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)10.7.0.0/18
network10.7.0.0/18
broadcast10.7.63.255
first host10.7.0.1
last host10.7.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.7.0.0/18
address00001010.00000111.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00000111.00000000.00000000
broadcast00001010.00000111.00111111.11111111
green = network part, grey = host part
hex0x0a070000
decimal168230912
reverse dns0.0.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.0.0/2510.7.0.1 – 10.7.0.12610.7.0.127
210.7.0.128/2510.7.0.129 – 10.7.0.25410.7.0.255
310.7.1.0/2510.7.1.1 – 10.7.1.12610.7.1.127
410.7.1.128/2510.7.1.129 – 10.7.1.25410.7.1.255
510.7.2.0/2510.7.2.1 – 10.7.2.12610.7.2.127
610.7.2.128/2510.7.2.129 – 10.7.2.25410.7.2.255
710.7.3.0/2510.7.3.1 – 10.7.3.12610.7.3.127
810.7.3.128/2510.7.3.129 – 10.7.3.25410.7.3.255
910.7.4.0/2510.7.4.1 – 10.7.4.12610.7.4.127
1010.7.4.128/2510.7.4.129 – 10.7.4.25410.7.4.255
1110.7.5.0/2510.7.5.1 – 10.7.5.12610.7.5.127
1210.7.5.128/2510.7.5.129 – 10.7.5.25410.7.5.255
1310.7.6.0/2510.7.6.1 – 10.7.6.12610.7.6.127
1410.7.6.128/2510.7.6.129 – 10.7.6.25410.7.6.255
1510.7.7.0/2510.7.7.1 – 10.7.7.12610.7.7.127
1610.7.7.128/2510.7.7.129 – 10.7.7.25410.7.7.255
1710.7.8.0/2510.7.8.1 – 10.7.8.12610.7.8.127
1810.7.8.128/2510.7.8.129 – 10.7.8.25410.7.8.255
1910.7.9.0/2510.7.9.1 – 10.7.9.12610.7.9.127
2010.7.9.128/2510.7.9.129 – 10.7.9.25410.7.9.255
2110.7.10.0/2510.7.10.1 – 10.7.10.12610.7.10.127
2210.7.10.128/2510.7.10.129 – 10.7.10.25410.7.10.255
2310.7.11.0/2510.7.11.1 – 10.7.11.12610.7.11.127
2410.7.11.128/2510.7.11.129 – 10.7.11.25410.7.11.255
2510.7.12.0/2510.7.12.1 – 10.7.12.12610.7.12.127
2610.7.12.128/2510.7.12.129 – 10.7.12.25410.7.12.255
2710.7.13.0/2510.7.13.1 – 10.7.13.12610.7.13.127
2810.7.13.128/2510.7.13.129 – 10.7.13.25410.7.13.255
2910.7.14.0/2510.7.14.1 – 10.7.14.12610.7.14.127
3010.7.14.128/2510.7.14.129 – 10.7.14.25410.7.14.255
3110.7.15.0/2510.7.15.1 – 10.7.15.12610.7.15.127
3210.7.15.128/2510.7.15.129 – 10.7.15.25410.7.15.255
3310.7.16.0/2510.7.16.1 – 10.7.16.12610.7.16.127
3410.7.16.128/2510.7.16.129 – 10.7.16.25410.7.16.255
3510.7.17.0/2510.7.17.1 – 10.7.17.12610.7.17.127
3610.7.17.128/2510.7.17.129 – 10.7.17.25410.7.17.255
3710.7.18.0/2510.7.18.1 – 10.7.18.12610.7.18.127
3810.7.18.128/2510.7.18.129 – 10.7.18.25410.7.18.255
