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)10.78.0.0/18
network10.78.0.0/18
broadcast10.78.63.255
first host10.78.0.1
last host10.78.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.78.0.0/18
address00001010.01001110.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.01001110.00000000.00000000
broadcast00001010.01001110.00111111.11111111
green = network part, grey = host part
hex0x0a4e0000
decimal172883968
reverse dns0.0.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.0.0/2510.78.0.1 – 10.78.0.12610.78.0.127
210.78.0.128/2510.78.0.129 – 10.78.0.25410.78.0.255
310.78.1.0/2510.78.1.1 – 10.78.1.12610.78.1.127
410.78.1.128/2510.78.1.129 – 10.78.1.25410.78.1.255
510.78.2.0/2510.78.2.1 – 10.78.2.12610.78.2.127
610.78.2.128/2510.78.2.129 – 10.78.2.25410.78.2.255
710.78.3.0/2510.78.3.1 – 10.78.3.12610.78.3.127
810.78.3.128/2510.78.3.129 – 10.78.3.25410.78.3.255
910.78.4.0/2510.78.4.1 – 10.78.4.12610.78.4.127
1010.78.4.128/2510.78.4.129 – 10.78.4.25410.78.4.255
1110.78.5.0/2510.78.5.1 – 10.78.5.12610.78.5.127
1210.78.5.128/2510.78.5.129 – 10.78.5.25410.78.5.255
1310.78.6.0/2510.78.6.1 – 10.78.6.12610.78.6.127
1410.78.6.128/2510.78.6.129 – 10.78.6.25410.78.6.255
1510.78.7.0/2510.78.7.1 – 10.78.7.12610.78.7.127
1610.78.7.128/2510.78.7.129 – 10.78.7.25410.78.7.255
1710.78.8.0/2510.78.8.1 – 10.78.8.12610.78.8.127
1810.78.8.128/2510.78.8.129 – 10.78.8.25410.78.8.255
1910.78.9.0/2510.78.9.1 – 10.78.9.12610.78.9.127
2010.78.9.128/2510.78.9.129 – 10.78.9.25410.78.9.255
2110.78.10.0/2510.78.10.1 – 10.78.10.12610.78.10.127
2210.78.10.128/2510.78.10.129 – 10.78.10.25410.78.10.255
2310.78.11.0/2510.78.11.1 – 10.78.11.12610.78.11.127
2410.78.11.128/2510.78.11.129 – 10.78.11.25410.78.11.255
2510.78.12.0/2510.78.12.1 – 10.78.12.12610.78.12.127
2610.78.12.128/2510.78.12.129 – 10.78.12.25410.78.12.255
2710.78.13.0/2510.78.13.1 – 10.78.13.12610.78.13.127
2810.78.13.128/2510.78.13.129 – 10.78.13.25410.78.13.255
2910.78.14.0/2510.78.14.1 – 10.78.14.12610.78.14.127
3010.78.14.128/2510.78.14.129 – 10.78.14.25410.78.14.255
3110.78.15.0/2510.78.15.1 – 10.78.15.12610.78.15.127
3210.78.15.128/2510.78.15.129 – 10.78.15.25410.78.15.255
3310.78.16.0/2510.78.16.1 – 10.78.16.12610.78.16.127
3410.78.16.128/2510.78.16.129 – 10.78.16.25410.78.16.255
3510.78.17.0/2510.78.17.1 – 10.78.17.12610.78.17.127
3610.78.17.128/2510.78.17.129 – 10.78.17.25410.78.17.255
3710.78.18.0/2510.78.18.1 – 10.78.18.12610.78.18.127
3810.78.18.128/2510.78.18.129 – 10.78.18.25410.78.18.255
3910.78.19.0/2510.78.19.1 – 10.78.19.12610.78.19.127
