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)10.19.0.0/19
network10.19.0.0/19
broadcast10.19.31.255
first host10.19.0.1
last host10.19.31.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.19.0.0/19
address00001010.00010011.00000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010011.00000000.00000000
broadcast00001010.00010011.00011111.11111111
green = network part, grey = host part
hex0x0a130000
decimal169017344
reverse dns0.0.19.10.in-addr.arpa
ipv4-mapped::ffff:a13:0

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.19.0.0/2610.19.0.1 – 10.19.0.6210.19.0.63
210.19.0.64/2610.19.0.65 – 10.19.0.12610.19.0.127
310.19.0.128/2610.19.0.129 – 10.19.0.19010.19.0.191
410.19.0.192/2610.19.0.193 – 10.19.0.25410.19.0.255
510.19.1.0/2610.19.1.1 – 10.19.1.6210.19.1.63
610.19.1.64/2610.19.1.65 – 10.19.1.12610.19.1.127
710.19.1.128/2610.19.1.129 – 10.19.1.19010.19.1.191
810.19.1.192/2610.19.1.193 – 10.19.1.25410.19.1.255
910.19.2.0/2610.19.2.1 – 10.19.2.6210.19.2.63
1010.19.2.64/2610.19.2.65 – 10.19.2.12610.19.2.127
1110.19.2.128/2610.19.2.129 – 10.19.2.19010.19.2.191
1210.19.2.192/2610.19.2.193 – 10.19.2.25410.19.2.255
1310.19.3.0/2610.19.3.1 – 10.19.3.6210.19.3.63
1410.19.3.64/2610.19.3.65 – 10.19.3.12610.19.3.127
1510.19.3.128/2610.19.3.129 – 10.19.3.19010.19.3.191
1610.19.3.192/2610.19.3.193 – 10.19.3.25410.19.3.255
1710.19.4.0/2610.19.4.1 – 10.19.4.6210.19.4.63
1810.19.4.64/2610.19.4.65 – 10.19.4.12610.19.4.127
1910.19.4.128/2610.19.4.129 – 10.19.4.19010.19.4.191
2010.19.4.192/2610.19.4.193 – 10.19.4.25410.19.4.255
2110.19.5.0/2610.19.5.1 – 10.19.5.6210.19.5.63
2210.19.5.64/2610.19.5.65 – 10.19.5.12610.19.5.127
2310.19.5.128/2610.19.5.129 – 10.19.5.19010.19.5.191
2410.19.5.192/2610.19.5.193 – 10.19.5.25410.19.5.255
2510.19.6.0/2610.19.6.1 – 10.19.6.6210.19.6.63
2610.19.6.64/2610.19.6.65 – 10.19.6.12610.19.6.127
2710.19.6.128/2610.19.6.129 – 10.19.6.19010.19.6.191
2810.19.6.192/2610.19.6.193 – 10.19.6.25410.19.6.255
2910.19.7.0/2610.19.7.1 – 10.19.7.6210.19.7.63
3010.19.7.64/2610.19.7.65 – 10.19.7.12610.19.7.127
3110.19.7.128/2610.19.7.129 – 10.19.7.19010.19.7.191
3210.19.7.192/2610.19.7.193 – 10.19.7.25410.19.7.255
3310.19.8.0/2610.19.8.1 – 10.19.8.6210.19.8.63
3410.19.8.64/2610.19.8.65 – 10.19.8.12610.19.8.127
3510.19.8.128/2610.19.8.129 – 10.19.8.19010.19.8.191
3610.19.8.192/2610.19.8.193 – 10.19.8.25410.19.8.255
3710.19.9.0/2610.19.9.1 – 10.19.9.6210.19.9.63
3810.19.9.64/2610.19.9.65 – 10.19.9.12610.19.9.127
3910.19.9.128/2610.19.9.129 – 10.19.9.19010.19.9.191
