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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)10.13.96.0/19
network10.13.96.0/19
broadcast10.13.127.255
first host10.13.96.1
last host10.13.127.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.13.96.0/19
address00001010.00001101.01100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00001101.01100000.00000000
broadcast00001010.00001101.01111111.11111111
green = network part, grey = host part
hex0x0a0d6000
decimal168648704
reverse dns0.96.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:6000

/19 split into /25 · 64 subnets

close ×
#networkhost rangebroadcast
110.13.96.0/2510.13.96.1 – 10.13.96.12610.13.96.127
210.13.96.128/2510.13.96.129 – 10.13.96.25410.13.96.255
310.13.97.0/2510.13.97.1 – 10.13.97.12610.13.97.127
410.13.97.128/2510.13.97.129 – 10.13.97.25410.13.97.255
510.13.98.0/2510.13.98.1 – 10.13.98.12610.13.98.127
610.13.98.128/2510.13.98.129 – 10.13.98.25410.13.98.255
710.13.99.0/2510.13.99.1 – 10.13.99.12610.13.99.127
810.13.99.128/2510.13.99.129 – 10.13.99.25410.13.99.255
910.13.100.0/2510.13.100.1 – 10.13.100.12610.13.100.127
1010.13.100.128/2510.13.100.129 – 10.13.100.25410.13.100.255
1110.13.101.0/2510.13.101.1 – 10.13.101.12610.13.101.127
1210.13.101.128/2510.13.101.129 – 10.13.101.25410.13.101.255
1310.13.102.0/2510.13.102.1 – 10.13.102.12610.13.102.127
1410.13.102.128/2510.13.102.129 – 10.13.102.25410.13.102.255
1510.13.103.0/2510.13.103.1 – 10.13.103.12610.13.103.127
1610.13.103.128/2510.13.103.129 – 10.13.103.25410.13.103.255
1710.13.104.0/2510.13.104.1 – 10.13.104.12610.13.104.127
1810.13.104.128/2510.13.104.129 – 10.13.104.25410.13.104.255
1910.13.105.0/2510.13.105.1 – 10.13.105.12610.13.105.127
2010.13.105.128/2510.13.105.129 – 10.13.105.25410.13.105.255
2110.13.106.0/2510.13.106.1 – 10.13.106.12610.13.106.127
2210.13.106.128/2510.13.106.129 – 10.13.106.25410.13.106.255
2310.13.107.0/2510.13.107.1 – 10.13.107.12610.13.107.127
2410.13.107.128/2510.13.107.129 – 10.13.107.25410.13.107.255
2510.13.108.0/2510.13.108.1 – 10.13.108.12610.13.108.127
2610.13.108.128/2510.13.108.129 – 10.13.108.25410.13.108.255
2710.13.109.0/2510.13.109.1 – 10.13.109.12610.13.109.127
2810.13.109.128/2510.13.109.129 – 10.13.109.25410.13.109.255
2910.13.110.0/2510.13.110.1 – 10.13.110.12610.13.110.127
3010.13.110.128/2510.13.110.129 – 10.13.110.25410.13.110.255
3110.13.111.0/2510.13.111.1 – 10.13.111.12610.13.111.127
3210.13.111.128/2510.13.111.129 – 10.13.111.25410.13.111.255
3310.13.112.0/2510.13.112.1 – 10.13.112.12610.13.112.127
3410.13.112.128/2510.13.112.129 – 10.13.112.25410.13.112.255
3510.13.113.0/2510.13.113.1 – 10.13.113.12610.13.113.127
3610.13.113.128/2510.13.113.129 – 10.13.113.25410.13.113.255
3710.13.114.0/2510.13.114.1 – 10.13.114.12610.13.114.127
3810.13.114.128/2510.13.114.129 – 10.13.114.25410.13.114.255
3910.13.115.0/2510.13.115.1 – 10.13.115.12610.13.115.127
4010.13.115.128/2510.13.115.129 – 10.13.115.25410.13.115.255
4110.13.116.0/2510.13.116.1 – 10.13.116.12610.13.116.127
4210.13.116.128/2510.13.116.129 – 10.13.116.25410.13.116.255
4310.13.117.0/2510.13.117.1 – 10.13.117.12610.13.117.127
4410.13.117.128/2510.13.117.129 – 10.13.117.25410.13.117.255
4510.13.118.0/2510.13.118.1 – 10.13.118.12610.13.118.127
4610.13.118.128/2510.13.118.129 – 10.13.118.25410.13.118.255
4710.13.119.0/2510.13.119.1 – 10.13.119.12610.13.119.127
4810.13.119.128/2510.13.119.129 – 10.13.119.25410.13.119.255
4910.13.120.0/2510.13.120.1 – 10.13.120.12610.13.120.127
5010.13.120.128/2510.13.120.129 – 10.13.120.25410.13.120.255
5110.13.121.0/2510.13.121.1 – 10.13.121.12610.13.121.127
5210.13.121.128/2510.13.121.129 – 10.13.121.25410.13.121.255
5310.13.122.0/2510.13.122.1 – 10.13.122.12610.13.122.127
5410.13.122.128/2510.13.122.129 – 10.13.122.25410.13.122.255
5510.13.123.0/2510.13.123.1 – 10.13.123.12610.13.123.127
5610.13.123.128/2510.13.123.129 – 10.13.123.25410.13.123.255
5710.13.124.0/2510.13.124.1 – 10.13.124.12610.13.124.127
5810.13.124.128/2510.13.124.129 – 10.13.124.25410.13.124.255
5910.13.125.0/2510.13.125.1 – 10.13.125.12610.13.125.127
6010.13.125.128/2510.13.125.129 – 10.13.125.25410.13.125.255
6110.13.126.0/2510.13.126.1 – 10.13.126.12610.13.126.127
6210.13.126.128/2510.13.126.129 – 10.13.126.25410.13.126.255
6310.13.127.0/2510.13.127.1 – 10.13.127.12610.13.127.127
6410.13.127.128/2510.13.127.129 – 10.13.127.25410.13.127.255
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 →