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)10.158.0.0/18
network10.158.0.0/18
broadcast10.158.63.255
first host10.158.0.1
last host10.158.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.158.0.0/18
address00001010.10011110.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.10011110.00000000.00000000
broadcast00001010.10011110.00111111.11111111
green = network part, grey = host part
hex0x0a9e0000
decimal178126848
reverse dns0.0.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.158.0.0/2510.158.0.1 – 10.158.0.12610.158.0.127
210.158.0.128/2510.158.0.129 – 10.158.0.25410.158.0.255
310.158.1.0/2510.158.1.1 – 10.158.1.12610.158.1.127
410.158.1.128/2510.158.1.129 – 10.158.1.25410.158.1.255
510.158.2.0/2510.158.2.1 – 10.158.2.12610.158.2.127
610.158.2.128/2510.158.2.129 – 10.158.2.25410.158.2.255
710.158.3.0/2510.158.3.1 – 10.158.3.12610.158.3.127
810.158.3.128/2510.158.3.129 – 10.158.3.25410.158.3.255
910.158.4.0/2510.158.4.1 – 10.158.4.12610.158.4.127
1010.158.4.128/2510.158.4.129 – 10.158.4.25410.158.4.255
1110.158.5.0/2510.158.5.1 – 10.158.5.12610.158.5.127
1210.158.5.128/2510.158.5.129 – 10.158.5.25410.158.5.255
1310.158.6.0/2510.158.6.1 – 10.158.6.12610.158.6.127
1410.158.6.128/2510.158.6.129 – 10.158.6.25410.158.6.255
1510.158.7.0/2510.158.7.1 – 10.158.7.12610.158.7.127
1610.158.7.128/2510.158.7.129 – 10.158.7.25410.158.7.255
1710.158.8.0/2510.158.8.1 – 10.158.8.12610.158.8.127
1810.158.8.128/2510.158.8.129 – 10.158.8.25410.158.8.255
1910.158.9.0/2510.158.9.1 – 10.158.9.12610.158.9.127
2010.158.9.128/2510.158.9.129 – 10.158.9.25410.158.9.255
2110.158.10.0/2510.158.10.1 – 10.158.10.12610.158.10.127
2210.158.10.128/2510.158.10.129 – 10.158.10.25410.158.10.255
2310.158.11.0/2510.158.11.1 – 10.158.11.12610.158.11.127
2410.158.11.128/2510.158.11.129 – 10.158.11.25410.158.11.255
2510.158.12.0/2510.158.12.1 – 10.158.12.12610.158.12.127
2610.158.12.128/2510.158.12.129 – 10.158.12.25410.158.12.255
2710.158.13.0/2510.158.13.1 – 10.158.13.12610.158.13.127
2810.158.13.128/2510.158.13.129 – 10.158.13.25410.158.13.255
2910.158.14.0/2510.158.14.1 – 10.158.14.12610.158.14.127
3010.158.14.128/2510.158.14.129 – 10.158.14.25410.158.14.255
3110.158.15.0/2510.158.15.1 – 10.158.15.12610.158.15.127
3210.158.15.128/2510.158.15.129 – 10.158.15.25410.158.15.255
3310.158.16.0/2510.158.16.1 – 10.158.16.12610.158.16.127
3410.158.16.128/2510.158.16.129 – 10.158.16.25410.158.16.255
3510.158.17.0/2510.158.17.1 – 10.158.17.12610.158.17.127
3610.158.17.128/2510.158.17.129 – 10.158.17.25410.158.17.255
3710.158.18.0/2510.158.18.1 – 10.158.18.12610.158.18.127
3810.158.18.128/2510.158.18.129 – 10.158.18.25410.158.18.255
3910.158.19.0/2510.158.19.1 – 10.158.19.12610.158.19.127
