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)10.24.0.0/18
network10.24.0.0/18
broadcast10.24.63.255
first host10.24.0.1
last host10.24.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.24.0.0/18
address00001010.00011000.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00011000.00000000.00000000
broadcast00001010.00011000.00111111.11111111
green = network part, grey = host part
hex0x0a180000
decimal169345024
reverse dns0.0.24.10.in-addr.arpa
ipv4-mapped::ffff:a18:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.24.0.0/2510.24.0.1 – 10.24.0.12610.24.0.127
210.24.0.128/2510.24.0.129 – 10.24.0.25410.24.0.255
310.24.1.0/2510.24.1.1 – 10.24.1.12610.24.1.127
410.24.1.128/2510.24.1.129 – 10.24.1.25410.24.1.255
510.24.2.0/2510.24.2.1 – 10.24.2.12610.24.2.127
610.24.2.128/2510.24.2.129 – 10.24.2.25410.24.2.255
710.24.3.0/2510.24.3.1 – 10.24.3.12610.24.3.127
810.24.3.128/2510.24.3.129 – 10.24.3.25410.24.3.255
910.24.4.0/2510.24.4.1 – 10.24.4.12610.24.4.127
1010.24.4.128/2510.24.4.129 – 10.24.4.25410.24.4.255
1110.24.5.0/2510.24.5.1 – 10.24.5.12610.24.5.127
1210.24.5.128/2510.24.5.129 – 10.24.5.25410.24.5.255
1310.24.6.0/2510.24.6.1 – 10.24.6.12610.24.6.127
1410.24.6.128/2510.24.6.129 – 10.24.6.25410.24.6.255
1510.24.7.0/2510.24.7.1 – 10.24.7.12610.24.7.127
1610.24.7.128/2510.24.7.129 – 10.24.7.25410.24.7.255
1710.24.8.0/2510.24.8.1 – 10.24.8.12610.24.8.127
1810.24.8.128/2510.24.8.129 – 10.24.8.25410.24.8.255
1910.24.9.0/2510.24.9.1 – 10.24.9.12610.24.9.127
2010.24.9.128/2510.24.9.129 – 10.24.9.25410.24.9.255
2110.24.10.0/2510.24.10.1 – 10.24.10.12610.24.10.127
2210.24.10.128/2510.24.10.129 – 10.24.10.25410.24.10.255
2310.24.11.0/2510.24.11.1 – 10.24.11.12610.24.11.127
2410.24.11.128/2510.24.11.129 – 10.24.11.25410.24.11.255
2510.24.12.0/2510.24.12.1 – 10.24.12.12610.24.12.127
2610.24.12.128/2510.24.12.129 – 10.24.12.25410.24.12.255
2710.24.13.0/2510.24.13.1 – 10.24.13.12610.24.13.127
2810.24.13.128/2510.24.13.129 – 10.24.13.25410.24.13.255
2910.24.14.0/2510.24.14.1 – 10.24.14.12610.24.14.127
3010.24.14.128/2510.24.14.129 – 10.24.14.25410.24.14.255
3110.24.15.0/2510.24.15.1 – 10.24.15.12610.24.15.127
3210.24.15.128/2510.24.15.129 – 10.24.15.25410.24.15.255
3310.24.16.0/2510.24.16.1 – 10.24.16.12610.24.16.127
3410.24.16.128/2510.24.16.129 – 10.24.16.25410.24.16.255
3510.24.17.0/2510.24.17.1 – 10.24.17.12610.24.17.127
3610.24.17.128/2510.24.17.129 – 10.24.17.25410.24.17.255
3710.24.18.0/2510.24.18.1 – 10.24.18.12610.24.18.127
3810.24.18.128/2510.24.18.129 – 10.24.18.25410.24.18.255
