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)10.19.224.0/19
network10.19.224.0/19
broadcast10.19.255.255
first host10.19.224.1
last host10.19.255.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.19.224.0/19
address00001010.00010011.11100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010011.11100000.00000000
broadcast00001010.00010011.11111111.11111111
green = network part, grey = host part
hex0x0a13e000
decimal169074688
reverse dns0.224.19.10.in-addr.arpa
ipv4-mapped::ffff:a13:e000

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.19.224.0/2610.19.224.1 – 10.19.224.6210.19.224.63
210.19.224.64/2610.19.224.65 – 10.19.224.12610.19.224.127
310.19.224.128/2610.19.224.129 – 10.19.224.19010.19.224.191
410.19.224.192/2610.19.224.193 – 10.19.224.25410.19.224.255
510.19.225.0/2610.19.225.1 – 10.19.225.6210.19.225.63
610.19.225.64/2610.19.225.65 – 10.19.225.12610.19.225.127
710.19.225.128/2610.19.225.129 – 10.19.225.19010.19.225.191
810.19.225.192/2610.19.225.193 – 10.19.225.25410.19.225.255
910.19.226.0/2610.19.226.1 – 10.19.226.6210.19.226.63
1010.19.226.64/2610.19.226.65 – 10.19.226.12610.19.226.127
1110.19.226.128/2610.19.226.129 – 10.19.226.19010.19.226.191
1210.19.226.192/2610.19.226.193 – 10.19.226.25410.19.226.255
1310.19.227.0/2610.19.227.1 – 10.19.227.6210.19.227.63
1410.19.227.64/2610.19.227.65 – 10.19.227.12610.19.227.127
1510.19.227.128/2610.19.227.129 – 10.19.227.19010.19.227.191
1610.19.227.192/2610.19.227.193 – 10.19.227.25410.19.227.255
1710.19.228.0/2610.19.228.1 – 10.19.228.6210.19.228.63
1810.19.228.64/2610.19.228.65 – 10.19.228.12610.19.228.127
1910.19.228.128/2610.19.228.129 – 10.19.228.19010.19.228.191
2010.19.228.192/2610.19.228.193 – 10.19.228.25410.19.228.255
2110.19.229.0/2610.19.229.1 – 10.19.229.6210.19.229.63
2210.19.229.64/2610.19.229.65 – 10.19.229.12610.19.229.127
2310.19.229.128/2610.19.229.129 – 10.19.229.19010.19.229.191
2410.19.229.192/2610.19.229.193 – 10.19.229.25410.19.229.255
2510.19.230.0/2610.19.230.1 – 10.19.230.6210.19.230.63
2610.19.230.64/2610.19.230.65 – 10.19.230.12610.19.230.127
2710.19.230.128/2610.19.230.129 – 10.19.230.19010.19.230.191
2810.19.230.192/2610.19.230.193 – 10.19.230.25410.19.230.255
2910.19.231.0/2610.19.231.1 – 10.19.231.6210.19.231.63
3010.19.231.64/2610.19.231.65 – 10.19.231.12610.19.231.127
3110.19.231.128/2610.19.231.129 – 10.19.231.19010.19.231.191
3210.19.231.192/2610.19.231.193 – 10.19.231.25410.19.231.255
3310.19.232.0/2610.19.232.1 – 10.19.232.6210.19.232.63
3410.19.232.64/2610.19.232.65 – 10.19.232.12610.19.232.127
3510.19.232.128/2610.19.232.129 – 10.19.232.19010.19.232.191
3610.19.232.192/2610.19.232.193 – 10.19.232.25410.19.232.255
3710.19.233.0/2610.19.233.1 – 10.19.233.6210.19.233.63
