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)10.4.192.0/19
network10.4.192.0/19
broadcast10.4.223.255
first host10.4.192.1
last host10.4.223.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.4.192.0/19
address00001010.00000100.11000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00000100.11000000.00000000
broadcast00001010.00000100.11011111.11111111
green = network part, grey = host part
hex0x0a04c000
decimal168083456
reverse dns0.192.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:c000

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.4.192.0/2610.4.192.1 – 10.4.192.6210.4.192.63
210.4.192.64/2610.4.192.65 – 10.4.192.12610.4.192.127
310.4.192.128/2610.4.192.129 – 10.4.192.19010.4.192.191
410.4.192.192/2610.4.192.193 – 10.4.192.25410.4.192.255
510.4.193.0/2610.4.193.1 – 10.4.193.6210.4.193.63
610.4.193.64/2610.4.193.65 – 10.4.193.12610.4.193.127
710.4.193.128/2610.4.193.129 – 10.4.193.19010.4.193.191
810.4.193.192/2610.4.193.193 – 10.4.193.25410.4.193.255
910.4.194.0/2610.4.194.1 – 10.4.194.6210.4.194.63
1010.4.194.64/2610.4.194.65 – 10.4.194.12610.4.194.127
1110.4.194.128/2610.4.194.129 – 10.4.194.19010.4.194.191
1210.4.194.192/2610.4.194.193 – 10.4.194.25410.4.194.255
1310.4.195.0/2610.4.195.1 – 10.4.195.6210.4.195.63
1410.4.195.64/2610.4.195.65 – 10.4.195.12610.4.195.127
1510.4.195.128/2610.4.195.129 – 10.4.195.19010.4.195.191
1610.4.195.192/2610.4.195.193 – 10.4.195.25410.4.195.255
1710.4.196.0/2610.4.196.1 – 10.4.196.6210.4.196.63
1810.4.196.64/2610.4.196.65 – 10.4.196.12610.4.196.127
1910.4.196.128/2610.4.196.129 – 10.4.196.19010.4.196.191
2010.4.196.192/2610.4.196.193 – 10.4.196.25410.4.196.255
2110.4.197.0/2610.4.197.1 – 10.4.197.6210.4.197.63
2210.4.197.64/2610.4.197.65 – 10.4.197.12610.4.197.127
2310.4.197.128/2610.4.197.129 – 10.4.197.19010.4.197.191
2410.4.197.192/2610.4.197.193 – 10.4.197.25410.4.197.255
2510.4.198.0/2610.4.198.1 – 10.4.198.6210.4.198.63
2610.4.198.64/2610.4.198.65 – 10.4.198.12610.4.198.127
2710.4.198.128/2610.4.198.129 – 10.4.198.19010.4.198.191
2810.4.198.192/2610.4.198.193 – 10.4.198.25410.4.198.255
2910.4.199.0/2610.4.199.1 – 10.4.199.6210.4.199.63
3010.4.199.64/2610.4.199.65 – 10.4.199.12610.4.199.127
3110.4.199.128/2610.4.199.129 – 10.4.199.19010.4.199.191
3210.4.199.192/2610.4.199.193 – 10.4.199.25410.4.199.255
3310.4.200.0/2610.4.200.1 – 10.4.200.6210.4.200.63
3410.4.200.64/2610.4.200.65 – 10.4.200.12610.4.200.127
3510.4.200.128/2610.4.200.129 – 10.4.200.19010.4.200.191
3610.4.200.192/2610.4.200.193 – 10.4.200.25410.4.200.255
3710.4.201.0/2610.4.201.1 – 10.4.201.6210.4.201.63
3810.4.201.64/2610.4.201.65 – 10.4.201.12610.4.201.127
3910.4.201.128/2610.4.201.129 – 10.4.201.19010.4.201.191
4010.4.201.192/2610.4.201.193 – 10.4.201.25410.4.201.255
