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)10.27.128.0/17
network10.27.128.0/17
broadcast10.27.255.255
first host10.27.128.1
last host10.27.255.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.27.128.0/17
address00001010.00011011.10000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.00011011.10000000.00000000
broadcast00001010.00011011.11111111.11111111
green = network part, grey = host part
hex0x0a1b8000
decimal169574400
reverse dns0.128.27.10.in-addr.arpa
ipv4-mapped::ffff:a1b:8000

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.27.128.0/2410.27.128.1 – 10.27.128.25410.27.128.255
210.27.129.0/2410.27.129.1 – 10.27.129.25410.27.129.255
310.27.130.0/2410.27.130.1 – 10.27.130.25410.27.130.255
410.27.131.0/2410.27.131.1 – 10.27.131.25410.27.131.255
510.27.132.0/2410.27.132.1 – 10.27.132.25410.27.132.255
610.27.133.0/2410.27.133.1 – 10.27.133.25410.27.133.255
710.27.134.0/2410.27.134.1 – 10.27.134.25410.27.134.255
810.27.135.0/2410.27.135.1 – 10.27.135.25410.27.135.255
910.27.136.0/2410.27.136.1 – 10.27.136.25410.27.136.255
1010.27.137.0/2410.27.137.1 – 10.27.137.25410.27.137.255
1110.27.138.0/2410.27.138.1 – 10.27.138.25410.27.138.255
1210.27.139.0/2410.27.139.1 – 10.27.139.25410.27.139.255
1310.27.140.0/2410.27.140.1 – 10.27.140.25410.27.140.255
1410.27.141.0/2410.27.141.1 – 10.27.141.25410.27.141.255
1510.27.142.0/2410.27.142.1 – 10.27.142.25410.27.142.255
1610.27.143.0/2410.27.143.1 – 10.27.143.25410.27.143.255
1710.27.144.0/2410.27.144.1 – 10.27.144.25410.27.144.255
1810.27.145.0/2410.27.145.1 – 10.27.145.25410.27.145.255
1910.27.146.0/2410.27.146.1 – 10.27.146.25410.27.146.255
2010.27.147.0/2410.27.147.1 – 10.27.147.25410.27.147.255
2110.27.148.0/2410.27.148.1 – 10.27.148.25410.27.148.255
2210.27.149.0/2410.27.149.1 – 10.27.149.25410.27.149.255
2310.27.150.0/2410.27.150.1 – 10.27.150.25410.27.150.255
2410.27.151.0/2410.27.151.1 – 10.27.151.25410.27.151.255
2510.27.152.0/2410.27.152.1 – 10.27.152.25410.27.152.255
2610.27.153.0/2410.27.153.1 – 10.27.153.25410.27.153.255
2710.27.154.0/2410.27.154.1 – 10.27.154.25410.27.154.255
2810.27.155.0/2410.27.155.1 – 10.27.155.25410.27.155.255
2910.27.156.0/2410.27.156.1 – 10.27.156.25410.27.156.255
3010.27.157.0/2410.27.157.1 – 10.27.157.25410.27.157.255
3110.27.158.0/2410.27.158.1 – 10.27.158.25410.27.158.255
3210.27.159.0/2410.27.159.1 – 10.27.159.25410.27.159.255
3310.27.160.0/2410.27.160.1 – 10.27.160.25410.27.160.255
3410.27.161.0/2410.27.161.1 – 10.27.161.25410.27.161.255
3510.27.162.0/2410.27.162.1 – 10.27.162.25410.27.162.255
3610.27.163.0/2410.27.163.1 – 10.27.163.25410.27.163.255
3710.27.164.0/2410.27.164.1 – 10.27.164.25410.27.164.255
