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)10.40.32.0/19
network10.40.32.0/19
broadcast10.40.63.255
first host10.40.32.1
last host10.40.63.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.40.32.0/19
address00001010.00101000.00100000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00101000.00100000.00000000
broadcast00001010.00101000.00111111.11111111
green = network part, grey = host part
hex0x0a282000
decimal170401792
reverse dns0.32.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:2000

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.40.32.0/2610.40.32.1 – 10.40.32.6210.40.32.63
210.40.32.64/2610.40.32.65 – 10.40.32.12610.40.32.127
310.40.32.128/2610.40.32.129 – 10.40.32.19010.40.32.191
410.40.32.192/2610.40.32.193 – 10.40.32.25410.40.32.255
510.40.33.0/2610.40.33.1 – 10.40.33.6210.40.33.63
610.40.33.64/2610.40.33.65 – 10.40.33.12610.40.33.127
710.40.33.128/2610.40.33.129 – 10.40.33.19010.40.33.191
810.40.33.192/2610.40.33.193 – 10.40.33.25410.40.33.255
910.40.34.0/2610.40.34.1 – 10.40.34.6210.40.34.63
1010.40.34.64/2610.40.34.65 – 10.40.34.12610.40.34.127
1110.40.34.128/2610.40.34.129 – 10.40.34.19010.40.34.191
1210.40.34.192/2610.40.34.193 – 10.40.34.25410.40.34.255
1310.40.35.0/2610.40.35.1 – 10.40.35.6210.40.35.63
1410.40.35.64/2610.40.35.65 – 10.40.35.12610.40.35.127
1510.40.35.128/2610.40.35.129 – 10.40.35.19010.40.35.191
1610.40.35.192/2610.40.35.193 – 10.40.35.25410.40.35.255
1710.40.36.0/2610.40.36.1 – 10.40.36.6210.40.36.63
1810.40.36.64/2610.40.36.65 – 10.40.36.12610.40.36.127
1910.40.36.128/2610.40.36.129 – 10.40.36.19010.40.36.191
2010.40.36.192/2610.40.36.193 – 10.40.36.25410.40.36.255
2110.40.37.0/2610.40.37.1 – 10.40.37.6210.40.37.63
2210.40.37.64/2610.40.37.65 – 10.40.37.12610.40.37.127
2310.40.37.128/2610.40.37.129 – 10.40.37.19010.40.37.191
2410.40.37.192/2610.40.37.193 – 10.40.37.25410.40.37.255
2510.40.38.0/2610.40.38.1 – 10.40.38.6210.40.38.63
2610.40.38.64/2610.40.38.65 – 10.40.38.12610.40.38.127
2710.40.38.128/2610.40.38.129 – 10.40.38.19010.40.38.191
2810.40.38.192/2610.40.38.193 – 10.40.38.25410.40.38.255
2910.40.39.0/2610.40.39.1 – 10.40.39.6210.40.39.63
3010.40.39.64/2610.40.39.65 – 10.40.39.12610.40.39.127
3110.40.39.128/2610.40.39.129 – 10.40.39.19010.40.39.191
3210.40.39.192/2610.40.39.193 – 10.40.39.25410.40.39.255
3310.40.40.0/2610.40.40.1 – 10.40.40.6210.40.40.63
3410.40.40.64/2610.40.40.65 – 10.40.40.12610.40.40.127
3510.40.40.128/2610.40.40.129 – 10.40.40.19010.40.40.191
3610.40.40.192/2610.40.40.193 – 10.40.40.25410.40.40.255
3710.40.41.0/2610.40.41.1 – 10.40.41.6210.40.41.63
3810.40.41.64/2610.40.41.65 – 10.40.41.12610.40.41.127
3910.40.41.128/2610.40.41.129 – 10.40.41.19010.40.41.191
4010.40.41.192/2610.40.41.193 – 10.40.41.25410.40.41.255
4110.40.42.0/2610.40.42.1 – 10.40.42.6210.40.42.63
4210.40.42.64/2610.40.42.65 – 10.40.42.12610.40.42.127
4310.40.42.128/2610.40.42.129 – 10.40.42.19010.40.42.191
4410.40.42.192/2610.40.42.193 – 10.40.42.25410.40.42.255
4510.40.43.0/2610.40.43.1 – 10.40.43.6210.40.43.63
4610.40.43.64/2610.40.43.65 – 10.40.43.12610.40.43.127
4710.40.43.128/2610.40.43.129 – 10.40.43.19010.40.43.191
4810.40.43.192/2610.40.43.193 – 10.40.43.25410.40.43.255
4910.40.44.0/2610.40.44.1 – 10.40.44.6210.40.44.63
5010.40.44.64/2610.40.44.65 – 10.40.44.12610.40.44.127
5110.40.44.128/2610.40.44.129 – 10.40.44.19010.40.44.191
5210.40.44.192/2610.40.44.193 – 10.40.44.25410.40.44.255
5310.40.45.0/2610.40.45.1 – 10.40.45.6210.40.45.63
5410.40.45.64/2610.40.45.65 – 10.40.45.12610.40.45.127
5510.40.45.128/2610.40.45.129 – 10.40.45.19010.40.45.191
5610.40.45.192/2610.40.45.193 – 10.40.45.25410.40.45.255
5710.40.46.0/2610.40.46.1 – 10.40.46.6210.40.46.63
5810.40.46.64/2610.40.46.65 – 10.40.46.12610.40.46.127
5910.40.46.128/2610.40.46.129 – 10.40.46.19010.40.46.191
6010.40.46.192/2610.40.46.193 – 10.40.46.25410.40.46.255
6110.40.47.0/2610.40.47.1 – 10.40.47.6210.40.47.63
6210.40.47.64/2610.40.47.65 – 10.40.47.12610.40.47.127
6310.40.47.128/2610.40.47.129 – 10.40.47.19010.40.47.191
6410.40.47.192/2610.40.47.193 – 10.40.47.25410.40.47.255
6510.40.48.0/2610.40.48.1 – 10.40.48.6210.40.48.63
6610.40.48.64/2610.40.48.65 – 10.40.48.12610.40.48.127
6710.40.48.128/2610.40.48.129 – 10.40.48.19010.40.48.191
6810.40.48.192/2610.40.48.193 – 10.40.48.25410.40.48.255
6910.40.49.0/2610.40.49.1 – 10.40.49.6210.40.49.63
7010.40.49.64/2610.40.49.65 – 10.40.49.12610.40.49.127
7110.40.49.128/2610.40.49.129 – 10.40.49.19010.40.49.191
7210.40.49.192/2610.40.49.193 – 10.40.49.25410.40.49.255
7310.40.50.0/2610.40.50.1 – 10.40.50.6210.40.50.63
7410.40.50.64/2610.40.50.65 – 10.40.50.12610.40.50.127
7510.40.50.128/2610.40.50.129 – 10.40.50.19010.40.50.191
7610.40.50.192/2610.40.50.193 – 10.40.50.25410.40.50.255
7710.40.51.0/2610.40.51.1 – 10.40.51.6210.40.51.63
7810.40.51.64/2610.40.51.65 – 10.40.51.12610.40.51.127
7910.40.51.128/2610.40.51.129 – 10.40.51.19010.40.51.191
8010.40.51.192/2610.40.51.193 – 10.40.51.25410.40.51.255
8110.40.52.0/2610.40.52.1 – 10.40.52.6210.40.52.63
8210.40.52.64/2610.40.52.65 – 10.40.52.12610.40.52.127
8310.40.52.128/2610.40.52.129 – 10.40.52.19010.40.52.191
