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)10.232.128.0/18
network10.232.128.0/18
broadcast10.232.191.255
first host10.232.128.1
last host10.232.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.232.128.0/18
address00001010.11101000.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.11101000.10000000.00000000
broadcast00001010.11101000.10111111.11111111
green = network part, grey = host part
hex0x0ae88000
decimal183009280
reverse dns0.128.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:8000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.232.128.0/2510.232.128.1 – 10.232.128.12610.232.128.127
210.232.128.128/2510.232.128.129 – 10.232.128.25410.232.128.255
310.232.129.0/2510.232.129.1 – 10.232.129.12610.232.129.127
410.232.129.128/2510.232.129.129 – 10.232.129.25410.232.129.255
510.232.130.0/2510.232.130.1 – 10.232.130.12610.232.130.127
610.232.130.128/2510.232.130.129 – 10.232.130.25410.232.130.255
710.232.131.0/2510.232.131.1 – 10.232.131.12610.232.131.127
810.232.131.128/2510.232.131.129 – 10.232.131.25410.232.131.255
910.232.132.0/2510.232.132.1 – 10.232.132.12610.232.132.127
1010.232.132.128/2510.232.132.129 – 10.232.132.25410.232.132.255
1110.232.133.0/2510.232.133.1 – 10.232.133.12610.232.133.127
1210.232.133.128/2510.232.133.129 – 10.232.133.25410.232.133.255
1310.232.134.0/2510.232.134.1 – 10.232.134.12610.232.134.127
1410.232.134.128/2510.232.134.129 – 10.232.134.25410.232.134.255
1510.232.135.0/2510.232.135.1 – 10.232.135.12610.232.135.127
1610.232.135.128/2510.232.135.129 – 10.232.135.25410.232.135.255
1710.232.136.0/2510.232.136.1 – 10.232.136.12610.232.136.127
1810.232.136.128/2510.232.136.129 – 10.232.136.25410.232.136.255
1910.232.137.0/2510.232.137.1 – 10.232.137.12610.232.137.127
2010.232.137.128/2510.232.137.129 – 10.232.137.25410.232.137.255
2110.232.138.0/2510.232.138.1 – 10.232.138.12610.232.138.127
2210.232.138.128/2510.232.138.129 – 10.232.138.25410.232.138.255
2310.232.139.0/2510.232.139.1 – 10.232.139.12610.232.139.127
2410.232.139.128/2510.232.139.129 – 10.232.139.25410.232.139.255
2510.232.140.0/2510.232.140.1 – 10.232.140.12610.232.140.127
2610.232.140.128/2510.232.140.129 – 10.232.140.25410.232.140.255
2710.232.141.0/2510.232.141.1 – 10.232.141.12610.232.141.127
2810.232.141.128/2510.232.141.129 – 10.232.141.25410.232.141.255
2910.232.142.0/2510.232.142.1 – 10.232.142.12610.232.142.127
3010.232.142.128/2510.232.142.129 – 10.232.142.25410.232.142.255
3110.232.143.0/2510.232.143.1 – 10.232.143.12610.232.143.127
3210.232.143.128/2510.232.143.129 – 10.232.143.25410.232.143.255
3310.232.144.0/2510.232.144.1 – 10.232.144.12610.232.144.127
3410.232.144.128/2510.232.144.129 – 10.232.144.25410.232.144.255
3510.232.145.0/2510.232.145.1 – 10.232.145.12610.232.145.127
3610.232.145.128/2510.232.145.129 – 10.232.145.25410.232.145.255
3710.232.146.0/2510.232.146.1 – 10.232.146.12610.232.146.127
