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)10.68.128.0/17
network10.68.128.0/17
broadcast10.68.255.255
first host10.68.128.1
last host10.68.255.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.68.128.0/17
address00001010.01000100.10000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01000100.10000000.00000000
broadcast00001010.01000100.11111111.11111111
green = network part, grey = host part
hex0x0a448000
decimal172261376
reverse dns0.128.68.10.in-addr.arpa
ipv4-mapped::ffff:a44:8000

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.68.128.0/2410.68.128.1 – 10.68.128.25410.68.128.255
210.68.129.0/2410.68.129.1 – 10.68.129.25410.68.129.255
310.68.130.0/2410.68.130.1 – 10.68.130.25410.68.130.255
410.68.131.0/2410.68.131.1 – 10.68.131.25410.68.131.255
510.68.132.0/2410.68.132.1 – 10.68.132.25410.68.132.255
610.68.133.0/2410.68.133.1 – 10.68.133.25410.68.133.255
710.68.134.0/2410.68.134.1 – 10.68.134.25410.68.134.255
810.68.135.0/2410.68.135.1 – 10.68.135.25410.68.135.255
910.68.136.0/2410.68.136.1 – 10.68.136.25410.68.136.255
1010.68.137.0/2410.68.137.1 – 10.68.137.25410.68.137.255
1110.68.138.0/2410.68.138.1 – 10.68.138.25410.68.138.255
1210.68.139.0/2410.68.139.1 – 10.68.139.25410.68.139.255
1310.68.140.0/2410.68.140.1 – 10.68.140.25410.68.140.255
1410.68.141.0/2410.68.141.1 – 10.68.141.25410.68.141.255
1510.68.142.0/2410.68.142.1 – 10.68.142.25410.68.142.255
1610.68.143.0/2410.68.143.1 – 10.68.143.25410.68.143.255
1710.68.144.0/2410.68.144.1 – 10.68.144.25410.68.144.255
1810.68.145.0/2410.68.145.1 – 10.68.145.25410.68.145.255
1910.68.146.0/2410.68.146.1 – 10.68.146.25410.68.146.255
2010.68.147.0/2410.68.147.1 – 10.68.147.25410.68.147.255
2110.68.148.0/2410.68.148.1 – 10.68.148.25410.68.148.255
2210.68.149.0/2410.68.149.1 – 10.68.149.25410.68.149.255
2310.68.150.0/2410.68.150.1 – 10.68.150.25410.68.150.255
2410.68.151.0/2410.68.151.1 – 10.68.151.25410.68.151.255
2510.68.152.0/2410.68.152.1 – 10.68.152.25410.68.152.255
2610.68.153.0/2410.68.153.1 – 10.68.153.25410.68.153.255
2710.68.154.0/2410.68.154.1 – 10.68.154.25410.68.154.255
2810.68.155.0/2410.68.155.1 – 10.68.155.25410.68.155.255
2910.68.156.0/2410.68.156.1 – 10.68.156.25410.68.156.255
3010.68.157.0/2410.68.157.1 – 10.68.157.25410.68.157.255
3110.68.158.0/2410.68.158.1 – 10.68.158.25410.68.158.255
3210.68.159.0/2410.68.159.1 – 10.68.159.25410.68.159.255
3310.68.160.0/2410.68.160.1 – 10.68.160.25410.68.160.255
3410.68.161.0/2410.68.161.1 – 10.68.161.25410.68.161.255
3510.68.162.0/2410.68.162.1 – 10.68.162.25410.68.162.255
3610.68.163.0/2410.68.163.1 – 10.68.163.25410.68.163.255
3710.68.164.0/2410.68.164.1 – 10.68.164.25410.68.164.255
3810.68.165.0/2410.68.165.1 – 10.68.165.25410.68.165.255
3910.68.166.0/2410.68.166.1 – 10.68.166.25410.68.166.255
4010.68.167.0/2410.68.167.1 – 10.68.167.25410.68.167.255
4110.68.168.0/2410.68.168.1 – 10.68.168.25410.68.168.255