3810.27.165.0/2410.27.165.1 – 10.27.165.25410.27.165.255
3910.27.166.0/2410.27.166.1 – 10.27.166.25410.27.166.255
4010.27.167.0/2410.27.167.1 – 10.27.167.25410.27.167.255
4110.27.168.0/2410.27.168.1 – 10.27.168.25410.27.168.255
4210.27.169.0/2410.27.169.1 – 10.27.169.25410.27.169.255
4310.27.170.0/2410.27.170.1 – 10.27.170.25410.27.170.255
4410.27.171.0/2410.27.171.1 – 10.27.171.25410.27.171.255
4510.27.172.0/2410.27.172.1 – 10.27.172.25410.27.172.255
4610.27.173.0/2410.27.173.1 – 10.27.173.25410.27.173.255
4710.27.174.0/2410.27.174.1 – 10.27.174.25410.27.174.255
4810.27.175.0/2410.27.175.1 – 10.27.175.25410.27.175.255
4910.27.176.0/2410.27.176.1 – 10.27.176.25410.27.176.255
5010.27.177.0/2410.27.177.1 – 10.27.177.25410.27.177.255
5110.27.178.0/2410.27.178.1 – 10.27.178.25410.27.178.255
5210.27.179.0/2410.27.179.1 – 10.27.179.25410.27.179.255
5310.27.180.0/2410.27.180.1 – 10.27.180.25410.27.180.255
5410.27.181.0/2410.27.181.1 – 10.27.181.25410.27.181.255
5510.27.182.0/2410.27.182.1 – 10.27.182.25410.27.182.255
5610.27.183.0/2410.27.183.1 – 10.27.183.25410.27.183.255
5710.27.184.0/2410.27.184.1 – 10.27.184.25410.27.184.255
5810.27.185.0/2410.27.185.1 – 10.27.185.25410.27.185.255
5910.27.186.0/2410.27.186.1 – 10.27.186.25410.27.186.255
6010.27.187.0/2410.27.187.1 – 10.27.187.25410.27.187.255
6110.27.188.0/2410.27.188.1 – 10.27.188.25410.27.188.255
6210.27.189.0/2410.27.189.1 – 10.27.189.25410.27.189.255
6310.27.190.0/2410.27.190.1 – 10.27.190.25410.27.190.255
6410.27.191.0/2410.27.191.1 – 10.27.191.25410.27.191.255
6510.27.192.0/2410.27.192.1 – 10.27.192.25410.27.192.255
6610.27.193.0/2410.27.193.1 – 10.27.193.25410.27.193.255
6710.27.194.0/2410.27.194.1 – 10.27.194.25410.27.194.255
6810.27.195.0/2410.27.195.1 – 10.27.195.25410.27.195.255
6910.27.196.0/2410.27.196.1 – 10.27.196.25410.27.196.255
7010.27.197.0/2410.27.197.1 – 10.27.197.25410.27.197.255
7110.27.198.0/2410.27.198.1 – 10.27.198.25410.27.198.255
7210.27.199.0/2410.27.199.1 – 10.27.199.25410.27.199.255
7310.27.200.0/2410.27.200.1 – 10.27.200.25410.27.200.255
7410.27.201.0/2410.27.201.1 – 10.27.201.25410.27.201.255
7510.27.202.0/2410.27.202.1 – 10.27.202.25410.27.202.255
7610.27.203.0/2410.27.203.1 – 10.27.203.25410.27.203.255
7710.27.204.0/2410.27.204.1 – 10.27.204.25410.27.204.255
7810.27.205.0/2410.27.205.1 – 10.27.205.25410.27.205.255
7910.27.206.0/2410.27.206.1 – 10.27.206.25410.27.206.255
8010.27.207.0/2410.27.207.1 – 10.27.207.25410.27.207.255
8110.27.208.0/2410.27.208.1 – 10.27.208.25410.27.208.255
8210.27.209.0/2410.27.209.1 – 10.27.209.25410.27.209.255
8310.27.210.0/2410.27.210.1 – 10.27.210.25410.27.210.255