3810.232.146.128/2510.232.146.129 – 10.232.146.25410.232.146.255
3910.232.147.0/2510.232.147.1 – 10.232.147.12610.232.147.127
4010.232.147.128/2510.232.147.129 – 10.232.147.25410.232.147.255
4110.232.148.0/2510.232.148.1 – 10.232.148.12610.232.148.127
4210.232.148.128/2510.232.148.129 – 10.232.148.25410.232.148.255
4310.232.149.0/2510.232.149.1 – 10.232.149.12610.232.149.127
4410.232.149.128/2510.232.149.129 – 10.232.149.25410.232.149.255
4510.232.150.0/2510.232.150.1 – 10.232.150.12610.232.150.127
4610.232.150.128/2510.232.150.129 – 10.232.150.25410.232.150.255
4710.232.151.0/2510.232.151.1 – 10.232.151.12610.232.151.127
4810.232.151.128/2510.232.151.129 – 10.232.151.25410.232.151.255
4910.232.152.0/2510.232.152.1 – 10.232.152.12610.232.152.127
5010.232.152.128/2510.232.152.129 – 10.232.152.25410.232.152.255
5110.232.153.0/2510.232.153.1 – 10.232.153.12610.232.153.127
5210.232.153.128/2510.232.153.129 – 10.232.153.25410.232.153.255
5310.232.154.0/2510.232.154.1 – 10.232.154.12610.232.154.127
5410.232.154.128/2510.232.154.129 – 10.232.154.25410.232.154.255
5510.232.155.0/2510.232.155.1 – 10.232.155.12610.232.155.127
5610.232.155.128/2510.232.155.129 – 10.232.155.25410.232.155.255
5710.232.156.0/2510.232.156.1 – 10.232.156.12610.232.156.127
5810.232.156.128/2510.232.156.129 – 10.232.156.25410.232.156.255
5910.232.157.0/2510.232.157.1 – 10.232.157.12610.232.157.127
6010.232.157.128/2510.232.157.129 – 10.232.157.25410.232.157.255
6110.232.158.0/2510.232.158.1 – 10.232.158.12610.232.158.127
6210.232.158.128/2510.232.158.129 – 10.232.158.25410.232.158.255
6310.232.159.0/2510.232.159.1 – 10.232.159.12610.232.159.127
6410.232.159.128/2510.232.159.129 – 10.232.159.25410.232.159.255
6510.232.160.0/2510.232.160.1 – 10.232.160.12610.232.160.127
6610.232.160.128/2510.232.160.129 – 10.232.160.25410.232.160.255
6710.232.161.0/2510.232.161.1 – 10.232.161.12610.232.161.127
6810.232.161.128/2510.232.161.129 – 10.232.161.25410.232.161.255
6910.232.162.0/2510.232.162.1 – 10.232.162.12610.232.162.127
7010.232.162.128/2510.232.162.129 – 10.232.162.25410.232.162.255
7110.232.163.0/2510.232.163.1 – 10.232.163.12610.232.163.127
7210.232.163.128/2510.232.163.129 – 10.232.163.25410.232.163.255
7310.232.164.0/2510.232.164.1 – 10.232.164.12610.232.164.127
7410.232.164.128/2510.232.164.129 – 10.232.164.25410.232.164.255
7510.232.165.0/2510.232.165.1 – 10.232.165.12610.232.165.127
7610.232.165.128/2510.232.165.129 – 10.232.165.25410.232.165.255
7710.232.166.0/2510.232.166.1 – 10.232.166.12610.232.166.127
7810.232.166.128/2510.232.166.129 – 10.232.166.25410.232.166.255
7910.232.167.0/2510.232.167.1 – 10.232.167.12610.232.167.127
8010.232.167.128/2510.232.167.129 – 10.232.167.25410.232.167.255
8110.232.168.0/2510.232.168.1 – 10.232.168.12610.232.168.127
8210.232.168.128/2510.232.168.129 – 10.232.168.25410.232.168.255
8310.232.169.0/2510.232.169.1 – 10.232.169.12610.232.169.127
