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)10.13.0.0/18
network10.13.0.0/18
broadcast10.13.63.255
first host10.13.0.1
last host10.13.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.13.0.0/18
address00001010.00001101.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00001101.00000000.00000000
broadcast00001010.00001101.00111111.11111111
green = network part, grey = host part
hex0x0a0d0000
decimal168624128
reverse dns0.0.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.13.0.0/2510.13.0.1 – 10.13.0.12610.13.0.127
210.13.0.128/2510.13.0.129 – 10.13.0.25410.13.0.255
310.13.1.0/2510.13.1.1 – 10.13.1.12610.13.1.127
410.13.1.128/2510.13.1.129 – 10.13.1.25410.13.1.255
510.13.2.0/2510.13.2.1 – 10.13.2.12610.13.2.127
610.13.2.128/2510.13.2.129 – 10.13.2.25410.13.2.255
710.13.3.0/2510.13.3.1 – 10.13.3.12610.13.3.127
810.13.3.128/2510.13.3.129 – 10.13.3.25410.13.3.255
910.13.4.0/2510.13.4.1 – 10.13.4.12610.13.4.127
1010.13.4.128/2510.13.4.129 – 10.13.4.25410.13.4.255
1110.13.5.0/2510.13.5.1 – 10.13.5.12610.13.5.127
1210.13.5.128/2510.13.5.129 – 10.13.5.25410.13.5.255
1310.13.6.0/2510.13.6.1 – 10.13.6.12610.13.6.127
1410.13.6.128/2510.13.6.129 – 10.13.6.25410.13.6.255
1510.13.7.0/2510.13.7.1 – 10.13.7.12610.13.7.127
1610.13.7.128/2510.13.7.129 – 10.13.7.25410.13.7.255
1710.13.8.0/2510.13.8.1 – 10.13.8.12610.13.8.127
1810.13.8.128/2510.13.8.129 – 10.13.8.25410.13.8.255
1910.13.9.0/2510.13.9.1 – 10.13.9.12610.13.9.127
2010.13.9.128/2510.13.9.129 – 10.13.9.25410.13.9.255
2110.13.10.0/2510.13.10.1 – 10.13.10.12610.13.10.127
2210.13.10.128/2510.13.10.129 – 10.13.10.25410.13.10.255
2310.13.11.0/2510.13.11.1 – 10.13.11.12610.13.11.127
2410.13.11.128/2510.13.11.129 – 10.13.11.25410.13.11.255
2510.13.12.0/2510.13.12.1 – 10.13.12.12610.13.12.127
2610.13.12.128/2510.13.12.129 – 10.13.12.25410.13.12.255
2710.13.13.0/2510.13.13.1 – 10.13.13.12610.13.13.127
2810.13.13.128/2510.13.13.129 – 10.13.13.25410.13.13.255
2910.13.14.0/2510.13.14.1 – 10.13.14.12610.13.14.127
3010.13.14.128/2510.13.14.129 – 10.13.14.25410.13.14.255
3110.13.15.0/2510.13.15.1 – 10.13.15.12610.13.15.127
3210.13.15.128/2510.13.15.129 – 10.13.15.25410.13.15.255
3310.13.16.0/2510.13.16.1 – 10.13.16.12610.13.16.127
3410.13.16.128/2510.13.16.129 – 10.13.16.25410.13.16.255
3510.13.17.0/2510.13.17.1 – 10.13.17.12610.13.17.127
3610.13.17.128/2510.13.17.129 – 10.13.17.25410.13.17.255
3710.13.18.0/2510.13.18.1 – 10.13.18.12610.13.18.127
3810.13.18.128/2510.13.18.129 – 10.13.18.25410.13.18.255
