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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)10.0.0.0/13
network10.0.0.0/13
broadcast10.7.255.255
first host10.0.0.1
last host10.7.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.0.0.0/13
address00001010.00000000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00000000.00000000.00000000
broadcast00001010.00000111.11111111.11111111
green = network part, grey = host part
hex0x0a000000
decimal167772160
reverse dns0.0.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:0

/13 split into /19 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.0.0/1910.0.0.1 – 10.0.31.25410.0.31.255
210.0.32.0/1910.0.32.1 – 10.0.63.25410.0.63.255
310.0.64.0/1910.0.64.1 – 10.0.95.25410.0.95.255
410.0.96.0/1910.0.96.1 – 10.0.127.25410.0.127.255
510.0.128.0/1910.0.128.1 – 10.0.159.25410.0.159.255
610.0.160.0/1910.0.160.1 – 10.0.191.25410.0.191.255
710.0.192.0/1910.0.192.1 – 10.0.223.25410.0.223.255
810.0.224.0/1910.0.224.1 – 10.0.255.25410.0.255.255
910.1.0.0/1910.1.0.1 – 10.1.31.25410.1.31.255
1010.1.32.0/1910.1.32.1 – 10.1.63.25410.1.63.255
1110.1.64.0/1910.1.64.1 – 10.1.95.25410.1.95.255
1210.1.96.0/1910.1.96.1 – 10.1.127.25410.1.127.255
1310.1.128.0/1910.1.128.1 – 10.1.159.25410.1.159.255
1410.1.160.0/1910.1.160.1 – 10.1.191.25410.1.191.255
1510.1.192.0/1910.1.192.1 – 10.1.223.25410.1.223.255
1610.1.224.0/1910.1.224.1 – 10.1.255.25410.1.255.255
1710.2.0.0/1910.2.0.1 – 10.2.31.25410.2.31.255
1810.2.32.0/1910.2.32.1 – 10.2.63.25410.2.63.255
1910.2.64.0/1910.2.64.1 – 10.2.95.25410.2.95.255
2010.2.96.0/1910.2.96.1 – 10.2.127.25410.2.127.255
2110.2.128.0/1910.2.128.1 – 10.2.159.25410.2.159.255
2210.2.160.0/1910.2.160.1 – 10.2.191.25410.2.191.255
2310.2.192.0/1910.2.192.1 – 10.2.223.25410.2.223.255
2410.2.224.0/1910.2.224.1 – 10.2.255.25410.2.255.255
2510.3.0.0/1910.3.0.1 – 10.3.31.25410.3.31.255
2610.3.32.0/1910.3.32.1 – 10.3.63.25410.3.63.255
2710.3.64.0/1910.3.64.1 – 10.3.95.25410.3.95.255
2810.3.96.0/1910.3.96.1 – 10.3.127.25410.3.127.255
2910.3.128.0/1910.3.128.1 – 10.3.159.25410.3.159.255
3010.3.160.0/1910.3.160.1 – 10.3.191.25410.3.191.255
3110.3.192.0/1910.3.192.1 – 10.3.223.25410.3.223.255
3210.3.224.0/1910.3.224.1 – 10.3.255.25410.3.255.255
3310.4.0.0/1910.4.0.1 – 10.4.31.25410.4.31.255
3410.4.32.0/1910.4.32.1 – 10.4.63.25410.4.63.255
3510.4.64.0/1910.4.64.1 – 10.4.95.25410.4.95.255
3610.4.96.0/1910.4.96.1 – 10.4.127.25410.4.127.255
3710.4.128.0/1910.4.128.1 – 10.4.159.25410.4.159.255
3810.4.160.0/1910.4.160.1 – 10.4.191.25410.4.191.255
3910.4.192.0/1910.4.192.1 – 10.4.223.25410.4.223.255
4010.4.224.0/1910.4.224.1 – 10.4.255.25410.4.255.255
4110.5.0.0/1910.5.0.1 – 10.5.31.25410.5.31.255
4210.5.32.0/1910.5.32.1 – 10.5.63.25410.5.63.255
4310.5.64.0/1910.5.64.1 – 10.5.95.25410.5.95.255
4410.5.96.0/1910.5.96.1 – 10.5.127.25410.5.127.255
4510.5.128.0/1910.5.128.1 – 10.5.159.25410.5.159.255
4610.5.160.0/1910.5.160.1 – 10.5.191.25410.5.191.255
4710.5.192.0/1910.5.192.1 – 10.5.223.25410.5.223.255
4810.5.224.0/1910.5.224.1 – 10.5.255.25410.5.255.255
4910.6.0.0/1910.6.0.1 – 10.6.31.25410.6.31.255
5010.6.32.0/1910.6.32.1 – 10.6.63.25410.6.63.255
5110.6.64.0/1910.6.64.1 – 10.6.95.25410.6.95.255
5210.6.96.0/1910.6.96.1 – 10.6.127.25410.6.127.255
5310.6.128.0/1910.6.128.1 – 10.6.159.25410.6.159.255
5410.6.160.0/1910.6.160.1 – 10.6.191.25410.6.191.255
5510.6.192.0/1910.6.192.1 – 10.6.223.25410.6.223.255
5610.6.224.0/1910.6.224.1 – 10.6.255.25410.6.255.255
5710.7.0.0/1910.7.0.1 – 10.7.31.25410.7.31.255
5810.7.32.0/1910.7.32.1 – 10.7.63.25410.7.63.255
5910.7.64.0/1910.7.64.1 – 10.7.95.25410.7.95.255
6010.7.96.0/1910.7.96.1 – 10.7.127.25410.7.127.255
6110.7.128.0/1910.7.128.1 – 10.7.159.25410.7.159.255
6210.7.160.0/1910.7.160.1 – 10.7.191.25410.7.191.255
6310.7.192.0/1910.7.192.1 – 10.7.223.25410.7.223.255
6410.7.224.0/1910.7.224.1 – 10.7.255.25410.7.255.255
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 →