3910.7.19.0/2510.7.19.1 – 10.7.19.12610.7.19.127
4010.7.19.128/2510.7.19.129 – 10.7.19.25410.7.19.255
4110.7.20.0/2510.7.20.1 – 10.7.20.12610.7.20.127
4210.7.20.128/2510.7.20.129 – 10.7.20.25410.7.20.255
4310.7.21.0/2510.7.21.1 – 10.7.21.12610.7.21.127
4410.7.21.128/2510.7.21.129 – 10.7.21.25410.7.21.255
4510.7.22.0/2510.7.22.1 – 10.7.22.12610.7.22.127
4610.7.22.128/2510.7.22.129 – 10.7.22.25410.7.22.255
4710.7.23.0/2510.7.23.1 – 10.7.23.12610.7.23.127
4810.7.23.128/2510.7.23.129 – 10.7.23.25410.7.23.255
4910.7.24.0/2510.7.24.1 – 10.7.24.12610.7.24.127
5010.7.24.128/2510.7.24.129 – 10.7.24.25410.7.24.255
5110.7.25.0/2510.7.25.1 – 10.7.25.12610.7.25.127
5210.7.25.128/2510.7.25.129 – 10.7.25.25410.7.25.255
5310.7.26.0/2510.7.26.1 – 10.7.26.12610.7.26.127
5410.7.26.128/2510.7.26.129 – 10.7.26.25410.7.26.255
5510.7.27.0/2510.7.27.1 – 10.7.27.12610.7.27.127
5610.7.27.128/2510.7.27.129 – 10.7.27.25410.7.27.255
5710.7.28.0/2510.7.28.1 – 10.7.28.12610.7.28.127
5810.7.28.128/2510.7.28.129 – 10.7.28.25410.7.28.255
5910.7.29.0/2510.7.29.1 – 10.7.29.12610.7.29.127
6010.7.29.128/2510.7.29.129 – 10.7.29.25410.7.29.255
6110.7.30.0/2510.7.30.1 – 10.7.30.12610.7.30.127
6210.7.30.128/2510.7.30.129 – 10.7.30.25410.7.30.255
6310.7.31.0/2510.7.31.1 – 10.7.31.12610.7.31.127
6410.7.31.128/2510.7.31.129 – 10.7.31.25410.7.31.255
6510.7.32.0/2510.7.32.1 – 10.7.32.12610.7.32.127
6610.7.32.128/2510.7.32.129 – 10.7.32.25410.7.32.255
6710.7.33.0/2510.7.33.1 – 10.7.33.12610.7.33.127
6810.7.33.128/2510.7.33.129 – 10.7.33.25410.7.33.255
6910.7.34.0/2510.7.34.1 – 10.7.34.12610.7.34.127
7010.7.34.128/2510.7.34.129 – 10.7.34.25410.7.34.255
7110.7.35.0/2510.7.35.1 – 10.7.35.12610.7.35.127
7210.7.35.128/2510.7.35.129 – 10.7.35.25410.7.35.255
7310.7.36.0/2510.7.36.1 – 10.7.36.12610.7.36.127
7410.7.36.128/2510.7.36.129 – 10.7.36.25410.7.36.255
7510.7.37.0/2510.7.37.1 – 10.7.37.12610.7.37.127
7610.7.37.128/2510.7.37.129 – 10.7.37.25410.7.37.255
7710.7.38.0/2510.7.38.1 – 10.7.38.12610.7.38.127
7810.7.38.128/2510.7.38.129 – 10.7.38.25410.7.38.255
7910.7.39.0/2510.7.39.1 – 10.7.39.12610.7.39.127
8010.7.39.128/2510.7.39.129 – 10.7.39.25410.7.39.255
8110.7.40.0/2510.7.40.1 – 10.7.40.12610.7.40.127
8210.7.40.128/2510.7.40.129 – 10.7.40.25410.7.40.255
8310.7.41.0/2510.7.41.1 – 10.7.41.12610.7.41.127
8410.7.41.128/2510.7.41.129 – 10.7.41.25410.7.41.255
