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)10.68.0.0/18
network10.68.0.0/18
broadcast10.68.63.255
first host10.68.0.1
last host10.68.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.68.0.0/18
address00001010.01000100.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.01000100.00000000.00000000
broadcast00001010.01000100.00111111.11111111
green = network part, grey = host part
hex0x0a440000
decimal172228608
reverse dns0.0.68.10.in-addr.arpa
ipv4-mapped::ffff:a44:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.68.0.0/2510.68.0.1 – 10.68.0.12610.68.0.127
210.68.0.128/2510.68.0.129 – 10.68.0.25410.68.0.255
310.68.1.0/2510.68.1.1 – 10.68.1.12610.68.1.127
410.68.1.128/2510.68.1.129 – 10.68.1.25410.68.1.255
510.68.2.0/2510.68.2.1 – 10.68.2.12610.68.2.127
610.68.2.128/2510.68.2.129 – 10.68.2.25410.68.2.255
710.68.3.0/2510.68.3.1 – 10.68.3.12610.68.3.127
810.68.3.128/2510.68.3.129 – 10.68.3.25410.68.3.255
910.68.4.0/2510.68.4.1 – 10.68.4.12610.68.4.127
1010.68.4.128/2510.68.4.129 – 10.68.4.25410.68.4.255
1110.68.5.0/2510.68.5.1 – 10.68.5.12610.68.5.127
1210.68.5.128/2510.68.5.129 – 10.68.5.25410.68.5.255
1310.68.6.0/2510.68.6.1 – 10.68.6.12610.68.6.127
1410.68.6.128/2510.68.6.129 – 10.68.6.25410.68.6.255
1510.68.7.0/2510.68.7.1 – 10.68.7.12610.68.7.127
1610.68.7.128/2510.68.7.129 – 10.68.7.25410.68.7.255
1710.68.8.0/2510.68.8.1 – 10.68.8.12610.68.8.127
1810.68.8.128/2510.68.8.129 – 10.68.8.25410.68.8.255
1910.68.9.0/2510.68.9.1 – 10.68.9.12610.68.9.127
2010.68.9.128/2510.68.9.129 – 10.68.9.25410.68.9.255
2110.68.10.0/2510.68.10.1 – 10.68.10.12610.68.10.127
2210.68.10.128/2510.68.10.129 – 10.68.10.25410.68.10.255
2310.68.11.0/2510.68.11.1 – 10.68.11.12610.68.11.127
2410.68.11.128/2510.68.11.129 – 10.68.11.25410.68.11.255
2510.68.12.0/2510.68.12.1 – 10.68.12.12610.68.12.127
2610.68.12.128/2510.68.12.129 – 10.68.12.25410.68.12.255
2710.68.13.0/2510.68.13.1 – 10.68.13.12610.68.13.127
2810.68.13.128/2510.68.13.129 – 10.68.13.25410.68.13.255
2910.68.14.0/2510.68.14.1 – 10.68.14.12610.68.14.127
3010.68.14.128/2510.68.14.129 – 10.68.14.25410.68.14.255
3110.68.15.0/2510.68.15.1 – 10.68.15.12610.68.15.127
3210.68.15.128/2510.68.15.129 – 10.68.15.25410.68.15.255
3310.68.16.0/2510.68.16.1 – 10.68.16.12610.68.16.127
3410.68.16.128/2510.68.16.129 – 10.68.16.25410.68.16.255
3510.68.17.0/2510.68.17.1 – 10.68.17.12610.68.17.127
3610.68.17.128/2510.68.17.129 – 10.68.17.25410.68.17.255
3710.68.18.0/2510.68.18.1 – 10.68.18.12610.68.18.127
3810.68.18.128/2510.68.18.129 – 10.68.18.25410.68.18.255