4010.78.19.128/2510.78.19.129 – 10.78.19.25410.78.19.255
4110.78.20.0/2510.78.20.1 – 10.78.20.12610.78.20.127
4210.78.20.128/2510.78.20.129 – 10.78.20.25410.78.20.255
4310.78.21.0/2510.78.21.1 – 10.78.21.12610.78.21.127
4410.78.21.128/2510.78.21.129 – 10.78.21.25410.78.21.255
4510.78.22.0/2510.78.22.1 – 10.78.22.12610.78.22.127
4610.78.22.128/2510.78.22.129 – 10.78.22.25410.78.22.255
4710.78.23.0/2510.78.23.1 – 10.78.23.12610.78.23.127
4810.78.23.128/2510.78.23.129 – 10.78.23.25410.78.23.255
4910.78.24.0/2510.78.24.1 – 10.78.24.12610.78.24.127
5010.78.24.128/2510.78.24.129 – 10.78.24.25410.78.24.255
5110.78.25.0/2510.78.25.1 – 10.78.25.12610.78.25.127
5210.78.25.128/2510.78.25.129 – 10.78.25.25410.78.25.255
5310.78.26.0/2510.78.26.1 – 10.78.26.12610.78.26.127
5410.78.26.128/2510.78.26.129 – 10.78.26.25410.78.26.255
5510.78.27.0/2510.78.27.1 – 10.78.27.12610.78.27.127
5610.78.27.128/2510.78.27.129 – 10.78.27.25410.78.27.255
5710.78.28.0/2510.78.28.1 – 10.78.28.12610.78.28.127
5810.78.28.128/2510.78.28.129 – 10.78.28.25410.78.28.255
5910.78.29.0/2510.78.29.1 – 10.78.29.12610.78.29.127
6010.78.29.128/2510.78.29.129 – 10.78.29.25410.78.29.255
6110.78.30.0/2510.78.30.1 – 10.78.30.12610.78.30.127
6210.78.30.128/2510.78.30.129 – 10.78.30.25410.78.30.255
6310.78.31.0/2510.78.31.1 – 10.78.31.12610.78.31.127
6410.78.31.128/2510.78.31.129 – 10.78.31.25410.78.31.255
6510.78.32.0/2510.78.32.1 – 10.78.32.12610.78.32.127
6610.78.32.128/2510.78.32.129 – 10.78.32.25410.78.32.255
6710.78.33.0/2510.78.33.1 – 10.78.33.12610.78.33.127
6810.78.33.128/2510.78.33.129 – 10.78.33.25410.78.33.255
6910.78.34.0/2510.78.34.1 – 10.78.34.12610.78.34.127
7010.78.34.128/2510.78.34.129 – 10.78.34.25410.78.34.255
7110.78.35.0/2510.78.35.1 – 10.78.35.12610.78.35.127
7210.78.35.128/2510.78.35.129 – 10.78.35.25410.78.35.255
7310.78.36.0/2510.78.36.1 – 10.78.36.12610.78.36.127
7410.78.36.128/2510.78.36.129 – 10.78.36.25410.78.36.255
7510.78.37.0/2510.78.37.1 – 10.78.37.12610.78.37.127
7610.78.37.128/2510.78.37.129 – 10.78.37.25410.78.37.255
7710.78.38.0/2510.78.38.1 – 10.78.38.12610.78.38.127
7810.78.38.128/2510.78.38.129 – 10.78.38.25410.78.38.255
7910.78.39.0/2510.78.39.1 – 10.78.39.12610.78.39.127
8010.78.39.128/2510.78.39.129 – 10.78.39.25410.78.39.255
8110.78.40.0/2510.78.40.1 – 10.78.40.12610.78.40.127
8210.78.40.128/2510.78.40.129 – 10.78.40.25410.78.40.255
8310.78.41.0/2510.78.41.1 – 10.78.41.12610.78.41.127
8410.78.41.128/2510.78.41.129 – 10.78.41.25410.78.41.255
8510.78.42.0/2510.78.42.1 – 10.78.42.12610.78.42.127
