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)10.41.128.0/18
network10.41.128.0/18
broadcast10.41.191.255
first host10.41.128.1
last host10.41.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.41.128.0/18
address00001010.00101001.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101001.10000000.00000000
broadcast00001010.00101001.10111111.11111111
green = network part, grey = host part
hex0x0a298000
decimal170491904
reverse dns0.128.41.10.in-addr.arpa
ipv4-mapped::ffff:a29:8000

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.41.128.0/2510.41.128.1 – 10.41.128.12610.41.128.127
210.41.128.128/2510.41.128.129 – 10.41.128.25410.41.128.255
310.41.129.0/2510.41.129.1 – 10.41.129.12610.41.129.127
410.41.129.128/2510.41.129.129 – 10.41.129.25410.41.129.255
510.41.130.0/2510.41.130.1 – 10.41.130.12610.41.130.127
610.41.130.128/2510.41.130.129 – 10.41.130.25410.41.130.255
710.41.131.0/2510.41.131.1 – 10.41.131.12610.41.131.127
810.41.131.128/2510.41.131.129 – 10.41.131.25410.41.131.255
910.41.132.0/2510.41.132.1 – 10.41.132.12610.41.132.127
1010.41.132.128/2510.41.132.129 – 10.41.132.25410.41.132.255
1110.41.133.0/2510.41.133.1 – 10.41.133.12610.41.133.127
1210.41.133.128/2510.41.133.129 – 10.41.133.25410.41.133.255
1310.41.134.0/2510.41.134.1 – 10.41.134.12610.41.134.127
1410.41.134.128/2510.41.134.129 – 10.41.134.25410.41.134.255
1510.41.135.0/2510.41.135.1 – 10.41.135.12610.41.135.127
1610.41.135.128/2510.41.135.129 – 10.41.135.25410.41.135.255
1710.41.136.0/2510.41.136.1 – 10.41.136.12610.41.136.127
1810.41.136.128/2510.41.136.129 – 10.41.136.25410.41.136.255
1910.41.137.0/2510.41.137.1 – 10.41.137.12610.41.137.127
2010.41.137.128/2510.41.137.129 – 10.41.137.25410.41.137.255
2110.41.138.0/2510.41.138.1 – 10.41.138.12610.41.138.127
2210.41.138.128/2510.41.138.129 – 10.41.138.25410.41.138.255
2310.41.139.0/2510.41.139.1 – 10.41.139.12610.41.139.127
2410.41.139.128/2510.41.139.129 – 10.41.139.25410.41.139.255
2510.41.140.0/2510.41.140.1 – 10.41.140.12610.41.140.127
2610.41.140.128/2510.41.140.129 – 10.41.140.25410.41.140.255
2710.41.141.0/2510.41.141.1 – 10.41.141.12610.41.141.127
2810.41.141.128/2510.41.141.129 – 10.41.141.25410.41.141.255
2910.41.142.0/2510.41.142.1 – 10.41.142.12610.41.142.127
3010.41.142.128/2510.41.142.129 – 10.41.142.25410.41.142.255
3110.41.143.0/2510.41.143.1 – 10.41.143.12610.41.143.127
3210.41.143.128/2510.41.143.129 – 10.41.143.25410.41.143.255
3310.41.144.0/2510.41.144.1 – 10.41.144.12610.41.144.127
3410.41.144.128/2510.41.144.129 – 10.41.144.25410.41.144.255
3510.41.145.0/2510.41.145.1 – 10.41.145.12610.41.145.127
3610.41.145.128/2510.41.145.129 – 10.41.145.25410.41.145.255
3710.41.146.0/2510.41.146.1 – 10.41.146.12610.41.146.127
