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)10.24.128.0/18
network10.24.128.0/18
broadcast10.24.191.255
first host10.24.128.1
last host10.24.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.24.128.0/18
address00001010.00011000.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00011000.10000000.00000000
broadcast00001010.00011000.10111111.11111111
green = network part, grey = host part
hex0x0a188000
decimal169377792
reverse dns0.128.24.10.in-addr.arpa
ipv4-mapped::ffff:a18:8000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.24.128.0/2510.24.128.1 – 10.24.128.12610.24.128.127
210.24.128.128/2510.24.128.129 – 10.24.128.25410.24.128.255
310.24.129.0/2510.24.129.1 – 10.24.129.12610.24.129.127
410.24.129.128/2510.24.129.129 – 10.24.129.25410.24.129.255
510.24.130.0/2510.24.130.1 – 10.24.130.12610.24.130.127
610.24.130.128/2510.24.130.129 – 10.24.130.25410.24.130.255
710.24.131.0/2510.24.131.1 – 10.24.131.12610.24.131.127
810.24.131.128/2510.24.131.129 – 10.24.131.25410.24.131.255
910.24.132.0/2510.24.132.1 – 10.24.132.12610.24.132.127
1010.24.132.128/2510.24.132.129 – 10.24.132.25410.24.132.255
1110.24.133.0/2510.24.133.1 – 10.24.133.12610.24.133.127
1210.24.133.128/2510.24.133.129 – 10.24.133.25410.24.133.255
1310.24.134.0/2510.24.134.1 – 10.24.134.12610.24.134.127
1410.24.134.128/2510.24.134.129 – 10.24.134.25410.24.134.255
1510.24.135.0/2510.24.135.1 – 10.24.135.12610.24.135.127
1610.24.135.128/2510.24.135.129 – 10.24.135.25410.24.135.255
1710.24.136.0/2510.24.136.1 – 10.24.136.12610.24.136.127
1810.24.136.128/2510.24.136.129 – 10.24.136.25410.24.136.255
1910.24.137.0/2510.24.137.1 – 10.24.137.12610.24.137.127
2010.24.137.128/2510.24.137.129 – 10.24.137.25410.24.137.255
2110.24.138.0/2510.24.138.1 – 10.24.138.12610.24.138.127
2210.24.138.128/2510.24.138.129 – 10.24.138.25410.24.138.255
2310.24.139.0/2510.24.139.1 – 10.24.139.12610.24.139.127
2410.24.139.128/2510.24.139.129 – 10.24.139.25410.24.139.255
2510.24.140.0/2510.24.140.1 – 10.24.140.12610.24.140.127
2610.24.140.128/2510.24.140.129 – 10.24.140.25410.24.140.255
2710.24.141.0/2510.24.141.1 – 10.24.141.12610.24.141.127
2810.24.141.128/2510.24.141.129 – 10.24.141.25410.24.141.255
2910.24.142.0/2510.24.142.1 – 10.24.142.12610.24.142.127
3010.24.142.128/2510.24.142.129 – 10.24.142.25410.24.142.255
3110.24.143.0/2510.24.143.1 – 10.24.143.12610.24.143.127
3210.24.143.128/2510.24.143.129 – 10.24.143.25410.24.143.255
3310.24.144.0/2510.24.144.1 – 10.24.144.12610.24.144.127
3410.24.144.128/2510.24.144.129 – 10.24.144.25410.24.144.255
3510.24.145.0/2510.24.145.1 – 10.24.145.12610.24.145.127
3610.24.145.128/2510.24.145.129 – 10.24.145.25410.24.145.255
3710.24.146.0/2510.24.146.1 – 10.24.146.12610.24.146.127