8610.78.42.128/2510.78.42.129 – 10.78.42.25410.78.42.255
8710.78.43.0/2510.78.43.1 – 10.78.43.12610.78.43.127
8810.78.43.128/2510.78.43.129 – 10.78.43.25410.78.43.255
8910.78.44.0/2510.78.44.1 – 10.78.44.12610.78.44.127
9010.78.44.128/2510.78.44.129 – 10.78.44.25410.78.44.255
9110.78.45.0/2510.78.45.1 – 10.78.45.12610.78.45.127
9210.78.45.128/2510.78.45.129 – 10.78.45.25410.78.45.255
9310.78.46.0/2510.78.46.1 – 10.78.46.12610.78.46.127
9410.78.46.128/2510.78.46.129 – 10.78.46.25410.78.46.255
9510.78.47.0/2510.78.47.1 – 10.78.47.12610.78.47.127
9610.78.47.128/2510.78.47.129 – 10.78.47.25410.78.47.255
9710.78.48.0/2510.78.48.1 – 10.78.48.12610.78.48.127
9810.78.48.128/2510.78.48.129 – 10.78.48.25410.78.48.255
9910.78.49.0/2510.78.49.1 – 10.78.49.12610.78.49.127
10010.78.49.128/2510.78.49.129 – 10.78.49.25410.78.49.255
10110.78.50.0/2510.78.50.1 – 10.78.50.12610.78.50.127
10210.78.50.128/2510.78.50.129 – 10.78.50.25410.78.50.255
10310.78.51.0/2510.78.51.1 – 10.78.51.12610.78.51.127
10410.78.51.128/2510.78.51.129 – 10.78.51.25410.78.51.255
10510.78.52.0/2510.78.52.1 – 10.78.52.12610.78.52.127
10610.78.52.128/2510.78.52.129 – 10.78.52.25410.78.52.255
10710.78.53.0/2510.78.53.1 – 10.78.53.12610.78.53.127
10810.78.53.128/2510.78.53.129 – 10.78.53.25410.78.53.255
10910.78.54.0/2510.78.54.1 – 10.78.54.12610.78.54.127
11010.78.54.128/2510.78.54.129 – 10.78.54.25410.78.54.255
11110.78.55.0/2510.78.55.1 – 10.78.55.12610.78.55.127
11210.78.55.128/2510.78.55.129 – 10.78.55.25410.78.55.255
11310.78.56.0/2510.78.56.1 – 10.78.56.12610.78.56.127
11410.78.56.128/2510.78.56.129 – 10.78.56.25410.78.56.255
11510.78.57.0/2510.78.57.1 – 10.78.57.12610.78.57.127
11610.78.57.128/2510.78.57.129 – 10.78.57.25410.78.57.255
11710.78.58.0/2510.78.58.1 – 10.78.58.12610.78.58.127
11810.78.58.128/2510.78.58.129 – 10.78.58.25410.78.58.255
11910.78.59.0/2510.78.59.1 – 10.78.59.12610.78.59.127
12010.78.59.128/2510.78.59.129 – 10.78.59.25410.78.59.255
12110.78.60.0/2510.78.60.1 – 10.78.60.12610.78.60.127
12210.78.60.128/2510.78.60.129 – 10.78.60.25410.78.60.255
12310.78.61.0/2510.78.61.1 – 10.78.61.12610.78.61.127
12410.78.61.128/2510.78.61.129 – 10.78.61.25410.78.61.255
12510.78.62.0/2510.78.62.1 – 10.78.62.12610.78.62.127
12610.78.62.128/2510.78.62.129 – 10.78.62.25410.78.62.255
12710.78.63.0/2510.78.63.1 – 10.78.63.12610.78.63.127
12810.78.63.128/2510.78.63.129 – 10.78.63.25410.78.63.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /18
/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-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →