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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)10.224.0.0/15
network10.224.0.0/15
broadcast10.225.255.255
first host10.224.0.1
last host10.225.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.224.0.0/15
address00001010.11100000.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.11100000.00000000.00000000
broadcast00001010.11100001.11111111.11111111
green = network part, grey = host part
hex0x0ae00000
decimal182452224
reverse dns0.0.224.10.in-addr.arpa
ipv4-mapped::ffff:ae0:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.224.0.0/2110.224.0.1 – 10.224.7.25410.224.7.255
210.224.8.0/2110.224.8.1 – 10.224.15.25410.224.15.255
310.224.16.0/2110.224.16.1 – 10.224.23.25410.224.23.255
410.224.24.0/2110.224.24.1 – 10.224.31.25410.224.31.255
510.224.32.0/2110.224.32.1 – 10.224.39.25410.224.39.255
610.224.40.0/2110.224.40.1 – 10.224.47.25410.224.47.255
710.224.48.0/2110.224.48.1 – 10.224.55.25410.224.55.255
810.224.56.0/2110.224.56.1 – 10.224.63.25410.224.63.255
910.224.64.0/2110.224.64.1 – 10.224.71.25410.224.71.255
1010.224.72.0/2110.224.72.1 – 10.224.79.25410.224.79.255
1110.224.80.0/2110.224.80.1 – 10.224.87.25410.224.87.255
1210.224.88.0/2110.224.88.1 – 10.224.95.25410.224.95.255
1310.224.96.0/2110.224.96.1 – 10.224.103.25410.224.103.255
1410.224.104.0/2110.224.104.1 – 10.224.111.25410.224.111.255
1510.224.112.0/2110.224.112.1 – 10.224.119.25410.224.119.255
1610.224.120.0/2110.224.120.1 – 10.224.127.25410.224.127.255
1710.224.128.0/2110.224.128.1 – 10.224.135.25410.224.135.255
1810.224.136.0/2110.224.136.1 – 10.224.143.25410.224.143.255
1910.224.144.0/2110.224.144.1 – 10.224.151.25410.224.151.255
2010.224.152.0/2110.224.152.1 – 10.224.159.25410.224.159.255
2110.224.160.0/2110.224.160.1 – 10.224.167.25410.224.167.255
2210.224.168.0/2110.224.168.1 – 10.224.175.25410.224.175.255
2310.224.176.0/2110.224.176.1 – 10.224.183.25410.224.183.255
2410.224.184.0/2110.224.184.1 – 10.224.191.25410.224.191.255
2510.224.192.0/2110.224.192.1 – 10.224.199.25410.224.199.255
2610.224.200.0/2110.224.200.1 – 10.224.207.25410.224.207.255
2710.224.208.0/2110.224.208.1 – 10.224.215.25410.224.215.255
2810.224.216.0/2110.224.216.1 – 10.224.223.25410.224.223.255
2910.224.224.0/2110.224.224.1 – 10.224.231.25410.224.231.255
3010.224.232.0/2110.224.232.1 – 10.224.239.25410.224.239.255
3110.224.240.0/2110.224.240.1 – 10.224.247.25410.224.247.255
3210.224.248.0/2110.224.248.1 – 10.224.255.25410.224.255.255
3310.225.0.0/2110.225.0.1 – 10.225.7.25410.225.7.255
3410.225.8.0/2110.225.8.1 – 10.225.15.25410.225.15.255
3510.225.16.0/2110.225.16.1 – 10.225.23.25410.225.23.255
3610.225.24.0/2110.225.24.1 – 10.225.31.25410.225.31.255
3710.225.32.0/2110.225.32.1 – 10.225.39.25410.225.39.255
3810.225.40.0/2110.225.40.1 – 10.225.47.25410.225.47.255
3910.225.48.0/2110.225.48.1 – 10.225.55.25410.225.55.255
4010.225.56.0/2110.225.56.1 – 10.225.63.25410.225.63.255
4110.225.64.0/2110.225.64.1 – 10.225.71.25410.225.71.255
4210.225.72.0/2110.225.72.1 – 10.225.79.25410.225.79.255
4310.225.80.0/2110.225.80.1 – 10.225.87.25410.225.87.255
4410.225.88.0/2110.225.88.1 – 10.225.95.25410.225.95.255
4510.225.96.0/2110.225.96.1 – 10.225.103.25410.225.103.255
4610.225.104.0/2110.225.104.1 – 10.225.111.25410.225.111.255
4710.225.112.0/2110.225.112.1 – 10.225.119.25410.225.119.255
4810.225.120.0/2110.225.120.1 – 10.225.127.25410.225.127.255
4910.225.128.0/2110.225.128.1 – 10.225.135.25410.225.135.255
5010.225.136.0/2110.225.136.1 – 10.225.143.25410.225.143.255
5110.225.144.0/2110.225.144.1 – 10.225.151.25410.225.151.255
5210.225.152.0/2110.225.152.1 – 10.225.159.25410.225.159.255
5310.225.160.0/2110.225.160.1 – 10.225.167.25410.225.167.255
5410.225.168.0/2110.225.168.1 – 10.225.175.25410.225.175.255
5510.225.176.0/2110.225.176.1 – 10.225.183.25410.225.183.255
5610.225.184.0/2110.225.184.1 – 10.225.191.25410.225.191.255
5710.225.192.0/2110.225.192.1 – 10.225.199.25410.225.199.255
5810.225.200.0/2110.225.200.1 – 10.225.207.25410.225.207.255
5910.225.208.0/2110.225.208.1 – 10.225.215.25410.225.215.255
6010.225.216.0/2110.225.216.1 – 10.225.223.25410.225.223.255
6110.225.224.0/2110.225.224.1 – 10.225.231.25410.225.231.255
6210.225.232.0/2110.225.232.1 – 10.225.239.25410.225.239.255
6310.225.240.0/2110.225.240.1 – 10.225.247.25410.225.247.255
6410.225.248.0/2110.225.248.1 – 10.225.255.25410.225.255.255
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 →