4210.68.169.0/2410.68.169.1 – 10.68.169.25410.68.169.255
4310.68.170.0/2410.68.170.1 – 10.68.170.25410.68.170.255
4410.68.171.0/2410.68.171.1 – 10.68.171.25410.68.171.255
4510.68.172.0/2410.68.172.1 – 10.68.172.25410.68.172.255
4610.68.173.0/2410.68.173.1 – 10.68.173.25410.68.173.255
4710.68.174.0/2410.68.174.1 – 10.68.174.25410.68.174.255
4810.68.175.0/2410.68.175.1 – 10.68.175.25410.68.175.255
4910.68.176.0/2410.68.176.1 – 10.68.176.25410.68.176.255
5010.68.177.0/2410.68.177.1 – 10.68.177.25410.68.177.255
5110.68.178.0/2410.68.178.1 – 10.68.178.25410.68.178.255
5210.68.179.0/2410.68.179.1 – 10.68.179.25410.68.179.255
5310.68.180.0/2410.68.180.1 – 10.68.180.25410.68.180.255
5410.68.181.0/2410.68.181.1 – 10.68.181.25410.68.181.255
5510.68.182.0/2410.68.182.1 – 10.68.182.25410.68.182.255
5610.68.183.0/2410.68.183.1 – 10.68.183.25410.68.183.255
5710.68.184.0/2410.68.184.1 – 10.68.184.25410.68.184.255
5810.68.185.0/2410.68.185.1 – 10.68.185.25410.68.185.255
5910.68.186.0/2410.68.186.1 – 10.68.186.25410.68.186.255
6010.68.187.0/2410.68.187.1 – 10.68.187.25410.68.187.255
6110.68.188.0/2410.68.188.1 – 10.68.188.25410.68.188.255
6210.68.189.0/2410.68.189.1 – 10.68.189.25410.68.189.255
6310.68.190.0/2410.68.190.1 – 10.68.190.25410.68.190.255
6410.68.191.0/2410.68.191.1 – 10.68.191.25410.68.191.255
6510.68.192.0/2410.68.192.1 – 10.68.192.25410.68.192.255
6610.68.193.0/2410.68.193.1 – 10.68.193.25410.68.193.255
6710.68.194.0/2410.68.194.1 – 10.68.194.25410.68.194.255
6810.68.195.0/2410.68.195.1 – 10.68.195.25410.68.195.255
6910.68.196.0/2410.68.196.1 – 10.68.196.25410.68.196.255
7010.68.197.0/2410.68.197.1 – 10.68.197.25410.68.197.255
7110.68.198.0/2410.68.198.1 – 10.68.198.25410.68.198.255
7210.68.199.0/2410.68.199.1 – 10.68.199.25410.68.199.255
7310.68.200.0/2410.68.200.1 – 10.68.200.25410.68.200.255
7410.68.201.0/2410.68.201.1 – 10.68.201.25410.68.201.255
7510.68.202.0/2410.68.202.1 – 10.68.202.25410.68.202.255
7610.68.203.0/2410.68.203.1 – 10.68.203.25410.68.203.255
7710.68.204.0/2410.68.204.1 – 10.68.204.25410.68.204.255
7810.68.205.0/2410.68.205.1 – 10.68.205.25410.68.205.255
7910.68.206.0/2410.68.206.1 – 10.68.206.25410.68.206.255
8010.68.207.0/2410.68.207.1 – 10.68.207.25410.68.207.255
8110.68.208.0/2410.68.208.1 – 10.68.208.25410.68.208.255
8210.68.209.0/2410.68.209.1 – 10.68.209.25410.68.209.255
8310.68.210.0/2410.68.210.1 – 10.68.210.25410.68.210.255
8410.68.211.0/2410.68.211.1 – 10.68.211.25410.68.211.255
8510.68.212.0/2410.68.212.1 – 10.68.212.25410.68.212.255
8610.68.213.0/2410.68.213.1 – 10.68.213.25410.68.213.255
8710.68.214.0/2410.68.214.1 – 10.68.214.25410.68.214.255
8810.68.215.0/2410.68.215.1 – 10.68.215.25410.68.215.255
8910.68.216.0/2410.68.216.1 – 10.68.216.25410.68.216.255
9010.68.217.0/2410.68.217.1 – 10.68.217.25410.68.217.255
9110.68.218.0/2410.68.218.1 – 10.68.218.25410.68.218.255