4010.19.9.192/2610.19.9.193 – 10.19.9.25410.19.9.255
4110.19.10.0/2610.19.10.1 – 10.19.10.6210.19.10.63
4210.19.10.64/2610.19.10.65 – 10.19.10.12610.19.10.127
4310.19.10.128/2610.19.10.129 – 10.19.10.19010.19.10.191
4410.19.10.192/2610.19.10.193 – 10.19.10.25410.19.10.255
4510.19.11.0/2610.19.11.1 – 10.19.11.6210.19.11.63
4610.19.11.64/2610.19.11.65 – 10.19.11.12610.19.11.127
4710.19.11.128/2610.19.11.129 – 10.19.11.19010.19.11.191
4810.19.11.192/2610.19.11.193 – 10.19.11.25410.19.11.255
4910.19.12.0/2610.19.12.1 – 10.19.12.6210.19.12.63
5010.19.12.64/2610.19.12.65 – 10.19.12.12610.19.12.127
5110.19.12.128/2610.19.12.129 – 10.19.12.19010.19.12.191
5210.19.12.192/2610.19.12.193 – 10.19.12.25410.19.12.255
5310.19.13.0/2610.19.13.1 – 10.19.13.6210.19.13.63
5410.19.13.64/2610.19.13.65 – 10.19.13.12610.19.13.127
5510.19.13.128/2610.19.13.129 – 10.19.13.19010.19.13.191
5610.19.13.192/2610.19.13.193 – 10.19.13.25410.19.13.255
5710.19.14.0/2610.19.14.1 – 10.19.14.6210.19.14.63
5810.19.14.64/2610.19.14.65 – 10.19.14.12610.19.14.127
5910.19.14.128/2610.19.14.129 – 10.19.14.19010.19.14.191
6010.19.14.192/2610.19.14.193 – 10.19.14.25410.19.14.255
6110.19.15.0/2610.19.15.1 – 10.19.15.6210.19.15.63
6210.19.15.64/2610.19.15.65 – 10.19.15.12610.19.15.127
6310.19.15.128/2610.19.15.129 – 10.19.15.19010.19.15.191
6410.19.15.192/2610.19.15.193 – 10.19.15.25410.19.15.255
6510.19.16.0/2610.19.16.1 – 10.19.16.6210.19.16.63
6610.19.16.64/2610.19.16.65 – 10.19.16.12610.19.16.127
6710.19.16.128/2610.19.16.129 – 10.19.16.19010.19.16.191
6810.19.16.192/2610.19.16.193 – 10.19.16.25410.19.16.255
6910.19.17.0/2610.19.17.1 – 10.19.17.6210.19.17.63
7010.19.17.64/2610.19.17.65 – 10.19.17.12610.19.17.127
7110.19.17.128/2610.19.17.129 – 10.19.17.19010.19.17.191
7210.19.17.192/2610.19.17.193 – 10.19.17.25410.19.17.255
7310.19.18.0/2610.19.18.1 – 10.19.18.6210.19.18.63
7410.19.18.64/2610.19.18.65 – 10.19.18.12610.19.18.127
7510.19.18.128/2610.19.18.129 – 10.19.18.19010.19.18.191
7610.19.18.192/2610.19.18.193 – 10.19.18.25410.19.18.255
7710.19.19.0/2610.19.19.1 – 10.19.19.6210.19.19.63
7810.19.19.64/2610.19.19.65 – 10.19.19.12610.19.19.127
7910.19.19.128/2610.19.19.129 – 10.19.19.19010.19.19.191
8010.19.19.192/2610.19.19.193 – 10.19.19.25410.19.19.255
8110.19.20.0/2610.19.20.1 – 10.19.20.6210.19.20.63
8210.19.20.64/2610.19.20.65 – 10.19.20.12610.19.20.127
8310.19.20.128/2610.19.20.129 – 10.19.20.19010.19.20.191
8410.19.20.192/2610.19.20.193 – 10.19.20.25410.19.20.255
