.00110001.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00110001.11000000.00000000
broadcast00001010.00110001.11111111.11111111
green = network part, grey = host part
hex0x0a31c000
decimal171032576
reverse dns0.192.49.10.in-addr.arpa
ipv4-mapped::ffff:a31:c000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.49.192.0/2510.49.192.1 – 10.49.192.12610.49.192.127
210.49.192.128/2510.49.192.129 – 10.49.192.25410.49.192.255
310.49.193.0/2510.49.193.1 – 10.49.193.12610.49.193.127
410.49.193.128/2510.49.193.129 – 10.49.193.25410.49.193.255
510.49.194.0/2510.49.194.1 – 10.49.194.12610.49.194.127
610.49.194.128/2510.49.194.129 – 10.49.194.25410.49.194.255
710.49.195.0/2510.49.195.1 – 10.49.195.12610.49.195.127
810.49.195.128/2510.49.195.129 – 10.49.195.25410.49.195.255
910.49.196.0/2510.49.196.1 – 10.49.196.12610.49.196.127
1010.49.196.128/2510.49.196.129 – 10.49.196.25410.49.196.255
1110.49.197.0/2510.49.197.1 – 10.49.197.12610.49.197.127
1210.49.197.128/2510.49.197.129 – 10.49.197.25410.49.197.255
1310.49.198.0/2510.49.198.1 – 10.49.198.12610.49.198.127
1410.49.198.128/2510.49.198.129 – 10.49.198.25410.49.198.255
1510.49.199.0/2510.49.199.1 – 10.49.199.12610.49.199.127
1610.49.199.128/2510.49.199.129 – 10.49.199.25410.49.199.255
1710.49.200.0/2510.49.200.1 – 10.49.200.12610.49.200.127
1810.49.200.128/2510.49.200.129 – 10.49.200.25410.49.200.255
1910.49.201.0/2510.49.201.1 – 10.49.201.12610.49.201.127
2010.49.201.128/2510.49.201.129 – 10.49.201.25410.49.201.255
2110.49.202.0/2510.49.202.1 – 10.49.202.12610.49.202.127
2210.49.202.128/2510.49.202.129 – 10.49.202.25410.49.202.255
2310.49.203.0/2510.49.203.1 – 10.49.203.12610.49.203.127
2410.49.203.128/2510.49.203.129 – 10.49.203.25410.49.203.255
2510.49.204.0/2510.49.204.1 – 10.49.204.12610.49.204.127
2610.49.204.128/2510.49.204.129 – 10.49.204.25410.49.204.255
2710.49.205.0/2510.49.205.1 – 10.49.205.12610.49.205.127
2810.49.205.128/2510.49.205.129 – 10.49.205.25410.49.205.255
2910.49.206.0/2510.49.206.1 – 10.49.206.12610.49.206.127
3010.49.206.128/2510.49.206.129 – 10.49.206.25410.49.206.255
3110.49.207.0/2510.49.207.1 – 10.49.207.12610.49.207.127
3210.49.207.128/2510.49.207.129 – 10.49.207.25410.49.207.255
3310.49.208.0/2510.49.208.1 – 10.49.208.12610.49.208.127
3410.49.208.128/2510.49.208.129 – 10.49.208.25410.49.208.255
3510.49.209.0/2510.49.209.1 – 10.49.209.12610.49.209.127
3610.49.209.128/2510.49.209.129 – 10.49.209.25410.49.209.255
3710.49.210.0/2510.49.210.1 – 10.49.210.12610.49.210.127
3810.49.210.128/2510.49.210.129 – 10.49.210.25410.49.210.255
3910.49.211.0/2510.49.211.1 – 10.49.211.12610.49.211.127
4010.49.211.128/2510.49.211.129 – 10.49.211.25410.49.211.255
4110.49.212.0/2510.49.212.1 – 10.49.212.12610.49.212.127
4210.49.212.128/2510.49.212.129 – 10.49.212.25410.49.212.255
4310.49.213.0/2510.49.213.1 – 10.49.213.12610.49.213.127
4410.49.213.128/2510.49.213.129 – 10.49.213.25410.49.213.255
4510.49.214.0/2510.49.214.1 – 10.49.214.12610.49.214.127
4610.49.214.128/2510.49.214.129 – 10.49.214.25410.49.214.255
4710.49.215.0/2510.49.215.1 – 10.49.215.12610.49.215.127
4810.49.215.128/2510.49.215.129 – 10.49.215.25410.49.215.255
4910.49.216.0/2510.49.216.1 – 10.49.216.12610.49.216.127
5010.49.216.128/2510.49.216.129 – 10.49.216.25410.49.216.255
5110.49.217.0/2510.49.217.1 – 10.49.217.12610.49.217.127
5210.49.217.128/2510.49.217.129 – 10.49.217.25410.49.217.255
5310.49.218.0/2510.49.218.1 – 10.49.218.12610.49.218.127
5410.49.218.128/2510.49.218.129 – 10.49.218.25410.49.218.255
5510.49.219.0/2510.49.219.1 – 10.49.219.12610.49.219.127
5610.49.219.128/2510.49.219.129 – 10.49.219.25410.49.219.255
5710.49.220.0/2510.49.220.1 – 10.49.220.12610.49.220.127
5810.49.220.128/2510.49.220.129 – 10.49.220.25410.49.220.255
5910.49.221.0/2510.49.221.1 – 10.49.221.12610.49.221.127
6010.49.221.128/2510.49.221.129 – 10.49.221.25410.49.221.255
6110.49.222.0/2510.49.222.1 – 10.49.222.12610.49.222.127
6210.49.222.128/2510.49.222.129 – 10.49.222.25410.49.222.255
