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)10.57.64.0/18
network10.57.64.0/18
broadcast10.57.127.255
first host10.57.64.1
last host10.57.127.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.57.64.0/18
address00001010.00111001.01000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00111001.01000000.00000000
broadcast00001010.00111001.01111111.11111111
green = network part, grey = host part
hex0x0a394000
decimal171524096
reverse dns0.64.57.10.in-addr.arpa
ipv4-mapped::ffff:a39:4000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.57.64.0/2510.57.64.1 – 10.57.64.12610.57.64.127
210.57.64.128/2510.57.64.129 – 10.57.64.25410.57.64.255
310.57.65.0/2510.57.65.1 – 10.57.65.12610.57.65.127
410.57.65.128/2510.57.65.129 – 10.57.65.25410.57.65.255
510.57.66.0/2510.57.66.1 – 10.57.66.12610.57.66.127
610.57.66.128/2510.57.66.129 – 10.57.66.25410.57.66.255
710.57.67.0/2510.57.67.1 – 10.57.67.12610.57.67.127
810.57.67.128/2510.57.67.129 – 10.57.67.25410.57.67.255
910.57.68.0/2510.57.68.1 – 10.57.68.12610.57.68.127
1010.57.68.128/2510.57.68.129 – 10.57.68.25410.57.68.255
1110.57.69.0/2510.57.69.1 – 10.57.69.12610.57.69.127
1210.57.69.128/2510.57.69.129 – 10.57.69.25410.57.69.255
1310.57.70.0/2510.57.70.1 – 10.57.70.12610.57.70.127
1410.57.70.128/2510.57.70.129 – 10.57.70.25410.57.70.255
1510.57.71.0/2510.57.71.1 – 10.57.71.12610.57.71.127
1610.57.71.128/2510.57.71.129 – 10.57.71.25410.57.71.255
1710.57.72.0/2510.57.72.1 – 10.57.72.12610.57.72.127
1810.57.72.128/2510.57.72.129 – 10.57.72.25410.57.72.255
1910.57.73.0/2510.57.73.1 – 10.57.73.12610.57.73.127
2010.57.73.128/2510.57.73.129 – 10.57.73.25410.57.73.255
2110.57.74.0/2510.57.74.1 – 10.57.74.12610.57.74.127
2210.57.74.128/2510.57.74.129 – 10.57.74.25410.57.74.255
2310.57.75.0/2510.57.75.1 – 10.57.75.12610.57.75.127
2410.57.75.128/2510.57.75.129 – 10.57.75.25410.57.75.255
2510.57.76.0/2510.57.76.1 – 10.57.76.12610.57.76.127
2610.57.76.128/2510.57.76.129 – 10.57.76.25410.57.76.255
2710.57.77.0/2510.57.77.1 – 10.57.77.12610.57.77.127
2810.57.77.128/2510.57.77.129 – 10.57.77.25410.57.77.255
2910.57.78.0/2510.57.78.1 – 10.57.78.12610.57.78.127
3010.57.78.128/2510.57.78.129 – 10.57.78.25410.57.78.255
3110.57.79.0/2510.57.79.1 – 10.57.79.12610.57.79.127
3210.57.79.128/2510.57.79.129 – 10.57.79.25410.57.79.255
3310.57.80.0/2510.57.80.1 – 10.57.80.12610.57.80.127
3410.57.80.128/2510.57.80.129 – 10.57.80.25410.57.80.255
3510.57.81.0/2510.57.81.1 – 10.57.81.12610.57.81.127
3610.57.81.128/2510.57.81.129 – 10.57.81.25410.57.81.255
3710.57.82.0/2510.57.82.1 – 10.57.82.12610.57.82.127
3810.57.82.128/2510.57.82.129 – 10.57.82.25410.57.82.255
