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)10.7.64.0/18
network10.7.64.0/18
broadcast10.7.127.255
first host10.7.64.1
last host10.7.127.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.7.64.0/18
address00001010.00000111.01000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00000111.01000000.00000000
broadcast00001010.00000111.01111111.11111111
green = network part, grey = host part
hex0x0a074000
decimal168247296
reverse dns0.64.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:4000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.64.0/2510.7.64.1 – 10.7.64.12610.7.64.127
210.7.64.128/2510.7.64.129 – 10.7.64.25410.7.64.255
310.7.65.0/2510.7.65.1 – 10.7.65.12610.7.65.127
410.7.65.128/2510.7.65.129 – 10.7.65.25410.7.65.255
510.7.66.0/2510.7.66.1 – 10.7.66.12610.7.66.127
610.7.66.128/2510.7.66.129 – 10.7.66.25410.7.66.255
710.7.67.0/2510.7.67.1 – 10.7.67.12610.7.67.127
810.7.67.128/2510.7.67.129 – 10.7.67.25410.7.67.255
910.7.68.0/2510.7.68.1 – 10.7.68.12610.7.68.127
1010.7.68.128/2510.7.68.129 – 10.7.68.25410.7.68.255
1110.7.69.0/2510.7.69.1 – 10.7.69.12610.7.69.127
1210.7.69.128/2510.7.69.129 – 10.7.69.25410.7.69.255
1310.7.70.0/2510.7.70.1 – 10.7.70.12610.7.70.127
1410.7.70.128/2510.7.70.129 – 10.7.70.25410.7.70.255
1510.7.71.0/2510.7.71.1 – 10.7.71.12610.7.71.127
1610.7.71.128/2510.7.71.129 – 10.7.71.25410.7.71.255
1710.7.72.0/2510.7.72.1 – 10.7.72.12610.7.72.127
1810.7.72.128/2510.7.72.129 – 10.7.72.25410.7.72.255
1910.7.73.0/2510.7.73.1 – 10.7.73.12610.7.73.127
2010.7.73.128/2510.7.73.129 – 10.7.73.25410.7.73.255
2110.7.74.0/2510.7.74.1 – 10.7.74.12610.7.74.127
2210.7.74.128/2510.7.74.129 – 10.7.74.25410.7.74.255
2310.7.75.0/2510.7.75.1 – 10.7.75.12610.7.75.127
2410.7.75.128/2510.7.75.129 – 10.7.75.25410.7.75.255
2510.7.76.0/2510.7.76.1 – 10.7.76.12610.7.76.127
2610.7.76.128/2510.7.76.129 – 10.7.76.25410.7.76.255
2710.7.77.0/2510.7.77.1 – 10.7.77.12610.7.77.127
2810.7.77.128/2510.7.77.129 – 10.7.77.25410.7.77.255
2910.7.78.0/2510.7.78.1 – 10.7.78.12610.7.78.127
3010.7.78.128/2510.7.78.129 – 10.7.78.25410.7.78.255
3110.7.79.0/2510.7.79.1 – 10.7.79.12610.7.79.127
3210.7.79.128/2510.7.79.129 – 10.7.79.25410.7.79.255
3310.7.80.0/2510.7.80.1 – 10.7.80.12610.7.80.127
3410.7.80.128/2510.7.80.129 – 10.7.80.25410.7.80.255
3510.7.81.0/2510.7.81.1 – 10.7.81.12610.7.81.127
3610.7.81.128/2510.7.81.129 – 10.7.81.25410.7.81.255
3710.7.82.0/2510.7.82.1 – 10.7.82.12610.7.82.127
3810.7.82.128/2510.7.82.129 – 10.7.82.25410.7.82.255