3910.13.19.0/2510.13.19.1 – 10.13.19.12610.13.19.127
4010.13.19.128/2510.13.19.129 – 10.13.19.25410.13.19.255
4110.13.20.0/2510.13.20.1 – 10.13.20.12610.13.20.127
4210.13.20.128/2510.13.20.129 – 10.13.20.25410.13.20.255
4310.13.21.0/2510.13.21.1 – 10.13.21.12610.13.21.127
4410.13.21.128/2510.13.21.129 – 10.13.21.25410.13.21.255
4510.13.22.0/2510.13.22.1 – 10.13.22.12610.13.22.127
4610.13.22.128/2510.13.22.129 – 10.13.22.25410.13.22.255
4710.13.23.0/2510.13.23.1 – 10.13.23.12610.13.23.127
4810.13.23.128/2510.13.23.129 – 10.13.23.25410.13.23.255
4910.13.24.0/2510.13.24.1 – 10.13.24.12610.13.24.127
5010.13.24.128/2510.13.24.129 – 10.13.24.25410.13.24.255
5110.13.25.0/2510.13.25.1 – 10.13.25.12610.13.25.127
5210.13.25.128/2510.13.25.129 – 10.13.25.25410.13.25.255
5310.13.26.0/2510.13.26.1 – 10.13.26.12610.13.26.127
5410.13.26.128/2510.13.26.129 – 10.13.26.25410.13.26.255
5510.13.27.0/2510.13.27.1 – 10.13.27.12610.13.27.127
5610.13.27.128/2510.13.27.129 – 10.13.27.25410.13.27.255
5710.13.28.0/2510.13.28.1 – 10.13.28.12610.13.28.127
5810.13.28.128/2510.13.28.129 – 10.13.28.25410.13.28.255
5910.13.29.0/2510.13.29.1 – 10.13.29.12610.13.29.127
6010.13.29.128/2510.13.29.129 – 10.13.29.25410.13.29.255
6110.13.30.0/2510.13.30.1 – 10.13.30.12610.13.30.127
6210.13.30.128/2510.13.30.129 – 10.13.30.25410.13.30.255
6310.13.31.0/2510.13.31.1 – 10.13.31.12610.13.31.127
6410.13.31.128/2510.13.31.129 – 10.13.31.25410.13.31.255
6510.13.32.0/2510.13.32.1 – 10.13.32.12610.13.32.127
6610.13.32.128/2510.13.32.129 – 10.13.32.25410.13.32.255
6710.13.33.0/2510.13.33.1 – 10.13.33.12610.13.33.127
6810.13.33.128/2510.13.33.129 – 10.13.33.25410.13.33.255
6910.13.34.0/2510.13.34.1 – 10.13.34.12610.13.34.127
7010.13.34.128/2510.13.34.129 – 10.13.34.25410.13.34.255
7110.13.35.0/2510.13.35.1 – 10.13.35.12610.13.35.127
7210.13.35.128/2510.13.35.129 – 10.13.35.25410.13.35.255
7310.13.36.0/2510.13.36.1 – 10.13.36.12610.13.36.127
7410.13.36.128/2510.13.36.129 – 10.13.36.25410.13.36.255
7510.13.37.0/2510.13.37.1 – 10.13.37.12610.13.37.127
7610.13.37.128/2510.13.37.129 – 10.13.37.25410.13.37.255
7710.13.38.0/2510.13.38.1 – 10.13.38.12610.13.38.127
7810.13.38.128/2510.13.38.129 – 10.13.38.25410.13.38.255
7910.13.39.0/2510.13.39.1 – 10.13.39.12610.13.39.127
8010.13.39.128/2510.13.39.129 – 10.13.39.25410.13.39.255
8110.13.40.0/2510.13.40.1 – 10.13.40.12610.13.40.127
8210.13.40.128/2510.13.40.129 – 10.13.40.25410.13.40.255
8310.13.41.0/2510.13.41.1 – 10.13.41.12610.13.41.127
8410.13.41.128/2510.13.41.129 – 10.13.41.25410.13.41.255
