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)10.89.64.0/18
network10.89.64.0/18
broadcast10.89.127.255
first host10.89.64.1
last host10.89.127.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.89.64.0/18
address00001010.01011001.01000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.01011001.01000000.00000000
broadcast00001010.01011001.01111111.11111111
green = network part, grey = host part
hex0x0a594000
decimal173621248
reverse dns0.64.89.10.in-addr.arpa
ipv4-mapped::ffff:a59:4000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.89.64.0/2510.89.64.1 – 10.89.64.12610.89.64.127
210.89.64.128/2510.89.64.129 – 10.89.64.25410.89.64.255
310.89.65.0/2510.89.65.1 – 10.89.65.12610.89.65.127
410.89.65.128/2510.89.65.129 – 10.89.65.25410.89.65.255
510.89.66.0/2510.89.66.1 – 10.89.66.12610.89.66.127
610.89.66.128/2510.89.66.129 – 10.89.66.25410.89.66.255
710.89.67.0/2510.89.67.1 – 10.89.67.12610.89.67.127
810.89.67.128/2510.89.67.129 – 10.89.67.25410.89.67.255
910.89.68.0/2510.89.68.1 – 10.89.68.12610.89.68.127
1010.89.68.128/2510.89.68.129 – 10.89.68.25410.89.68.255
1110.89.69.0/2510.89.69.1 – 10.89.69.12610.89.69.127
1210.89.69.128/2510.89.69.129 – 10.89.69.25410.89.69.255
1310.89.70.0/2510.89.70.1 – 10.89.70.12610.89.70.127
1410.89.70.128/2510.89.70.129 – 10.89.70.25410.89.70.255
1510.89.71.0/2510.89.71.1 – 10.89.71.12610.89.71.127
1610.89.71.128/2510.89.71.129 – 10.89.71.25410.89.71.255
1710.89.72.0/2510.89.72.1 – 10.89.72.12610.89.72.127
1810.89.72.128/2510.89.72.129 – 10.89.72.25410.89.72.255
1910.89.73.0/2510.89.73.1 – 10.89.73.12610.89.73.127
2010.89.73.128/2510.89.73.129 – 10.89.73.25410.89.73.255
2110.89.74.0/2510.89.74.1 – 10.89.74.12610.89.74.127
2210.89.74.128/2510.89.74.129 – 10.89.74.25410.89.74.255
2310.89.75.0/2510.89.75.1 – 10.89.75.12610.89.75.127
2410.89.75.128/2510.89.75.129 – 10.89.75.25410.89.75.255
2510.89.76.0/2510.89.76.1 – 10.89.76.12610.89.76.127
2610.89.76.128/2510.89.76.129 – 10.89.76.25410.89.76.255
2710.89.77.0/2510.89.77.1 – 10.89.77.12610.89.77.127
2810.89.77.128/2510.89.77.129 – 10.89.77.25410.89.77.255
2910.89.78.0/2510.89.78.1 – 10.89.78.12610.89.78.127
3010.89.78.128/2510.89.78.129 – 10.89.78.25410.89.78.255
3110.89.79.0/2510.89.79.1 – 10.89.79.12610.89.79.127
3210.89.79.128/2510.89.79.129 – 10.89.79.25410.89.79.255
3310.89.80.0/2510.89.80.1 – 10.89.80.12610.89.80.127
3410.89.80.128/2510.89.80.129 – 10.89.80.25410.89.80.255
3510.89.81.0/2510.89.81.1 – 10.89.81.12610.89.81.127
3610.89.81.128/2510.89.81.129 – 10.89.81.25410.89.81.255
3710.89.82.0/2510.89.82.1 – 10.89.82.12610.89.82.127
3810.89.82.128/2510.89.82.129 – 10.89.82.25410.89.82.255