6310.49.223.0/2510.49.223.1 – 10.49.223.12610.49.223.127
6410.49.223.128/2510.49.223.129 – 10.49.223.25410.49.223.255
6510.49.224.0/2510.49.224.1 – 10.49.224.12610.49.224.127
6610.49.224.128/2510.49.224.129 – 10.49.224.25410.49.224.255
6710.49.225.0/2510.49.225.1 – 10.49.225.12610.49.225.127
6810.49.225.128/2510.49.225.129 – 10.49.225.25410.49.225.255
6910.49.226.0/2510.49.226.1 – 10.49.226.12610.49.226.127
7010.49.226.128/2510.49.226.129 – 10.49.226.25410.49.226.255
7110.49.227.0/2510.49.227.1 – 10.49.227.12610.49.227.127
7210.49.227.128/2510.49.227.129 – 10.49.227.25410.49.227.255
7310.49.228.0/2510.49.228.1 – 10.49.228.12610.49.228.127
7410.49.228.128/2510.49.228.129 – 10.49.228.25410.49.228.255
7510.49.229.0/2510.49.229.1 – 10.49.229.12610.49.229.127
7610.49.229.128/2510.49.229.129 – 10.49.229.25410.49.229.255
7710.49.230.0/2510.49.230.1 – 10.49.230.12610.49.230.127
7810.49.230.128/2510.49.230.129 – 10.49.230.25410.49.230.255
7910.49.231.0/2510.49.231.1 – 10.49.231.12610.49.231.127
8010.49.231.128/2510.49.231.129 – 10.49.231.25410.49.231.255
8110.49.232.0/2510.49.232.1 – 10.49.232.12610.49.232.127
8210.49.232.128/2510.49.232.129 – 10.49.232.25410.49.232.255
8310.49.233.0/2510.49.233.1 – 10.49.233.12610.49.233.127
8410.49.233.128/2510.49.233.129 – 10.49.233.25410.49.233.255
8510.49.234.0/2510.49.234.1 – 10.49.234.12610.49.234.127
8610.49.234.128/2510.49.234.129 – 10.49.234.25410.49.234.255
8710.49.235.0/2510.49.235.1 – 10.49.235.12610.49.235.127
8810.49.235.128/2510.49.235.129 – 10.49.235.25410.49.235.255
8910.49.236.0/2510.49.236.1 – 10.49.236.12610.49.236.127
9010.49.236.128/2510.49.236.129 – 10.49.236.25410.49.236.255
9110.49.237.0/2510.49.237.1 – 10.49.237.12610.49.237.127
9210.49.237.128/2510.49.237.129 – 10.49.237.25410.49.237.255
9310.49.238.0/2510.49.238.1 – 10.49.238.12610.49.238.127
9410.49.238.128/2510.49.238.129 – 10.49.238.25410.49.238.255
9510.49.239.0/2510.49.239.1 – 10.49.239.12610.49.239.127
9610.49.239.128/2510.49.239.129 – 10.49.239.25410.49.239.255
9710.49.240.0/2510.49.240.1 – 10.49.240.12610.49.240.127
9810.49.240.128/2510.49.240.129 – 10.49.240.25410.49.240.255
9910.49.241.0/2510.49.241.1 – 10.49.241.12610.49.241.127
10010.49.241.128/2510.49.241.129 – 10.49.241.25410.49.241.255
10110.49.242.0/2510.49.242.1 – 10.49.242.12610.49.242.127
10210.49.242.128/2510.49.242.129 – 10.49.242.25410.49.242.255
10310.49.243.0/2510.49.243.1 – 10.49.243.12610.49.243.127
10410.49.243.128/2510.49.243.129 – 10.49.243.25410.49.243.255
10510.49.244.0/2510.49.244.1 – 10.49.244.12610.49.244.127
10610.49.244.128/2510.49.244.129 – 10.49.244.25410.49.244.255
10710.49.245.0/2510.49.245.1 – 10.49.245.12610.49.245.127
10810.49.245.128/2510.49.245.129 – 10.49.245.25410.49.245.255
10910.49.246.0/2510.49.246.1 – 10.49.246.12610.49.246.127
11010.49.246.128/2510.49.246.129 – 10.49.246.25410.49.246.255
11110.49.247.0/2510.49.247.1 – 10.49.247.12610.49.247.127
11210.49.247.128/2510.49.247.129 – 10.49.247.25410.49.247.255
11310.49.248.0/2510.49.248.1 – 10.49.248.12610.49.248.127
11410.49.248.128/2510.49.248.129 – 10.49.248.25410.49.248.255
11510.49.249.0/2510.49.249.1 – 10.49.249.12610.49.249.127
11610.49.249.128/2510.49.249.129 – 10.49.249.25410.49.249.255
11710.49.250.0/2510.49.250.1 – 10.49.250.12610.49.250.127
11810.49.250.128/2510.49.250.129 – 10.49.250.25410.49.250.255
11910.49.251.0/2510.49.251.1 – 10.49.251.12610.49.251.127
12010.49.251.128/2510.49.251.129 – 10.49.251.25410.49.251.255
12110.49.252.0/2510.49.252.1 – 10.49.252.12610.49.252.127
12210.49.252.128/2510.49.252.129 – 10.49.252.25410.49.252.255
12310.49.253.0/2510.49.253.1 – 10.49.253.12610.49.253.127
12410.49.253.128/2510.49.253.129 – 10.49.253.25410.49.253.255
12510.49.254.0/2510.49.254.1 – 10.49.254.12610.49.254.127
12610.49.254.128/2510.49.254.129 – 10.49.254.25410.49.254.255
12710.49.255.0/2510.49.255.1 – 10.49.255.12610.49.255.127
12810.49.255.128/2510.49.255.129 – 10.49.255.25410.49.255.255
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 →