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)10.25.128.0/17
network10.25.128.0/17
broadcast10.25.255.255
first host10.25.128.1
last host10.25.255.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.25.128.0/17
address00001010.00011001.10000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.00011001.10000000.00000000
broadcast00001010.00011001.11111111.11111111
green = network part, grey = host part
hex0x0a198000
decimal169443328
reverse dns0.128.25.10.in-addr.arpa
ipv4-mapped::ffff:a19:8000

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.25.128.0/2410.25.128.1 – 10.25.128.25410.25.128.255
210.25.129.0/2410.25.129.1 – 10.25.129.25410.25.129.255
310.25.130.0/2410.25.130.1 – 10.25.130.25410.25.130.255
410.25.131.0/2410.25.131.1 – 10.25.131.25410.25.131.255
510.25.132.0/2410.25.132.1 – 10.25.132.25410.25.132.255
610.25.133.0/2410.25.133.1 – 10.25.133.25410.25.133.255
710.25.134.0/2410.25.134.1 – 10.25.134.25410.25.134.255
810.25.135.0/2410.25.135.1 – 10.25.135.25410.25.135.255
910.25.136.0/2410.25.136.1 – 10.25.136.25410.25.136.255
1010.25.137.0/2410.25.137.1 – 10.25.137.25410.25.137.255
1110.25.138.0/2410.25.138.1 – 10.25.138.25410.25.138.255
1210.25.139.0/2410.25.139.1 – 10.25.139.25410.25.139.255
1310.25.140.0/2410.25.140.1 – 10.25.140.25410.25.140.255
1410.25.141.0/2410.25.141.1 – 10.25.141.25410.25.141.255
1510.25.142.0/2410.25.142.1 – 10.25.142.25410.25.142.255
1610.25.143.0/2410.25.143.1 – 10.25.143.25410.25.143.255
1710.25.144.0/2410.25.144.1 – 10.25.144.25410.25.144.255
1810.25.145.0/2410.25.145.1 – 10.25.145.25410.25.145.255
1910.25.146.0/2410.25.146.1 – 10.25.146.25410.25.146.255
2010.25.147.0/2410.25.147.1 – 10.25.147.25410.25.147.255
2110.25.148.0/2410.25.148.1 – 10.25.148.25410.25.148.255
2210.25.149.0/2410.25.149.1 – 10.25.149.25410.25.149.255
2310.25.150.0/2410.25.150.1 – 10.25.150.25410.25.150.255
2410.25.151.0/2410.25.151.1 – 10.25.151.25410.25.151.255
2510.25.152.0/2410.25.152.1 – 10.25.152.25410.25.152.255
2610.25.153.0/2410.25.153.1 – 10.25.153.25410.25.153.255
2710.25.154.0/2410.25.154.1 – 10.25.154.25410.25.154.255
2810.25.155.0/2410.25.155.1 – 10.25.155.25410.25.155.255
2910.25.156.0/2410.25.156.1 – 10.25.156.25410.25.156.255
3010.25.157.0/2410.25.157.1 – 10.25.157.25410.25.157.255
3110.25.158.0/2410.25.158.1 – 10.25.158.25410.25.158.255
3210.25.159.0/2410.25.159.1 – 10.25.159.25410.25.159.255
3310.25.160.0/2410.25.160.1 – 10.25.160.25410.25.160.255
3410.25.161.0/2410.25.161.1 – 10.25.161.25410.25.161.255
3510.25.162.0/2410.25.162.1 – 10.25.162.25410.25.162.255
3610.25.163.0/2410.25.163.1 – 10.25.163.25410.25.163.255
3710.25.164.0/2410.25.164.1 – 10.25.164.25410.25.164.255