4110.4.202.0/2610.4.202.1 – 10.4.202.6210.4.202.63
4210.4.202.64/2610.4.202.65 – 10.4.202.12610.4.202.127
4310.4.202.128/2610.4.202.129 – 10.4.202.19010.4.202.191
4410.4.202.192/2610.4.202.193 – 10.4.202.25410.4.202.255
4510.4.203.0/2610.4.203.1 – 10.4.203.6210.4.203.63
4610.4.203.64/2610.4.203.65 – 10.4.203.12610.4.203.127
4710.4.203.128/2610.4.203.129 – 10.4.203.19010.4.203.191
4810.4.203.192/2610.4.203.193 – 10.4.203.25410.4.203.255
4910.4.204.0/2610.4.204.1 – 10.4.204.6210.4.204.63
5010.4.204.64/2610.4.204.65 – 10.4.204.12610.4.204.127
5110.4.204.128/2610.4.204.129 – 10.4.204.19010.4.204.191
5210.4.204.192/2610.4.204.193 – 10.4.204.25410.4.204.255
5310.4.205.0/2610.4.205.1 – 10.4.205.6210.4.205.63
5410.4.205.64/2610.4.205.65 – 10.4.205.12610.4.205.127
5510.4.205.128/2610.4.205.129 – 10.4.205.19010.4.205.191
5610.4.205.192/2610.4.205.193 – 10.4.205.25410.4.205.255
5710.4.206.0/2610.4.206.1 – 10.4.206.6210.4.206.63
5810.4.206.64/2610.4.206.65 – 10.4.206.12610.4.206.127
5910.4.206.128/2610.4.206.129 – 10.4.206.19010.4.206.191
6010.4.206.192/2610.4.206.193 – 10.4.206.25410.4.206.255
6110.4.207.0/2610.4.207.1 – 10.4.207.6210.4.207.63
6210.4.207.64/2610.4.207.65 – 10.4.207.12610.4.207.127
6310.4.207.128/2610.4.207.129 – 10.4.207.19010.4.207.191
6410.4.207.192/2610.4.207.193 – 10.4.207.25410.4.207.255
6510.4.208.0/2610.4.208.1 – 10.4.208.6210.4.208.63
6610.4.208.64/2610.4.208.65 – 10.4.208.12610.4.208.127
6710.4.208.128/2610.4.208.129 – 10.4.208.19010.4.208.191
6810.4.208.192/2610.4.208.193 – 10.4.208.25410.4.208.255
6910.4.209.0/2610.4.209.1 – 10.4.209.6210.4.209.63
7010.4.209.64/2610.4.209.65 – 10.4.209.12610.4.209.127
7110.4.209.128/2610.4.209.129 – 10.4.209.19010.4.209.191
7210.4.209.192/2610.4.209.193 – 10.4.209.25410.4.209.255
7310.4.210.0/2610.4.210.1 – 10.4.210.6210.4.210.63
7410.4.210.64/2610.4.210.65 – 10.4.210.12610.4.210.127
7510.4.210.128/2610.4.210.129 – 10.4.210.19010.4.210.191
7610.4.210.192/2610.4.210.193 – 10.4.210.25410.4.210.255
7710.4.211.0/2610.4.211.1 – 10.4.211.6210.4.211.63
7810.4.211.64/2610.4.211.65 – 10.4.211.12610.4.211.127
7910.4.211.128/2610.4.211.129 – 10.4.211.19010.4.211.191
8010.4.211.192/2610.4.211.193 – 10.4.211.25410.4.211.255
8110.4.212.0/2610.4.212.1 – 10.4.212.6210.4.212.63
8210.4.212.64/2610.4.212.65 – 10.4.212.12610.4.212.127
8310.4.212.128/2610.4.212.129 – 10.4.212.19010.4.212.191
8410.4.212.192/2610.4.212.193 – 10.4.212.25410.4.212.255
8510.4.213.0/2610.4.213.1 – 10.4.213.6210.4.213.63
8610.4.213.64/2610.4.213.65 – 10.4.213.12610.4.213.127
8710.4.213.128/2610.4.213.129 – 10.4.213.19010.4.213.191
8810.4.213.192/2610.4.213.193 – 10.4.213.25410.4.213.255
8910.4.214.0/2610.4.214.1 – 10.4.214.6210.4.214.63
9010.4.214.64/2610.4.214.65 – 10.4.214.12610.4.214.127
