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)10.36.0.0/18
network10.36.0.0/18
broadcast10.36.63.255
first host10.36.0.1
last host10.36.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.36.0.0/18
address00001010.00100100.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00100100.00000000.00000000
broadcast00001010.00100100.00111111.11111111
green = network part, grey = host part
hex0x0a240000
decimal170131456
reverse dns0.0.36.10.in-addr.arpa
ipv4-mapped::ffff:a24:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.36.0.0/2510.36.0.1 – 10.36.0.12610.36.0.127
210.36.0.128/2510.36.0.129 – 10.36.0.25410.36.0.255
310.36.1.0/2510.36.1.1 – 10.36.1.12610.36.1.127
410.36.1.128/2510.36.1.129 – 10.36.1.25410.36.1.255
510.36.2.0/2510.36.2.1 – 10.36.2.12610.36.2.127
610.36.2.128/2510.36.2.129 – 10.36.2.25410.36.2.255
710.36.3.0/2510.36.3.1 – 10.36.3.12610.36.3.127
810.36.3.128/2510.36.3.129 – 10.36.3.25410.36.3.255
910.36.4.0/2510.36.4.1 – 10.36.4.12610.36.4.127
1010.36.4.128/2510.36.4.129 – 10.36.4.25410.36.4.255
1110.36.5.0/2510.36.5.1 – 10.36.5.12610.36.5.127
1210.36.5.128/2510.36.5.129 – 10.36.5.25410.36.5.255
1310.36.6.0/2510.36.6.1 – 10.36.6.12610.36.6.127
1410.36.6.128/2510.36.6.129 – 10.36.6.25410.36.6.255
1510.36.7.0/2510.36.7.1 – 10.36.7.12610.36.7.127
1610.36.7.128/2510.36.7.129 – 10.36.7.25410.36.7.255
1710.36.8.0/2510.36.8.1 – 10.36.8.12610.36.8.127
1810.36.8.128/2510.36.8.129 – 10.36.8.25410.36.8.255
1910.36.9.0/2510.36.9.1 – 10.36.9.12610.36.9.127
2010.36.9.128/2510.36.9.129 – 10.36.9.25410.36.9.255
2110.36.10.0/2510.36.10.1 – 10.36.10.12610.36.10.127
2210.36.10.128/2510.36.10.129 – 10.36.10.25410.36.10.255
2310.36.11.0/2510.36.11.1 – 10.36.11.12610.36.11.127
2410.36.11.128/2510.36.11.129 – 10.36.11.25410.36.11.255
2510.36.12.0/2510.36.12.1 – 10.36.12.12610.36.12.127
2610.36.12.128/2510.36.12.129 – 10.36.12.25410.36.12.255
2710.36.13.0/2510.36.13.1 – 10.36.13.12610.36.13.127
2810.36.13.128/2510.36.13.129 – 10.36.13.25410.36.13.255
2910.36.14.0/2510.36.14.1 – 10.36.14.12610.36.14.127
3010.36.14.128/2510.36.14.129 – 10.36.14.25410.36.14.255
3110.36.15.0/2510.36.15.1 – 10.36.15.12610.36.15.127
3210.36.15.128/2510.36.15.129 – 10.36.15.25410.36.15.255
3310.36.16.0/2510.36.16.1 – 10.36.16.12610.36.16.127
3410.36.16.128/2510.36.16.129 – 10.36.16.25410.36.16.255
3510.36.17.0/2510.36.17.1 – 10.36.17.12610.36.17.127
3610.36.17.128/2510.36.17.129 – 10.36.17.25410.36.17.255
3710.36.18.0/2510.36.18.1 – 10.36.18.12610.36.18.127
3810.36.18.128/2510.36.18.129 – 10.36.18.25410.36.18.255
