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)10.228.0.0/15
network10.228.0.0/15
broadcast10.229.255.255
first host10.228.0.1
last host10.229.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.228.0.0/15
address00001010.11100100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.11100100.00000000.00000000
broadcast00001010.11100101.11111111.11111111
green = network part, grey = host part
hex0x0ae40000
decimal182714368
reverse dns0.0.228.10.in-addr.arpa
ipv4-mapped::ffff:ae4:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.228.0.0/2110.228.0.1 – 10.228.7.25410.228.7.255
210.228.8.0/2110.228.8.1 – 10.228.15.25410.228.15.255
310.228.16.0/2110.228.16.1 – 10.228.23.25410.228.23.255
410.228.24.0/2110.228.24.1 – 10.228.31.25410.228.31.255
510.228.32.0/2110.228.32.1 – 10.228.39.25410.228.39.255
610.228.40.0/2110.228.40.1 – 10.228.47.25410.228.47.255
710.228.48.0/2110.228.48.1 – 10.228.55.25410.228.55.255
810.228.56.0/2110.228.56.1 – 10.228.63.25410.228.63.255
910.228.64.0/2110.228.64.1 – 10.228.71.25410.228.71.255
1010.228.72.0/2110.228.72.1 – 10.228.79.25410.228.79.255
1110.228.80.0/2110.228.80.1 – 10.228.87.25410.228.87.255
1210.228.88.0/2110.228.88.1 – 10.228.95.25410.228.95.255
1310.228.96.0/2110.228.96.1 – 10.228.103.25410.228.103.255
1410.228.104.0/2110.228.104.1 – 10.228.111.25410.228.111.255
1510.228.112.0/2110.228.112.1 – 10.228.119.25410.228.119.255
1610.228.120.0/2110.228.120.1 – 10.228.127.25410.228.127.255
1710.228.128.0/2110.228.128.1 – 10.228.135.25410.228.135.255
1810.228.136.0/2110.228.136.1 – 10.228.143.25410.228.143.255
1910.228.144.0/2110.228.144.1 – 10.228.151.25410.228.151.255
2010.228.152.0/2110.228.152.1 – 10.228.159.25410.228.159.255
2110.228.160.0/2110.228.160.1 – 10.228.167.25410.228.167.255
2210.228.168.0/2110.228.168.1 – 10.228.175.25410.228.175.255
2310.228.176.0/2110.228.176.1 – 10.228.183.25410.228.183.255
2410.228.184.0/2110.228.184.1 – 10.228.191.25410.228.191.255
2510.228.192.0/2110.228.192.1 – 10.228.199.25410.228.199.255
2610.228.200.0/2110.228.200.1 – 10.228.207.25410.228.207.255
2710.228.208.0/2110.228.208.1 – 10.228.215.25410.228.215.255
2810.228.216.0/2110.228.216.1 – 10.228.223.25410.228.223.255
2910.228.224.0/2110.228.224.1 – 10.228.231.25410.228.231.255
3010.228.232.0/2110.228.232.1 – 10.228.239.25410.228.239.255
3110.228.240.0/2110.228.240.1 – 10.228.247.25410.228.247.255
3210.228.248.0/2110.228.248.1 – 10.228.255.25410.228.255.255
3310.229.0.0/2110.229.0.1 – 10.229.7.25410.229.7.255
3410.229.8.0/2110.229.8.1 – 10.229.15.25410.229.15.255
3510.229.16.0/2110.229.16.1 – 10.229.23.25410.229.23.255
3610.229.24.0/2110.229.24.1 – 10.229.31.25410.229.31.255
3710.229.32.0/2110.229.32.1 – 10.229.39.25410.229.39.255
3810.229.40.0/2110.229.40.1 – 10.229.47.25410.229.47.255
3910.229.48.0/2110.229.48.1 – 10.229.55.25410.229.55.255
4010.229.56.0/2110.229.56.1 – 10.229.63.25410.229.63.255
4110.229.64.0/2110.229.64.1 – 10.229.71.25410.229.71.255
4210.229.72.0/2110.229.72.1 – 10.229.79.25410.229.79.255
4310.229.80.0/2110.229.80.1 – 10.229.87.25410.229.87.255
4410.229.88.0/2110.229.88.1 – 10.229.95.25410.229.95.255
4510.229.96.0/2110.229.96.1 – 10.229.103.25410.229.103.255
4610.229.104.0/2110.229.104.1 – 10.229.111.25410.229.111.255
4710.229.112.0/2110.229.112.1 – 10.229.119.25410.229.119.255
4810.229.120.0/2110.229.120.1 – 10.229.127.25410.229.127.255
4910.229.128.0/2110.229.128.1 – 10.229.135.25410.229.135.255
5010.229.136.0/2110.229.136.1 – 10.229.143.25410.229.143.255
5110.229.144.0/2110.229.144.1 – 10.229.151.25410.229.151.255
5210.229.152.0/2110.229.152.1 – 10.229.159.25410.229.159.255
5310.229.160.0/2110.229.160.1 – 10.229.167.25410.229.167.255
5410.229.168.0/2110.229.168.1 – 10.229.175.25410.229.175.255
5510.229.176.0/2110.229.176.1 – 10.229.183.25410.229.183.255
5610.229.184.0/2110.229.184.1 – 10.229.191.25410.229.191.255
5710.229.192.0/2110.229.192.1 – 10.229.199.25410.229.199.255
5810.229.200.0/2110.229.200.1 – 10.229.207.25410.229.207.255
5910.229.208.0/2110.229.208.1 – 10.229.215.25410.229.215.255
6010.229.216.0/2110.229.216.1 – 10.229.223.25410.229.223.255
6110.229.224.0/2110.229.224.1 – 10.229.231.25410.229.231.255
6210.229.232.0/2110.229.232.1 – 10.229.239.25410.229.239.255
6310.229.240.0/2110.229.240.1 – 10.229.247.25410.229.247.255
6410.229.248.0/2110.229.248.1 – 10.229.255.25410.229.255.255
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 →