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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)10.136.0.0/13
network10.136.0.0/13
broadcast10.143.255.255
first host10.136.0.1
last host10.143.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.136.0.0/13
address00001010.10001000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.10001000.00000000.00000000
broadcast00001010.10001111.11111111.11111111
green = network part, grey = host part
hex0x0a880000
decimal176685056
reverse dns0.0.136.10.in-addr.arpa
ipv4-mapped::ffff:a88:0

/13 split into /19 · 64 subnets

close ×
#networkhost rangebroadcast
110.136.0.0/1910.136.0.1 – 10.136.31.25410.136.31.255
210.136.32.0/1910.136.32.1 – 10.136.63.25410.136.63.255
310.136.64.0/1910.136.64.1 – 10.136.95.25410.136.95.255
410.136.96.0/1910.136.96.1 – 10.136.127.25410.136.127.255
510.136.128.0/1910.136.128.1 – 10.136.159.25410.136.159.255
610.136.160.0/1910.136.160.1 – 10.136.191.25410.136.191.255
710.136.192.0/1910.136.192.1 – 10.136.223.25410.136.223.255
810.136.224.0/1910.136.224.1 – 10.136.255.25410.136.255.255
910.137.0.0/1910.137.0.1 – 10.137.31.25410.137.31.255
1010.137.32.0/1910.137.32.1 – 10.137.63.25410.137.63.255
1110.137.64.0/1910.137.64.1 – 10.137.95.25410.137.95.255
1210.137.96.0/1910.137.96.1 – 10.137.127.25410.137.127.255
1310.137.128.0/1910.137.128.1 – 10.137.159.25410.137.159.255
1410.137.160.0/1910.137.160.1 – 10.137.191.25410.137.191.255
1510.137.192.0/1910.137.192.1 – 10.137.223.25410.137.223.255
1610.137.224.0/1910.137.224.1 – 10.137.255.25410.137.255.255
1710.138.0.0/1910.138.0.1 – 10.138.31.25410.138.31.255
1810.138.32.0/1910.138.32.1 – 10.138.63.25410.138.63.255
1910.138.64.0/1910.138.64.1 – 10.138.95.25410.138.95.255
2010.138.96.0/1910.138.96.1 – 10.138.127.25410.138.127.255
2110.138.128.0/1910.138.128.1 – 10.138.159.25410.138.159.255
2210.138.160.0/1910.138.160.1 – 10.138.191.25410.138.191.255
2310.138.192.0/1910.138.192.1 – 10.138.223.25410.138.223.255
2410.138.224.0/1910.138.224.1 – 10.138.255.25410.138.255.255
2510.139.0.0/1910.139.0.1 – 10.139.31.25410.139.31.255
2610.139.32.0/1910.139.32.1 – 10.139.63.25410.139.63.255
2710.139.64.0/1910.139.64.1 – 10.139.95.25410.139.95.255
2810.139.96.0/1910.139.96.1 – 10.139.127.25410.139.127.255
2910.139.128.0/1910.139.128.1 – 10.139.159.25410.139.159.255
3010.139.160.0/1910.139.160.1 – 10.139.191.25410.139.191.255
3110.139.192.0/1910.139.192.1 – 10.139.223.25410.139.223.255
3210.139.224.0/1910.139.224.1 – 10.139.255.25410.139.255.255
3310.140.0.0/1910.140.0.1 – 10.140.31.25410.140.31.255
3410.140.32.0/1910.140.32.1 – 10.140.63.25410.140.63.255
3510.140.64.0/1910.140.64.1 – 10.140.95.25410.140.95.255
3610.140.96.0/1910.140.96.1 – 10.140.127.25410.140.127.255
3710.140.128.0/1910.140.128.1 – 10.140.159.25410.140.159.255
3810.140.160.0/1910.140.160.1 – 10.140.191.25410.140.191.255
3910.140.192.0/1910.140.192.1 – 10.140.223.25410.140.223.255
4010.140.224.0/1910.140.224.1 – 10.140.255.25410.140.255.255
4110.141.0.0/1910.141.0.1 – 10.141.31.25410.141.31.255
4210.141.32.0/1910.141.32.1 – 10.141.63.25410.141.63.255
4310.141.64.0/1910.141.64.1 – 10.141.95.25410.141.95.255
4410.141.96.0/1910.141.96.1 – 10.141.127.25410.141.127.255
4510.141.128.0/1910.141.128.1 – 10.141.159.25410.141.159.255
4610.141.160.0/1910.141.160.1 – 10.141.191.25410.141.191.255
4710.141.192.0/1910.141.192.1 – 10.141.223.25410.141.223.255
4810.141.224.0/1910.141.224.1 – 10.141.255.25410.141.255.255
4910.142.0.0/1910.142.0.1 – 10.142.31.25410.142.31.255
5010.142.32.0/1910.142.32.1 – 10.142.63.25410.142.63.255
5110.142.64.0/1910.142.64.1 – 10.142.95.25410.142.95.255
5210.142.96.0/1910.142.96.1 – 10.142.127.25410.142.127.255
5310.142.128.0/1910.142.128.1 – 10.142.159.25410.142.159.255
5410.142.160.0/1910.142.160.1 – 10.142.191.25410.142.191.255
5510.142.192.0/1910.142.192.1 – 10.142.223.25410.142.223.255
5610.142.224.0/1910.142.224.1 – 10.142.255.25410.142.255.255
5710.143.0.0/1910.143.0.1 – 10.143.31.25410.143.31.255
5810.143.32.0/1910.143.32.1 – 10.143.63.25410.143.63.255
5910.143.64.0/1910.143.64.1 – 10.143.95.25410.143.95.255
6010.143.96.0/1910.143.96.1 – 10.143.127.25410.143.127.255
6110.143.128.0/1910.143.128.1 – 10.143.159.25410.143.159.255
6210.143.160.0/1910.143.160.1 – 10.143.191.25410.143.191.255
6310.143.192.0/1910.143.192.1 – 10.143.223.25410.143.223.255
6410.143.224.0/1910.143.224.1 – 10.143.255.25410.143.255.255
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 →