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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)10.56.0.0/13
network10.56.0.0/13
broadcast10.63.255.255
first host10.56.0.1
last host10.63.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.56.0.0/13
address00001010.00111000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00111000.00000000.00000000
broadcast00001010.00111111.11111111.11111111
green = network part, grey = host part
hex0x0a380000
decimal171442176
reverse dns0.0.56.10.in-addr.arpa
ipv4-mapped::ffff:a38:0

/13 split into /19 · 64 subnets

close ×
#networkhost rangebroadcast
110.56.0.0/1910.56.0.1 – 10.56.31.25410.56.31.255
210.56.32.0/1910.56.32.1 – 10.56.63.25410.56.63.255
310.56.64.0/1910.56.64.1 – 10.56.95.25410.56.95.255
410.56.96.0/1910.56.96.1 – 10.56.127.25410.56.127.255
510.56.128.0/1910.56.128.1 – 10.56.159.25410.56.159.255
610.56.160.0/1910.56.160.1 – 10.56.191.25410.56.191.255
710.56.192.0/1910.56.192.1 – 10.56.223.25410.56.223.255
810.56.224.0/1910.56.224.1 – 10.56.255.25410.56.255.255
910.57.0.0/1910.57.0.1 – 10.57.31.25410.57.31.255
1010.57.32.0/1910.57.32.1 – 10.57.63.25410.57.63.255
1110.57.64.0/1910.57.64.1 – 10.57.95.25410.57.95.255
1210.57.96.0/1910.57.96.1 – 10.57.127.25410.57.127.255
1310.57.128.0/1910.57.128.1 – 10.57.159.25410.57.159.255
1410.57.160.0/1910.57.160.1 – 10.57.191.25410.57.191.255
1510.57.192.0/1910.57.192.1 – 10.57.223.25410.57.223.255
1610.57.224.0/1910.57.224.1 – 10.57.255.25410.57.255.255
1710.58.0.0/1910.58.0.1 – 10.58.31.25410.58.31.255
1810.58.32.0/1910.58.32.1 – 10.58.63.25410.58.63.255
1910.58.64.0/1910.58.64.1 – 10.58.95.25410.58.95.255
2010.58.96.0/1910.58.96.1 – 10.58.127.25410.58.127.255
2110.58.128.0/1910.58.128.1 – 10.58.159.25410.58.159.255
2210.58.160.0/1910.58.160.1 – 10.58.191.25410.58.191.255
2310.58.192.0/1910.58.192.1 – 10.58.223.25410.58.223.255
2410.58.224.0/1910.58.224.1 – 10.58.255.25410.58.255.255
2510.59.0.0/1910.59.0.1 – 10.59.31.25410.59.31.255
2610.59.32.0/1910.59.32.1 – 10.59.63.25410.59.63.255
2710.59.64.0/1910.59.64.1 – 10.59.95.25410.59.95.255
2810.59.96.0/1910.59.96.1 – 10.59.127.25410.59.127.255
2910.59.128.0/1910.59.128.1 – 10.59.159.25410.59.159.255
3010.59.160.0/1910.59.160.1 – 10.59.191.25410.59.191.255
3110.59.192.0/1910.59.192.1 – 10.59.223.25410.59.223.255
3210.59.224.0/1910.59.224.1 – 10.59.255.25410.59.255.255
3310.60.0.0/1910.60.0.1 – 10.60.31.25410.60.31.255
3410.60.32.0/1910.60.32.1 – 10.60.63.25410.60.63.255
3510.60.64.0/1910.60.64.1 – 10.60.95.25410.60.95.255
3610.60.96.0/1910.60.96.1 – 10.60.127.25410.60.127.255
3710.60.128.0/1910.60.128.1 – 10.60.159.25410.60.159.255
3810.60.160.0/1910.60.160.1 – 10.60.191.25410.60.191.255
3910.60.192.0/1910.60.192.1 – 10.60.223.25410.60.223.255
4010.60.224.0/1910.60.224.1 – 10.60.255.25410.60.255.255
4110.61.0.0/1910.61.0.1 – 10.61.31.25410.61.31.255
4210.61.32.0/1910.61.32.1 – 10.61.63.25410.61.63.255
4310.61.64.0/1910.61.64.1 – 10.61.95.25410.61.95.255
4410.61.96.0/1910.61.96.1 – 10.61.127.25410.61.127.255
4510.61.128.0/1910.61.128.1 – 10.61.159.25410.61.159.255
4610.61.160.0/1910.61.160.1 – 10.61.191.25410.61.191.255
4710.61.192.0/1910.61.192.1 – 10.61.223.25410.61.223.255
4810.61.224.0/1910.61.224.1 – 10.61.255.25410.61.255.255
4910.62.0.0/1910.62.0.1 – 10.62.31.25410.62.31.255
5010.62.32.0/1910.62.32.1 – 10.62.63.25410.62.63.255
5110.62.64.0/1910.62.64.1 – 10.62.95.25410.62.95.255
5210.62.96.0/1910.62.96.1 – 10.62.127.25410.62.127.255
5310.62.128.0/1910.62.128.1 – 10.62.159.25410.62.159.255
5410.62.160.0/1910.62.160.1 – 10.62.191.25410.62.191.255
5510.62.192.0/1910.62.192.1 – 10.62.223.25410.62.223.255
5610.62.224.0/1910.62.224.1 – 10.62.255.25410.62.255.255
5710.63.0.0/1910.63.0.1 – 10.63.31.25410.63.31.255
5810.63.32.0/1910.63.32.1 – 10.63.63.25410.63.63.255
5910.63.64.0/1910.63.64.1 – 10.63.95.25410.63.95.255
6010.63.96.0/1910.63.96.1 – 10.63.127.25410.63.127.255
6110.63.128.0/1910.63.128.1 – 10.63.159.25410.63.159.255
6210.63.160.0/1910.63.160.1 – 10.63.191.25410.63.191.255
6310.63.192.0/1910.63.192.1 – 10.63.223.25410.63.223.255
6410.63.224.0/1910.63.224.1 – 10.63.255.25410.63.255.255
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 →