8510.7.42.0/2510.7.42.1 – 10.7.42.12610.7.42.127
8610.7.42.128/2510.7.42.129 – 10.7.42.25410.7.42.255
8710.7.43.0/2510.7.43.1 – 10.7.43.12610.7.43.127
8810.7.43.128/2510.7.43.129 – 10.7.43.25410.7.43.255
8910.7.44.0/2510.7.44.1 – 10.7.44.12610.7.44.127
9010.7.44.128/2510.7.44.129 – 10.7.44.25410.7.44.255
9110.7.45.0/2510.7.45.1 – 10.7.45.12610.7.45.127
9210.7.45.128/2510.7.45.129 – 10.7.45.25410.7.45.255
9310.7.46.0/2510.7.46.1 – 10.7.46.12610.7.46.127
9410.7.46.128/2510.7.46.129 – 10.7.46.25410.7.46.255
9510.7.47.0/2510.7.47.1 – 10.7.47.12610.7.47.127
9610.7.47.128/2510.7.47.129 – 10.7.47.25410.7.47.255
9710.7.48.0/2510.7.48.1 – 10.7.48.12610.7.48.127
9810.7.48.128/2510.7.48.129 – 10.7.48.25410.7.48.255
9910.7.49.0/2510.7.49.1 – 10.7.49.12610.7.49.127
10010.7.49.128/2510.7.49.129 – 10.7.49.25410.7.49.255
10110.7.50.0/2510.7.50.1 – 10.7.50.12610.7.50.127
10210.7.50.128/2510.7.50.129 – 10.7.50.25410.7.50.255
10310.7.51.0/2510.7.51.1 – 10.7.51.12610.7.51.127
10410.7.51.128/2510.7.51.129 – 10.7.51.25410.7.51.255
10510.7.52.0/2510.7.52.1 – 10.7.52.12610.7.52.127
10610.7.52.128/2510.7.52.129 – 10.7.52.25410.7.52.255
10710.7.53.0/2510.7.53.1 – 10.7.53.12610.7.53.127
10810.7.53.128/2510.7.53.129 – 10.7.53.25410.7.53.255
10910.7.54.0/2510.7.54.1 – 10.7.54.12610.7.54.127
11010.7.54.128/2510.7.54.129 – 10.7.54.25410.7.54.255
11110.7.55.0/2510.7.55.1 – 10.7.55.12610.7.55.127
11210.7.55.128/2510.7.55.129 – 10.7.55.25410.7.55.255
11310.7.56.0/2510.7.56.1 – 10.7.56.12610.7.56.127
11410.7.56.128/2510.7.56.129 – 10.7.56.25410.7.56.255
11510.7.57.0/2510.7.57.1 – 10.7.57.12610.7.57.127
11610.7.57.128/2510.7.57.129 – 10.7.57.25410.7.57.255
11710.7.58.0/2510.7.58.1 – 10.7.58.12610.7.58.127
11810.7.58.128/2510.7.58.129 – 10.7.58.25410.7.58.255
11910.7.59.0/2510.7.59.1 – 10.7.59.12610.7.59.127
12010.7.59.128/2510.7.59.129 – 10.7.59.25410.7.59.255
12110.7.60.0/2510.7.60.1 – 10.7.60.12610.7.60.127
12210.7.60.128/2510.7.60.129 – 10.7.60.25410.7.60.255
12310.7.61.0/2510.7.61.1 – 10.7.61.12610.7.61.127
12410.7.61.128/2510.7.61.129 – 10.7.61.25410.7.61.255
12510.7.62.0/2510.7.62.1 – 10.7.62.12610.7.62.127
12610.7.62.128/2510.7.62.129 – 10.7.62.25410.7.62.255
12710.7.63.0/2510.7.63.1 – 10.7.63.12610.7.63.127
12810.7.63.128/2510.7.63.129 – 10.7.63.25410.7.63.255
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 →