3910.7.83.0/2510.7.83.1 – 10.7.83.12610.7.83.127
4010.7.83.128/2510.7.83.129 – 10.7.83.25410.7.83.255
4110.7.84.0/2510.7.84.1 – 10.7.84.12610.7.84.127
4210.7.84.128/2510.7.84.129 – 10.7.84.25410.7.84.255
4310.7.85.0/2510.7.85.1 – 10.7.85.12610.7.85.127
4410.7.85.128/2510.7.85.129 – 10.7.85.25410.7.85.255
4510.7.86.0/2510.7.86.1 – 10.7.86.12610.7.86.127
4610.7.86.128/2510.7.86.129 – 10.7.86.25410.7.86.255
4710.7.87.0/2510.7.87.1 – 10.7.87.12610.7.87.127
4810.7.87.128/2510.7.87.129 – 10.7.87.25410.7.87.255
4910.7.88.0/2510.7.88.1 – 10.7.88.12610.7.88.127
5010.7.88.128/2510.7.88.129 – 10.7.88.25410.7.88.255
5110.7.89.0/2510.7.89.1 – 10.7.89.12610.7.89.127
5210.7.89.128/2510.7.89.129 – 10.7.89.25410.7.89.255
5310.7.90.0/2510.7.90.1 – 10.7.90.12610.7.90.127
5410.7.90.128/2510.7.90.129 – 10.7.90.25410.7.90.255
5510.7.91.0/2510.7.91.1 – 10.7.91.12610.7.91.127
5610.7.91.128/2510.7.91.129 – 10.7.91.25410.7.91.255
5710.7.92.0/2510.7.92.1 – 10.7.92.12610.7.92.127
5810.7.92.128/2510.7.92.129 – 10.7.92.25410.7.92.255
5910.7.93.0/2510.7.93.1 – 10.7.93.12610.7.93.127
6010.7.93.128/2510.7.93.129 – 10.7.93.25410.7.93.255
6110.7.94.0/2510.7.94.1 – 10.7.94.12610.7.94.127
6210.7.94.128/2510.7.94.129 – 10.7.94.25410.7.94.255
6310.7.95.0/2510.7.95.1 – 10.7.95.12610.7.95.127
6410.7.95.128/2510.7.95.129 – 10.7.95.25410.7.95.255
6510.7.96.0/2510.7.96.1 – 10.7.96.12610.7.96.127
6610.7.96.128/2510.7.96.129 – 10.7.96.25410.7.96.255
6710.7.97.0/2510.7.97.1 – 10.7.97.12610.7.97.127
6810.7.97.128/2510.7.97.129 – 10.7.97.25410.7.97.255
6910.7.98.0/2510.7.98.1 – 10.7.98.12610.7.98.127
7010.7.98.128/2510.7.98.129 – 10.7.98.25410.7.98.255
7110.7.99.0/2510.7.99.1 – 10.7.99.12610.7.99.127
7210.7.99.128/2510.7.99.129 – 10.7.99.25410.7.99.255
7310.7.100.0/2510.7.100.1 – 10.7.100.12610.7.100.127
7410.7.100.128/2510.7.100.129 – 10.7.100.25410.7.100.255
7510.7.101.0/2510.7.101.1 – 10.7.101.12610.7.101.127
7610.7.101.128/2510.7.101.129 – 10.7.101.25410.7.101.255
7710.7.102.0/2510.7.102.1 – 10.7.102.12610.7.102.127
7810.7.102.128/2510.7.102.129 – 10.7.102.25410.7.102.255
7910.7.103.0/2510.7.103.1 – 10.7.103.12610.7.103.127
8010.7.103.128/2510.7.103.129 – 10.7.103.25410.7.103.255
8110.7.104.0/2510.7.104.1 – 10.7.104.12610.7.104.127
8210.7.104.128/2510.7.104.129 – 10.7.104.25410.7.104.255
8310.7.105.0/2510.7.105.1 – 10.7.105.12610.7.105.127
8410.7.105.128/2510.7.105.129 – 10.7.105.25410.7.105.255
8510.7.106.0/2510.7.106.1 – 10.7.106.12610.7.106.127