8410.232.169.128/2510.232.169.129 – 10.232.169.25410.232.169.255
8510.232.170.0/2510.232.170.1 – 10.232.170.12610.232.170.127
8610.232.170.128/2510.232.170.129 – 10.232.170.25410.232.170.255
8710.232.171.0/2510.232.171.1 – 10.232.171.12610.232.171.127
8810.232.171.128/2510.232.171.129 – 10.232.171.25410.232.171.255
8910.232.172.0/2510.232.172.1 – 10.232.172.12610.232.172.127
9010.232.172.128/2510.232.172.129 – 10.232.172.25410.232.172.255
9110.232.173.0/2510.232.173.1 – 10.232.173.12610.232.173.127
9210.232.173.128/2510.232.173.129 – 10.232.173.25410.232.173.255
9310.232.174.0/2510.232.174.1 – 10.232.174.12610.232.174.127
9410.232.174.128/2510.232.174.129 – 10.232.174.25410.232.174.255
9510.232.175.0/2510.232.175.1 – 10.232.175.12610.232.175.127
9610.232.175.128/2510.232.175.129 – 10.232.175.25410.232.175.255
9710.232.176.0/2510.232.176.1 – 10.232.176.12610.232.176.127
9810.232.176.128/2510.232.176.129 – 10.232.176.25410.232.176.255
9910.232.177.0/2510.232.177.1 – 10.232.177.12610.232.177.127
10010.232.177.128/2510.232.177.129 – 10.232.177.25410.232.177.255
10110.232.178.0/2510.232.178.1 – 10.232.178.12610.232.178.127
10210.232.178.128/2510.232.178.129 – 10.232.178.25410.232.178.255
10310.232.179.0/2510.232.179.1 – 10.232.179.12610.232.179.127
10410.232.179.128/2510.232.179.129 – 10.232.179.25410.232.179.255
10510.232.180.0/2510.232.180.1 – 10.232.180.12610.232.180.127
10610.232.180.128/2510.232.180.129 – 10.232.180.25410.232.180.255
10710.232.181.0/2510.232.181.1 – 10.232.181.12610.232.181.127
10810.232.181.128/2510.232.181.129 – 10.232.181.25410.232.181.255
10910.232.182.0/2510.232.182.1 – 10.232.182.12610.232.182.127
11010.232.182.128/2510.232.182.129 – 10.232.182.25410.232.182.255
11110.232.183.0/2510.232.183.1 – 10.232.183.12610.232.183.127
11210.232.183.128/2510.232.183.129 – 10.232.183.25410.232.183.255
11310.232.184.0/2510.232.184.1 – 10.232.184.12610.232.184.127
11410.232.184.128/2510.232.184.129 – 10.232.184.25410.232.184.255
11510.232.185.0/2510.232.185.1 – 10.232.185.12610.232.185.127
11610.232.185.128/2510.232.185.129 – 10.232.185.25410.232.185.255
11710.232.186.0/2510.232.186.1 – 10.232.186.12610.232.186.127
11810.232.186.128/2510.232.186.129 – 10.232.186.25410.232.186.255
11910.232.187.0/2510.232.187.1 – 10.232.187.12610.232.187.127
12010.232.187.128/2510.232.187.129 – 10.232.187.25410.232.187.255
12110.232.188.0/2510.232.188.1 – 10.232.188.12610.232.188.127
12210.232.188.128/2510.232.188.129 – 10.232.188.25410.232.188.255
12310.232.189.0/2510.232.189.1 – 10.232.189.12610.232.189.127
12410.232.189.128/2510.232.189.129 – 10.232.189.25410.232.189.255
12510.232.190.0/2510.232.190.1 – 10.232.190.12610.232.190.127
12610.232.190.128/2510.232.190.129 – 10.232.190.25410.232.190.255
12710.232.191.0/2510.232.191.1 – 10.232.191.12610.232.191.127
12810.232.191.128/2510.232.191.129 – 10.232.191.25410.232.191.255
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 →