8510.19.21.0/2610.19.21.1 – 10.19.21.6210.19.21.63
8610.19.21.64/2610.19.21.65 – 10.19.21.12610.19.21.127
8710.19.21.128/2610.19.21.129 – 10.19.21.19010.19.21.191
8810.19.21.192/2610.19.21.193 – 10.19.21.25410.19.21.255
8910.19.22.0/2610.19.22.1 – 10.19.22.6210.19.22.63
9010.19.22.64/2610.19.22.65 – 10.19.22.12610.19.22.127
9110.19.22.128/2610.19.22.129 – 10.19.22.19010.19.22.191
9210.19.22.192/2610.19.22.193 – 10.19.22.25410.19.22.255
9310.19.23.0/2610.19.23.1 – 10.19.23.6210.19.23.63
9410.19.23.64/2610.19.23.65 – 10.19.23.12610.19.23.127
9510.19.23.128/2610.19.23.129 – 10.19.23.19010.19.23.191
9610.19.23.192/2610.19.23.193 – 10.19.23.25410.19.23.255
9710.19.24.0/2610.19.24.1 – 10.19.24.6210.19.24.63
9810.19.24.64/2610.19.24.65 – 10.19.24.12610.19.24.127
9910.19.24.128/2610.19.24.129 – 10.19.24.19010.19.24.191
10010.19.24.192/2610.19.24.193 – 10.19.24.25410.19.24.255
10110.19.25.0/2610.19.25.1 – 10.19.25.6210.19.25.63
10210.19.25.64/2610.19.25.65 – 10.19.25.12610.19.25.127
10310.19.25.128/2610.19.25.129 – 10.19.25.19010.19.25.191
10410.19.25.192/2610.19.25.193 – 10.19.25.25410.19.25.255
10510.19.26.0/2610.19.26.1 – 10.19.26.6210.19.26.63
10610.19.26.64/2610.19.26.65 – 10.19.26.12610.19.26.127
10710.19.26.128/2610.19.26.129 – 10.19.26.19010.19.26.191
10810.19.26.192/2610.19.26.193 – 10.19.26.25410.19.26.255
10910.19.27.0/2610.19.27.1 – 10.19.27.6210.19.27.63
11010.19.27.64/2610.19.27.65 – 10.19.27.12610.19.27.127
11110.19.27.128/2610.19.27.129 – 10.19.27.19010.19.27.191
11210.19.27.192/2610.19.27.193 – 10.19.27.25410.19.27.255
11310.19.28.0/2610.19.28.1 – 10.19.28.6210.19.28.63
11410.19.28.64/2610.19.28.65 – 10.19.28.12610.19.28.127
11510.19.28.128/2610.19.28.129 – 10.19.28.19010.19.28.191
11610.19.28.192/2610.19.28.193 – 10.19.28.25410.19.28.255
11710.19.29.0/2610.19.29.1 – 10.19.29.6210.19.29.63
11810.19.29.64/2610.19.29.65 – 10.19.29.12610.19.29.127
11910.19.29.128/2610.19.29.129 – 10.19.29.19010.19.29.191
12010.19.29.192/2610.19.29.193 – 10.19.29.25410.19.29.255
12110.19.30.0/2610.19.30.1 – 10.19.30.6210.19.30.63
12210.19.30.64/2610.19.30.65 – 10.19.30.12610.19.30.127
12310.19.30.128/2610.19.30.129 – 10.19.30.19010.19.30.191
12410.19.30.192/2610.19.30.193 – 10.19.30.25410.19.30.255
12510.19.31.0/2610.19.31.1 – 10.19.31.6210.19.31.63
12610.19.31.64/2610.19.31.65 – 10.19.31.12610.19.31.127
12710.19.31.128/2610.19.31.129 – 10.19.31.19010.19.31.191
12810.19.31.192/2610.19.31.193 – 10.19.31.25410.19.31.255
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 →