3910.24.19.0/2510.24.19.1 – 10.24.19.12610.24.19.127
4010.24.19.128/2510.24.19.129 – 10.24.19.25410.24.19.255
4110.24.20.0/2510.24.20.1 – 10.24.20.12610.24.20.127
4210.24.20.128/2510.24.20.129 – 10.24.20.25410.24.20.255
4310.24.21.0/2510.24.21.1 – 10.24.21.12610.24.21.127
4410.24.21.128/2510.24.21.129 – 10.24.21.25410.24.21.255
4510.24.22.0/2510.24.22.1 – 10.24.22.12610.24.22.127
4610.24.22.128/2510.24.22.129 – 10.24.22.25410.24.22.255
4710.24.23.0/2510.24.23.1 – 10.24.23.12610.24.23.127
4810.24.23.128/2510.24.23.129 – 10.24.23.25410.24.23.255
4910.24.24.0/2510.24.24.1 – 10.24.24.12610.24.24.127
5010.24.24.128/2510.24.24.129 – 10.24.24.25410.24.24.255
5110.24.25.0/2510.24.25.1 – 10.24.25.12610.24.25.127
5210.24.25.128/2510.24.25.129 – 10.24.25.25410.24.25.255
5310.24.26.0/2510.24.26.1 – 10.24.26.12610.24.26.127
5410.24.26.128/2510.24.26.129 – 10.24.26.25410.24.26.255
5510.24.27.0/2510.24.27.1 – 10.24.27.12610.24.27.127
5610.24.27.128/2510.24.27.129 – 10.24.27.25410.24.27.255
5710.24.28.0/2510.24.28.1 – 10.24.28.12610.24.28.127
5810.24.28.128/2510.24.28.129 – 10.24.28.25410.24.28.255
5910.24.29.0/2510.24.29.1 – 10.24.29.12610.24.29.127
6010.24.29.128/2510.24.29.129 – 10.24.29.25410.24.29.255
6110.24.30.0/2510.24.30.1 – 10.24.30.12610.24.30.127
6210.24.30.128/2510.24.30.129 – 10.24.30.25410.24.30.255
6310.24.31.0/2510.24.31.1 – 10.24.31.12610.24.31.127
6410.24.31.128/2510.24.31.129 – 10.24.31.25410.24.31.255
6510.24.32.0/2510.24.32.1 – 10.24.32.12610.24.32.127
6610.24.32.128/2510.24.32.129 – 10.24.32.25410.24.32.255
6710.24.33.0/2510.24.33.1 – 10.24.33.12610.24.33.127
6810.24.33.128/2510.24.33.129 – 10.24.33.25410.24.33.255
6910.24.34.0/2510.24.34.1 – 10.24.34.12610.24.34.127
7010.24.34.128/2510.24.34.129 – 10.24.34.25410.24.34.255
7110.24.35.0/2510.24.35.1 – 10.24.35.12610.24.35.127
7210.24.35.128/2510.24.35.129 – 10.24.35.25410.24.35.255
7310.24.36.0/2510.24.36.1 – 10.24.36.12610.24.36.127
7410.24.36.128/2510.24.36.129 – 10.24.36.25410.24.36.255
7510.24.37.0/2510.24.37.1 – 10.24.37.12610.24.37.127
7610.24.37.128/2510.24.37.129 – 10.24.37.25410.24.37.255
7710.24.38.0/2510.24.38.1 – 10.24.38.12610.24.38.127
7810.24.38.128/2510.24.38.129 – 10.24.38.25410.24.38.255
7910.24.39.0/2510.24.39.1 – 10.24.39.12610.24.39.127
8010.24.39.128/2510.24.39.129 – 10.24.39.25410.24.39.255
8110.24.40.0/2510.24.40.1 – 10.24.40.12610.24.40.127
8210.24.40.128/2510.24.40.129 – 10.24.40.25410.24.40.255
8310.24.41.0/2510.24.41.1 – 10.24.41.12610.24.41.127
8410.24.41.128/2510.24.41.129 – 10.24.41.25410.24.41.255