3910.89.83.0/2510.89.83.1 – 10.89.83.12610.89.83.127
4010.89.83.128/2510.89.83.129 – 10.89.83.25410.89.83.255
4110.89.84.0/2510.89.84.1 – 10.89.84.12610.89.84.127
4210.89.84.128/2510.89.84.129 – 10.89.84.25410.89.84.255
4310.89.85.0/2510.89.85.1 – 10.89.85.12610.89.85.127
4410.89.85.128/2510.89.85.129 – 10.89.85.25410.89.85.255
4510.89.86.0/2510.89.86.1 – 10.89.86.12610.89.86.127
4610.89.86.128/2510.89.86.129 – 10.89.86.25410.89.86.255
4710.89.87.0/2510.89.87.1 – 10.89.87.12610.89.87.127
4810.89.87.128/2510.89.87.129 – 10.89.87.25410.89.87.255
4910.89.88.0/2510.89.88.1 – 10.89.88.12610.89.88.127
5010.89.88.128/2510.89.88.129 – 10.89.88.25410.89.88.255
5110.89.89.0/2510.89.89.1 – 10.89.89.12610.89.89.127
5210.89.89.128/2510.89.89.129 – 10.89.89.25410.89.89.255
5310.89.90.0/2510.89.90.1 – 10.89.90.12610.89.90.127
5410.89.90.128/2510.89.90.129 – 10.89.90.25410.89.90.255
5510.89.91.0/2510.89.91.1 – 10.89.91.12610.89.91.127
5610.89.91.128/2510.89.91.129 – 10.89.91.25410.89.91.255
5710.89.92.0/2510.89.92.1 – 10.89.92.12610.89.92.127
5810.89.92.128/2510.89.92.129 – 10.89.92.25410.89.92.255
5910.89.93.0/2510.89.93.1 – 10.89.93.12610.89.93.127
6010.89.93.128/2510.89.93.129 – 10.89.93.25410.89.93.255
6110.89.94.0/2510.89.94.1 – 10.89.94.12610.89.94.127
6210.89.94.128/2510.89.94.129 – 10.89.94.25410.89.94.255
6310.89.95.0/2510.89.95.1 – 10.89.95.12610.89.95.127
6410.89.95.128/2510.89.95.129 – 10.89.95.25410.89.95.255
6510.89.96.0/2510.89.96.1 – 10.89.96.12610.89.96.127
6610.89.96.128/2510.89.96.129 – 10.89.96.25410.89.96.255
6710.89.97.0/2510.89.97.1 – 10.89.97.12610.89.97.127
6810.89.97.128/2510.89.97.129 – 10.89.97.25410.89.97.255
6910.89.98.0/2510.89.98.1 – 10.89.98.12610.89.98.127
7010.89.98.128/2510.89.98.129 – 10.89.98.25410.89.98.255
7110.89.99.0/2510.89.99.1 – 10.89.99.12610.89.99.127
7210.89.99.128/2510.89.99.129 – 10.89.99.25410.89.99.255
7310.89.100.0/2510.89.100.1 – 10.89.100.12610.89.100.127
7410.89.100.128/2510.89.100.129 – 10.89.100.25410.89.100.255
7510.89.101.0/2510.89.101.1 – 10.89.101.12610.89.101.127
7610.89.101.128/2510.89.101.129 – 10.89.101.25410.89.101.255
7710.89.102.0/2510.89.102.1 – 10.89.102.12610.89.102.127
7810.89.102.128/2510.89.102.129 – 10.89.102.25410.89.102.255
7910.89.103.0/2510.89.103.1 – 10.89.103.12610.89.103.127
8010.89.103.128/2510.89.103.129 – 10.89.103.25410.89.103.255
8110.89.104.0/2510.89.104.1 – 10.89.104.12610.89.104.127
8210.89.104.128/2510.89.104.129 – 10.89.104.25410.89.104.255
8310.89.105.0/2510.89.105.1 – 10.89.105.12610.89.105.127
8410.89.105.128/2510.89.105.129 – 10.89.105.25410.89.105.255
8510.89.106.0/2510.89.106.1 – 10.89.106.12610.89.106.127
