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)10.59.128.0/18
network10.59.128.0/18
broadcast10.59.191.255
first host10.59.128.1
last host10.59.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.59.128.0/18
address00001010.00111011.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00111011.10000000.00000000
broadcast00001010.00111011.10111111.11111111
green = network part, grey = host part
hex0x0a3b8000
decimal171671552
reverse dns0.128.59.10.in-addr.arpa
ipv4-mapped::ffff:a3b:8000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.59.128.0/2510.59.128.1 – 10.59.128.12610.59.128.127
210.59.128.128/2510.59.128.129 – 10.59.128.25410.59.128.255
310.59.129.0/2510.59.129.1 – 10.59.129.12610.59.129.127
410.59.129.128/2510.59.129.129 – 10.59.129.25410.59.129.255
510.59.130.0/2510.59.130.1 – 10.59.130.12610.59.130.127
610.59.130.128/2510.59.130.129 – 10.59.130.25410.59.130.255
710.59.131.0/2510.59.131.1 – 10.59.131.12610.59.131.127
810.59.131.128/2510.59.131.129 – 10.59.131.25410.59.131.255
910.59.132.0/2510.59.132.1 – 10.59.132.12610.59.132.127
1010.59.132.128/2510.59.132.129 – 10.59.132.25410.59.132.255
1110.59.133.0/2510.59.133.1 – 10.59.133.12610.59.133.127
1210.59.133.128/2510.59.133.129 – 10.59.133.25410.59.133.255
1310.59.134.0/2510.59.134.1 – 10.59.134.12610.59.134.127
1410.59.134.128/2510.59.134.129 – 10.59.134.25410.59.134.255
1510.59.135.0/2510.59.135.1 – 10.59.135.12610.59.135.127
1610.59.135.128/2510.59.135.129 – 10.59.135.25410.59.135.255
1710.59.136.0/2510.59.136.1 – 10.59.136.12610.59.136.127
1810.59.136.128/2510.59.136.129 – 10.59.136.25410.59.136.255
1910.59.137.0/2510.59.137.1 – 10.59.137.12610.59.137.127
2010.59.137.128/2510.59.137.129 – 10.59.137.25410.59.137.255
2110.59.138.0/2510.59.138.1 – 10.59.138.12610.59.138.127
2210.59.138.128/2510.59.138.129 – 10.59.138.25410.59.138.255
2310.59.139.0/2510.59.139.1 – 10.59.139.12610.59.139.127
2410.59.139.128/2510.59.139.129 – 10.59.139.25410.59.139.255
2510.59.140.0/2510.59.140.1 – 10.59.140.12610.59.140.127
2610.59.140.128/2510.59.140.129 – 10.59.140.25410.59.140.255
2710.59.141.0/2510.59.141.1 – 10.59.141.12610.59.141.127
2810.59.141.128/2510.59.141.129 – 10.59.141.25410.59.141.255
2910.59.142.0/2510.59.142.1 – 10.59.142.12610.59.142.127
3010.59.142.128/2510.59.142.129 – 10.59.142.25410.59.142.255
3110.59.143.0/2510.59.143.1 – 10.59.143.12610.59.143.127
3210.59.143.128/2510.59.143.129 – 10.59.143.25410.59.143.255
3310.59.144.0/2510.59.144.1 – 10.59.144.12610.59.144.127
3410.59.144.128/2510.59.144.129 – 10.59.144.25410.59.144.255
3510.59.145.0/2510.59.145.1 – 10.59.145.12610.59.145.127
3610.59.145.128/2510.59.145.129 – 10.59.145.25410.59.145.255
3710.59.146.0/2510.59.146.1 – 10.59.146.12610.59.146.127