3910.36.19.0/2510.36.19.1 – 10.36.19.12610.36.19.127
4010.36.19.128/2510.36.19.129 – 10.36.19.25410.36.19.255
4110.36.20.0/2510.36.20.1 – 10.36.20.12610.36.20.127
4210.36.20.128/2510.36.20.129 – 10.36.20.25410.36.20.255
4310.36.21.0/2510.36.21.1 – 10.36.21.12610.36.21.127
4410.36.21.128/2510.36.21.129 – 10.36.21.25410.36.21.255
4510.36.22.0/2510.36.22.1 – 10.36.22.12610.36.22.127
4610.36.22.128/2510.36.22.129 – 10.36.22.25410.36.22.255
4710.36.23.0/2510.36.23.1 – 10.36.23.12610.36.23.127
4810.36.23.128/2510.36.23.129 – 10.36.23.25410.36.23.255
4910.36.24.0/2510.36.24.1 – 10.36.24.12610.36.24.127
5010.36.24.128/2510.36.24.129 – 10.36.24.25410.36.24.255
5110.36.25.0/2510.36.25.1 – 10.36.25.12610.36.25.127
5210.36.25.128/2510.36.25.129 – 10.36.25.25410.36.25.255
5310.36.26.0/2510.36.26.1 – 10.36.26.12610.36.26.127
5410.36.26.128/2510.36.26.129 – 10.36.26.25410.36.26.255
5510.36.27.0/2510.36.27.1 – 10.36.27.12610.36.27.127
5610.36.27.128/2510.36.27.129 – 10.36.27.25410.36.27.255
5710.36.28.0/2510.36.28.1 – 10.36.28.12610.36.28.127
5810.36.28.128/2510.36.28.129 – 10.36.28.25410.36.28.255
5910.36.29.0/2510.36.29.1 – 10.36.29.12610.36.29.127
6010.36.29.128/2510.36.29.129 – 10.36.29.25410.36.29.255
6110.36.30.0/2510.36.30.1 – 10.36.30.12610.36.30.127
6210.36.30.128/2510.36.30.129 – 10.36.30.25410.36.30.255
6310.36.31.0/2510.36.31.1 – 10.36.31.12610.36.31.127
6410.36.31.128/2510.36.31.129 – 10.36.31.25410.36.31.255
6510.36.32.0/2510.36.32.1 – 10.36.32.12610.36.32.127
6610.36.32.128/2510.36.32.129 – 10.36.32.25410.36.32.255
6710.36.33.0/2510.36.33.1 – 10.36.33.12610.36.33.127
6810.36.33.128/2510.36.33.129 – 10.36.33.25410.36.33.255
6910.36.34.0/2510.36.34.1 – 10.36.34.12610.36.34.127
7010.36.34.128/2510.36.34.129 – 10.36.34.25410.36.34.255
7110.36.35.0/2510.36.35.1 – 10.36.35.12610.36.35.127
7210.36.35.128/2510.36.35.129 – 10.36.35.25410.36.35.255
7310.36.36.0/2510.36.36.1 – 10.36.36.12610.36.36.127
7410.36.36.128/2510.36.36.129 – 10.36.36.25410.36.36.255
7510.36.37.0/2510.36.37.1 – 10.36.37.12610.36.37.127
7610.36.37.128/2510.36.37.129 – 10.36.37.25410.36.37.255
7710.36.38.0/2510.36.38.1 – 10.36.38.12610.36.38.127
7810.36.38.128/2510.36.38.129 – 10.36.38.25410.36.38.255
7910.36.39.0/2510.36.39.1 – 10.36.39.12610.36.39.127
8010.36.39.128/2510.36.39.129 – 10.36.39.25410.36.39.255
8110.36.40.0/2510.36.40.1 – 10.36.40.12610.36.40.127
8210.36.40.128/2510.36.40.129 – 10.36.40.25410.36.40.255
8310.36.41.0/2510.36.41.1 – 10.36.41.12610.36.41.127
8410.36.41.128/2510.36.41.129 – 10.36.41.25410.36.41.255
