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)10.72.0.0/19
network10.72.0.0/19
broadcast10.72.31.255
first host10.72.0.1
last host10.72.31.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.72.0.0/19
address00001010.01001000.00000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.01001000.00000000.00000000
broadcast00001010.01001000.00011111.11111111
green = network part, grey = host part
hex0x0a480000
decimal172490752
reverse dns0.0.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:0

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.0.0/2610.72.0.1 – 10.72.0.6210.72.0.63
210.72.0.64/2610.72.0.65 – 10.72.0.12610.72.0.127
310.72.0.128/2610.72.0.129 – 10.72.0.19010.72.0.191
410.72.0.192/2610.72.0.193 – 10.72.0.25410.72.0.255
510.72.1.0/2610.72.1.1 – 10.72.1.6210.72.1.63
610.72.1.64/2610.72.1.65 – 10.72.1.12610.72.1.127
710.72.1.128/2610.72.1.129 – 10.72.1.19010.72.1.191
810.72.1.192/2610.72.1.193 – 10.72.1.25410.72.1.255
910.72.2.0/2610.72.2.1 – 10.72.2.6210.72.2.63
1010.72.2.64/2610.72.2.65 – 10.72.2.12610.72.2.127
1110.72.2.128/2610.72.2.129 – 10.72.2.19010.72.2.191
1210.72.2.192/2610.72.2.193 – 10.72.2.25410.72.2.255
1310.72.3.0/2610.72.3.1 – 10.72.3.6210.72.3.63
1410.72.3.64/2610.72.3.65 – 10.72.3.12610.72.3.127
1510.72.3.128/2610.72.3.129 – 10.72.3.19010.72.3.191
1610.72.3.192/2610.72.3.193 – 10.72.3.25410.72.3.255
1710.72.4.0/2610.72.4.1 – 10.72.4.6210.72.4.63
1810.72.4.64/2610.72.4.65 – 10.72.4.12610.72.4.127
1910.72.4.128/2610.72.4.129 – 10.72.4.19010.72.4.191
2010.72.4.192/2610.72.4.193 – 10.72.4.25410.72.4.255
2110.72.5.0/2610.72.5.1 – 10.72.5.6210.72.5.63
2210.72.5.64/2610.72.5.65 – 10.72.5.12610.72.5.127
2310.72.5.128/2610.72.5.129 – 10.72.5.19010.72.5.191
2410.72.5.192/2610.72.5.193 – 10.72.5.25410.72.5.255
2510.72.6.0/2610.72.6.1 – 10.72.6.6210.72.6.63
2610.72.6.64/2610.72.6.65 – 10.72.6.12610.72.6.127
2710.72.6.128/2610.72.6.129 – 10.72.6.19010.72.6.191
2810.72.6.192/2610.72.6.193 – 10.72.6.25410.72.6.255
2910.72.7.0/2610.72.7.1 – 10.72.7.6210.72.7.63
3010.72.7.64/2610.72.7.65 – 10.72.7.12610.72.7.127
3110.72.7.128/2610.72.7.129 – 10.72.7.19010.72.7.191
3210.72.7.192/2610.72.7.193 – 10.72.7.25410.72.7.255
3310.72.8.0/2610.72.8.1 – 10.72.8.6210.72.8.63
3410.72.8.64/2610.72.8.65 – 10.72.8.12610.72.8.127
3510.72.8.128/2610.72.8.129 – 10.72.8.19010.72.8.191
3610.72.8.192/2610.72.8.193 – 10.72.8.25410.72.8.255
3710.72.9.0/2610.72.9.1 – 10.72.9.6210.72.9.63
3810.72.9.64/2610.72.9.65 – 10.72.9.12610.72.9.127