3810.25.165.0/2410.25.165.1 – 10.25.165.25410.25.165.255
3910.25.166.0/2410.25.166.1 – 10.25.166.25410.25.166.255
4010.25.167.0/2410.25.167.1 – 10.25.167.25410.25.167.255
4110.25.168.0/2410.25.168.1 – 10.25.168.25410.25.168.255
4210.25.169.0/2410.25.169.1 – 10.25.169.25410.25.169.255
4310.25.170.0/2410.25.170.1 – 10.25.170.25410.25.170.255
4410.25.171.0/2410.25.171.1 – 10.25.171.25410.25.171.255
4510.25.172.0/2410.25.172.1 – 10.25.172.25410.25.172.255
4610.25.173.0/2410.25.173.1 – 10.25.173.25410.25.173.255
4710.25.174.0/2410.25.174.1 – 10.25.174.25410.25.174.255
4810.25.175.0/2410.25.175.1 – 10.25.175.25410.25.175.255
4910.25.176.0/2410.25.176.1 – 10.25.176.25410.25.176.255
5010.25.177.0/2410.25.177.1 – 10.25.177.25410.25.177.255
5110.25.178.0/2410.25.178.1 – 10.25.178.25410.25.178.255
5210.25.179.0/2410.25.179.1 – 10.25.179.25410.25.179.255
5310.25.180.0/2410.25.180.1 – 10.25.180.25410.25.180.255
5410.25.181.0/2410.25.181.1 – 10.25.181.25410.25.181.255
5510.25.182.0/2410.25.182.1 – 10.25.182.25410.25.182.255
5610.25.183.0/2410.25.183.1 – 10.25.183.25410.25.183.255
5710.25.184.0/2410.25.184.1 – 10.25.184.25410.25.184.255
5810.25.185.0/2410.25.185.1 – 10.25.185.25410.25.185.255
5910.25.186.0/2410.25.186.1 – 10.25.186.25410.25.186.255
6010.25.187.0/2410.25.187.1 – 10.25.187.25410.25.187.255
6110.25.188.0/2410.25.188.1 – 10.25.188.25410.25.188.255
6210.25.189.0/2410.25.189.1 – 10.25.189.25410.25.189.255
6310.25.190.0/2410.25.190.1 – 10.25.190.25410.25.190.255
6410.25.191.0/2410.25.191.1 – 10.25.191.25410.25.191.255
6510.25.192.0/2410.25.192.1 – 10.25.192.25410.25.192.255
6610.25.193.0/2410.25.193.1 – 10.25.193.25410.25.193.255
6710.25.194.0/2410.25.194.1 – 10.25.194.25410.25.194.255
6810.25.195.0/2410.25.195.1 – 10.25.195.25410.25.195.255
6910.25.196.0/2410.25.196.1 – 10.25.196.25410.25.196.255
7010.25.197.0/2410.25.197.1 – 10.25.197.25410.25.197.255
7110.25.198.0/2410.25.198.1 – 10.25.198.25410.25.198.255
7210.25.199.0/2410.25.199.1 – 10.25.199.25410.25.199.255
7310.25.200.0/2410.25.200.1 – 10.25.200.25410.25.200.255
7410.25.201.0/2410.25.201.1 – 10.25.201.25410.25.201.255
7510.25.202.0/2410.25.202.1 – 10.25.202.25410.25.202.255
7610.25.203.0/2410.25.203.1 – 10.25.203.25410.25.203.255
7710.25.204.0/2410.25.204.1 – 10.25.204.25410.25.204.255
7810.25.205.0/2410.25.205.1 – 10.25.205.25410.25.205.255
7910.25.206.0/2410.25.206.1 – 10.25.206.25410.25.206.255
8010.25.207.0/2410.25.207.1 – 10.25.207.25410.25.207.255
8110.25.208.0/2410.25.208.1 – 10.25.208.25410.25.208.255
8210.25.209.0/2410.25.209.1 – 10.25.209.25410.25.209.255
8310.25.210.0/2410.25.210.1 – 10.25.210.25410.25.210.255
