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)10.232.64.0/18
network10.232.64.0/18
broadcast10.232.127.255
first host10.232.64.1
last host10.232.127.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.232.64.0/18
address00001010.11101000.01000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.11101000.01000000.00000000
broadcast00001010.11101000.01111111.11111111
green = network part, grey = host part
hex0x0ae84000
decimal182992896
reverse dns0.64.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:4000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.232.64.0/2510.232.64.1 – 10.232.64.12610.232.64.127
210.232.64.128/2510.232.64.129 – 10.232.64.25410.232.64.255
310.232.65.0/2510.232.65.1 – 10.232.65.12610.232.65.127
410.232.65.128/2510.232.65.129 – 10.232.65.25410.232.65.255
510.232.66.0/2510.232.66.1 – 10.232.66.12610.232.66.127
610.232.66.128/2510.232.66.129 – 10.232.66.25410.232.66.255
710.232.67.0/2510.232.67.1 – 10.232.67.12610.232.67.127
810.232.67.128/2510.232.67.129 – 10.232.67.25410.232.67.255
910.232.68.0/2510.232.68.1 – 10.232.68.12610.232.68.127
1010.232.68.128/2510.232.68.129 – 10.232.68.25410.232.68.255
1110.232.69.0/2510.232.69.1 – 10.232.69.12610.232.69.127
1210.232.69.128/2510.232.69.129 – 10.232.69.25410.232.69.255
1310.232.70.0/2510.232.70.1 – 10.232.70.12610.232.70.127
1410.232.70.128/2510.232.70.129 – 10.232.70.25410.232.70.255
1510.232.71.0/2510.232.71.1 – 10.232.71.12610.232.71.127
1610.232.71.128/2510.232.71.129 – 10.232.71.25410.232.71.255
1710.232.72.0/2510.232.72.1 – 10.232.72.12610.232.72.127
1810.232.72.128/2510.232.72.129 – 10.232.72.25410.232.72.255
1910.232.73.0/2510.232.73.1 – 10.232.73.12610.232.73.127
2010.232.73.128/2510.232.73.129 – 10.232.73.25410.232.73.255
2110.232.74.0/2510.232.74.1 – 10.232.74.12610.232.74.127
2210.232.74.128/2510.232.74.129 – 10.232.74.25410.232.74.255
2310.232.75.0/2510.232.75.1 – 10.232.75.12610.232.75.127
2410.232.75.128/2510.232.75.129 – 10.232.75.25410.232.75.255
2510.232.76.0/2510.232.76.1 – 10.232.76.12610.232.76.127
2610.232.76.128/2510.232.76.129 – 10.232.76.25410.232.76.255
2710.232.77.0/2510.232.77.1 – 10.232.77.12610.232.77.127
2810.232.77.128/2510.232.77.129 – 10.232.77.25410.232.77.255
2910.232.78.0/2510.232.78.1 – 10.232.78.12610.232.78.127
3010.232.78.128/2510.232.78.129 – 10.232.78.25410.232.78.255
3110.232.79.0/2510.232.79.1 – 10.232.79.12610.232.79.127
3210.232.79.128/2510.232.79.129 – 10.232.79.25410.232.79.255
3310.232.80.0/2510.232.80.1 – 10.232.80.12610.232.80.127
3410.232.80.128/2510.232.80.129 – 10.232.80.25410.232.80.255
3510.232.81.0/2510.232.81.1 – 10.232.81.12610.232.81.127
3610.232.81.128/2510.232.81.129 – 10.232.81.25410.232.81.255
3710.232.82.0/2510.232.82.1 – 10.232.82.12610.232.82.127
3810.232.82.128/2510.232.82.129 – 10.232.82.25410.232.82.255
