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)10.12.0.0/15
network10.12.0.0/15
broadcast10.13.255.255
first host10.12.0.1
last host10.13.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.12.0.0/15
address00001010.00001100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.00001100.00000000.00000000
broadcast00001010.00001101.11111111.11111111
green = network part, grey = host part
hex0x0a0c0000
decimal168558592
reverse dns0.0.12.10.in-addr.arpa
ipv4-mapped::ffff:a0c:0

/15 split into /22 · 128 subnets

close ×
#networkhost rangebroadcast
110.12.0.0/2210.12.0.1 – 10.12.3.25410.12.3.255
210.12.4.0/2210.12.4.1 – 10.12.7.25410.12.7.255
310.12.8.0/2210.12.8.1 – 10.12.11.25410.12.11.255
410.12.12.0/2210.12.12.1 – 10.12.15.25410.12.15.255
510.12.16.0/2210.12.16.1 – 10.12.19.25410.12.19.255
610.12.20.0/2210.12.20.1 – 10.12.23.25410.12.23.255
710.12.24.0/2210.12.24.1 – 10.12.27.25410.12.27.255
810.12.28.0/2210.12.28.1 – 10.12.31.25410.12.31.255
910.12.32.0/2210.12.32.1 – 10.12.35.25410.12.35.255
1010.12.36.0/2210.12.36.1 – 10.12.39.25410.12.39.255
1110.12.40.0/2210.12.40.1 – 10.12.43.25410.12.43.255
1210.12.44.0/2210.12.44.1 – 10.12.47.25410.12.47.255
1310.12.48.0/2210.12.48.1 – 10.12.51.25410.12.51.255
1410.12.52.0/2210.12.52.1 – 10.12.55.25410.12.55.255
1510.12.56.0/2210.12.56.1 – 10.12.59.25410.12.59.255
1610.12.60.0/2210.12.60.1 – 10.12.63.25410.12.63.255
1710.12.64.0/2210.12.64.1 – 10.12.67.25410.12.67.255
1810.12.68.0/2210.12.68.1 – 10.12.71.25410.12.71.255
1910.12.72.0/2210.12.72.1 – 10.12.75.25410.12.75.255
2010.12.76.0/2210.12.76.1 – 10.12.79.25410.12.79.255
2110.12.80.0/2210.12.80.1 – 10.12.83.25410.12.83.255
2210.12.84.0/2210.12.84.1 – 10.12.87.25410.12.87.255
2310.12.88.0/2210.12.88.1 – 10.12.91.25410.12.91.255
2410.12.92.0/2210.12.92.1 – 10.12.95.25410.12.95.255
2510.12.96.0/2210.12.96.1 – 10.12.99.25410.12.99.255
2610.12.100.0/2210.12.100.1 – 10.12.103.25410.12.103.255
2710.12.104.0/2210.12.104.1 – 10.12.107.25410.12.107.255
2810.12.108.0/2210.12.108.1 – 10.12.111.25410.12.111.255
2910.12.112.0/2210.12.112.1 – 10.12.115.25410.12.115.255
3010.12.116.0/2210.12.116.1 – 10.12.119.25410.12.119.255
3110.12.120.0/2210.12.120.1 – 10.12.123.25410.12.123.255
3210.12.124.0/2210.12.124.1 – 10.12.127.25410.12.127.255
3310.12.128.0/2210.12.128.1 – 10.12.131.25410.12.131.255
3410.12.132.0/2210.12.132.1 – 10.12.135.25410.12.135.255
3510.12.136.0/2210.12.136.1 – 10.12.139.25410.12.139.255
3610.12.140.0/2210.12.140.1 – 10.12.143.25410.12.143.255
3710.12.144.0/2210.12.144.1 – 10.12.147.25410.12.147.255
3810.12.148.0/2210.12.148.1 – 10.12.151.25410.12.151.255
3910.12.152.0/2210.12.152.1 – 10.12.155.25410.12.155.255
4010.12.156.0/2210.12.156.1 – 10.12.159.25410.12.159.255
4110.12.160.0/2210.12.160.1 – 10.12.163.25410.12.163.255
4210.12.164.0/2210.12.164.1 – 10.12.167.25410.12.167.255