3810.59.146.128/2510.59.146.129 – 10.59.146.25410.59.146.255
3910.59.147.0/2510.59.147.1 – 10.59.147.12610.59.147.127
4010.59.147.128/2510.59.147.129 – 10.59.147.25410.59.147.255
4110.59.148.0/2510.59.148.1 – 10.59.148.12610.59.148.127
4210.59.148.128/2510.59.148.129 – 10.59.148.25410.59.148.255
4310.59.149.0/2510.59.149.1 – 10.59.149.12610.59.149.127
4410.59.149.128/2510.59.149.129 – 10.59.149.25410.59.149.255
4510.59.150.0/2510.59.150.1 – 10.59.150.12610.59.150.127
4610.59.150.128/2510.59.150.129 – 10.59.150.25410.59.150.255
4710.59.151.0/2510.59.151.1 – 10.59.151.12610.59.151.127
4810.59.151.128/2510.59.151.129 – 10.59.151.25410.59.151.255
4910.59.152.0/2510.59.152.1 – 10.59.152.12610.59.152.127
5010.59.152.128/2510.59.152.129 – 10.59.152.25410.59.152.255
5110.59.153.0/2510.59.153.1 – 10.59.153.12610.59.153.127
5210.59.153.128/2510.59.153.129 – 10.59.153.25410.59.153.255
5310.59.154.0/2510.59.154.1 – 10.59.154.12610.59.154.127
5410.59.154.128/2510.59.154.129 – 10.59.154.25410.59.154.255
5510.59.155.0/2510.59.155.1 – 10.59.155.12610.59.155.127
5610.59.155.128/2510.59.155.129 – 10.59.155.25410.59.155.255
5710.59.156.0/2510.59.156.1 – 10.59.156.12610.59.156.127
5810.59.156.128/2510.59.156.129 – 10.59.156.25410.59.156.255
5910.59.157.0/2510.59.157.1 – 10.59.157.12610.59.157.127
6010.59.157.128/2510.59.157.129 – 10.59.157.25410.59.157.255
6110.59.158.0/2510.59.158.1 – 10.59.158.12610.59.158.127
6210.59.158.128/2510.59.158.129 – 10.59.158.25410.59.158.255
6310.59.159.0/2510.59.159.1 – 10.59.159.12610.59.159.127
6410.59.159.128/2510.59.159.129 – 10.59.159.25410.59.159.255
6510.59.160.0/2510.59.160.1 – 10.59.160.12610.59.160.127
6610.59.160.128/2510.59.160.129 – 10.59.160.25410.59.160.255
6710.59.161.0/2510.59.161.1 – 10.59.161.12610.59.161.127
6810.59.161.128/2510.59.161.129 – 10.59.161.25410.59.161.255
6910.59.162.0/2510.59.162.1 – 10.59.162.12610.59.162.127
7010.59.162.128/2510.59.162.129 – 10.59.162.25410.59.162.255
7110.59.163.0/2510.59.163.1 – 10.59.163.12610.59.163.127
7210.59.163.128/2510.59.163.129 – 10.59.163.25410.59.163.255
7310.59.164.0/2510.59.164.1 – 10.59.164.12610.59.164.127
7410.59.164.128/2510.59.164.129 – 10.59.164.25410.59.164.255
7510.59.165.0/2510.59.165.1 – 10.59.165.12610.59.165.127
7610.59.165.128/2510.59.165.129 – 10.59.165.25410.59.165.255
7710.59.166.0/2510.59.166.1 – 10.59.166.12610.59.166.127
7810.59.166.128/2510.59.166.129 – 10.59.166.25410.59.166.255
7910.59.167.0/2510.59.167.1 – 10.59.167.12610.59.167.127
8010.59.167.128/2510.59.167.129 – 10.59.167.25410.59.167.255
8110.59.168.0/2510.59.168.1 – 10.59.168.12610.59.168.127
8210.59.168.128/2510.59.168.129 – 10.59.168.25410.59.168.255
8310.59.169.0/2510.59.169.1 – 10.59.169.12610.59.169.127