9210.68.219.0/2410.68.219.1 – 10.68.219.25410.68.219.255
9310.68.220.0/2410.68.220.1 – 10.68.220.25410.68.220.255
9410.68.221.0/2410.68.221.1 – 10.68.221.25410.68.221.255
9510.68.222.0/2410.68.222.1 – 10.68.222.25410.68.222.255
9610.68.223.0/2410.68.223.1 – 10.68.223.25410.68.223.255
9710.68.224.0/2410.68.224.1 – 10.68.224.25410.68.224.255
9810.68.225.0/2410.68.225.1 – 10.68.225.25410.68.225.255
9910.68.226.0/2410.68.226.1 – 10.68.226.25410.68.226.255
10010.68.227.0/2410.68.227.1 – 10.68.227.25410.68.227.255
10110.68.228.0/2410.68.228.1 – 10.68.228.25410.68.228.255
10210.68.229.0/2410.68.229.1 – 10.68.229.25410.68.229.255
10310.68.230.0/2410.68.230.1 – 10.68.230.25410.68.230.255
10410.68.231.0/2410.68.231.1 – 10.68.231.25410.68.231.255
10510.68.232.0/2410.68.232.1 – 10.68.232.25410.68.232.255
10610.68.233.0/2410.68.233.1 – 10.68.233.25410.68.233.255
10710.68.234.0/2410.68.234.1 – 10.68.234.25410.68.234.255
10810.68.235.0/2410.68.235.1 – 10.68.235.25410.68.235.255
10910.68.236.0/2410.68.236.1 – 10.68.236.25410.68.236.255
11010.68.237.0/2410.68.237.1 – 10.68.237.25410.68.237.255
11110.68.238.0/2410.68.238.1 – 10.68.238.25410.68.238.255
11210.68.239.0/2410.68.239.1 – 10.68.239.25410.68.239.255
11310.68.240.0/2410.68.240.1 – 10.68.240.25410.68.240.255
11410.68.241.0/2410.68.241.1 – 10.68.241.25410.68.241.255
11510.68.242.0/2410.68.242.1 – 10.68.242.25410.68.242.255
11610.68.243.0/2410.68.243.1 – 10.68.243.25410.68.243.255
11710.68.244.0/2410.68.244.1 – 10.68.244.25410.68.244.255
11810.68.245.0/2410.68.245.1 – 10.68.245.25410.68.245.255
11910.68.246.0/2410.68.246.1 – 10.68.246.25410.68.246.255
12010.68.247.0/2410.68.247.1 – 10.68.247.25410.68.247.255
12110.68.248.0/2410.68.248.1 – 10.68.248.25410.68.248.255
12210.68.249.0/2410.68.249.1 – 10.68.249.25410.68.249.255
12310.68.250.0/2410.68.250.1 – 10.68.250.25410.68.250.255
12410.68.251.0/2410.68.251.1 – 10.68.251.25410.68.251.255
12510.68.252.0/2410.68.252.1 – 10.68.252.25410.68.252.255
12610.68.253.0/2410.68.253.1 – 10.68.253.25410.68.253.255
12710.68.254.0/2410.68.254.1 – 10.68.254.25410.68.254.255
12810.68.255.0/2410.68.255.1 – 10.68.255.25410.68.255.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /17
/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-
/17255.255.128.032,76832,7661
/18255.255.192.016,38416,3822 split →
/19255.255.224.08,1928,1904 split →
/20255.255.240.04,0964,0948 split →
/21255.255.248.02,0482,04616 split →
/22255.255.252.01,0241,02232 split →
/23255.255.254.051251064 split →
/24255.255.255.0256254128 split →
/25255.255.255.128128126256 split →
/26255.255.255.1926462512 split →
/27255.255.255.22432301,024 split →
/28255.255.255.24016142,048 split →
/29255.255.255.248864,096 split →
/30255.255.255.252428,192 split →
/31255.255.255.2542216,384 split →
/32255.255.255.2551132,768 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 →