3810.24.146.128/2510.24.146.129 – 10.24.146.25410.24.146.255
3910.24.147.0/2510.24.147.1 – 10.24.147.12610.24.147.127
4010.24.147.128/2510.24.147.129 – 10.24.147.25410.24.147.255
4110.24.148.0/2510.24.148.1 – 10.24.148.12610.24.148.127
4210.24.148.128/2510.24.148.129 – 10.24.148.25410.24.148.255
4310.24.149.0/2510.24.149.1 – 10.24.149.12610.24.149.127
4410.24.149.128/2510.24.149.129 – 10.24.149.25410.24.149.255
4510.24.150.0/2510.24.150.1 – 10.24.150.12610.24.150.127
4610.24.150.128/2510.24.150.129 – 10.24.150.25410.24.150.255
4710.24.151.0/2510.24.151.1 – 10.24.151.12610.24.151.127
4810.24.151.128/2510.24.151.129 – 10.24.151.25410.24.151.255
4910.24.152.0/2510.24.152.1 – 10.24.152.12610.24.152.127
5010.24.152.128/2510.24.152.129 – 10.24.152.25410.24.152.255
5110.24.153.0/2510.24.153.1 – 10.24.153.12610.24.153.127
5210.24.153.128/2510.24.153.129 – 10.24.153.25410.24.153.255
5310.24.154.0/2510.24.154.1 – 10.24.154.12610.24.154.127
5410.24.154.128/2510.24.154.129 – 10.24.154.25410.24.154.255
5510.24.155.0/2510.24.155.1 – 10.24.155.12610.24.155.127
5610.24.155.128/2510.24.155.129 – 10.24.155.25410.24.155.255
5710.24.156.0/2510.24.156.1 – 10.24.156.12610.24.156.127
5810.24.156.128/2510.24.156.129 – 10.24.156.25410.24.156.255
5910.24.157.0/2510.24.157.1 – 10.24.157.12610.24.157.127
6010.24.157.128/2510.24.157.129 – 10.24.157.25410.24.157.255
6110.24.158.0/2510.24.158.1 – 10.24.158.12610.24.158.127
6210.24.158.128/2510.24.158.129 – 10.24.158.25410.24.158.255
6310.24.159.0/2510.24.159.1 – 10.24.159.12610.24.159.127
6410.24.159.128/2510.24.159.129 – 10.24.159.25410.24.159.255
6510.24.160.0/2510.24.160.1 – 10.24.160.12610.24.160.127
6610.24.160.128/2510.24.160.129 – 10.24.160.25410.24.160.255
6710.24.161.0/2510.24.161.1 – 10.24.161.12610.24.161.127
6810.24.161.128/2510.24.161.129 – 10.24.161.25410.24.161.255
6910.24.162.0/2510.24.162.1 – 10.24.162.12610.24.162.127
7010.24.162.128/2510.24.162.129 – 10.24.162.25410.24.162.255
7110.24.163.0/2510.24.163.1 – 10.24.163.12610.24.163.127
7210.24.163.128/2510.24.163.129 – 10.24.163.25410.24.163.255
7310.24.164.0/2510.24.164.1 – 10.24.164.12610.24.164.127
7410.24.164.128/2510.24.164.129 – 10.24.164.25410.24.164.255
7510.24.165.0/2510.24.165.1 – 10.24.165.12610.24.165.127
7610.24.165.128/2510.24.165.129 – 10.24.165.25410.24.165.255
7710.24.166.0/2510.24.166.1 – 10.24.166.12610.24.166.127
7810.24.166.128/2510.24.166.129 – 10.24.166.25410.24.166.255
7910.24.167.0/2510.24.167.1 – 10.24.167.12610.24.167.127
8010.24.167.128/2510.24.167.129 – 10.24.167.25410.24.167.255
8110.24.168.0/2510.24.168.1 – 10.24.168.12610.24.168.127
8210.24.168.128/2510.24.168.129 – 10.24.168.25410.24.168.255
8310.24.169.0/2510.24.169.1 – 10.24.169.12610.24.169.127