8610.7.106.128/2510.7.106.129 – 10.7.106.25410.7.106.255
8710.7.107.0/2510.7.107.1 – 10.7.107.12610.7.107.127
8810.7.107.128/2510.7.107.129 – 10.7.107.25410.7.107.255
8910.7.108.0/2510.7.108.1 – 10.7.108.12610.7.108.127
9010.7.108.128/2510.7.108.129 – 10.7.108.25410.7.108.255
9110.7.109.0/2510.7.109.1 – 10.7.109.12610.7.109.127
9210.7.109.128/2510.7.109.129 – 10.7.109.25410.7.109.255
9310.7.110.0/2510.7.110.1 – 10.7.110.12610.7.110.127
9410.7.110.128/2510.7.110.129 – 10.7.110.25410.7.110.255
9510.7.111.0/2510.7.111.1 – 10.7.111.12610.7.111.127
9610.7.111.128/2510.7.111.129 – 10.7.111.25410.7.111.255
9710.7.112.0/2510.7.112.1 – 10.7.112.12610.7.112.127
9810.7.112.128/2510.7.112.129 – 10.7.112.25410.7.112.255
9910.7.113.0/2510.7.113.1 – 10.7.113.12610.7.113.127
10010.7.113.128/2510.7.113.129 – 10.7.113.25410.7.113.255
10110.7.114.0/2510.7.114.1 – 10.7.114.12610.7.114.127
10210.7.114.128/2510.7.114.129 – 10.7.114.25410.7.114.255
10310.7.115.0/2510.7.115.1 – 10.7.115.12610.7.115.127
10410.7.115.128/2510.7.115.129 – 10.7.115.25410.7.115.255
10510.7.116.0/2510.7.116.1 – 10.7.116.12610.7.116.127
10610.7.116.128/2510.7.116.129 – 10.7.116.25410.7.116.255
10710.7.117.0/2510.7.117.1 – 10.7.117.12610.7.117.127
10810.7.117.128/2510.7.117.129 – 10.7.117.25410.7.117.255
10910.7.118.0/2510.7.118.1 – 10.7.118.12610.7.118.127
11010.7.118.128/2510.7.118.129 – 10.7.118.25410.7.118.255
11110.7.119.0/2510.7.119.1 – 10.7.119.12610.7.119.127
11210.7.119.128/2510.7.119.129 – 10.7.119.25410.7.119.255
11310.7.120.0/2510.7.120.1 – 10.7.120.12610.7.120.127
11410.7.120.128/2510.7.120.129 – 10.7.120.25410.7.120.255
11510.7.121.0/2510.7.121.1 – 10.7.121.12610.7.121.127
11610.7.121.128/2510.7.121.129 – 10.7.121.25410.7.121.255
11710.7.122.0/2510.7.122.1 – 10.7.122.12610.7.122.127
11810.7.122.128/2510.7.122.129 – 10.7.122.25410.7.122.255
11910.7.123.0/2510.7.123.1 – 10.7.123.12610.7.123.127
12010.7.123.128/2510.7.123.129 – 10.7.123.25410.7.123.255
12110.7.124.0/2510.7.124.1 – 10.7.124.12610.7.124.127
12210.7.124.128/2510.7.124.129 – 10.7.124.25410.7.124.255
12310.7.125.0/2510.7.125.1 – 10.7.125.12610.7.125.127
12410.7.125.128/2510.7.125.129 – 10.7.125.25410.7.125.255
12510.7.126.0/2510.7.126.1 – 10.7.126.12610.7.126.127
12610.7.126.128/2510.7.126.129 – 10.7.126.25410.7.126.255
12710.7.127.0/2510.7.127.1 – 10.7.127.12610.7.127.127
12810.7.127.128/2510.7.127.129 – 10.7.127.25410.7.127.255
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 →