3810.41.146.128/2510.41.146.129 – 10.41.146.25410.41.146.255
3910.41.147.0/2510.41.147.1 – 10.41.147.12610.41.147.127
4010.41.147.128/2510.41.147.129 – 10.41.147.25410.41.147.255
4110.41.148.0/2510.41.148.1 – 10.41.148.12610.41.148.127
4210.41.148.128/2510.41.148.129 – 10.41.148.25410.41.148.255
4310.41.149.0/2510.41.149.1 – 10.41.149.12610.41.149.127
4410.41.149.128/2510.41.149.129 – 10.41.149.25410.41.149.255
4510.41.150.0/2510.41.150.1 – 10.41.150.12610.41.150.127
4610.41.150.128/2510.41.150.129 – 10.41.150.25410.41.150.255
4710.41.151.0/2510.41.151.1 – 10.41.151.12610.41.151.127
4810.41.151.128/2510.41.151.129 – 10.41.151.25410.41.151.255
4910.41.152.0/2510.41.152.1 – 10.41.152.12610.41.152.127
5010.41.152.128/2510.41.152.129 – 10.41.152.25410.41.152.255
5110.41.153.0/2510.41.153.1 – 10.41.153.12610.41.153.127
5210.41.153.128/2510.41.153.129 – 10.41.153.25410.41.153.255
5310.41.154.0/2510.41.154.1 – 10.41.154.12610.41.154.127
5410.41.154.128/2510.41.154.129 – 10.41.154.25410.41.154.255
5510.41.155.0/2510.41.155.1 – 10.41.155.12610.41.155.127
5610.41.155.128/2510.41.155.129 – 10.41.155.25410.41.155.255
5710.41.156.0/2510.41.156.1 – 10.41.156.12610.41.156.127
5810.41.156.128/2510.41.156.129 – 10.41.156.25410.41.156.255
5910.41.157.0/2510.41.157.1 – 10.41.157.12610.41.157.127
6010.41.157.128/2510.41.157.129 – 10.41.157.25410.41.157.255
6110.41.158.0/2510.41.158.1 – 10.41.158.12610.41.158.127
6210.41.158.128/2510.41.158.129 – 10.41.158.25410.41.158.255
6310.41.159.0/2510.41.159.1 – 10.41.159.12610.41.159.127
6410.41.159.128/2510.41.159.129 – 10.41.159.25410.41.159.255
6510.41.160.0/2510.41.160.1 – 10.41.160.12610.41.160.127
6610.41.160.128/2510.41.160.129 – 10.41.160.25410.41.160.255
6710.41.161.0/2510.41.161.1 – 10.41.161.12610.41.161.127
6810.41.161.128/2510.41.161.129 – 10.41.161.25410.41.161.255
6910.41.162.0/2510.41.162.1 – 10.41.162.12610.41.162.127
7010.41.162.128/2510.41.162.129 – 10.41.162.25410.41.162.255
7110.41.163.0/2510.41.163.1 – 10.41.163.12610.41.163.127
7210.41.163.128/2510.41.163.129 – 10.41.163.25410.41.163.255
7310.41.164.0/2510.41.164.1 – 10.41.164.12610.41.164.127
7410.41.164.128/2510.41.164.129 – 10.41.164.25410.41.164.255
7510.41.165.0/2510.41.165.1 – 10.41.165.12610.41.165.127
7610.41.165.128/2510.41.165.129 – 10.41.165.25410.41.165.255
7710.41.166.0/2510.41.166.1 – 10.41.166.12610.41.166.127
7810.41.166.128/2510.41.166.129 – 10.41.166.25410.41.166.255
7910.41.167.0/2510.41.167.1 – 10.41.167.12610.41.167.127
8010.41.167.128/2510.41.167.129 – 10.41.167.25410.41.167.255
8110.41.168.0/2510.41.168.1 – 10.41.168.12610.41.168.127
8210.41.168.128/2510.41.168.129 – 10.41.168.25410.41.168.255
8310.41.169.0/2510.41.169.1 – 10.41.169.12610.41.169.127