4310.12.168.0/2210.12.168.1 – 10.12.171.25410.12.171.255
4410.12.172.0/2210.12.172.1 – 10.12.175.25410.12.175.255
4510.12.176.0/2210.12.176.1 – 10.12.179.25410.12.179.255
4610.12.180.0/2210.12.180.1 – 10.12.183.25410.12.183.255
4710.12.184.0/2210.12.184.1 – 10.12.187.25410.12.187.255
4810.12.188.0/2210.12.188.1 – 10.12.191.25410.12.191.255
4910.12.192.0/2210.12.192.1 – 10.12.195.25410.12.195.255
5010.12.196.0/2210.12.196.1 – 10.12.199.25410.12.199.255
5110.12.200.0/2210.12.200.1 – 10.12.203.25410.12.203.255
5210.12.204.0/2210.12.204.1 – 10.12.207.25410.12.207.255
5310.12.208.0/2210.12.208.1 – 10.12.211.25410.12.211.255
5410.12.212.0/2210.12.212.1 – 10.12.215.25410.12.215.255
5510.12.216.0/2210.12.216.1 – 10.12.219.25410.12.219.255
5610.12.220.0/2210.12.220.1 – 10.12.223.25410.12.223.255
5710.12.224.0/2210.12.224.1 – 10.12.227.25410.12.227.255
5810.12.228.0/2210.12.228.1 – 10.12.231.25410.12.231.255
5910.12.232.0/2210.12.232.1 – 10.12.235.25410.12.235.255
6010.12.236.0/2210.12.236.1 – 10.12.239.25410.12.239.255
6110.12.240.0/2210.12.240.1 – 10.12.243.25410.12.243.255
6210.12.244.0/2210.12.244.1 – 10.12.247.25410.12.247.255
6310.12.248.0/2210.12.248.1 – 10.12.251.25410.12.251.255
6410.12.252.0/2210.12.252.1 – 10.12.255.25410.12.255.255
6510.13.0.0/2210.13.0.1 – 10.13.3.25410.13.3.255
6610.13.4.0/2210.13.4.1 – 10.13.7.25410.13.7.255
6710.13.8.0/2210.13.8.1 – 10.13.11.25410.13.11.255
6810.13.12.0/2210.13.12.1 – 10.13.15.25410.13.15.255
6910.13.16.0/2210.13.16.1 – 10.13.19.25410.13.19.255
7010.13.20.0/2210.13.20.1 – 10.13.23.25410.13.23.255
7110.13.24.0/2210.13.24.1 – 10.13.27.25410.13.27.255
7210.13.28.0/2210.13.28.1 – 10.13.31.25410.13.31.255
7310.13.32.0/2210.13.32.1 – 10.13.35.25410.13.35.255
7410.13.36.0/2210.13.36.1 – 10.13.39.25410.13.39.255
7510.13.40.0/2210.13.40.1 – 10.13.43.25410.13.43.255
7610.13.44.0/2210.13.44.1 – 10.13.47.25410.13.47.255
7710.13.48.0/2210.13.48.1 – 10.13.51.25410.13.51.255
7810.13.52.0/2210.13.52.1 – 10.13.55.25410.13.55.255
7910.13.56.0/2210.13.56.1 – 10.13.59.25410.13.59.255
8010.13.60.0/2210.13.60.1 – 10.13.63.25410.13.63.255
8110.13.64.0/2210.13.64.1 – 10.13.67.25410.13.67.255
8210.13.68.0/2210.13.68.1 – 10.13.71.25410.13.71.255
8310.13.72.0/2210.13.72.1 – 10.13.75.25410.13.75.255
8410.13.76.0/2210.13.76.1 – 10.13.79.25410.13.79.255
8510.13.80.0/2210.13.80.1 – 10.13.83.25410.13.83.255
8610.13.84.0/2210.13.84.1 – 10.13.87.25410.13.87.255
8710.13.88.0/2210.13.88.1 – 10.13.91.25410.13.91.255
8810.13.92.0/2210.13.92.1 – 10.13.95.25410.13.95.255
8910.13.96.0/2210.13.96.1 – 10.13.99.25410.13.99.255
9010.13.100.0/2210.13.100.1 – 10.13.103.25410.13.103.255
9110.13.104.0/2210.13.104.1 – 10.13.107.25410.13.107.255
9210.13.108.0/2210.13.108.1 – 10.13.111.25410.13.111.255
9310.13.112.0/2210.13.112.1 – 10.13.115.25410.13.115.255
