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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)10.8.224.0/19
network10.8.224.0/19
broadcast10.8.255.255
first host10.8.224.1
last host10.8.255.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.8.224.0/19
address00001010.00001000.11100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00001000.11100000.00000000
broadcast00001010.00001000.11111111.11111111
green = network part, grey = host part
hex0x0a08e000
decimal168353792
reverse dns0.224.8.10.in-addr.arpa
ipv4-mapped::ffff:a08:e000

/19 split into /25 · 64 subnets

close ×
#networkhost rangebroadcast
110.8.224.0/2510.8.224.1 – 10.8.224.12610.8.224.127
210.8.224.128/2510.8.224.129 – 10.8.224.25410.8.224.255
310.8.225.0/2510.8.225.1 – 10.8.225.12610.8.225.127
410.8.225.128/2510.8.225.129 – 10.8.225.25410.8.225.255
510.8.226.0/2510.8.226.1 – 10.8.226.12610.8.226.127
610.8.226.128/2510.8.226.129 – 10.8.226.25410.8.226.255
710.8.227.0/2510.8.227.1 – 10.8.227.12610.8.227.127
810.8.227.128/2510.8.227.129 – 10.8.227.25410.8.227.255
910.8.228.0/2510.8.228.1 – 10.8.228.12610.8.228.127
1010.8.228.128/2510.8.228.129 – 10.8.228.25410.8.228.255
1110.8.229.0/2510.8.229.1 – 10.8.229.12610.8.229.127
1210.8.229.128/2510.8.229.129 – 10.8.229.25410.8.229.255
1310.8.230.0/2510.8.230.1 – 10.8.230.12610.8.230.127
1410.8.230.128/2510.8.230.129 – 10.8.230.25410.8.230.255
1510.8.231.0/2510.8.231.1 – 10.8.231.12610.8.231.127
1610.8.231.128/2510.8.231.129 – 10.8.231.25410.8.231.255
1710.8.232.0/2510.8.232.1 – 10.8.232.12610.8.232.127
1810.8.232.128/2510.8.232.129 – 10.8.232.25410.8.232.255
1910.8.233.0/2510.8.233.1 – 10.8.233.12610.8.233.127
2010.8.233.128/2510.8.233.129 – 10.8.233.25410.8.233.255
2110.8.234.0/2510.8.234.1 – 10.8.234.12610.8.234.127
2210.8.234.128/2510.8.234.129 – 10.8.234.25410.8.234.255
2310.8.235.0/2510.8.235.1 – 10.8.235.12610.8.235.127
2410.8.235.128/2510.8.235.129 – 10.8.235.25410.8.235.255
2510.8.236.0/2510.8.236.1 – 10.8.236.12610.8.236.127
2610.8.236.128/2510.8.236.129 – 10.8.236.25410.8.236.255
2710.8.237.0/2510.8.237.1 – 10.8.237.12610.8.237.127
2810.8.237.128/2510.8.237.129 – 10.8.237.25410.8.237.255
2910.8.238.0/2510.8.238.1 – 10.8.238.12610.8.238.127
3010.8.238.128/2510.8.238.129 – 10.8.238.25410.8.238.255
3110.8.239.0/2510.8.239.1 – 10.8.239.12610.8.239.127
3210.8.239.128/2510.8.239.129 – 10.8.239.25410.8.239.255
3310.8.240.0/2510.8.240.1 – 10.8.240.12610.8.240.127
3410.8.240.128/2510.8.240.129 – 10.8.240.25410.8.240.255
3510.8.241.0/2510.8.241.1 – 10.8.241.12610.8.241.127
3610.8.241.128/2510.8.241.129 – 10.8.241.25410.8.241.255
3710.8.242.0/2510.8.242.1 – 10.8.242.12610.8.242.127
3810.8.242.128/2510.8.242.129 – 10.8.242.25410.8.242.255
3910.8.243.0/2510.8.243.1 – 10.8.243.12610.8.243.127
4010.8.243.128/2510.8.243.129 – 10.8.243.25410.8.243.255
4110.8.244.0/2510.8.244.1 – 10.8.244.12610.8.244.127
4210.8.244.128/2510.8.244.129 – 10.8.244.25410.8.244.255
4310.8.245.0/2510.8.245.1 – 10.8.245.12610.8.245.127
4410.8.245.128/2510.8.245.129 – 10.8.245.25410.8.245.255
4510.8.246.0/2510.8.246.1 – 10.8.246.12610.8.246.127
4610.8.246.128/2510.8.246.129 – 10.8.246.25410.8.246.255
4710.8.247.0/2510.8.247.1 – 10.8.247.12610.8.247.127
4810.8.247.128/2510.8.247.129 – 10.8.247.25410.8.247.255
4910.8.248.0/2510.8.248.1 – 10.8.248.12610.8.248.127
5010.8.248.128/2510.8.248.129 – 10.8.248.25410.8.248.255
5110.8.249.0/2510.8.249.1 – 10.8.249.12610.8.249.127
5210.8.249.128/2510.8.249.129 – 10.8.249.25410.8.249.255
5310.8.250.0/2510.8.250.1 – 10.8.250.12610.8.250.127
5410.8.250.128/2510.8.250.129 – 10.8.250.25410.8.250.255
5510.8.251.0/2510.8.251.1 – 10.8.251.12610.8.251.127
5610.8.251.128/2510.8.251.129 – 10.8.251.25410.8.251.255
5710.8.252.0/2510.8.252.1 – 10.8.252.12610.8.252.127
5810.8.252.128/2510.8.252.129 – 10.8.252.25410.8.252.255
5910.8.253.0/2510.8.253.1 – 10.8.253.12610.8.253.127
6010.8.253.128/2510.8.253.129 – 10.8.253.25410.8.253.255
6110.8.254.0/2510.8.254.1 – 10.8.254.12610.8.254.127
6210.8.254.128/2510.8.254.129 – 10.8.254.25410.8.254.255
6310.8.255.0/2510.8.255.1 – 10.8.255.12610.8.255.127
6410.8.255.128/2510.8.255.129 – 10.8.255.25410.8.255.255
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 →