3910.232.83.0/2510.232.83.1 – 10.232.83.12610.232.83.127
4010.232.83.128/2510.232.83.129 – 10.232.83.25410.232.83.255
4110.232.84.0/2510.232.84.1 – 10.232.84.12610.232.84.127
4210.232.84.128/2510.232.84.129 – 10.232.84.25410.232.84.255
4310.232.85.0/2510.232.85.1 – 10.232.85.12610.232.85.127
4410.232.85.128/2510.232.85.129 – 10.232.85.25410.232.85.255
4510.232.86.0/2510.232.86.1 – 10.232.86.12610.232.86.127
4610.232.86.128/2510.232.86.129 – 10.232.86.25410.232.86.255
4710.232.87.0/2510.232.87.1 – 10.232.87.12610.232.87.127
4810.232.87.128/2510.232.87.129 – 10.232.87.25410.232.87.255
4910.232.88.0/2510.232.88.1 – 10.232.88.12610.232.88.127
5010.232.88.128/2510.232.88.129 – 10.232.88.25410.232.88.255
5110.232.89.0/2510.232.89.1 – 10.232.89.12610.232.89.127
5210.232.89.128/2510.232.89.129 – 10.232.89.25410.232.89.255
5310.232.90.0/2510.232.90.1 – 10.232.90.12610.232.90.127
5410.232.90.128/2510.232.90.129 – 10.232.90.25410.232.90.255
5510.232.91.0/2510.232.91.1 – 10.232.91.12610.232.91.127
5610.232.91.128/2510.232.91.129 – 10.232.91.25410.232.91.255
5710.232.92.0/2510.232.92.1 – 10.232.92.12610.232.92.127
5810.232.92.128/2510.232.92.129 – 10.232.92.25410.232.92.255
5910.232.93.0/2510.232.93.1 – 10.232.93.12610.232.93.127
6010.232.93.128/2510.232.93.129 – 10.232.93.25410.232.93.255
6110.232.94.0/2510.232.94.1 – 10.232.94.12610.232.94.127
6210.232.94.128/2510.232.94.129 – 10.232.94.25410.232.94.255
6310.232.95.0/2510.232.95.1 – 10.232.95.12610.232.95.127
6410.232.95.128/2510.232.95.129 – 10.232.95.25410.232.95.255
6510.232.96.0/2510.232.96.1 – 10.232.96.12610.232.96.127
6610.232.96.128/2510.232.96.129 – 10.232.96.25410.232.96.255
6710.232.97.0/2510.232.97.1 – 10.232.97.12610.232.97.127
6810.232.97.128/2510.232.97.129 – 10.232.97.25410.232.97.255
6910.232.98.0/2510.232.98.1 – 10.232.98.12610.232.98.127
7010.232.98.128/2510.232.98.129 – 10.232.98.25410.232.98.255
7110.232.99.0/2510.232.99.1 – 10.232.99.12610.232.99.127
7210.232.99.128/2510.232.99.129 – 10.232.99.25410.232.99.255
7310.232.100.0/2510.232.100.1 – 10.232.100.12610.232.100.127
7410.232.100.128/2510.232.100.129 – 10.232.100.25410.232.100.255
7510.232.101.0/2510.232.101.1 – 10.232.101.12610.232.101.127
7610.232.101.128/2510.232.101.129 – 10.232.101.25410.232.101.255
7710.232.102.0/2510.232.102.1 – 10.232.102.12610.232.102.127
7810.232.102.128/2510.232.102.129 – 10.232.102.25410.232.102.255
7910.232.103.0/2510.232.103.1 – 10.232.103.12610.232.103.127
8010.232.103.128/2510.232.103.129 – 10.232.103.25410.232.103.255
8110.232.104.0/2510.232.104.1 – 10.232.104.12610.232.104.127
8210.232.104.128/2510.232.104.129 – 10.232.104.25410.232.104.255
8310.232.105.0/2510.232.105.1 – 10.232.105.12610.232.105.127
8410.232.105.128/2510.232.105.129 – 10.232.105.25410.232.105.255
8510.232.106.0/2510.232.106.1 – 10.232.106.12610.232.106.127
