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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)10.64.0.0/13
network10.64.0.0/13
broadcast10.71.255.255
first host10.64.0.1
last host10.71.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.64.0.0/13
address00001010.01000000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.01000000.00000000.00000000
broadcast00001010.01000111.11111111.11111111
green = network part, grey = host part
hex0x0a400000
decimal171966464
reverse dns0.0.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:0

/13 split into /19 · 64 subnets

close ×
#networkhost rangebroadcast
110.64.0.0/1910.64.0.1 – 10.64.31.25410.64.31.255
210.64.32.0/1910.64.32.1 – 10.64.63.25410.64.63.255
310.64.64.0/1910.64.64.1 – 10.64.95.25410.64.95.255
410.64.96.0/1910.64.96.1 – 10.64.127.25410.64.127.255
510.64.128.0/1910.64.128.1 – 10.64.159.25410.64.159.255
610.64.160.0/1910.64.160.1 – 10.64.191.25410.64.191.255
710.64.192.0/1910.64.192.1 – 10.64.223.25410.64.223.255
810.64.224.0/1910.64.224.1 – 10.64.255.25410.64.255.255
910.65.0.0/1910.65.0.1 – 10.65.31.25410.65.31.255
1010.65.32.0/1910.65.32.1 – 10.65.63.25410.65.63.255
1110.65.64.0/1910.65.64.1 – 10.65.95.25410.65.95.255
1210.65.96.0/1910.65.96.1 – 10.65.127.25410.65.127.255
1310.65.128.0/1910.65.128.1 – 10.65.159.25410.65.159.255
1410.65.160.0/1910.65.160.1 – 10.65.191.25410.65.191.255
1510.65.192.0/1910.65.192.1 – 10.65.223.25410.65.223.255
1610.65.224.0/1910.65.224.1 – 10.65.255.25410.65.255.255
1710.66.0.0/1910.66.0.1 – 10.66.31.25410.66.31.255
1810.66.32.0/1910.66.32.1 – 10.66.63.25410.66.63.255
1910.66.64.0/1910.66.64.1 – 10.66.95.25410.66.95.255
2010.66.96.0/1910.66.96.1 – 10.66.127.25410.66.127.255
2110.66.128.0/1910.66.128.1 – 10.66.159.25410.66.159.255
2210.66.160.0/1910.66.160.1 – 10.66.191.25410.66.191.255
2310.66.192.0/1910.66.192.1 – 10.66.223.25410.66.223.255
2410.66.224.0/1910.66.224.1 – 10.66.255.25410.66.255.255
2510.67.0.0/1910.67.0.1 – 10.67.31.25410.67.31.255
2610.67.32.0/1910.67.32.1 – 10.67.63.25410.67.63.255
2710.67.64.0/1910.67.64.1 – 10.67.95.25410.67.95.255
2810.67.96.0/1910.67.96.1 – 10.67.127.25410.67.127.255
2910.67.128.0/1910.67.128.1 – 10.67.159.25410.67.159.255
3010.67.160.0/1910.67.160.1 – 10.67.191.25410.67.191.255
3110.67.192.0/1910.67.192.1 – 10.67.223.25410.67.223.255
3210.67.224.0/1910.67.224.1 – 10.67.255.25410.67.255.255
3310.68.0.0/1910.68.0.1 – 10.68.31.25410.68.31.255
3410.68.32.0/1910.68.32.1 – 10.68.63.25410.68.63.255
3510.68.64.0/1910.68.64.1 – 10.68.95.25410.68.95.255
3610.68.96.0/1910.68.96.1 – 10.68.127.25410.68.127.255
3710.68.128.0/1910.68.128.1 – 10.68.159.25410.68.159.255
3810.68.160.0/1910.68.160.1 – 10.68.191.25410.68.191.255
3910.68.192.0/1910.68.192.1 – 10.68.223.25410.68.223.255
4010.68.224.0/1910.68.224.1 – 10.68.255.25410.68.255.255
4110.69.0.0/1910.69.0.1 – 10.69.31.25410.69.31.255
4210.69.32.0/1910.69.32.1 – 10.69.63.25410.69.63.255
4310.69.64.0/1910.69.64.1 – 10.69.95.25410.69.95.255
4410.69.96.0/1910.69.96.1 – 10.69.127.25410.69.127.255
4510.69.128.0/1910.69.128.1 – 10.69.159.25410.69.159.255
4610.69.160.0/1910.69.160.1 – 10.69.191.25410.69.191.255
4710.69.192.0/1910.69.192.1 – 10.69.223.25410.69.223.255
4810.69.224.0/1910.69.224.1 – 10.69.255.25410.69.255.255
4910.70.0.0/1910.70.0.1 – 10.70.31.25410.70.31.255
5010.70.32.0/1910.70.32.1 – 10.70.63.25410.70.63.255
5110.70.64.0/1910.70.64.1 – 10.70.95.25410.70.95.255
5210.70.96.0/1910.70.96.1 – 10.70.127.25410.70.127.255
5310.70.128.0/1910.70.128.1 – 10.70.159.25410.70.159.255
5410.70.160.0/1910.70.160.1 – 10.70.191.25410.70.191.255
5510.70.192.0/1910.70.192.1 – 10.70.223.25410.70.223.255
5610.70.224.0/1910.70.224.1 – 10.70.255.25410.70.255.255
5710.71.0.0/1910.71.0.1 – 10.71.31.25410.71.31.255
5810.71.32.0/1910.71.32.1 – 10.71.63.25410.71.63.255
5910.71.64.0/1910.71.64.1 – 10.71.95.25410.71.95.255
6010.71.96.0/1910.71.96.1 – 10.71.127.25410.71.127.255
6110.71.128.0/1910.71.128.1 – 10.71.159.25410.71.159.255
6210.71.160.0/1910.71.160.1 – 10.71.191.25410.71.191.255
6310.71.192.0/1910.71.192.1 – 10.71.223.25410.71.223.255
6410.71.224.0/1910.71.224.1 – 10.71.255.25410.71.255.255
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 →