9410.13.116.0/2210.13.116.1 – 10.13.119.25410.13.119.255
9510.13.120.0/2210.13.120.1 – 10.13.123.25410.13.123.255
9610.13.124.0/2210.13.124.1 – 10.13.127.25410.13.127.255
9710.13.128.0/2210.13.128.1 – 10.13.131.25410.13.131.255
9810.13.132.0/2210.13.132.1 – 10.13.135.25410.13.135.255
9910.13.136.0/2210.13.136.1 – 10.13.139.25410.13.139.255
10010.13.140.0/2210.13.140.1 – 10.13.143.25410.13.143.255
10110.13.144.0/2210.13.144.1 – 10.13.147.25410.13.147.255
10210.13.148.0/2210.13.148.1 – 10.13.151.25410.13.151.255
10310.13.152.0/2210.13.152.1 – 10.13.155.25410.13.155.255
10410.13.156.0/2210.13.156.1 – 10.13.159.25410.13.159.255
10510.13.160.0/2210.13.160.1 – 10.13.163.25410.13.163.255
10610.13.164.0/2210.13.164.1 – 10.13.167.25410.13.167.255
10710.13.168.0/2210.13.168.1 – 10.13.171.25410.13.171.255
10810.13.172.0/2210.13.172.1 – 10.13.175.25410.13.175.255
10910.13.176.0/2210.13.176.1 – 10.13.179.25410.13.179.255
11010.13.180.0/2210.13.180.1 – 10.13.183.25410.13.183.255
11110.13.184.0/2210.13.184.1 – 10.13.187.25410.13.187.255
11210.13.188.0/2210.13.188.1 – 10.13.191.25410.13.191.255
11310.13.192.0/2210.13.192.1 – 10.13.195.25410.13.195.255
11410.13.196.0/2210.13.196.1 – 10.13.199.25410.13.199.255
11510.13.200.0/2210.13.200.1 – 10.13.203.25410.13.203.255
11610.13.204.0/2210.13.204.1 – 10.13.207.25410.13.207.255
11710.13.208.0/2210.13.208.1 – 10.13.211.25410.13.211.255
11810.13.212.0/2210.13.212.1 – 10.13.215.25410.13.215.255
11910.13.216.0/2210.13.216.1 – 10.13.219.25410.13.219.255
12010.13.220.0/2210.13.220.1 – 10.13.223.25410.13.223.255
12110.13.224.0/2210.13.224.1 – 10.13.227.25410.13.227.255
12210.13.228.0/2210.13.228.1 – 10.13.231.25410.13.231.255
12310.13.232.0/2210.13.232.1 – 10.13.235.25410.13.235.255
12410.13.236.0/2210.13.236.1 – 10.13.239.25410.13.239.255
12510.13.240.0/2210.13.240.1 – 10.13.243.25410.13.243.255
12610.13.244.0/2210.13.244.1 – 10.13.247.25410.13.247.255
12710.13.248.0/2210.13.248.1 – 10.13.251.25410.13.251.255
12810.13.252.0/2210.13.252.1 – 10.13.255.25410.13.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /15
/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-
/15255.254.0.0131,072131,0701
/16255.255.0.065,53665,5342 split →
/17255.255.128.032,76832,7664 split →
/18255.255.192.016,38416,3828 split →
/19255.255.224.08,1928,19016 split →
/20255.255.240.04,0964,09432 split →
/21255.255.248.02,0482,04664 split →
/22255.255.252.01,0241,022128 split →
/23255.255.254.0512510256 split →
/24255.255.255.0256254512 split →
/25255.255.255.1281281261,024 split →
/26255.255.255.19264622,048 split →
/27255.255.255.22432304,096 split →
/28255.255.255.24016148,192 split →
/29255.255.255.2488616,384 split →
/30255.255.255.2524232,768 split →
/31255.255.255.2542265,536 split →
/32255.255.255.25511131,072 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 →