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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)10.232.0.0/13
network10.232.0.0/13
broadcast10.239.255.255
first host10.232.0.1
last host10.239.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.232.0.0/13
address00001010.11101000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.11101000.00000000.00000000
broadcast00001010.11101111.11111111.11111111
green = network part, grey = host part
hex0x0ae80000
decimal182976512
reverse dns0.0.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:0

/13 split into /19 · 64 subnets

close ×
#networkhost rangebroadcast
110.232.0.0/1910.232.0.1 – 10.232.31.25410.232.31.255
210.232.32.0/1910.232.32.1 – 10.232.63.25410.232.63.255
310.232.64.0/1910.232.64.1 – 10.232.95.25410.232.95.255
410.232.96.0/1910.232.96.1 – 10.232.127.25410.232.127.255
510.232.128.0/1910.232.128.1 – 10.232.159.25410.232.159.255
610.232.160.0/1910.232.160.1 – 10.232.191.25410.232.191.255
710.232.192.0/1910.232.192.1 – 10.232.223.25410.232.223.255
810.232.224.0/1910.232.224.1 – 10.232.255.25410.232.255.255
910.233.0.0/1910.233.0.1 – 10.233.31.25410.233.31.255
1010.233.32.0/1910.233.32.1 – 10.233.63.25410.233.63.255
1110.233.64.0/1910.233.64.1 – 10.233.95.25410.233.95.255
1210.233.96.0/1910.233.96.1 – 10.233.127.25410.233.127.255
1310.233.128.0/1910.233.128.1 – 10.233.159.25410.233.159.255
1410.233.160.0/1910.233.160.1 – 10.233.191.25410.233.191.255
1510.233.192.0/1910.233.192.1 – 10.233.223.25410.233.223.255
1610.233.224.0/1910.233.224.1 – 10.233.255.25410.233.255.255
1710.234.0.0/1910.234.0.1 – 10.234.31.25410.234.31.255
1810.234.32.0/1910.234.32.1 – 10.234.63.25410.234.63.255
1910.234.64.0/1910.234.64.1 – 10.234.95.25410.234.95.255
2010.234.96.0/1910.234.96.1 – 10.234.127.25410.234.127.255
2110.234.128.0/1910.234.128.1 – 10.234.159.25410.234.159.255
2210.234.160.0/1910.234.160.1 – 10.234.191.25410.234.191.255
2310.234.192.0/1910.234.192.1 – 10.234.223.25410.234.223.255
2410.234.224.0/1910.234.224.1 – 10.234.255.25410.234.255.255
2510.235.0.0/1910.235.0.1 – 10.235.31.25410.235.31.255
2610.235.32.0/1910.235.32.1 – 10.235.63.25410.235.63.255
2710.235.64.0/1910.235.64.1 – 10.235.95.25410.235.95.255
2810.235.96.0/1910.235.96.1 – 10.235.127.25410.235.127.255
2910.235.128.0/1910.235.128.1 – 10.235.159.25410.235.159.255
3010.235.160.0/1910.235.160.1 – 10.235.191.25410.235.191.255
3110.235.192.0/1910.235.192.1 – 10.235.223.25410.235.223.255
3210.235.224.0/1910.235.224.1 – 10.235.255.25410.235.255.255
3310.236.0.0/1910.236.0.1 – 10.236.31.25410.236.31.255
3410.236.32.0/1910.236.32.1 – 10.236.63.25410.236.63.255
3510.236.64.0/1910.236.64.1 – 10.236.95.25410.236.95.255
3610.236.96.0/1910.236.96.1 – 10.236.127.25410.236.127.255
3710.236.128.0/1910.236.128.1 – 10.236.159.25410.236.159.255
3810.236.160.0/1910.236.160.1 – 10.236.191.25410.236.191.255
3910.236.192.0/1910.236.192.1 – 10.236.223.25410.236.223.255
4010.236.224.0/1910.236.224.1 – 10.236.255.25410.236.255.255
4110.237.0.0/1910.237.0.1 – 10.237.31.25410.237.31.255
4210.237.32.0/1910.237.32.1 – 10.237.63.25410.237.63.255
4310.237.64.0/1910.237.64.1 – 10.237.95.25410.237.95.255
4410.237.96.0/1910.237.96.1 – 10.237.127.25410.237.127.255
4510.237.128.0/1910.237.128.1 – 10.237.159.25410.237.159.255
4610.237.160.0/1910.237.160.1 – 10.237.191.25410.237.191.255
4710.237.192.0/1910.237.192.1 – 10.237.223.25410.237.223.255
4810.237.224.0/1910.237.224.1 – 10.237.255.25410.237.255.255
4910.238.0.0/1910.238.0.1 – 10.238.31.25410.238.31.255
5010.238.32.0/1910.238.32.1 – 10.238.63.25410.238.63.255
5110.238.64.0/1910.238.64.1 – 10.238.95.25410.238.95.255
5210.238.96.0/1910.238.96.1 – 10.238.127.25410.238.127.255
5310.238.128.0/1910.238.128.1 – 10.238.159.25410.238.159.255
5410.238.160.0/1910.238.160.1 – 10.238.191.25410.238.191.255
5510.238.192.0/1910.238.192.1 – 10.238.223.25410.238.223.255
5610.238.224.0/1910.238.224.1 – 10.238.255.25410.238.255.255
5710.239.0.0/1910.239.0.1 – 10.239.31.25410.239.31.255
5810.239.32.0/1910.239.32.1 – 10.239.63.25410.239.63.255
5910.239.64.0/1910.239.64.1 – 10.239.95.25410.239.95.255
6010.239.96.0/1910.239.96.1 – 10.239.127.25410.239.127.255
6110.239.128.0/1910.239.128.1 – 10.239.159.25410.239.159.255
6210.239.160.0/1910.239.160.1 – 10.239.191.25410.239.191.255
6310.239.192.0/1910.239.192.1 – 10.239.223.25410.239.223.255
6410.239.224.0/1910.239.224.1 – 10.239.255.25410.239.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /13
/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-
/13255.248.0.0524,288524,2861
/14255.252.0.0262,144262,1422 split →
/15255.254.0.0131,072131,0704 split →
/16255.255.0.065,53665,5348 split →
/17255.255.128.032,76832,76616 split →
/18255.255.192.016,38416,38232 split →
/19255.255.224.08,1928,19064 split →
/20255.255.240.04,0964,094128 split →
/21255.255.248.02,0482,046256 split →
/22255.255.252.01,0241,022512 split →
/23255.255.254.05125101,024 split →
/24255.255.255.02562542,048 split →
/25255.255.255.1281281264,096 split →
/26255.255.255.19264628,192 split →
/27255.255.255.224323016,384 split →
/28255.255.255.240161432,768 split →
/29255.255.255.2488665,536 split →
/30255.255.255.25242131,072 split →
/31255.255.255.25422262,144 split →
/32255.255.255.25511524,288 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 →