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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)10.226.0.0/15
network10.226.0.0/15
broadcast10.227.255.255
first host10.226.0.1
last host10.227.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.226.0.0/15
address00001010.11100010.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.11100010.00000000.00000000
broadcast00001010.11100011.11111111.11111111
green = network part, grey = host part
hex0x0ae20000
decimal182583296
reverse dns0.0.226.10.in-addr.arpa
ipv4-mapped::ffff:ae2:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.226.0.0/2110.226.0.1 – 10.226.7.25410.226.7.255
210.226.8.0/2110.226.8.1 – 10.226.15.25410.226.15.255
310.226.16.0/2110.226.16.1 – 10.226.23.25410.226.23.255
410.226.24.0/2110.226.24.1 – 10.226.31.25410.226.31.255
510.226.32.0/2110.226.32.1 – 10.226.39.25410.226.39.255
610.226.40.0/2110.226.40.1 – 10.226.47.25410.226.47.255
710.226.48.0/2110.226.48.1 – 10.226.55.25410.226.55.255
810.226.56.0/2110.226.56.1 – 10.226.63.25410.226.63.255
910.226.64.0/2110.226.64.1 – 10.226.71.25410.226.71.255
1010.226.72.0/2110.226.72.1 – 10.226.79.25410.226.79.255
1110.226.80.0/2110.226.80.1 – 10.226.87.25410.226.87.255
1210.226.88.0/2110.226.88.1 – 10.226.95.25410.226.95.255
1310.226.96.0/2110.226.96.1 – 10.226.103.25410.226.103.255
1410.226.104.0/2110.226.104.1 – 10.226.111.25410.226.111.255
1510.226.112.0/2110.226.112.1 – 10.226.119.25410.226.119.255
1610.226.120.0/2110.226.120.1 – 10.226.127.25410.226.127.255
1710.226.128.0/2110.226.128.1 – 10.226.135.25410.226.135.255
1810.226.136.0/2110.226.136.1 – 10.226.143.25410.226.143.255
1910.226.144.0/2110.226.144.1 – 10.226.151.25410.226.151.255
2010.226.152.0/2110.226.152.1 – 10.226.159.25410.226.159.255
2110.226.160.0/2110.226.160.1 – 10.226.167.25410.226.167.255
2210.226.168.0/2110.226.168.1 – 10.226.175.25410.226.175.255
2310.226.176.0/2110.226.176.1 – 10.226.183.25410.226.183.255
2410.226.184.0/2110.226.184.1 – 10.226.191.25410.226.191.255
2510.226.192.0/2110.226.192.1 – 10.226.199.25410.226.199.255
2610.226.200.0/2110.226.200.1 – 10.226.207.25410.226.207.255
2710.226.208.0/2110.226.208.1 – 10.226.215.25410.226.215.255
2810.226.216.0/2110.226.216.1 – 10.226.223.25410.226.223.255
2910.226.224.0/2110.226.224.1 – 10.226.231.25410.226.231.255
3010.226.232.0/2110.226.232.1 – 10.226.239.25410.226.239.255
3110.226.240.0/2110.226.240.1 – 10.226.247.25410.226.247.255
3210.226.248.0/2110.226.248.1 – 10.226.255.25410.226.255.255
3310.227.0.0/2110.227.0.1 – 10.227.7.25410.227.7.255
3410.227.8.0/2110.227.8.1 – 10.227.15.25410.227.15.255
3510.227.16.0/2110.227.16.1 – 10.227.23.25410.227.23.255
3610.227.24.0/2110.227.24.1 – 10.227.31.25410.227.31.255
3710.227.32.0/2110.227.32.1 – 10.227.39.25410.227.39.255
3810.227.40.0/2110.227.40.1 – 10.227.47.25410.227.47.255
3910.227.48.0/2110.227.48.1 – 10.227.55.25410.227.55.255
4010.227.56.0/2110.227.56.1 – 10.227.63.25410.227.63.255
4110.227.64.0/2110.227.64.1 – 10.227.71.25410.227.71.255
4210.227.72.0/2110.227.72.1 – 10.227.79.25410.227.79.255
4310.227.80.0/2110.227.80.1 – 10.227.87.25410.227.87.255
4410.227.88.0/2110.227.88.1 – 10.227.95.25410.227.95.255
4510.227.96.0/2110.227.96.1 – 10.227.103.25410.227.103.255
4610.227.104.0/2110.227.104.1 – 10.227.111.25410.227.111.255
4710.227.112.0/2110.227.112.1 – 10.227.119.25410.227.119.255
4810.227.120.0/2110.227.120.1 – 10.227.127.25410.227.127.255
4910.227.128.0/2110.227.128.1 – 10.227.135.25410.227.135.255
5010.227.136.0/2110.227.136.1 – 10.227.143.25410.227.143.255
5110.227.144.0/2110.227.144.1 – 10.227.151.25410.227.151.255
5210.227.152.0/2110.227.152.1 – 10.227.159.25410.227.159.255
5310.227.160.0/2110.227.160.1 – 10.227.167.25410.227.167.255
5410.227.168.0/2110.227.168.1 – 10.227.175.25410.227.175.255
5510.227.176.0/2110.227.176.1 – 10.227.183.25410.227.183.255
5610.227.184.0/2110.227.184.1 – 10.227.191.25410.227.191.255
5710.227.192.0/2110.227.192.1 – 10.227.199.25410.227.199.255
5810.227.200.0/2110.227.200.1 – 10.227.207.25410.227.207.255
5910.227.208.0/2110.227.208.1 – 10.227.215.25410.227.215.255
6010.227.216.0/2110.227.216.1 – 10.227.223.25410.227.223.255
6110.227.224.0/2110.227.224.1 – 10.227.231.25410.227.231.255
6210.227.232.0/2110.227.232.1 – 10.227.239.25410.227.239.255
6310.227.240.0/2110.227.240.1 – 10.227.247.25410.227.247.255
6410.227.248.0/2110.227.248.1 – 10.227.255.25410.227.255.255
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 →