8410.40.52.192/2610.40.52.193 – 10.40.52.25410.40.52.255
8510.40.53.0/2610.40.53.1 – 10.40.53.6210.40.53.63
8610.40.53.64/2610.40.53.65 – 10.40.53.12610.40.53.127
8710.40.53.128/2610.40.53.129 – 10.40.53.19010.40.53.191
8810.40.53.192/2610.40.53.193 – 10.40.53.25410.40.53.255
8910.40.54.0/2610.40.54.1 – 10.40.54.6210.40.54.63
9010.40.54.64/2610.40.54.65 – 10.40.54.12610.40.54.127
9110.40.54.128/2610.40.54.129 – 10.40.54.19010.40.54.191
9210.40.54.192/2610.40.54.193 – 10.40.54.25410.40.54.255
9310.40.55.0/2610.40.55.1 – 10.40.55.6210.40.55.63
9410.40.55.64/2610.40.55.65 – 10.40.55.12610.40.55.127
9510.40.55.128/2610.40.55.129 – 10.40.55.19010.40.55.191
9610.40.55.192/2610.40.55.193 – 10.40.55.25410.40.55.255
9710.40.56.0/2610.40.56.1 – 10.40.56.6210.40.56.63
9810.40.56.64/2610.40.56.65 – 10.40.56.12610.40.56.127
9910.40.56.128/2610.40.56.129 – 10.40.56.19010.40.56.191
10010.40.56.192/2610.40.56.193 – 10.40.56.25410.40.56.255
10110.40.57.0/2610.40.57.1 – 10.40.57.6210.40.57.63
10210.40.57.64/2610.40.57.65 – 10.40.57.12610.40.57.127
10310.40.57.128/2610.40.57.129 – 10.40.57.19010.40.57.191
10410.40.57.192/2610.40.57.193 – 10.40.57.25410.40.57.255
10510.40.58.0/2610.40.58.1 – 10.40.58.6210.40.58.63
10610.40.58.64/2610.40.58.65 – 10.40.58.12610.40.58.127
10710.40.58.128/2610.40.58.129 – 10.40.58.19010.40.58.191
10810.40.58.192/2610.40.58.193 – 10.40.58.25410.40.58.255
10910.40.59.0/2610.40.59.1 – 10.40.59.6210.40.59.63
11010.40.59.64/2610.40.59.65 – 10.40.59.12610.40.59.127
11110.40.59.128/2610.40.59.129 – 10.40.59.19010.40.59.191
11210.40.59.192/2610.40.59.193 – 10.40.59.25410.40.59.255
11310.40.60.0/2610.40.60.1 – 10.40.60.6210.40.60.63
11410.40.60.64/2610.40.60.65 – 10.40.60.12610.40.60.127
11510.40.60.128/2610.40.60.129 – 10.40.60.19010.40.60.191
11610.40.60.192/2610.40.60.193 – 10.40.60.25410.40.60.255
11710.40.61.0/2610.40.61.1 – 10.40.61.6210.40.61.63
11810.40.61.64/2610.40.61.65 – 10.40.61.12610.40.61.127
11910.40.61.128/2610.40.61.129 – 10.40.61.19010.40.61.191
12010.40.61.192/2610.40.61.193 – 10.40.61.25410.40.61.255
12110.40.62.0/2610.40.62.1 – 10.40.62.6210.40.62.63
12210.40.62.64/2610.40.62.65 – 10.40.62.12610.40.62.127
12310.40.62.128/2610.40.62.129 – 10.40.62.19010.40.62.191
12410.40.62.192/2610.40.62.193 – 10.40.62.25410.40.62.255
12510.40.63.0/2610.40.63.1 – 10.40.63.6210.40.63.63
12610.40.63.64/2610.40.63.65 – 10.40.63.12610.40.63.127
12710.40.63.128/2610.40.63.129 – 10.40.63.19010.40.63.191
12810.40.63.192/2610.40.63.193 – 10.40.63.25410.40.63.255
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 →