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)10.20.0.0/19
network10.20.0.0/19
broadcast10.20.31.255
first host10.20.0.1
last host10.20.31.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.20.0.0/19
address00001010.00010100.00000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010100.00000000.00000000
broadcast00001010.00010100.00011111.11111111
green = network part, grey = host part
hex0x0a140000
decimal169082880
reverse dns0.0.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:0

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.20.0.0/2610.20.0.1 – 10.20.0.6210.20.0.63
210.20.0.64/2610.20.0.65 – 10.20.0.12610.20.0.127
310.20.0.128/2610.20.0.129 – 10.20.0.19010.20.0.191
410.20.0.192/2610.20.0.193 – 10.20.0.25410.20.0.255
510.20.1.0/2610.20.1.1 – 10.20.1.6210.20.1.63
610.20.1.64/2610.20.1.65 – 10.20.1.12610.20.1.127
710.20.1.128/2610.20.1.129 – 10.20.1.19010.20.1.191
810.20.1.192/2610.20.1.193 – 10.20.1.25410.20.1.255
910.20.2.0/2610.20.2.1 – 10.20.2.6210.20.2.63
1010.20.2.64/2610.20.2.65 – 10.20.2.12610.20.2.127
1110.20.2.128/2610.20.2.129 – 10.20.2.19010.20.2.191
1210.20.2.192/2610.20.2.193 – 10.20.2.25410.20.2.255
1310.20.3.0/2610.20.3.1 – 10.20.3.6210.20.3.63
1410.20.3.64/2610.20.3.65 – 10.20.3.12610.20.3.127
1510.20.3.128/2610.20.3.129 – 10.20.3.19010.20.3.191
1610.20.3.192/2610.20.3.193 – 10.20.3.25410.20.3.255
1710.20.4.0/2610.20.4.1 – 10.20.4.6210.20.4.63
1810.20.4.64/2610.20.4.65 – 10.20.4.12610.20.4.127
1910.20.4.128/2610.20.4.129 – 10.20.4.19010.20.4.191
2010.20.4.192/2610.20.4.193 – 10.20.4.25410.20.4.255
2110.20.5.0/2610.20.5.1 – 10.20.5.6210.20.5.63
2210.20.5.64/2610.20.5.65 – 10.20.5.12610.20.5.127
2310.20.5.128/2610.20.5.129 – 10.20.5.19010.20.5.191
2410.20.5.192/2610.20.5.193 – 10.20.5.25410.20.5.255
2510.20.6.0/2610.20.6.1 – 10.20.6.6210.20.6.63
2610.20.6.64/2610.20.6.65 – 10.20.6.12610.20.6.127
2710.20.6.128/2610.20.6.129 – 10.20.6.19010.20.6.191
2810.20.6.192/2610.20.6.193 – 10.20.6.25410.20.6.255
2910.20.7.0/2610.20.7.1 – 10.20.7.6210.20.7.63
3010.20.7.64/2610.20.7.65 – 10.20.7.12610.20.7.127
3110.20.7.128/2610.20.7.129 – 10.20.7.19010.20.7.191
3210.20.7.192/2610.20.7.193 – 10.20.7.25410.20.7.255
3310.20.8.0/2610.20.8.1 – 10.20.8.6210.20.8.63
3410.20.8.64/2610.20.8.65 – 10.20.8.12610.20.8.127
3510.20.8.128/2610.20.8.129 – 10.20.8.19010.20.8.191
3610.20.8.192/2610.20.8.193 – 10.20.8.25410.20.8.255
3710.20.9.0/2610.20.9.1 – 10.20.9.6210.20.9.63
3810.20.9.64/2610.20.9.65 – 10.20.9.12610.20.9.127