8410.24.169.128/2510.24.169.129 – 10.24.169.25410.24.169.255
8510.24.170.0/2510.24.170.1 – 10.24.170.12610.24.170.127
8610.24.170.128/2510.24.170.129 – 10.24.170.25410.24.170.255
8710.24.171.0/2510.24.171.1 – 10.24.171.12610.24.171.127
8810.24.171.128/2510.24.171.129 – 10.24.171.25410.24.171.255
8910.24.172.0/2510.24.172.1 – 10.24.172.12610.24.172.127
9010.24.172.128/2510.24.172.129 – 10.24.172.25410.24.172.255
9110.24.173.0/2510.24.173.1 – 10.24.173.12610.24.173.127
9210.24.173.128/2510.24.173.129 – 10.24.173.25410.24.173.255
9310.24.174.0/2510.24.174.1 – 10.24.174.12610.24.174.127
9410.24.174.128/2510.24.174.129 – 10.24.174.25410.24.174.255
9510.24.175.0/2510.24.175.1 – 10.24.175.12610.24.175.127
9610.24.175.128/2510.24.175.129 – 10.24.175.25410.24.175.255
9710.24.176.0/2510.24.176.1 – 10.24.176.12610.24.176.127
9810.24.176.128/2510.24.176.129 – 10.24.176.25410.24.176.255
9910.24.177.0/2510.24.177.1 – 10.24.177.12610.24.177.127
10010.24.177.128/2510.24.177.129 – 10.24.177.25410.24.177.255
10110.24.178.0/2510.24.178.1 – 10.24.178.12610.24.178.127
10210.24.178.128/2510.24.178.129 – 10.24.178.25410.24.178.255
10310.24.179.0/2510.24.179.1 – 10.24.179.12610.24.179.127
10410.24.179.128/2510.24.179.129 – 10.24.179.25410.24.179.255
10510.24.180.0/2510.24.180.1 – 10.24.180.12610.24.180.127
10610.24.180.128/2510.24.180.129 – 10.24.180.25410.24.180.255
10710.24.181.0/2510.24.181.1 – 10.24.181.12610.24.181.127
10810.24.181.128/2510.24.181.129 – 10.24.181.25410.24.181.255
10910.24.182.0/2510.24.182.1 – 10.24.182.12610.24.182.127
11010.24.182.128/2510.24.182.129 – 10.24.182.25410.24.182.255
11110.24.183.0/2510.24.183.1 – 10.24.183.12610.24.183.127
11210.24.183.128/2510.24.183.129 – 10.24.183.25410.24.183.255
11310.24.184.0/2510.24.184.1 – 10.24.184.12610.24.184.127
11410.24.184.128/2510.24.184.129 – 10.24.184.25410.24.184.255
11510.24.185.0/2510.24.185.1 – 10.24.185.12610.24.185.127
11610.24.185.128/2510.24.185.129 – 10.24.185.25410.24.185.255
11710.24.186.0/2510.24.186.1 – 10.24.186.12610.24.186.127
11810.24.186.128/2510.24.186.129 – 10.24.186.25410.24.186.255
11910.24.187.0/2510.24.187.1 – 10.24.187.12610.24.187.127
12010.24.187.128/2510.24.187.129 – 10.24.187.25410.24.187.255
12110.24.188.0/2510.24.188.1 – 10.24.188.12610.24.188.127
12210.24.188.128/2510.24.188.129 – 10.24.188.25410.24.188.255
12310.24.189.0/2510.24.189.1 – 10.24.189.12610.24.189.127
12410.24.189.128/2510.24.189.129 – 10.24.189.25410.24.189.255
12510.24.190.0/2510.24.190.1 – 10.24.190.12610.24.190.127
12610.24.190.128/2510.24.190.129 – 10.24.190.25410.24.190.255
12710.24.191.0/2510.24.191.1 – 10.24.191.12610.24.191.127
12810.24.191.128/2510.24.191.129 – 10.24.191.25410.24.191.255
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 →