3810.19.233.64/2610.19.233.65 – 10.19.233.12610.19.233.127
3910.19.233.128/2610.19.233.129 – 10.19.233.19010.19.233.191
4010.19.233.192/2610.19.233.193 – 10.19.233.25410.19.233.255
4110.19.234.0/2610.19.234.1 – 10.19.234.6210.19.234.63
4210.19.234.64/2610.19.234.65 – 10.19.234.12610.19.234.127
4310.19.234.128/2610.19.234.129 – 10.19.234.19010.19.234.191
4410.19.234.192/2610.19.234.193 – 10.19.234.25410.19.234.255
4510.19.235.0/2610.19.235.1 – 10.19.235.6210.19.235.63
4610.19.235.64/2610.19.235.65 – 10.19.235.12610.19.235.127
4710.19.235.128/2610.19.235.129 – 10.19.235.19010.19.235.191
4810.19.235.192/2610.19.235.193 – 10.19.235.25410.19.235.255
4910.19.236.0/2610.19.236.1 – 10.19.236.6210.19.236.63
5010.19.236.64/2610.19.236.65 – 10.19.236.12610.19.236.127
5110.19.236.128/2610.19.236.129 – 10.19.236.19010.19.236.191
5210.19.236.192/2610.19.236.193 – 10.19.236.25410.19.236.255
5310.19.237.0/2610.19.237.1 – 10.19.237.6210.19.237.63
5410.19.237.64/2610.19.237.65 – 10.19.237.12610.19.237.127
5510.19.237.128/2610.19.237.129 – 10.19.237.19010.19.237.191
5610.19.237.192/2610.19.237.193 – 10.19.237.25410.19.237.255
5710.19.238.0/2610.19.238.1 – 10.19.238.6210.19.238.63
5810.19.238.64/2610.19.238.65 – 10.19.238.12610.19.238.127
5910.19.238.128/2610.19.238.129 – 10.19.238.19010.19.238.191
6010.19.238.192/2610.19.238.193 – 10.19.238.25410.19.238.255
6110.19.239.0/2610.19.239.1 – 10.19.239.6210.19.239.63
6210.19.239.64/2610.19.239.65 – 10.19.239.12610.19.239.127
6310.19.239.128/2610.19.239.129 – 10.19.239.19010.19.239.191
6410.19.239.192/2610.19.239.193 – 10.19.239.25410.19.239.255
6510.19.240.0/2610.19.240.1 – 10.19.240.6210.19.240.63
6610.19.240.64/2610.19.240.65 – 10.19.240.12610.19.240.127
6710.19.240.128/2610.19.240.129 – 10.19.240.19010.19.240.191
6810.19.240.192/2610.19.240.193 – 10.19.240.25410.19.240.255
6910.19.241.0/2610.19.241.1 – 10.19.241.6210.19.241.63
7010.19.241.64/2610.19.241.65 – 10.19.241.12610.19.241.127
7110.19.241.128/2610.19.241.129 – 10.19.241.19010.19.241.191
7210.19.241.192/2610.19.241.193 – 10.19.241.25410.19.241.255
7310.19.242.0/2610.19.242.1 – 10.19.242.6210.19.242.63
7410.19.242.64/2610.19.242.65 – 10.19.242.12610.19.242.127
7510.19.242.128/2610.19.242.129 – 10.19.242.19010.19.242.191
7610.19.242.192/2610.19.242.193 – 10.19.242.25410.19.242.255
7710.19.243.0/2610.19.243.1 – 10.19.243.6210.19.243.63
7810.19.243.64/2610.19.243.65 – 10.19.243.12610.19.243.127
7910.19.243.128/2610.19.243.129 – 10.19.243.19010.19.243.191
8010.19.243.192/2610.19.243.193 – 10.19.243.25410.19.243.255
8110.19.244.0/2610.19.244.1 – 10.19.244.6210.19.244.63
8210.19.244.64/2610.19.244.65 – 10.19.244.12610.19.244.127
8310.19.244.128/2610.19.244.129 – 10.19.244.19010.19.244.191
