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)10.97.0.0/18
network10.97.0.0/18
broadcast10.97.63.255
first host10.97.0.1
last host10.97.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.97.0.0/18
address00001010.01100001.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.01100001.00000000.00000000
broadcast00001010.01100001.00111111.11111111
green = network part, grey = host part
hex0x0a610000
decimal174129152
reverse dns0.0.97.10.in-addr.arpa
ipv4-mapped::ffff:a61:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.97.0.0/2510.97.0.1 – 10.97.0.12610.97.0.127
210.97.0.128/2510.97.0.129 – 10.97.0.25410.97.0.255
310.97.1.0/2510.97.1.1 – 10.97.1.12610.97.1.127
410.97.1.128/2510.97.1.129 – 10.97.1.25410.97.1.255
510.97.2.0/2510.97.2.1 – 10.97.2.12610.97.2.127
610.97.2.128/2510.97.2.129 – 10.97.2.25410.97.2.255
710.97.3.0/2510.97.3.1 – 10.97.3.12610.97.3.127
810.97.3.128/2510.97.3.129 – 10.97.3.25410.97.3.255
910.97.4.0/2510.97.4.1 – 10.97.4.12610.97.4.127
1010.97.4.128/2510.97.4.129 – 10.97.4.25410.97.4.255
1110.97.5.0/2510.97.5.1 – 10.97.5.12610.97.5.127
1210.97.5.128/2510.97.5.129 – 10.97.5.25410.97.5.255
1310.97.6.0/2510.97.6.1 – 10.97.6.12610.97.6.127
1410.97.6.128/2510.97.6.129 – 10.97.6.25410.97.6.255
1510.97.7.0/2510.97.7.1 – 10.97.7.12610.97.7.127
1610.97.7.128/2510.97.7.129 – 10.97.7.25410.97.7.255
1710.97.8.0/2510.97.8.1 – 10.97.8.12610.97.8.127
1810.97.8.128/2510.97.8.129 – 10.97.8.25410.97.8.255
1910.97.9.0/2510.97.9.1 – 10.97.9.12610.97.9.127
2010.97.9.128/2510.97.9.129 – 10.97.9.25410.97.9.255
2110.97.10.0/2510.97.10.1 – 10.97.10.12610.97.10.127
2210.97.10.128/2510.97.10.129 – 10.97.10.25410.97.10.255
2310.97.11.0/2510.97.11.1 – 10.97.11.12610.97.11.127
2410.97.11.128/2510.97.11.129 – 10.97.11.25410.97.11.255
2510.97.12.0/2510.97.12.1 – 10.97.12.12610.97.12.127
2610.97.12.128/2510.97.12.129 – 10.97.12.25410.97.12.255
2710.97.13.0/2510.97.13.1 – 10.97.13.12610.97.13.127
2810.97.13.128/2510.97.13.129 – 10.97.13.25410.97.13.255
2910.97.14.0/2510.97.14.1 – 10.97.14.12610.97.14.127
3010.97.14.128/2510.97.14.129 – 10.97.14.25410.97.14.255
3110.97.15.0/2510.97.15.1 – 10.97.15.12610.97.15.127
3210.97.15.128/2510.97.15.129 – 10.97.15.25410.97.15.255
3310.97.16.0/2510.97.16.1 – 10.97.16.12610.97.16.127
3410.97.16.128/2510.97.16.129 – 10.97.16.25410.97.16.255
3510.97.17.0/2510.97.17.1 – 10.97.17.12610.97.17.127
3610.97.17.128/2510.97.17.129 – 10.97.17.25410.97.17.255
3710.97.18.0/2510.97.18.1 – 10.97.18.12610.97.18.127
3810.97.18.128/2510.97.18.129 – 10.97.18.25410.97.18.255