8510.24.42.0/2510.24.42.1 – 10.24.42.12610.24.42.127
8610.24.42.128/2510.24.42.129 – 10.24.42.25410.24.42.255
8710.24.43.0/2510.24.43.1 – 10.24.43.12610.24.43.127
8810.24.43.128/2510.24.43.129 – 10.24.43.25410.24.43.255
8910.24.44.0/2510.24.44.1 – 10.24.44.12610.24.44.127
9010.24.44.128/2510.24.44.129 – 10.24.44.25410.24.44.255
9110.24.45.0/2510.24.45.1 – 10.24.45.12610.24.45.127
9210.24.45.128/2510.24.45.129 – 10.24.45.25410.24.45.255
9310.24.46.0/2510.24.46.1 – 10.24.46.12610.24.46.127
9410.24.46.128/2510.24.46.129 – 10.24.46.25410.24.46.255
9510.24.47.0/2510.24.47.1 – 10.24.47.12610.24.47.127
9610.24.47.128/2510.24.47.129 – 10.24.47.25410.24.47.255
9710.24.48.0/2510.24.48.1 – 10.24.48.12610.24.48.127
9810.24.48.128/2510.24.48.129 – 10.24.48.25410.24.48.255
9910.24.49.0/2510.24.49.1 – 10.24.49.12610.24.49.127
10010.24.49.128/2510.24.49.129 – 10.24.49.25410.24.49.255
10110.24.50.0/2510.24.50.1 – 10.24.50.12610.24.50.127
10210.24.50.128/2510.24.50.129 – 10.24.50.25410.24.50.255
10310.24.51.0/2510.24.51.1 – 10.24.51.12610.24.51.127
10410.24.51.128/2510.24.51.129 – 10.24.51.25410.24.51.255
10510.24.52.0/2510.24.52.1 – 10.24.52.12610.24.52.127
10610.24.52.128/2510.24.52.129 – 10.24.52.25410.24.52.255
10710.24.53.0/2510.24.53.1 – 10.24.53.12610.24.53.127
10810.24.53.128/2510.24.53.129 – 10.24.53.25410.24.53.255
10910.24.54.0/2510.24.54.1 – 10.24.54.12610.24.54.127
11010.24.54.128/2510.24.54.129 – 10.24.54.25410.24.54.255
11110.24.55.0/2510.24.55.1 – 10.24.55.12610.24.55.127
11210.24.55.128/2510.24.55.129 – 10.24.55.25410.24.55.255
11310.24.56.0/2510.24.56.1 – 10.24.56.12610.24.56.127
11410.24.56.128/2510.24.56.129 – 10.24.56.25410.24.56.255
11510.24.57.0/2510.24.57.1 – 10.24.57.12610.24.57.127
11610.24.57.128/2510.24.57.129 – 10.24.57.25410.24.57.255
11710.24.58.0/2510.24.58.1 – 10.24.58.12610.24.58.127
11810.24.58.128/2510.24.58.129 – 10.24.58.25410.24.58.255
11910.24.59.0/2510.24.59.1 – 10.24.59.12610.24.59.127
12010.24.59.128/2510.24.59.129 – 10.24.59.25410.24.59.255
12110.24.60.0/2510.24.60.1 – 10.24.60.12610.24.60.127
12210.24.60.128/2510.24.60.129 – 10.24.60.25410.24.60.255
12310.24.61.0/2510.24.61.1 – 10.24.61.12610.24.61.127
12410.24.61.128/2510.24.61.129 – 10.24.61.25410.24.61.255
12510.24.62.0/2510.24.62.1 – 10.24.62.12610.24.62.127
12610.24.62.128/2510.24.62.129 – 10.24.62.25410.24.62.255
12710.24.63.0/2510.24.63.1 – 10.24.63.12610.24.63.127
12810.24.63.128/2510.24.63.129 – 10.24.63.25410.24.63.255
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 →