8410.19.244.192/2610.19.244.193 – 10.19.244.25410.19.244.255
8510.19.245.0/2610.19.245.1 – 10.19.245.6210.19.245.63
8610.19.245.64/2610.19.245.65 – 10.19.245.12610.19.245.127
8710.19.245.128/2610.19.245.129 – 10.19.245.19010.19.245.191
8810.19.245.192/2610.19.245.193 – 10.19.245.25410.19.245.255
8910.19.246.0/2610.19.246.1 – 10.19.246.6210.19.246.63
9010.19.246.64/2610.19.246.65 – 10.19.246.12610.19.246.127
9110.19.246.128/2610.19.246.129 – 10.19.246.19010.19.246.191
9210.19.246.192/2610.19.246.193 – 10.19.246.25410.19.246.255
9310.19.247.0/2610.19.247.1 – 10.19.247.6210.19.247.63
9410.19.247.64/2610.19.247.65 – 10.19.247.12610.19.247.127
9510.19.247.128/2610.19.247.129 – 10.19.247.19010.19.247.191
9610.19.247.192/2610.19.247.193 – 10.19.247.25410.19.247.255
9710.19.248.0/2610.19.248.1 – 10.19.248.6210.19.248.63
9810.19.248.64/2610.19.248.65 – 10.19.248.12610.19.248.127
9910.19.248.128/2610.19.248.129 – 10.19.248.19010.19.248.191
10010.19.248.192/2610.19.248.193 – 10.19.248.25410.19.248.255
10110.19.249.0/2610.19.249.1 – 10.19.249.6210.19.249.63
10210.19.249.64/2610.19.249.65 – 10.19.249.12610.19.249.127
10310.19.249.128/2610.19.249.129 – 10.19.249.19010.19.249.191
10410.19.249.192/2610.19.249.193 – 10.19.249.25410.19.249.255
10510.19.250.0/2610.19.250.1 – 10.19.250.6210.19.250.63
10610.19.250.64/2610.19.250.65 – 10.19.250.12610.19.250.127
10710.19.250.128/2610.19.250.129 – 10.19.250.19010.19.250.191
10810.19.250.192/2610.19.250.193 – 10.19.250.25410.19.250.255
10910.19.251.0/2610.19.251.1 – 10.19.251.6210.19.251.63
11010.19.251.64/2610.19.251.65 – 10.19.251.12610.19.251.127
11110.19.251.128/2610.19.251.129 – 10.19.251.19010.19.251.191
11210.19.251.192/2610.19.251.193 – 10.19.251.25410.19.251.255
11310.19.252.0/2610.19.252.1 – 10.19.252.6210.19.252.63
11410.19.252.64/2610.19.252.65 – 10.19.252.12610.19.252.127
11510.19.252.128/2610.19.252.129 – 10.19.252.19010.19.252.191
11610.19.252.192/2610.19.252.193 – 10.19.252.25410.19.252.255
11710.19.253.0/2610.19.253.1 – 10.19.253.6210.19.253.63
11810.19.253.64/2610.19.253.65 – 10.19.253.12610.19.253.127
11910.19.253.128/2610.19.253.129 – 10.19.253.19010.19.253.191
12010.19.253.192/2610.19.253.193 – 10.19.253.25410.19.253.255
12110.19.254.0/2610.19.254.1 – 10.19.254.6210.19.254.63
12210.19.254.64/2610.19.254.65 – 10.19.254.12610.19.254.127
12310.19.254.128/2610.19.254.129 – 10.19.254.19010.19.254.191
12410.19.254.192/2610.19.254.193 – 10.19.254.25410.19.254.255
12510.19.255.0/2610.19.255.1 – 10.19.255.6210.19.255.63
12610.19.255.64/2610.19.255.65 – 10.19.255.12610.19.255.127
12710.19.255.128/2610.19.255.129 – 10.19.255.19010.19.255.191
12810.19.255.192/2610.19.255.193 – 10.19.255.25410.19.255.255
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 →