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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)10.167.96.0/19
network10.167.96.0/19
broadcast10.167.127.255
first host10.167.96.1
last host10.167.127.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.167.96.0/19
address00001010.10100111.01100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.10100111.01100000.00000000
broadcast00001010.10100111.01111111.11111111
green = network part, grey = host part
hex0x0aa76000
decimal178741248
reverse dns0.96.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:6000

/19 split into /25 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.96.0/2510.167.96.1 – 10.167.96.12610.167.96.127
210.167.96.128/2510.167.96.129 – 10.167.96.25410.167.96.255
310.167.97.0/2510.167.97.1 – 10.167.97.12610.167.97.127
410.167.97.128/2510.167.97.129 – 10.167.97.25410.167.97.255
510.167.98.0/2510.167.98.1 – 10.167.98.12610.167.98.127
610.167.98.128/2510.167.98.129 – 10.167.98.25410.167.98.255
710.167.99.0/2510.167.99.1 – 10.167.99.12610.167.99.127
810.167.99.128/2510.167.99.129 – 10.167.99.25410.167.99.255
910.167.100.0/2510.167.100.1 – 10.167.100.12610.167.100.127
1010.167.100.128/2510.167.100.129 – 10.167.100.25410.167.100.255
1110.167.101.0/2510.167.101.1 – 10.167.101.12610.167.101.127
1210.167.101.128/2510.167.101.129 – 10.167.101.25410.167.101.255
1310.167.102.0/2510.167.102.1 – 10.167.102.12610.167.102.127
1410.167.102.128/2510.167.102.129 – 10.167.102.25410.167.102.255
1510.167.103.0/2510.167.103.1 – 10.167.103.12610.167.103.127
1610.167.103.128/2510.167.103.129 – 10.167.103.25410.167.103.255
1710.167.104.0/2510.167.104.1 – 10.167.104.12610.167.104.127
1810.167.104.128/2510.167.104.129 – 10.167.104.25410.167.104.255
1910.167.105.0/2510.167.105.1 – 10.167.105.12610.167.105.127
2010.167.105.128/2510.167.105.129 – 10.167.105.25410.167.105.255
2110.167.106.0/2510.167.106.1 – 10.167.106.12610.167.106.127
2210.167.106.128/2510.167.106.129 – 10.167.106.25410.167.106.255
2310.167.107.0/2510.167.107.1 – 10.167.107.12610.167.107.127
2410.167.107.128/2510.167.107.129 – 10.167.107.25410.167.107.255
2510.167.108.0/2510.167.108.1 – 10.167.108.12610.167.108.127
2610.167.108.128/2510.167.108.129 – 10.167.108.25410.167.108.255
2710.167.109.0/2510.167.109.1 – 10.167.109.12610.167.109.127
2810.167.109.128/2510.167.109.129 – 10.167.109.25410.167.109.255
2910.167.110.0/2510.167.110.1 – 10.167.110.12610.167.110.127
3010.167.110.128/2510.167.110.129 – 10.167.110.25410.167.110.255
3110.167.111.0/2510.167.111.1 – 10.167.111.12610.167.111.127
3210.167.111.128/2510.167.111.129 – 10.167.111.25410.167.111.255
3310.167.112.0/2510.167.112.1 – 10.167.112.12610.167.112.127
3410.167.112.128/2510.167.112.129 – 10.167.112.25410.167.112.255
3510.167.113.0/2510.167.113.1 – 10.167.113.12610.167.113.127
3610.167.113.128/2510.167.113.129 – 10.167.113.25410.167.113.255
3710.167.114.0/2510.167.114.1 – 10.167.114.12610.167.114.127
3810.167.114.128/2510.167.114.129 – 10.167.114.25410.167.114.255
3910.167.115.0/2510.167.115.1 – 10.167.115.12610.167.115.127
4010.167.115.128/2510.167.115.129 – 10.167.115.25410.167.115.255
4110.167.116.0/2510.167.116.1 – 10.167.116.12610.167.116.127
4210.167.116.128/2510.167.116.129 – 10.167.116.25410.167.116.255
4310.167.117.0/2510.167.117.1 – 10.167.117.12610.167.117.127
4410.167.117.128/2510.167.117.129 – 10.167.117.25410.167.117.255
4510.167.118.0/2510.167.118.1 – 10.167.118.12610.167.118.127
4610.167.118.128/2510.167.118.129 – 10.167.118.25410.167.118.255
4710.167.119.0/2510.167.119.1 – 10.167.119.12610.167.119.127
4810.167.119.128/2510.167.119.129 – 10.167.119.25410.167.119.255
4910.167.120.0/2510.167.120.1 – 10.167.120.12610.167.120.127
5010.167.120.128/2510.167.120.129 – 10.167.120.25410.167.120.255
5110.167.121.0/2510.167.121.1 – 10.167.121.12610.167.121.127
5210.167.121.128/2510.167.121.129 – 10.167.121.25410.167.121.255
5310.167.122.0/2510.167.122.1 – 10.167.122.12610.167.122.127
5410.167.122.128/2510.167.122.129 – 10.167.122.25410.167.122.255
5510.167.123.0/2510.167.123.1 – 10.167.123.12610.167.123.127
5610.167.123.128/2510.167.123.129 – 10.167.123.25410.167.123.255
5710.167.124.0/2510.167.124.1 – 10.167.124.12610.167.124.127
5810.167.124.128/2510.167.124.129 – 10.167.124.25410.167.124.255
5910.167.125.0/2510.167.125.1 – 10.167.125.12610.167.125.127
6010.167.125.128/2510.167.125.129 – 10.167.125.25410.167.125.255
6110.167.126.0/2510.167.126.1 – 10.167.126.12610.167.126.127
6210.167.126.128/2510.167.126.129 – 10.167.126.25410.167.126.255
6310.167.127.0/2510.167.127.1 – 10.167.127.12610.167.127.127
6410.167.127.128/2510.167.127.129 – 10.167.127.25410.167.127.255
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 →