3910.68.19.0/2510.68.19.1 – 10.68.19.12610.68.19.127
4010.68.19.128/2510.68.19.129 – 10.68.19.25410.68.19.255
4110.68.20.0/2510.68.20.1 – 10.68.20.12610.68.20.127
4210.68.20.128/2510.68.20.129 – 10.68.20.25410.68.20.255
4310.68.21.0/2510.68.21.1 – 10.68.21.12610.68.21.127
4410.68.21.128/2510.68.21.129 – 10.68.21.25410.68.21.255
4510.68.22.0/2510.68.22.1 – 10.68.22.12610.68.22.127
4610.68.22.128/2510.68.22.129 – 10.68.22.25410.68.22.255
4710.68.23.0/2510.68.23.1 – 10.68.23.12610.68.23.127
4810.68.23.128/2510.68.23.129 – 10.68.23.25410.68.23.255
4910.68.24.0/2510.68.24.1 – 10.68.24.12610.68.24.127
5010.68.24.128/2510.68.24.129 – 10.68.24.25410.68.24.255
5110.68.25.0/2510.68.25.1 – 10.68.25.12610.68.25.127
5210.68.25.128/2510.68.25.129 – 10.68.25.25410.68.25.255
5310.68.26.0/2510.68.26.1 – 10.68.26.12610.68.26.127
5410.68.26.128/2510.68.26.129 – 10.68.26.25410.68.26.255
5510.68.27.0/2510.68.27.1 – 10.68.27.12610.68.27.127
5610.68.27.128/2510.68.27.129 – 10.68.27.25410.68.27.255
5710.68.28.0/2510.68.28.1 – 10.68.28.12610.68.28.127
5810.68.28.128/2510.68.28.129 – 10.68.28.25410.68.28.255
5910.68.29.0/2510.68.29.1 – 10.68.29.12610.68.29.127
6010.68.29.128/2510.68.29.129 – 10.68.29.25410.68.29.255
6110.68.30.0/2510.68.30.1 – 10.68.30.12610.68.30.127
6210.68.30.128/2510.68.30.129 – 10.68.30.25410.68.30.255
6310.68.31.0/2510.68.31.1 – 10.68.31.12610.68.31.127
6410.68.31.128/2510.68.31.129 – 10.68.31.25410.68.31.255
6510.68.32.0/2510.68.32.1 – 10.68.32.12610.68.32.127
6610.68.32.128/2510.68.32.129 – 10.68.32.25410.68.32.255
6710.68.33.0/2510.68.33.1 – 10.68.33.12610.68.33.127
6810.68.33.128/2510.68.33.129 – 10.68.33.25410.68.33.255
6910.68.34.0/2510.68.34.1 – 10.68.34.12610.68.34.127
7010.68.34.128/2510.68.34.129 – 10.68.34.25410.68.34.255
7110.68.35.0/2510.68.35.1 – 10.68.35.12610.68.35.127
7210.68.35.128/2510.68.35.129 – 10.68.35.25410.68.35.255
7310.68.36.0/2510.68.36.1 – 10.68.36.12610.68.36.127
7410.68.36.128/2510.68.36.129 – 10.68.36.25410.68.36.255
7510.68.37.0/2510.68.37.1 – 10.68.37.12610.68.37.127
7610.68.37.128/2510.68.37.129 – 10.68.37.25410.68.37.255
7710.68.38.0/2510.68.38.1 – 10.68.38.12610.68.38.127
7810.68.38.128/2510.68.38.129 – 10.68.38.25410.68.38.255
7910.68.39.0/2510.68.39.1 – 10.68.39.12610.68.39.127
8010.68.39.128/2510.68.39.129 – 10.68.39.25410.68.39.255
8110.68.40.0/2510.68.40.1 – 10.68.40.12610.68.40.127
8210.68.40.128/2510.68.40.129 – 10.68.40.25410.68.40.255
8310.68.41.0/2510.68.41.1 – 10.68.41.12610.68.41.127
8410.68.41.128/2510.68.41.129 – 10.68.41.25410.68.41.255