3910.72.9.128/2610.72.9.129 – 10.72.9.19010.72.9.191
4010.72.9.192/2610.72.9.193 – 10.72.9.25410.72.9.255
4110.72.10.0/2610.72.10.1 – 10.72.10.6210.72.10.63
4210.72.10.64/2610.72.10.65 – 10.72.10.12610.72.10.127
4310.72.10.128/2610.72.10.129 – 10.72.10.19010.72.10.191
4410.72.10.192/2610.72.10.193 – 10.72.10.25410.72.10.255
4510.72.11.0/2610.72.11.1 – 10.72.11.6210.72.11.63
4610.72.11.64/2610.72.11.65 – 10.72.11.12610.72.11.127
4710.72.11.128/2610.72.11.129 – 10.72.11.19010.72.11.191
4810.72.11.192/2610.72.11.193 – 10.72.11.25410.72.11.255
4910.72.12.0/2610.72.12.1 – 10.72.12.6210.72.12.63
5010.72.12.64/2610.72.12.65 – 10.72.12.12610.72.12.127
5110.72.12.128/2610.72.12.129 – 10.72.12.19010.72.12.191
5210.72.12.192/2610.72.12.193 – 10.72.12.25410.72.12.255
5310.72.13.0/2610.72.13.1 – 10.72.13.6210.72.13.63
5410.72.13.64/2610.72.13.65 – 10.72.13.12610.72.13.127
5510.72.13.128/2610.72.13.129 – 10.72.13.19010.72.13.191
5610.72.13.192/2610.72.13.193 – 10.72.13.25410.72.13.255
5710.72.14.0/2610.72.14.1 – 10.72.14.6210.72.14.63
5810.72.14.64/2610.72.14.65 – 10.72.14.12610.72.14.127
5910.72.14.128/2610.72.14.129 – 10.72.14.19010.72.14.191
6010.72.14.192/2610.72.14.193 – 10.72.14.25410.72.14.255
6110.72.15.0/2610.72.15.1 – 10.72.15.6210.72.15.63
6210.72.15.64/2610.72.15.65 – 10.72.15.12610.72.15.127
6310.72.15.128/2610.72.15.129 – 10.72.15.19010.72.15.191
6410.72.15.192/2610.72.15.193 – 10.72.15.25410.72.15.255
6510.72.16.0/2610.72.16.1 – 10.72.16.6210.72.16.63
6610.72.16.64/2610.72.16.65 – 10.72.16.12610.72.16.127
6710.72.16.128/2610.72.16.129 – 10.72.16.19010.72.16.191
6810.72.16.192/2610.72.16.193 – 10.72.16.25410.72.16.255
6910.72.17.0/2610.72.17.1 – 10.72.17.6210.72.17.63
7010.72.17.64/2610.72.17.65 – 10.72.17.12610.72.17.127
7110.72.17.128/2610.72.17.129 – 10.72.17.19010.72.17.191
7210.72.17.192/2610.72.17.193 – 10.72.17.25410.72.17.255
7310.72.18.0/2610.72.18.1 – 10.72.18.6210.72.18.63
7410.72.18.64/2610.72.18.65 – 10.72.18.12610.72.18.127
7510.72.18.128/2610.72.18.129 – 10.72.18.19010.72.18.191
7610.72.18.192/2610.72.18.193 – 10.72.18.25410.72.18.255
7710.72.19.0/2610.72.19.1 – 10.72.19.6210.72.19.63
7810.72.19.64/2610.72.19.65 – 10.72.19.12610.72.19.127
7910.72.19.128/2610.72.19.129 – 10.72.19.19010.72.19.191
8010.72.19.192/2610.72.19.193 – 10.72.19.25410.72.19.255
8110.72.20.0/2610.72.20.1 – 10.72.20.6210.72.20.63
8210.72.20.64/2610.72.20.65 – 10.72.20.12610.72.20.127
8310.72.20.128/2610.72.20.129 – 10.72.20.19010.72.20.191
8410.72.20.192/2610.72.20.193 – 10.72.20.25410.72.20.255