3910.20.9.128/2610.20.9.129 – 10.20.9.19010.20.9.191
4010.20.9.192/2610.20.9.193 – 10.20.9.25410.20.9.255
4110.20.10.0/2610.20.10.1 – 10.20.10.6210.20.10.63
4210.20.10.64/2610.20.10.65 – 10.20.10.12610.20.10.127
4310.20.10.128/2610.20.10.129 – 10.20.10.19010.20.10.191
4410.20.10.192/2610.20.10.193 – 10.20.10.25410.20.10.255
4510.20.11.0/2610.20.11.1 – 10.20.11.6210.20.11.63
4610.20.11.64/2610.20.11.65 – 10.20.11.12610.20.11.127
4710.20.11.128/2610.20.11.129 – 10.20.11.19010.20.11.191
4810.20.11.192/2610.20.11.193 – 10.20.11.25410.20.11.255
4910.20.12.0/2610.20.12.1 – 10.20.12.6210.20.12.63
5010.20.12.64/2610.20.12.65 – 10.20.12.12610.20.12.127
5110.20.12.128/2610.20.12.129 – 10.20.12.19010.20.12.191
5210.20.12.192/2610.20.12.193 – 10.20.12.25410.20.12.255
5310.20.13.0/2610.20.13.1 – 10.20.13.6210.20.13.63
5410.20.13.64/2610.20.13.65 – 10.20.13.12610.20.13.127
5510.20.13.128/2610.20.13.129 – 10.20.13.19010.20.13.191
5610.20.13.192/2610.20.13.193 – 10.20.13.25410.20.13.255
5710.20.14.0/2610.20.14.1 – 10.20.14.6210.20.14.63
5810.20.14.64/2610.20.14.65 – 10.20.14.12610.20.14.127
5910.20.14.128/2610.20.14.129 – 10.20.14.19010.20.14.191
6010.20.14.192/2610.20.14.193 – 10.20.14.25410.20.14.255
6110.20.15.0/2610.20.15.1 – 10.20.15.6210.20.15.63
6210.20.15.64/2610.20.15.65 – 10.20.15.12610.20.15.127
6310.20.15.128/2610.20.15.129 – 10.20.15.19010.20.15.191
6410.20.15.192/2610.20.15.193 – 10.20.15.25410.20.15.255
6510.20.16.0/2610.20.16.1 – 10.20.16.6210.20.16.63
6610.20.16.64/2610.20.16.65 – 10.20.16.12610.20.16.127
6710.20.16.128/2610.20.16.129 – 10.20.16.19010.20.16.191
6810.20.16.192/2610.20.16.193 – 10.20.16.25410.20.16.255
6910.20.17.0/2610.20.17.1 – 10.20.17.6210.20.17.63
7010.20.17.64/2610.20.17.65 – 10.20.17.12610.20.17.127
7110.20.17.128/2610.20.17.129 – 10.20.17.19010.20.17.191
7210.20.17.192/2610.20.17.193 – 10.20.17.25410.20.17.255
7310.20.18.0/2610.20.18.1 – 10.20.18.6210.20.18.63
7410.20.18.64/2610.20.18.65 – 10.20.18.12610.20.18.127
7510.20.18.128/2610.20.18.129 – 10.20.18.19010.20.18.191
7610.20.18.192/2610.20.18.193 – 10.20.18.25410.20.18.255
7710.20.19.0/2610.20.19.1 – 10.20.19.6210.20.19.63
7810.20.19.64/2610.20.19.65 – 10.20.19.12610.20.19.127
7910.20.19.128/2610.20.19.129 – 10.20.19.19010.20.19.191
8010.20.19.192/2610.20.19.193 – 10.20.19.25410.20.19.255
8110.20.20.0/2610.20.20.1 – 10.20.20.6210.20.20.63
8210.20.20.64/2610.20.20.65 – 10.20.20.12610.20.20.127
8310.20.20.128/2610.20.20.129 – 10.20.20.19010.20.20.191
8410.20.20.192/2610.20.20.193 – 10.20.20.25410.20.20.255