4010.158.19.128/2510.158.19.129 – 10.158.19.25410.158.19.255
4110.158.20.0/2510.158.20.1 – 10.158.20.12610.158.20.127
4210.158.20.128/2510.158.20.129 – 10.158.20.25410.158.20.255
4310.158.21.0/2510.158.21.1 – 10.158.21.12610.158.21.127
4410.158.21.128/2510.158.21.129 – 10.158.21.25410.158.21.255
4510.158.22.0/2510.158.22.1 – 10.158.22.12610.158.22.127
4610.158.22.128/2510.158.22.129 – 10.158.22.25410.158.22.255
4710.158.23.0/2510.158.23.1 – 10.158.23.12610.158.23.127
4810.158.23.128/2510.158.23.129 – 10.158.23.25410.158.23.255
4910.158.24.0/2510.158.24.1 – 10.158.24.12610.158.24.127
5010.158.24.128/2510.158.24.129 – 10.158.24.25410.158.24.255
5110.158.25.0/2510.158.25.1 – 10.158.25.12610.158.25.127
5210.158.25.128/2510.158.25.129 – 10.158.25.25410.158.25.255
5310.158.26.0/2510.158.26.1 – 10.158.26.12610.158.26.127
5410.158.26.128/2510.158.26.129 – 10.158.26.25410.158.26.255
5510.158.27.0/2510.158.27.1 – 10.158.27.12610.158.27.127
5610.158.27.128/2510.158.27.129 – 10.158.27.25410.158.27.255
5710.158.28.0/2510.158.28.1 – 10.158.28.12610.158.28.127
5810.158.28.128/2510.158.28.129 – 10.158.28.25410.158.28.255
5910.158.29.0/2510.158.29.1 – 10.158.29.12610.158.29.127
6010.158.29.128/2510.158.29.129 – 10.158.29.25410.158.29.255
6110.158.30.0/2510.158.30.1 – 10.158.30.12610.158.30.127
6210.158.30.128/2510.158.30.129 – 10.158.30.25410.158.30.255
6310.158.31.0/2510.158.31.1 – 10.158.31.12610.158.31.127
6410.158.31.128/2510.158.31.129 – 10.158.31.25410.158.31.255
6510.158.32.0/2510.158.32.1 – 10.158.32.12610.158.32.127
6610.158.32.128/2510.158.32.129 – 10.158.32.25410.158.32.255
6710.158.33.0/2510.158.33.1 – 10.158.33.12610.158.33.127
6810.158.33.128/2510.158.33.129 – 10.158.33.25410.158.33.255
6910.158.34.0/2510.158.34.1 – 10.158.34.12610.158.34.127
7010.158.34.128/2510.158.34.129 – 10.158.34.25410.158.34.255
7110.158.35.0/2510.158.35.1 – 10.158.35.12610.158.35.127
7210.158.35.128/2510.158.35.129 – 10.158.35.25410.158.35.255
7310.158.36.0/2510.158.36.1 – 10.158.36.12610.158.36.127
7410.158.36.128/2510.158.36.129 – 10.158.36.25410.158.36.255
7510.158.37.0/2510.158.37.1 – 10.158.37.12610.158.37.127
7610.158.37.128/2510.158.37.129 – 10.158.37.25410.158.37.255
7710.158.38.0/2510.158.38.1 – 10.158.38.12610.158.38.127
7810.158.38.128/2510.158.38.129 – 10.158.38.25410.158.38.255
7910.158.39.0/2510.158.39.1 – 10.158.39.12610.158.39.127
8010.158.39.128/2510.158.39.129 – 10.158.39.25410.158.39.255
8110.158.40.0/2510.158.40.1 – 10.158.40.12610.158.40.127
8210.158.40.128/2510.158.40.129 – 10.158.40.25410.158.40.255
8310.158.41.0/2510.158.41.1 – 10.158.41.12610.158.41.127
8410.158.41.128/2510.158.41.129 – 10.158.41.25410.158.41.255