8510.72.21.0/2610.72.21.1 – 10.72.21.6210.72.21.63
8610.72.21.64/2610.72.21.65 – 10.72.21.12610.72.21.127
8710.72.21.128/2610.72.21.129 – 10.72.21.19010.72.21.191
8810.72.21.192/2610.72.21.193 – 10.72.21.25410.72.21.255
8910.72.22.0/2610.72.22.1 – 10.72.22.6210.72.22.63
9010.72.22.64/2610.72.22.65 – 10.72.22.12610.72.22.127
9110.72.22.128/2610.72.22.129 – 10.72.22.19010.72.22.191
9210.72.22.192/2610.72.22.193 – 10.72.22.25410.72.22.255
9310.72.23.0/2610.72.23.1 – 10.72.23.6210.72.23.63
9410.72.23.64/2610.72.23.65 – 10.72.23.12610.72.23.127
9510.72.23.128/2610.72.23.129 – 10.72.23.19010.72.23.191
9610.72.23.192/2610.72.23.193 – 10.72.23.25410.72.23.255
9710.72.24.0/2610.72.24.1 – 10.72.24.6210.72.24.63
9810.72.24.64/2610.72.24.65 – 10.72.24.12610.72.24.127
9910.72.24.128/2610.72.24.129 – 10.72.24.19010.72.24.191
10010.72.24.192/2610.72.24.193 – 10.72.24.25410.72.24.255
10110.72.25.0/2610.72.25.1 – 10.72.25.6210.72.25.63
10210.72.25.64/2610.72.25.65 – 10.72.25.12610.72.25.127
10310.72.25.128/2610.72.25.129 – 10.72.25.19010.72.25.191
10410.72.25.192/2610.72.25.193 – 10.72.25.25410.72.25.255
10510.72.26.0/2610.72.26.1 – 10.72.26.6210.72.26.63
10610.72.26.64/2610.72.26.65 – 10.72.26.12610.72.26.127
10710.72.26.128/2610.72.26.129 – 10.72.26.19010.72.26.191
10810.72.26.192/2610.72.26.193 – 10.72.26.25410.72.26.255
10910.72.27.0/2610.72.27.1 – 10.72.27.6210.72.27.63
11010.72.27.64/2610.72.27.65 – 10.72.27.12610.72.27.127
11110.72.27.128/2610.72.27.129 – 10.72.27.19010.72.27.191
11210.72.27.192/2610.72.27.193 – 10.72.27.25410.72.27.255
11310.72.28.0/2610.72.28.1 – 10.72.28.6210.72.28.63
11410.72.28.64/2610.72.28.65 – 10.72.28.12610.72.28.127
11510.72.28.128/2610.72.28.129 – 10.72.28.19010.72.28.191
11610.72.28.192/2610.72.28.193 – 10.72.28.25410.72.28.255
11710.72.29.0/2610.72.29.1 – 10.72.29.6210.72.29.63
11810.72.29.64/2610.72.29.65 – 10.72.29.12610.72.29.127
11910.72.29.128/2610.72.29.129 – 10.72.29.19010.72.29.191
12010.72.29.192/2610.72.29.193 – 10.72.29.25410.72.29.255
12110.72.30.0/2610.72.30.1 – 10.72.30.6210.72.30.63
12210.72.30.64/2610.72.30.65 – 10.72.30.12610.72.30.127
12310.72.30.128/2610.72.30.129 – 10.72.30.19010.72.30.191
12410.72.30.192/2610.72.30.193 – 10.72.30.25410.72.30.255
12510.72.31.0/2610.72.31.1 – 10.72.31.6210.72.31.63
12610.72.31.64/2610.72.31.65 – 10.72.31.12610.72.31.127
12710.72.31.128/2610.72.31.129 – 10.72.31.19010.72.31.191
12810.72.31.192/2610.72.31.193 – 10.72.31.25410.72.31.255
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 →