8410.27.211.0/2410.27.211.1 – 10.27.211.25410.27.211.255
8510.27.212.0/2410.27.212.1 – 10.27.212.25410.27.212.255
8610.27.213.0/2410.27.213.1 – 10.27.213.25410.27.213.255
8710.27.214.0/2410.27.214.1 – 10.27.214.25410.27.214.255
8810.27.215.0/2410.27.215.1 – 10.27.215.25410.27.215.255
8910.27.216.0/2410.27.216.1 – 10.27.216.25410.27.216.255
9010.27.217.0/2410.27.217.1 – 10.27.217.25410.27.217.255
9110.27.218.0/2410.27.218.1 – 10.27.218.25410.27.218.255
9210.27.219.0/2410.27.219.1 – 10.27.219.25410.27.219.255
9310.27.220.0/2410.27.220.1 – 10.27.220.25410.27.220.255
9410.27.221.0/2410.27.221.1 – 10.27.221.25410.27.221.255
9510.27.222.0/2410.27.222.1 – 10.27.222.25410.27.222.255
9610.27.223.0/2410.27.223.1 – 10.27.223.25410.27.223.255
9710.27.224.0/2410.27.224.1 – 10.27.224.25410.27.224.255
9810.27.225.0/2410.27.225.1 – 10.27.225.25410.27.225.255
9910.27.226.0/2410.27.226.1 – 10.27.226.25410.27.226.255
10010.27.227.0/2410.27.227.1 – 10.27.227.25410.27.227.255
10110.27.228.0/2410.27.228.1 – 10.27.228.25410.27.228.255
10210.27.229.0/2410.27.229.1 – 10.27.229.25410.27.229.255
10310.27.230.0/2410.27.230.1 – 10.27.230.25410.27.230.255
10410.27.231.0/2410.27.231.1 – 10.27.231.25410.27.231.255
10510.27.232.0/2410.27.232.1 – 10.27.232.25410.27.232.255
10610.27.233.0/2410.27.233.1 – 10.27.233.25410.27.233.255
10710.27.234.0/2410.27.234.1 – 10.27.234.25410.27.234.255
10810.27.235.0/2410.27.235.1 – 10.27.235.25410.27.235.255
10910.27.236.0/2410.27.236.1 – 10.27.236.25410.27.236.255
11010.27.237.0/2410.27.237.1 – 10.27.237.25410.27.237.255
11110.27.238.0/2410.27.238.1 – 10.27.238.25410.27.238.255
11210.27.239.0/2410.27.239.1 – 10.27.239.25410.27.239.255
11310.27.240.0/2410.27.240.1 – 10.27.240.25410.27.240.255
11410.27.241.0/2410.27.241.1 – 10.27.241.25410.27.241.255
11510.27.242.0/2410.27.242.1 – 10.27.242.25410.27.242.255
11610.27.243.0/2410.27.243.1 – 10.27.243.25410.27.243.255
11710.27.244.0/2410.27.244.1 – 10.27.244.25410.27.244.255
11810.27.245.0/2410.27.245.1 – 10.27.245.25410.27.245.255
11910.27.246.0/2410.27.246.1 – 10.27.246.25410.27.246.255
12010.27.247.0/2410.27.247.1 – 10.27.247.25410.27.247.255
12110.27.248.0/2410.27.248.1 – 10.27.248.25410.27.248.255
12210.27.249.0/2410.27.249.1 – 10.27.249.25410.27.249.255
12310.27.250.0/2410.27.250.1 – 10.27.250.25410.27.250.255
12410.27.251.0/2410.27.251.1 – 10.27.251.25410.27.251.255
12510.27.252.0/2410.27.252.1 – 10.27.252.25410.27.252.255
12610.27.253.0/2410.27.253.1 – 10.27.253.25410.27.253.255
12710.27.254.0/2410.27.254.1 – 10.27.254.25410.27.254.255
12810.27.255.0/2410.27.255.1 – 10.27.255.25410.27.255.255
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 →