3910.57.83.0/2510.57.83.1 – 10.57.83.12610.57.83.127
4010.57.83.128/2510.57.83.129 – 10.57.83.25410.57.83.255
4110.57.84.0/2510.57.84.1 – 10.57.84.12610.57.84.127
4210.57.84.128/2510.57.84.129 – 10.57.84.25410.57.84.255
4310.57.85.0/2510.57.85.1 – 10.57.85.12610.57.85.127
4410.57.85.128/2510.57.85.129 – 10.57.85.25410.57.85.255
4510.57.86.0/2510.57.86.1 – 10.57.86.12610.57.86.127
4610.57.86.128/2510.57.86.129 – 10.57.86.25410.57.86.255
4710.57.87.0/2510.57.87.1 – 10.57.87.12610.57.87.127
4810.57.87.128/2510.57.87.129 – 10.57.87.25410.57.87.255
4910.57.88.0/2510.57.88.1 – 10.57.88.12610.57.88.127
5010.57.88.128/2510.57.88.129 – 10.57.88.25410.57.88.255
5110.57.89.0/2510.57.89.1 – 10.57.89.12610.57.89.127
5210.57.89.128/2510.57.89.129 – 10.57.89.25410.57.89.255
5310.57.90.0/2510.57.90.1 – 10.57.90.12610.57.90.127
5410.57.90.128/2510.57.90.129 – 10.57.90.25410.57.90.255
5510.57.91.0/2510.57.91.1 – 10.57.91.12610.57.91.127
5610.57.91.128/2510.57.91.129 – 10.57.91.25410.57.91.255
5710.57.92.0/2510.57.92.1 – 10.57.92.12610.57.92.127
5810.57.92.128/2510.57.92.129 – 10.57.92.25410.57.92.255
5910.57.93.0/2510.57.93.1 – 10.57.93.12610.57.93.127
6010.57.93.128/2510.57.93.129 – 10.57.93.25410.57.93.255
6110.57.94.0/2510.57.94.1 – 10.57.94.12610.57.94.127
6210.57.94.128/2510.57.94.129 – 10.57.94.25410.57.94.255
6310.57.95.0/2510.57.95.1 – 10.57.95.12610.57.95.127
6410.57.95.128/2510.57.95.129 – 10.57.95.25410.57.95.255
6510.57.96.0/2510.57.96.1 – 10.57.96.12610.57.96.127
6610.57.96.128/2510.57.96.129 – 10.57.96.25410.57.96.255
6710.57.97.0/2510.57.97.1 – 10.57.97.12610.57.97.127
6810.57.97.128/2510.57.97.129 – 10.57.97.25410.57.97.255
6910.57.98.0/2510.57.98.1 – 10.57.98.12610.57.98.127
7010.57.98.128/2510.57.98.129 – 10.57.98.25410.57.98.255
7110.57.99.0/2510.57.99.1 – 10.57.99.12610.57.99.127
7210.57.99.128/2510.57.99.129 – 10.57.99.25410.57.99.255
7310.57.100.0/2510.57.100.1 – 10.57.100.12610.57.100.127
7410.57.100.128/2510.57.100.129 – 10.57.100.25410.57.100.255
7510.57.101.0/2510.57.101.1 – 10.57.101.12610.57.101.127
7610.57.101.128/2510.57.101.129 – 10.57.101.25410.57.101.255
7710.57.102.0/2510.57.102.1 – 10.57.102.12610.57.102.127
7810.57.102.128/2510.57.102.129 – 10.57.102.25410.57.102.255
7910.57.103.0/2510.57.103.1 – 10.57.103.12610.57.103.127
8010.57.103.128/2510.57.103.129 – 10.57.103.25410.57.103.255
8110.57.104.0/2510.57.104.1 – 10.57.104.12610.57.104.127
8210.57.104.128/2510.57.104.129 – 10.57.104.25410.57.104.255
8310.57.105.0/2510.57.105.1 – 10.57.105.12610.57.105.127
8410.57.105.128/2510.57.105.129 – 10.57.105.25410.57.105.255
8510.57.106.0/2510.57.106.1 – 10.57.106.12610.57.106.127