8510.68.42.0/2510.68.42.1 – 10.68.42.12610.68.42.127
8610.68.42.128/2510.68.42.129 – 10.68.42.25410.68.42.255
8710.68.43.0/2510.68.43.1 – 10.68.43.12610.68.43.127
8810.68.43.128/2510.68.43.129 – 10.68.43.25410.68.43.255
8910.68.44.0/2510.68.44.1 – 10.68.44.12610.68.44.127
9010.68.44.128/2510.68.44.129 – 10.68.44.25410.68.44.255
9110.68.45.0/2510.68.45.1 – 10.68.45.12610.68.45.127
9210.68.45.128/2510.68.45.129 – 10.68.45.25410.68.45.255
9310.68.46.0/2510.68.46.1 – 10.68.46.12610.68.46.127
9410.68.46.128/2510.68.46.129 – 10.68.46.25410.68.46.255
9510.68.47.0/2510.68.47.1 – 10.68.47.12610.68.47.127
9610.68.47.128/2510.68.47.129 – 10.68.47.25410.68.47.255
9710.68.48.0/2510.68.48.1 – 10.68.48.12610.68.48.127
9810.68.48.128/2510.68.48.129 – 10.68.48.25410.68.48.255
9910.68.49.0/2510.68.49.1 – 10.68.49.12610.68.49.127
10010.68.49.128/2510.68.49.129 – 10.68.49.25410.68.49.255
10110.68.50.0/2510.68.50.1 – 10.68.50.12610.68.50.127
10210.68.50.128/2510.68.50.129 – 10.68.50.25410.68.50.255
10310.68.51.0/2510.68.51.1 – 10.68.51.12610.68.51.127
10410.68.51.128/2510.68.51.129 – 10.68.51.25410.68.51.255
10510.68.52.0/2510.68.52.1 – 10.68.52.12610.68.52.127
10610.68.52.128/2510.68.52.129 – 10.68.52.25410.68.52.255
10710.68.53.0/2510.68.53.1 – 10.68.53.12610.68.53.127
10810.68.53.128/2510.68.53.129 – 10.68.53.25410.68.53.255
10910.68.54.0/2510.68.54.1 – 10.68.54.12610.68.54.127
11010.68.54.128/2510.68.54.129 – 10.68.54.25410.68.54.255
11110.68.55.0/2510.68.55.1 – 10.68.55.12610.68.55.127
11210.68.55.128/2510.68.55.129 – 10.68.55.25410.68.55.255
11310.68.56.0/2510.68.56.1 – 10.68.56.12610.68.56.127
11410.68.56.128/2510.68.56.129 – 10.68.56.25410.68.56.255
11510.68.57.0/2510.68.57.1 – 10.68.57.12610.68.57.127
11610.68.57.128/2510.68.57.129 – 10.68.57.25410.68.57.255
11710.68.58.0/2510.68.58.1 – 10.68.58.12610.68.58.127
11810.68.58.128/2510.68.58.129 – 10.68.58.25410.68.58.255
11910.68.59.0/2510.68.59.1 – 10.68.59.12610.68.59.127
12010.68.59.128/2510.68.59.129 – 10.68.59.25410.68.59.255
12110.68.60.0/2510.68.60.1 – 10.68.60.12610.68.60.127
12210.68.60.128/2510.68.60.129 – 10.68.60.25410.68.60.255
12310.68.61.0/2510.68.61.1 – 10.68.61.12610.68.61.127
12410.68.61.128/2510.68.61.129 – 10.68.61.25410.68.61.255
12510.68.62.0/2510.68.62.1 – 10.68.62.12610.68.62.127
12610.68.62.128/2510.68.62.129 – 10.68.62.25410.68.62.255
12710.68.63.0/2510.68.63.1 – 10.68.63.12610.68.63.127
12810.68.63.128/2510.68.63.129 – 10.68.63.25410.68.63.255
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 →