8510.20.21.0/2610.20.21.1 – 10.20.21.6210.20.21.63
8610.20.21.64/2610.20.21.65 – 10.20.21.12610.20.21.127
8710.20.21.128/2610.20.21.129 – 10.20.21.19010.20.21.191
8810.20.21.192/2610.20.21.193 – 10.20.21.25410.20.21.255
8910.20.22.0/2610.20.22.1 – 10.20.22.6210.20.22.63
9010.20.22.64/2610.20.22.65 – 10.20.22.12610.20.22.127
9110.20.22.128/2610.20.22.129 – 10.20.22.19010.20.22.191
9210.20.22.192/2610.20.22.193 – 10.20.22.25410.20.22.255
9310.20.23.0/2610.20.23.1 – 10.20.23.6210.20.23.63
9410.20.23.64/2610.20.23.65 – 10.20.23.12610.20.23.127
9510.20.23.128/2610.20.23.129 – 10.20.23.19010.20.23.191
9610.20.23.192/2610.20.23.193 – 10.20.23.25410.20.23.255
9710.20.24.0/2610.20.24.1 – 10.20.24.6210.20.24.63
9810.20.24.64/2610.20.24.65 – 10.20.24.12610.20.24.127
9910.20.24.128/2610.20.24.129 – 10.20.24.19010.20.24.191
10010.20.24.192/2610.20.24.193 – 10.20.24.25410.20.24.255
10110.20.25.0/2610.20.25.1 – 10.20.25.6210.20.25.63
10210.20.25.64/2610.20.25.65 – 10.20.25.12610.20.25.127
10310.20.25.128/2610.20.25.129 – 10.20.25.19010.20.25.191
10410.20.25.192/2610.20.25.193 – 10.20.25.25410.20.25.255
10510.20.26.0/2610.20.26.1 – 10.20.26.6210.20.26.63
10610.20.26.64/2610.20.26.65 – 10.20.26.12610.20.26.127
10710.20.26.128/2610.20.26.129 – 10.20.26.19010.20.26.191
10810.20.26.192/2610.20.26.193 – 10.20.26.25410.20.26.255
10910.20.27.0/2610.20.27.1 – 10.20.27.6210.20.27.63
11010.20.27.64/2610.20.27.65 – 10.20.27.12610.20.27.127
11110.20.27.128/2610.20.27.129 – 10.20.27.19010.20.27.191
11210.20.27.192/2610.20.27.193 – 10.20.27.25410.20.27.255
11310.20.28.0/2610.20.28.1 – 10.20.28.6210.20.28.63
11410.20.28.64/2610.20.28.65 – 10.20.28.12610.20.28.127
11510.20.28.128/2610.20.28.129 – 10.20.28.19010.20.28.191
11610.20.28.192/2610.20.28.193 – 10.20.28.25410.20.28.255
11710.20.29.0/2610.20.29.1 – 10.20.29.6210.20.29.63
11810.20.29.64/2610.20.29.65 – 10.20.29.12610.20.29.127
11910.20.29.128/2610.20.29.129 – 10.20.29.19010.20.29.191
12010.20.29.192/2610.20.29.193 – 10.20.29.25410.20.29.255
12110.20.30.0/2610.20.30.1 – 10.20.30.6210.20.30.63
12210.20.30.64/2610.20.30.65 – 10.20.30.12610.20.30.127
12310.20.30.128/2610.20.30.129 – 10.20.30.19010.20.30.191
12410.20.30.192/2610.20.30.193 – 10.20.30.25410.20.30.255
12510.20.31.0/2610.20.31.1 – 10.20.31.6210.20.31.63
12610.20.31.64/2610.20.31.65 – 10.20.31.12610.20.31.127
12710.20.31.128/2610.20.31.129 – 10.20.31.19010.20.31.191
12810.20.31.192/2610.20.31.193 – 10.20.31.25410.20.31.255
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 →