9110.4.214.128/2610.4.214.129 – 10.4.214.19010.4.214.191
9210.4.214.192/2610.4.214.193 – 10.4.214.25410.4.214.255
9310.4.215.0/2610.4.215.1 – 10.4.215.6210.4.215.63
9410.4.215.64/2610.4.215.65 – 10.4.215.12610.4.215.127
9510.4.215.128/2610.4.215.129 – 10.4.215.19010.4.215.191
9610.4.215.192/2610.4.215.193 – 10.4.215.25410.4.215.255
9710.4.216.0/2610.4.216.1 – 10.4.216.6210.4.216.63
9810.4.216.64/2610.4.216.65 – 10.4.216.12610.4.216.127
9910.4.216.128/2610.4.216.129 – 10.4.216.19010.4.216.191
10010.4.216.192/2610.4.216.193 – 10.4.216.25410.4.216.255
10110.4.217.0/2610.4.217.1 – 10.4.217.6210.4.217.63
10210.4.217.64/2610.4.217.65 – 10.4.217.12610.4.217.127
10310.4.217.128/2610.4.217.129 – 10.4.217.19010.4.217.191
10410.4.217.192/2610.4.217.193 – 10.4.217.25410.4.217.255
10510.4.218.0/2610.4.218.1 – 10.4.218.6210.4.218.63
10610.4.218.64/2610.4.218.65 – 10.4.218.12610.4.218.127
10710.4.218.128/2610.4.218.129 – 10.4.218.19010.4.218.191
10810.4.218.192/2610.4.218.193 – 10.4.218.25410.4.218.255
10910.4.219.0/2610.4.219.1 – 10.4.219.6210.4.219.63
11010.4.219.64/2610.4.219.65 – 10.4.219.12610.4.219.127
11110.4.219.128/2610.4.219.129 – 10.4.219.19010.4.219.191
11210.4.219.192/2610.4.219.193 – 10.4.219.25410.4.219.255
11310.4.220.0/2610.4.220.1 – 10.4.220.6210.4.220.63
11410.4.220.64/2610.4.220.65 – 10.4.220.12610.4.220.127
11510.4.220.128/2610.4.220.129 – 10.4.220.19010.4.220.191
11610.4.220.192/2610.4.220.193 – 10.4.220.25410.4.220.255
11710.4.221.0/2610.4.221.1 – 10.4.221.6210.4.221.63
11810.4.221.64/2610.4.221.65 – 10.4.221.12610.4.221.127
11910.4.221.128/2610.4.221.129 – 10.4.221.19010.4.221.191
12010.4.221.192/2610.4.221.193 – 10.4.221.25410.4.221.255
12110.4.222.0/2610.4.222.1 – 10.4.222.6210.4.222.63
12210.4.222.64/2610.4.222.65 – 10.4.222.12610.4.222.127
12310.4.222.128/2610.4.222.129 – 10.4.222.19010.4.222.191
12410.4.222.192/2610.4.222.193 – 10.4.222.25410.4.222.255
12510.4.223.0/2610.4.223.1 – 10.4.223.6210.4.223.63
12610.4.223.64/2610.4.223.65 – 10.4.223.12610.4.223.127
12710.4.223.128/2610.4.223.129 – 10.4.223.19010.4.223.191
12810.4.223.192/2610.4.223.193 – 10.4.223.25410.4.223.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /19
/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-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,1901
/20255.255.240.04,0964,0942 split →
/21255.255.248.02,0482,0464 split →
/22255.255.252.01,0241,0228 split →
/23255.255.254.051251016 split →
/24255.255.255.025625432 split →
/25255.255.255.12812812664 split →
/26255.255.255.1926462128 split →
/27255.255.255.2243230256 split →
/28255.255.255.2401614512 split →
/29255.255.255.248861,024 split →
/30255.255.255.252422,048 split →
/31255.255.255.254224,096 split →
/32255.255.255.255118,192 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 →