8410.41.169.128/2510.41.169.129 – 10.41.169.25410.41.169.255
8510.41.170.0/2510.41.170.1 – 10.41.170.12610.41.170.127
8610.41.170.128/2510.41.170.129 – 10.41.170.25410.41.170.255
8710.41.171.0/2510.41.171.1 – 10.41.171.12610.41.171.127
8810.41.171.128/2510.41.171.129 – 10.41.171.25410.41.171.255
8910.41.172.0/2510.41.172.1 – 10.41.172.12610.41.172.127
9010.41.172.128/2510.41.172.129 – 10.41.172.25410.41.172.255
9110.41.173.0/2510.41.173.1 – 10.41.173.12610.41.173.127
9210.41.173.128/2510.41.173.129 – 10.41.173.25410.41.173.255
9310.41.174.0/2510.41.174.1 – 10.41.174.12610.41.174.127
9410.41.174.128/2510.41.174.129 – 10.41.174.25410.41.174.255
9510.41.175.0/2510.41.175.1 – 10.41.175.12610.41.175.127
9610.41.175.128/2510.41.175.129 – 10.41.175.25410.41.175.255
9710.41.176.0/2510.41.176.1 – 10.41.176.12610.41.176.127
9810.41.176.128/2510.41.176.129 – 10.41.176.25410.41.176.255
9910.41.177.0/2510.41.177.1 – 10.41.177.12610.41.177.127
10010.41.177.128/2510.41.177.129 – 10.41.177.25410.41.177.255
10110.41.178.0/2510.41.178.1 – 10.41.178.12610.41.178.127
10210.41.178.128/2510.41.178.129 – 10.41.178.25410.41.178.255
10310.41.179.0/2510.41.179.1 – 10.41.179.12610.41.179.127
10410.41.179.128/2510.41.179.129 – 10.41.179.25410.41.179.255
10510.41.180.0/2510.41.180.1 – 10.41.180.12610.41.180.127
10610.41.180.128/2510.41.180.129 – 10.41.180.25410.41.180.255
10710.41.181.0/2510.41.181.1 – 10.41.181.12610.41.181.127
10810.41.181.128/2510.41.181.129 – 10.41.181.25410.41.181.255
10910.41.182.0/2510.41.182.1 – 10.41.182.12610.41.182.127
11010.41.182.128/2510.41.182.129 – 10.41.182.25410.41.182.255
11110.41.183.0/2510.41.183.1 – 10.41.183.12610.41.183.127
11210.41.183.128/2510.41.183.129 – 10.41.183.25410.41.183.255
11310.41.184.0/2510.41.184.1 – 10.41.184.12610.41.184.127
11410.41.184.128/2510.41.184.129 – 10.41.184.25410.41.184.255
11510.41.185.0/2510.41.185.1 – 10.41.185.12610.41.185.127
11610.41.185.128/2510.41.185.129 – 10.41.185.25410.41.185.255
11710.41.186.0/2510.41.186.1 – 10.41.186.12610.41.186.127
11810.41.186.128/2510.41.186.129 – 10.41.186.25410.41.186.255
11910.41.187.0/2510.41.187.1 – 10.41.187.12610.41.187.127
12010.41.187.128/2510.41.187.129 – 10.41.187.25410.41.187.255
12110.41.188.0/2510.41.188.1 – 10.41.188.12610.41.188.127
12210.41.188.128/2510.41.188.129 – 10.41.188.25410.41.188.255
12310.41.189.0/2510.41.189.1 – 10.41.189.12610.41.189.127
12410.41.189.128/2510.41.189.129 – 10.41.189.25410.41.189.255
12510.41.190.0/2510.41.190.1 – 10.41.190.12610.41.190.127
12610.41.190.128/2510.41.190.129 – 10.41.190.25410.41.190.255
12710.41.191.0/2510.41.191.1 – 10.41.191.12610.41.191.127
12810.41.191.128/2510.41.191.129 – 10.41.191.25410.41.191.255
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 →