3910.97.19.0/2510.97.19.1 – 10.97.19.12610.97.19.127
4010.97.19.128/2510.97.19.129 – 10.97.19.25410.97.19.255
4110.97.20.0/2510.97.20.1 – 10.97.20.12610.97.20.127
4210.97.20.128/2510.97.20.129 – 10.97.20.25410.97.20.255
4310.97.21.0/2510.97.21.1 – 10.97.21.12610.97.21.127
4410.97.21.128/2510.97.21.129 – 10.97.21.25410.97.21.255
4510.97.22.0/2510.97.22.1 – 10.97.22.12610.97.22.127
4610.97.22.128/2510.97.22.129 – 10.97.22.25410.97.22.255
4710.97.23.0/2510.97.23.1 – 10.97.23.12610.97.23.127
4810.97.23.128/2510.97.23.129 – 10.97.23.25410.97.23.255
4910.97.24.0/2510.97.24.1 – 10.97.24.12610.97.24.127
5010.97.24.128/2510.97.24.129 – 10.97.24.25410.97.24.255
5110.97.25.0/2510.97.25.1 – 10.97.25.12610.97.25.127
5210.97.25.128/2510.97.25.129 – 10.97.25.25410.97.25.255
5310.97.26.0/2510.97.26.1 – 10.97.26.12610.97.26.127
5410.97.26.128/2510.97.26.129 – 10.97.26.25410.97.26.255
5510.97.27.0/2510.97.27.1 – 10.97.27.12610.97.27.127
5610.97.27.128/2510.97.27.129 – 10.97.27.25410.97.27.255
5710.97.28.0/2510.97.28.1 – 10.97.28.12610.97.28.127
5810.97.28.128/2510.97.28.129 – 10.97.28.25410.97.28.255
5910.97.29.0/2510.97.29.1 – 10.97.29.12610.97.29.127
6010.97.29.128/2510.97.29.129 – 10.97.29.25410.97.29.255
6110.97.30.0/2510.97.30.1 – 10.97.30.12610.97.30.127
6210.97.30.128/2510.97.30.129 – 10.97.30.25410.97.30.255
6310.97.31.0/2510.97.31.1 – 10.97.31.12610.97.31.127
6410.97.31.128/2510.97.31.129 – 10.97.31.25410.97.31.255
6510.97.32.0/2510.97.32.1 – 10.97.32.12610.97.32.127
6610.97.32.128/2510.97.32.129 – 10.97.32.25410.97.32.255
6710.97.33.0/2510.97.33.1 – 10.97.33.12610.97.33.127
6810.97.33.128/2510.97.33.129 – 10.97.33.25410.97.33.255
6910.97.34.0/2510.97.34.1 – 10.97.34.12610.97.34.127
7010.97.34.128/2510.97.34.129 – 10.97.34.25410.97.34.255
7110.97.35.0/2510.97.35.1 – 10.97.35.12610.97.35.127
7210.97.35.128/2510.97.35.129 – 10.97.35.25410.97.35.255
7310.97.36.0/2510.97.36.1 – 10.97.36.12610.97.36.127
7410.97.36.128/2510.97.36.129 – 10.97.36.25410.97.36.255
7510.97.37.0/2510.97.37.1 – 10.97.37.12610.97.37.127
7610.97.37.128/2510.97.37.129 – 10.97.37.25410.97.37.255
7710.97.38.0/2510.97.38.1 – 10.97.38.12610.97.38.127
7810.97.38.128/2510.97.38.129 – 10.97.38.25410.97.38.255
7910.97.39.0/2510.97.39.1 – 10.97.39.12610.97.39.127
8010.97.39.128/2510.97.39.129 – 10.97.39.25410.97.39.255
8110.97.40.0/2510.97.40.1 – 10.97.40.12610.97.40.127
8210.97.40.128/2510.97.40.129 – 10.97.40.25410.97.40.255
8310.97.41.0/2510.97.41.1 – 10.97.41.12610.97.41.127
8410.97.41.128/2510.97.41.129 – 10.97.41.25410.97.41.255