8510.36.42.0/2510.36.42.1 – 10.36.42.12610.36.42.127
8610.36.42.128/2510.36.42.129 – 10.36.42.25410.36.42.255
8710.36.43.0/2510.36.43.1 – 10.36.43.12610.36.43.127
8810.36.43.128/2510.36.43.129 – 10.36.43.25410.36.43.255
8910.36.44.0/2510.36.44.1 – 10.36.44.12610.36.44.127
9010.36.44.128/2510.36.44.129 – 10.36.44.25410.36.44.255
9110.36.45.0/2510.36.45.1 – 10.36.45.12610.36.45.127
9210.36.45.128/2510.36.45.129 – 10.36.45.25410.36.45.255
9310.36.46.0/2510.36.46.1 – 10.36.46.12610.36.46.127
9410.36.46.128/2510.36.46.129 – 10.36.46.25410.36.46.255
9510.36.47.0/2510.36.47.1 – 10.36.47.12610.36.47.127
9610.36.47.128/2510.36.47.129 – 10.36.47.25410.36.47.255
9710.36.48.0/2510.36.48.1 – 10.36.48.12610.36.48.127
9810.36.48.128/2510.36.48.129 – 10.36.48.25410.36.48.255
9910.36.49.0/2510.36.49.1 – 10.36.49.12610.36.49.127
10010.36.49.128/2510.36.49.129 – 10.36.49.25410.36.49.255
10110.36.50.0/2510.36.50.1 – 10.36.50.12610.36.50.127
10210.36.50.128/2510.36.50.129 – 10.36.50.25410.36.50.255
10310.36.51.0/2510.36.51.1 – 10.36.51.12610.36.51.127
10410.36.51.128/2510.36.51.129 – 10.36.51.25410.36.51.255
10510.36.52.0/2510.36.52.1 – 10.36.52.12610.36.52.127
10610.36.52.128/2510.36.52.129 – 10.36.52.25410.36.52.255
10710.36.53.0/2510.36.53.1 – 10.36.53.12610.36.53.127
10810.36.53.128/2510.36.53.129 – 10.36.53.25410.36.53.255
10910.36.54.0/2510.36.54.1 – 10.36.54.12610.36.54.127
11010.36.54.128/2510.36.54.129 – 10.36.54.25410.36.54.255
11110.36.55.0/2510.36.55.1 – 10.36.55.12610.36.55.127
11210.36.55.128/2510.36.55.129 – 10.36.55.25410.36.55.255
11310.36.56.0/2510.36.56.1 – 10.36.56.12610.36.56.127
11410.36.56.128/2510.36.56.129 – 10.36.56.25410.36.56.255
11510.36.57.0/2510.36.57.1 – 10.36.57.12610.36.57.127
11610.36.57.128/2510.36.57.129 – 10.36.57.25410.36.57.255
11710.36.58.0/2510.36.58.1 – 10.36.58.12610.36.58.127
11810.36.58.128/2510.36.58.129 – 10.36.58.25410.36.58.255
11910.36.59.0/2510.36.59.1 – 10.36.59.12610.36.59.127
12010.36.59.128/2510.36.59.129 – 10.36.59.25410.36.59.255
12110.36.60.0/2510.36.60.1 – 10.36.60.12610.36.60.127
12210.36.60.128/2510.36.60.129 – 10.36.60.25410.36.60.255
12310.36.61.0/2510.36.61.1 – 10.36.61.12610.36.61.127
12410.36.61.128/2510.36.61.129 – 10.36.61.25410.36.61.255
12510.36.62.0/2510.36.62.1 – 10.36.62.12610.36.62.127
12610.36.62.128/2510.36.62.129 – 10.36.62.25410.36.62.255
12710.36.63.0/2510.36.63.1 – 10.36.63.12610.36.63.127
12810.36.63.128/2510.36.63.129 – 10.36.63.25410.36.63.255
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 →