8610.57.106.128/2510.57.106.129 – 10.57.106.25410.57.106.255
8710.57.107.0/2510.57.107.1 – 10.57.107.12610.57.107.127
8810.57.107.128/2510.57.107.129 – 10.57.107.25410.57.107.255
8910.57.108.0/2510.57.108.1 – 10.57.108.12610.57.108.127
9010.57.108.128/2510.57.108.129 – 10.57.108.25410.57.108.255
9110.57.109.0/2510.57.109.1 – 10.57.109.12610.57.109.127
9210.57.109.128/2510.57.109.129 – 10.57.109.25410.57.109.255
9310.57.110.0/2510.57.110.1 – 10.57.110.12610.57.110.127
9410.57.110.128/2510.57.110.129 – 10.57.110.25410.57.110.255
9510.57.111.0/2510.57.111.1 – 10.57.111.12610.57.111.127
9610.57.111.128/2510.57.111.129 – 10.57.111.25410.57.111.255
9710.57.112.0/2510.57.112.1 – 10.57.112.12610.57.112.127
9810.57.112.128/2510.57.112.129 – 10.57.112.25410.57.112.255
9910.57.113.0/2510.57.113.1 – 10.57.113.12610.57.113.127
10010.57.113.128/2510.57.113.129 – 10.57.113.25410.57.113.255
10110.57.114.0/2510.57.114.1 – 10.57.114.12610.57.114.127
10210.57.114.128/2510.57.114.129 – 10.57.114.25410.57.114.255
10310.57.115.0/2510.57.115.1 – 10.57.115.12610.57.115.127
10410.57.115.128/2510.57.115.129 – 10.57.115.25410.57.115.255
10510.57.116.0/2510.57.116.1 – 10.57.116.12610.57.116.127
10610.57.116.128/2510.57.116.129 – 10.57.116.25410.57.116.255
10710.57.117.0/2510.57.117.1 – 10.57.117.12610.57.117.127
10810.57.117.128/2510.57.117.129 – 10.57.117.25410.57.117.255
10910.57.118.0/2510.57.118.1 – 10.57.118.12610.57.118.127
11010.57.118.128/2510.57.118.129 – 10.57.118.25410.57.118.255
11110.57.119.0/2510.57.119.1 – 10.57.119.12610.57.119.127
11210.57.119.128/2510.57.119.129 – 10.57.119.25410.57.119.255
11310.57.120.0/2510.57.120.1 – 10.57.120.12610.57.120.127
11410.57.120.128/2510.57.120.129 – 10.57.120.25410.57.120.255
11510.57.121.0/2510.57.121.1 – 10.57.121.12610.57.121.127
11610.57.121.128/2510.57.121.129 – 10.57.121.25410.57.121.255
11710.57.122.0/2510.57.122.1 – 10.57.122.12610.57.122.127
11810.57.122.128/2510.57.122.129 – 10.57.122.25410.57.122.255
11910.57.123.0/2510.57.123.1 – 10.57.123.12610.57.123.127
12010.57.123.128/2510.57.123.129 – 10.57.123.25410.57.123.255
12110.57.124.0/2510.57.124.1 – 10.57.124.12610.57.124.127
12210.57.124.128/2510.57.124.129 – 10.57.124.25410.57.124.255
12310.57.125.0/2510.57.125.1 – 10.57.125.12610.57.125.127
12410.57.125.128/2510.57.125.129 – 10.57.125.25410.57.125.255
12510.57.126.0/2510.57.126.1 – 10.57.126.12610.57.126.127
12610.57.126.128/2510.57.126.129 – 10.57.126.25410.57.126.255
12710.57.127.0/2510.57.127.1 – 10.57.127.12610.57.127.127
12810.57.127.128/2510.57.127.129 – 10.57.127.25410.57.127.255
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 →