8610.89.106.128/2510.89.106.129 – 10.89.106.25410.89.106.255
8710.89.107.0/2510.89.107.1 – 10.89.107.12610.89.107.127
8810.89.107.128/2510.89.107.129 – 10.89.107.25410.89.107.255
8910.89.108.0/2510.89.108.1 – 10.89.108.12610.89.108.127
9010.89.108.128/2510.89.108.129 – 10.89.108.25410.89.108.255
9110.89.109.0/2510.89.109.1 – 10.89.109.12610.89.109.127
9210.89.109.128/2510.89.109.129 – 10.89.109.25410.89.109.255
9310.89.110.0/2510.89.110.1 – 10.89.110.12610.89.110.127
9410.89.110.128/2510.89.110.129 – 10.89.110.25410.89.110.255
9510.89.111.0/2510.89.111.1 – 10.89.111.12610.89.111.127
9610.89.111.128/2510.89.111.129 – 10.89.111.25410.89.111.255
9710.89.112.0/2510.89.112.1 – 10.89.112.12610.89.112.127
9810.89.112.128/2510.89.112.129 – 10.89.112.25410.89.112.255
9910.89.113.0/2510.89.113.1 – 10.89.113.12610.89.113.127
10010.89.113.128/2510.89.113.129 – 10.89.113.25410.89.113.255
10110.89.114.0/2510.89.114.1 – 10.89.114.12610.89.114.127
10210.89.114.128/2510.89.114.129 – 10.89.114.25410.89.114.255
10310.89.115.0/2510.89.115.1 – 10.89.115.12610.89.115.127
10410.89.115.128/2510.89.115.129 – 10.89.115.25410.89.115.255
10510.89.116.0/2510.89.116.1 – 10.89.116.12610.89.116.127
10610.89.116.128/2510.89.116.129 – 10.89.116.25410.89.116.255
10710.89.117.0/2510.89.117.1 – 10.89.117.12610.89.117.127
10810.89.117.128/2510.89.117.129 – 10.89.117.25410.89.117.255
10910.89.118.0/2510.89.118.1 – 10.89.118.12610.89.118.127
11010.89.118.128/2510.89.118.129 – 10.89.118.25410.89.118.255
11110.89.119.0/2510.89.119.1 – 10.89.119.12610.89.119.127
11210.89.119.128/2510.89.119.129 – 10.89.119.25410.89.119.255
11310.89.120.0/2510.89.120.1 – 10.89.120.12610.89.120.127
11410.89.120.128/2510.89.120.129 – 10.89.120.25410.89.120.255
11510.89.121.0/2510.89.121.1 – 10.89.121.12610.89.121.127
11610.89.121.128/2510.89.121.129 – 10.89.121.25410.89.121.255
11710.89.122.0/2510.89.122.1 – 10.89.122.12610.89.122.127
11810.89.122.128/2510.89.122.129 – 10.89.122.25410.89.122.255
11910.89.123.0/2510.89.123.1 – 10.89.123.12610.89.123.127
12010.89.123.128/2510.89.123.129 – 10.89.123.25410.89.123.255
12110.89.124.0/2510.89.124.1 – 10.89.124.12610.89.124.127
12210.89.124.128/2510.89.124.129 – 10.89.124.25410.89.124.255
12310.89.125.0/2510.89.125.1 – 10.89.125.12610.89.125.127
12410.89.125.128/2510.89.125.129 – 10.89.125.25410.89.125.255
12510.89.126.0/2510.89.126.1 – 10.89.126.12610.89.126.127
12610.89.126.128/2510.89.126.129 – 10.89.126.25410.89.126.255
12710.89.127.0/2510.89.127.1 – 10.89.127.12610.89.127.127
12810.89.127.128/2510.89.127.129 – 10.89.127.25410.89.127.255
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 →