8510.97.42.0/2510.97.42.1 – 10.97.42.12610.97.42.127
8610.97.42.128/2510.97.42.129 – 10.97.42.25410.97.42.255
8710.97.43.0/2510.97.43.1 – 10.97.43.12610.97.43.127
8810.97.43.128/2510.97.43.129 – 10.97.43.25410.97.43.255
8910.97.44.0/2510.97.44.1 – 10.97.44.12610.97.44.127
9010.97.44.128/2510.97.44.129 – 10.97.44.25410.97.44.255
9110.97.45.0/2510.97.45.1 – 10.97.45.12610.97.45.127
9210.97.45.128/2510.97.45.129 – 10.97.45.25410.97.45.255
9310.97.46.0/2510.97.46.1 – 10.97.46.12610.97.46.127
9410.97.46.128/2510.97.46.129 – 10.97.46.25410.97.46.255
9510.97.47.0/2510.97.47.1 – 10.97.47.12610.97.47.127
9610.97.47.128/2510.97.47.129 – 10.97.47.25410.97.47.255
9710.97.48.0/2510.97.48.1 – 10.97.48.12610.97.48.127
9810.97.48.128/2510.97.48.129 – 10.97.48.25410.97.48.255
9910.97.49.0/2510.97.49.1 – 10.97.49.12610.97.49.127
10010.97.49.128/2510.97.49.129 – 10.97.49.25410.97.49.255
10110.97.50.0/2510.97.50.1 – 10.97.50.12610.97.50.127
10210.97.50.128/2510.97.50.129 – 10.97.50.25410.97.50.255
10310.97.51.0/2510.97.51.1 – 10.97.51.12610.97.51.127
10410.97.51.128/2510.97.51.129 – 10.97.51.25410.97.51.255
10510.97.52.0/2510.97.52.1 – 10.97.52.12610.97.52.127
10610.97.52.128/2510.97.52.129 – 10.97.52.25410.97.52.255
10710.97.53.0/2510.97.53.1 – 10.97.53.12610.97.53.127
10810.97.53.128/2510.97.53.129 – 10.97.53.25410.97.53.255
10910.97.54.0/2510.97.54.1 – 10.97.54.12610.97.54.127
11010.97.54.128/2510.97.54.129 – 10.97.54.25410.97.54.255
11110.97.55.0/2510.97.55.1 – 10.97.55.12610.97.55.127
11210.97.55.128/2510.97.55.129 – 10.97.55.25410.97.55.255
11310.97.56.0/2510.97.56.1 – 10.97.56.12610.97.56.127
11410.97.56.128/2510.97.56.129 – 10.97.56.25410.97.56.255
11510.97.57.0/2510.97.57.1 – 10.97.57.12610.97.57.127
11610.97.57.128/2510.97.57.129 – 10.97.57.25410.97.57.255
11710.97.58.0/2510.97.58.1 – 10.97.58.12610.97.58.127
11810.97.58.128/2510.97.58.129 – 10.97.58.25410.97.58.255
11910.97.59.0/2510.97.59.1 – 10.97.59.12610.97.59.127
12010.97.59.128/2510.97.59.129 – 10.97.59.25410.97.59.255
12110.97.60.0/2510.97.60.1 – 10.97.60.12610.97.60.127
12210.97.60.128/2510.97.60.129 – 10.97.60.25410.97.60.255
12310.97.61.0/2510.97.61.1 – 10.97.61.12610.97.61.127
12410.97.61.128/2510.97.61.129 – 10.97.61.25410.97.61.255
12510.97.62.0/2510.97.62.1 – 10.97.62.12610.97.62.127
12610.97.62.128/2510.97.62.129 – 10.97.62.25410.97.62.255
12710.97.63.0/2510.97.63.1 – 10.97.63.12610.97.63.127
12810.97.63.128/2510.97.63.129 – 10.97.63.25410.97.63.255
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 →