8510.158.42.0/2510.158.42.1 – 10.158.42.12610.158.42.127
8610.158.42.128/2510.158.42.129 – 10.158.42.25410.158.42.255
8710.158.43.0/2510.158.43.1 – 10.158.43.12610.158.43.127
8810.158.43.128/2510.158.43.129 – 10.158.43.25410.158.43.255
8910.158.44.0/2510.158.44.1 – 10.158.44.12610.158.44.127
9010.158.44.128/2510.158.44.129 – 10.158.44.25410.158.44.255
9110.158.45.0/2510.158.45.1 – 10.158.45.12610.158.45.127
9210.158.45.128/2510.158.45.129 – 10.158.45.25410.158.45.255
9310.158.46.0/2510.158.46.1 – 10.158.46.12610.158.46.127
9410.158.46.128/2510.158.46.129 – 10.158.46.25410.158.46.255
9510.158.47.0/2510.158.47.1 – 10.158.47.12610.158.47.127
9610.158.47.128/2510.158.47.129 – 10.158.47.25410.158.47.255
9710.158.48.0/2510.158.48.1 – 10.158.48.12610.158.48.127
9810.158.48.128/2510.158.48.129 – 10.158.48.25410.158.48.255
9910.158.49.0/2510.158.49.1 – 10.158.49.12610.158.49.127
10010.158.49.128/2510.158.49.129 – 10.158.49.25410.158.49.255
10110.158.50.0/2510.158.50.1 – 10.158.50.12610.158.50.127
10210.158.50.128/2510.158.50.129 – 10.158.50.25410.158.50.255
10310.158.51.0/2510.158.51.1 – 10.158.51.12610.158.51.127
10410.158.51.128/2510.158.51.129 – 10.158.51.25410.158.51.255
10510.158.52.0/2510.158.52.1 – 10.158.52.12610.158.52.127
10610.158.52.128/2510.158.52.129 – 10.158.52.25410.158.52.255
10710.158.53.0/2510.158.53.1 – 10.158.53.12610.158.53.127
10810.158.53.128/2510.158.53.129 – 10.158.53.25410.158.53.255
10910.158.54.0/2510.158.54.1 – 10.158.54.12610.158.54.127
11010.158.54.128/2510.158.54.129 – 10.158.54.25410.158.54.255
11110.158.55.0/2510.158.55.1 – 10.158.55.12610.158.55.127
11210.158.55.128/2510.158.55.129 – 10.158.55.25410.158.55.255
11310.158.56.0/2510.158.56.1 – 10.158.56.12610.158.56.127
11410.158.56.128/2510.158.56.129 – 10.158.56.25410.158.56.255
11510.158.57.0/2510.158.57.1 – 10.158.57.12610.158.57.127
11610.158.57.128/2510.158.57.129 – 10.158.57.25410.158.57.255
11710.158.58.0/2510.158.58.1 – 10.158.58.12610.158.58.127
11810.158.58.128/2510.158.58.129 – 10.158.58.25410.158.58.255
11910.158.59.0/2510.158.59.1 – 10.158.59.12610.158.59.127
12010.158.59.128/2510.158.59.129 – 10.158.59.25410.158.59.255
12110.158.60.0/2510.158.60.1 – 10.158.60.12610.158.60.127
12210.158.60.128/2510.158.60.129 – 10.158.60.25410.158.60.255
12310.158.61.0/2510.158.61.1 – 10.158.61.12610.158.61.127
12410.158.61.128/2510.158.61.129 – 10.158.61.25410.158.61.255
12510.158.62.0/2510.158.62.1 – 10.158.62.12610.158.62.127
12610.158.62.128/2510.158.62.129 – 10.158.62.25410.158.62.255
12710.158.63.0/2510.158.63.1 – 10.158.63.12610.158.63.127
12810.158.63.128/2510.158.63.129 – 10.158.63.25410.158.63.255
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 →