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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 /17 · 16 subnets

close ×
#networkhost rangebroadcast
110.232.0.0/1710.232.0.1 – 10.232.127.25410.232.127.255
210.232.128.0/1710.232.128.1 – 10.232.255.25410.232.255.255
310.233.0.0/1710.233.0.1 – 10.233.127.25410.233.127.255
410.233.128.0/1710.233.128.1 – 10.233.255.25410.233.255.255
510.234.0.0/1710.234.0.1 – 10.234.127.25410.234.127.255
610.234.128.0/1710.234.128.1 – 10.234.255.25410.234.255.255
710.235.0.0/1710.235.0.1 – 10.235.127.25410.235.127.255
810.235.128.0/1710.235.128.1 – 10.235.255.25410.235.255.255
910.236.0.0/1710.236.0.1 – 10.236.127.25410.236.127.255
1010.236.128.0/1710.236.128.1 – 10.236.255.25410.236.255.255
1110.237.0.0/1710.237.0.1 – 10.237.127.25410.237.127.255
1210.237.128.0/1710.237.128.1 – 10.237.255.25410.237.255.255
1310.238.0.0/1710.238.0.1 – 10.238.127.25410.238.127.255
1410.238.128.0/1710.238.128.1 – 10.238.255.25410.238.255.255
1510.239.0.0/1710.239.0.1 – 10.239.127.25410.239.127.255
1610.239.128.0/1710.239.128.1 – 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 →