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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)10.22.224.0/19
network10.22.224.0/19
broadcast10.22.255.255
first host10.22.224.1
last host10.22.255.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.22.224.0/19
address00001010.00010110.11100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010110.11100000.00000000
broadcast00001010.00010110.11111111.11111111
green = network part, grey = host part
hex0x0a16e000
decimal169271296
reverse dns0.224.22.10.in-addr.arpa
ipv4-mapped::ffff:a16:e000

/19 split into /25 · 64 subnets

close ×
#networkhost rangebroadcast
110.22.224.0/2510.22.224.1 – 10.22.224.12610.22.224.127
210.22.224.128/2510.22.224.129 – 10.22.224.25410.22.224.255
310.22.225.0/2510.22.225.1 – 10.22.225.12610.22.225.127
410.22.225.128/2510.22.225.129 – 10.22.225.25410.22.225.255
510.22.226.0/2510.22.226.1 – 10.22.226.12610.22.226.127
610.22.226.128/2510.22.226.129 – 10.22.226.25410.22.226.255
710.22.227.0/2510.22.227.1 – 10.22.227.12610.22.227.127
810.22.227.128/2510.22.227.129 – 10.22.227.25410.22.227.255
910.22.228.0/2510.22.228.1 – 10.22.228.12610.22.228.127
1010.22.228.128/2510.22.228.129 – 10.22.228.25410.22.228.255
1110.22.229.0/2510.22.229.1 – 10.22.229.12610.22.229.127
1210.22.229.128/2510.22.229.129 – 10.22.229.25410.22.229.255
1310.22.230.0/2510.22.230.1 – 10.22.230.12610.22.230.127
1410.22.230.128/2510.22.230.129 – 10.22.230.25410.22.230.255
1510.22.231.0/2510.22.231.1 – 10.22.231.12610.22.231.127
1610.22.231.128/2510.22.231.129 – 10.22.231.25410.22.231.255
1710.22.232.0/2510.22.232.1 – 10.22.232.12610.22.232.127
1810.22.232.128/2510.22.232.129 – 10.22.232.25410.22.232.255
1910.22.233.0/2510.22.233.1 – 10.22.233.12610.22.233.127
2010.22.233.128/2510.22.233.129 – 10.22.233.25410.22.233.255
2110.22.234.0/2510.22.234.1 – 10.22.234.12610.22.234.127
2210.22.234.128/2510.22.234.129 – 10.22.234.25410.22.234.255
2310.22.235.0/2510.22.235.1 – 10.22.235.12610.22.235.127
2410.22.235.128/2510.22.235.129 – 10.22.235.25410.22.235.255
2510.22.236.0/2510.22.236.1 – 10.22.236.12610.22.236.127
2610.22.236.128/2510.22.236.129 – 10.22.236.25410.22.236.255
2710.22.237.0/2510.22.237.1 – 10.22.237.12610.22.237.127
2810.22.237.128/2510.22.237.129 – 10.22.237.25410.22.237.255
2910.22.238.0/2510.22.238.1 – 10.22.238.12610.22.238.127
3010.22.238.128/2510.22.238.129 – 10.22.238.25410.22.238.255
3110.22.239.0/2510.22.239.1 – 10.22.239.12610.22.239.127
3210.22.239.128/2510.22.239.129 – 10.22.239.25410.22.239.255
3310.22.240.0/2510.22.240.1 – 10.22.240.12610.22.240.127
3410.22.240.128/2510.22.240.129 – 10.22.240.25410.22.240.255
3510.22.241.0/2510.22.241.1 – 10.22.241.12610.22.241.127
3610.22.241.128/2510.22.241.129 – 10.22.241.25410.22.241.255
3710.22.242.0/2510.22.242.1 – 10.22.242.12610.22.242.127
3810.22.242.128/2510.22.242.129 – 10.22.242.25410.22.242.255
3910.22.243.0/2510.22.243.1 – 10.22.243.12610.22.243.127
4010.22.243.128/2510.22.243.129 – 10.22.243.25410.22.243.255
4110.22.244.0/2510.22.244.1 – 10.22.244.12610.22.244.127
4210.22.244.128/2510.22.244.129 – 10.22.244.25410.22.244.255
4310.22.245.0/2510.22.245.1 – 10.22.245.12610.22.245.127
4410.22.245.128/2510.22.245.129 – 10.22.245.25410.22.245.255
4510.22.246.0/2510.22.246.1 – 10.22.246.12610.22.246.127
4610.22.246.128/2510.22.246.129 – 10.22.246.25410.22.246.255
4710.22.247.0/2510.22.247.1 – 10.22.247.12610.22.247.127
4810.22.247.128/2510.22.247.129 – 10.22.247.25410.22.247.255
4910.22.248.0/2510.22.248.1 – 10.22.248.12610.22.248.127
5010.22.248.128/2510.22.248.129 – 10.22.248.25410.22.248.255
5110.22.249.0/2510.22.249.1 – 10.22.249.12610.22.249.127
5210.22.249.128/2510.22.249.129 – 10.22.249.25410.22.249.255
5310.22.250.0/2510.22.250.1 – 10.22.250.12610.22.250.127
5410.22.250.128/2510.22.250.129 – 10.22.250.25410.22.250.255
5510.22.251.0/2510.22.251.1 – 10.22.251.12610.22.251.127
5610.22.251.128/2510.22.251.129 – 10.22.251.25410.22.251.255
5710.22.252.0/2510.22.252.1 – 10.22.252.12610.22.252.127
5810.22.252.128/2510.22.252.129 – 10.22.252.25410.22.252.255
5910.22.253.0/2510.22.253.1 – 10.22.253.12610.22.253.127
6010.22.253.128/2510.22.253.129 – 10.22.253.25410.22.253.255
6110.22.254.0/2510.22.254.1 – 10.22.254.12610.22.254.127
6210.22.254.128/2510.22.254.129 – 10.22.254.25410.22.254.255
6310.22.255.0/2510.22.255.1 – 10.22.255.12610.22.255.127
6410.22.255.128/2510.22.255.129 – 10.22.255.25410.22.255.255
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 →