8410.59.169.128/2510.59.169.129 – 10.59.169.25410.59.169.255
8510.59.170.0/2510.59.170.1 – 10.59.170.12610.59.170.127
8610.59.170.128/2510.59.170.129 – 10.59.170.25410.59.170.255
8710.59.171.0/2510.59.171.1 – 10.59.171.12610.59.171.127
8810.59.171.128/2510.59.171.129 – 10.59.171.25410.59.171.255
8910.59.172.0/2510.59.172.1 – 10.59.172.12610.59.172.127
9010.59.172.128/2510.59.172.129 – 10.59.172.25410.59.172.255
9110.59.173.0/2510.59.173.1 – 10.59.173.12610.59.173.127
9210.59.173.128/2510.59.173.129 – 10.59.173.25410.59.173.255
9310.59.174.0/2510.59.174.1 – 10.59.174.12610.59.174.127
9410.59.174.128/2510.59.174.129 – 10.59.174.25410.59.174.255
9510.59.175.0/2510.59.175.1 – 10.59.175.12610.59.175.127
9610.59.175.128/2510.59.175.129 – 10.59.175.25410.59.175.255
9710.59.176.0/2510.59.176.1 – 10.59.176.12610.59.176.127
9810.59.176.128/2510.59.176.129 – 10.59.176.25410.59.176.255
9910.59.177.0/2510.59.177.1 – 10.59.177.12610.59.177.127
10010.59.177.128/2510.59.177.129 – 10.59.177.25410.59.177.255
10110.59.178.0/2510.59.178.1 – 10.59.178.12610.59.178.127
10210.59.178.128/2510.59.178.129 – 10.59.178.25410.59.178.255
10310.59.179.0/2510.59.179.1 – 10.59.179.12610.59.179.127
10410.59.179.128/2510.59.179.129 – 10.59.179.25410.59.179.255
10510.59.180.0/2510.59.180.1 – 10.59.180.12610.59.180.127
10610.59.180.128/2510.59.180.129 – 10.59.180.25410.59.180.255
10710.59.181.0/2510.59.181.1 – 10.59.181.12610.59.181.127
10810.59.181.128/2510.59.181.129 – 10.59.181.25410.59.181.255
10910.59.182.0/2510.59.182.1 – 10.59.182.12610.59.182.127
11010.59.182.128/2510.59.182.129 – 10.59.182.25410.59.182.255
11110.59.183.0/2510.59.183.1 – 10.59.183.12610.59.183.127
11210.59.183.128/2510.59.183.129 – 10.59.183.25410.59.183.255
11310.59.184.0/2510.59.184.1 – 10.59.184.12610.59.184.127
11410.59.184.128/2510.59.184.129 – 10.59.184.25410.59.184.255
11510.59.185.0/2510.59.185.1 – 10.59.185.12610.59.185.127
11610.59.185.128/2510.59.185.129 – 10.59.185.25410.59.185.255
11710.59.186.0/2510.59.186.1 – 10.59.186.12610.59.186.127
11810.59.186.128/2510.59.186.129 – 10.59.186.25410.59.186.255
11910.59.187.0/2510.59.187.1 – 10.59.187.12610.59.187.127
12010.59.187.128/2510.59.187.129 – 10.59.187.25410.59.187.255
12110.59.188.0/2510.59.188.1 – 10.59.188.12610.59.188.127
12210.59.188.128/2510.59.188.129 – 10.59.188.25410.59.188.255
12310.59.189.0/2510.59.189.1 – 10.59.189.12610.59.189.127
12410.59.189.128/2510.59.189.129 – 10.59.189.25410.59.189.255
12510.59.190.0/2510.59.190.1 – 10.59.190.12610.59.190.127
12610.59.190.128/2510.59.190.129 – 10.59.190.25410.59.190.255
12710.59.191.0/2510.59.191.1 – 10.59.191.12610.59.191.127
12810.59.191.128/2510.59.191.129 – 10.59.191.25410.59.191.255
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 →