8410.25.211.0/2410.25.211.1 – 10.25.211.25410.25.211.255
8510.25.212.0/2410.25.212.1 – 10.25.212.25410.25.212.255
8610.25.213.0/2410.25.213.1 – 10.25.213.25410.25.213.255
8710.25.214.0/2410.25.214.1 – 10.25.214.25410.25.214.255
8810.25.215.0/2410.25.215.1 – 10.25.215.25410.25.215.255
8910.25.216.0/2410.25.216.1 – 10.25.216.25410.25.216.255
9010.25.217.0/2410.25.217.1 – 10.25.217.25410.25.217.255
9110.25.218.0/2410.25.218.1 – 10.25.218.25410.25.218.255
9210.25.219.0/2410.25.219.1 – 10.25.219.25410.25.219.255
9310.25.220.0/2410.25.220.1 – 10.25.220.25410.25.220.255
9410.25.221.0/2410.25.221.1 – 10.25.221.25410.25.221.255
9510.25.222.0/2410.25.222.1 – 10.25.222.25410.25.222.255
9610.25.223.0/2410.25.223.1 – 10.25.223.25410.25.223.255
9710.25.224.0/2410.25.224.1 – 10.25.224.25410.25.224.255
9810.25.225.0/2410.25.225.1 – 10.25.225.25410.25.225.255
9910.25.226.0/2410.25.226.1 – 10.25.226.25410.25.226.255
10010.25.227.0/2410.25.227.1 – 10.25.227.25410.25.227.255
10110.25.228.0/2410.25.228.1 – 10.25.228.25410.25.228.255
10210.25.229.0/2410.25.229.1 – 10.25.229.25410.25.229.255
10310.25.230.0/2410.25.230.1 – 10.25.230.25410.25.230.255
10410.25.231.0/2410.25.231.1 – 10.25.231.25410.25.231.255
10510.25.232.0/2410.25.232.1 – 10.25.232.25410.25.232.255
10610.25.233.0/2410.25.233.1 – 10.25.233.25410.25.233.255
10710.25.234.0/2410.25.234.1 – 10.25.234.25410.25.234.255
10810.25.235.0/2410.25.235.1 – 10.25.235.25410.25.235.255
10910.25.236.0/2410.25.236.1 – 10.25.236.25410.25.236.255
11010.25.237.0/2410.25.237.1 – 10.25.237.25410.25.237.255
11110.25.238.0/2410.25.238.1 – 10.25.238.25410.25.238.255
11210.25.239.0/2410.25.239.1 – 10.25.239.25410.25.239.255
11310.25.240.0/2410.25.240.1 – 10.25.240.25410.25.240.255
11410.25.241.0/2410.25.241.1 – 10.25.241.25410.25.241.255
11510.25.242.0/2410.25.242.1 – 10.25.242.25410.25.242.255
11610.25.243.0/2410.25.243.1 – 10.25.243.25410.25.243.255
11710.25.244.0/2410.25.244.1 – 10.25.244.25410.25.244.255
11810.25.245.0/2410.25.245.1 – 10.25.245.25410.25.245.255
11910.25.246.0/2410.25.246.1 – 10.25.246.25410.25.246.255
12010.25.247.0/2410.25.247.1 – 10.25.247.25410.25.247.255
12110.25.248.0/2410.25.248.1 – 10.25.248.25410.25.248.255
12210.25.249.0/2410.25.249.1 – 10.25.249.25410.25.249.255
12310.25.250.0/2410.25.250.1 – 10.25.250.25410.25.250.255
12410.25.251.0/2410.25.251.1 – 10.25.251.25410.25.251.255
12510.25.252.0/2410.25.252.1 – 10.25.252.25410.25.252.255
12610.25.253.0/2410.25.253.1 – 10.25.253.25410.25.253.255
12710.25.254.0/2410.25.254.1 – 10.25.254.25410.25.254.255
12810.25.255.0/2410.25.255.1 – 10.25.255.25410.25.255.255
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 →