8610.232.106.128/2510.232.106.129 – 10.232.106.25410.232.106.255
8710.232.107.0/2510.232.107.1 – 10.232.107.12610.232.107.127
8810.232.107.128/2510.232.107.129 – 10.232.107.25410.232.107.255
8910.232.108.0/2510.232.108.1 – 10.232.108.12610.232.108.127
9010.232.108.128/2510.232.108.129 – 10.232.108.25410.232.108.255
9110.232.109.0/2510.232.109.1 – 10.232.109.12610.232.109.127
9210.232.109.128/2510.232.109.129 – 10.232.109.25410.232.109.255
9310.232.110.0/2510.232.110.1 – 10.232.110.12610.232.110.127
9410.232.110.128/2510.232.110.129 – 10.232.110.25410.232.110.255
9510.232.111.0/2510.232.111.1 – 10.232.111.12610.232.111.127
9610.232.111.128/2510.232.111.129 – 10.232.111.25410.232.111.255
9710.232.112.0/2510.232.112.1 – 10.232.112.12610.232.112.127
9810.232.112.128/2510.232.112.129 – 10.232.112.25410.232.112.255
9910.232.113.0/2510.232.113.1 – 10.232.113.12610.232.113.127
10010.232.113.128/2510.232.113.129 – 10.232.113.25410.232.113.255
10110.232.114.0/2510.232.114.1 – 10.232.114.12610.232.114.127
10210.232.114.128/2510.232.114.129 – 10.232.114.25410.232.114.255
10310.232.115.0/2510.232.115.1 – 10.232.115.12610.232.115.127
10410.232.115.128/2510.232.115.129 – 10.232.115.25410.232.115.255
10510.232.116.0/2510.232.116.1 – 10.232.116.12610.232.116.127
10610.232.116.128/2510.232.116.129 – 10.232.116.25410.232.116.255
10710.232.117.0/2510.232.117.1 – 10.232.117.12610.232.117.127
10810.232.117.128/2510.232.117.129 – 10.232.117.25410.232.117.255
10910.232.118.0/2510.232.118.1 – 10.232.118.12610.232.118.127
11010.232.118.128/2510.232.118.129 – 10.232.118.25410.232.118.255
11110.232.119.0/2510.232.119.1 – 10.232.119.12610.232.119.127
11210.232.119.128/2510.232.119.129 – 10.232.119.25410.232.119.255
11310.232.120.0/2510.232.120.1 – 10.232.120.12610.232.120.127
11410.232.120.128/2510.232.120.129 – 10.232.120.25410.232.120.255
11510.232.121.0/2510.232.121.1 – 10.232.121.12610.232.121.127
11610.232.121.128/2510.232.121.129 – 10.232.121.25410.232.121.255
11710.232.122.0/2510.232.122.1 – 10.232.122.12610.232.122.127
11810.232.122.128/2510.232.122.129 – 10.232.122.25410.232.122.255
11910.232.123.0/2510.232.123.1 – 10.232.123.12610.232.123.127
12010.232.123.128/2510.232.123.129 – 10.232.123.25410.232.123.255
12110.232.124.0/2510.232.124.1 – 10.232.124.12610.232.124.127
12210.232.124.128/2510.232.124.129 – 10.232.124.25410.232.124.255
12310.232.125.0/2510.232.125.1 – 10.232.125.12610.232.125.127
12410.232.125.128/2510.232.125.129 – 10.232.125.25410.232.125.255
12510.232.126.0/2510.232.126.1 – 10.232.126.12610.232.126.127
12610.232.126.128/2510.232.126.129 – 10.232.126.25410.232.126.255
12710.232.127.0/2510.232.127.1 – 10.232.127.12610.232.127.127
12810.232.127.128/2510.232.127.129 – 10.232.127.25410.232.127.255
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 →