8510.13.42.0/2510.13.42.1 – 10.13.42.12610.13.42.127
8610.13.42.128/2510.13.42.129 – 10.13.42.25410.13.42.255
8710.13.43.0/2510.13.43.1 – 10.13.43.12610.13.43.127
8810.13.43.128/2510.13.43.129 – 10.13.43.25410.13.43.255
8910.13.44.0/2510.13.44.1 – 10.13.44.12610.13.44.127
9010.13.44.128/2510.13.44.129 – 10.13.44.25410.13.44.255
9110.13.45.0/2510.13.45.1 – 10.13.45.12610.13.45.127
9210.13.45.128/2510.13.45.129 – 10.13.45.25410.13.45.255
9310.13.46.0/2510.13.46.1 – 10.13.46.12610.13.46.127
9410.13.46.128/2510.13.46.129 – 10.13.46.25410.13.46.255
9510.13.47.0/2510.13.47.1 – 10.13.47.12610.13.47.127
9610.13.47.128/2510.13.47.129 – 10.13.47.25410.13.47.255
9710.13.48.0/2510.13.48.1 – 10.13.48.12610.13.48.127
9810.13.48.128/2510.13.48.129 – 10.13.48.25410.13.48.255
9910.13.49.0/2510.13.49.1 – 10.13.49.12610.13.49.127
10010.13.49.128/2510.13.49.129 – 10.13.49.25410.13.49.255
10110.13.50.0/2510.13.50.1 – 10.13.50.12610.13.50.127
10210.13.50.128/2510.13.50.129 – 10.13.50.25410.13.50.255
10310.13.51.0/2510.13.51.1 – 10.13.51.12610.13.51.127
10410.13.51.128/2510.13.51.129 – 10.13.51.25410.13.51.255
10510.13.52.0/2510.13.52.1 – 10.13.52.12610.13.52.127
10610.13.52.128/2510.13.52.129 – 10.13.52.25410.13.52.255
10710.13.53.0/2510.13.53.1 – 10.13.53.12610.13.53.127
10810.13.53.128/2510.13.53.129 – 10.13.53.25410.13.53.255
10910.13.54.0/2510.13.54.1 – 10.13.54.12610.13.54.127
11010.13.54.128/2510.13.54.129 – 10.13.54.25410.13.54.255
11110.13.55.0/2510.13.55.1 – 10.13.55.12610.13.55.127
11210.13.55.128/2510.13.55.129 – 10.13.55.25410.13.55.255
11310.13.56.0/2510.13.56.1 – 10.13.56.12610.13.56.127
11410.13.56.128/2510.13.56.129 – 10.13.56.25410.13.56.255
11510.13.57.0/2510.13.57.1 – 10.13.57.12610.13.57.127
11610.13.57.128/2510.13.57.129 – 10.13.57.25410.13.57.255
11710.13.58.0/2510.13.58.1 – 10.13.58.12610.13.58.127
11810.13.58.128/2510.13.58.129 – 10.13.58.25410.13.58.255
11910.13.59.0/2510.13.59.1 – 10.13.59.12610.13.59.127
12010.13.59.128/2510.13.59.129 – 10.13.59.25410.13.59.255
12110.13.60.0/2510.13.60.1 – 10.13.60.12610.13.60.127
12210.13.60.128/2510.13.60.129 – 10.13.60.25410.13.60.255
12310.13.61.0/2510.13.61.1 – 10.13.61.12610.13.61.127
12410.13.61.128/2510.13.61.129 – 10.13.61.25410.13.61.255
12510.13.62.0/2510.13.62.1 – 10.13.62.12610.13.62.127
12610.13.62.128/2510.13.62.129 – 10.13.62.25410.13.62.255
12710.13.63.0/2510.13.63.1 – 10.13.63.12610.13.63.127
12810.13.63.128/2510.13.63.129 – 10.13.63.25410.13.63.255
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 →