ip
ipku.in

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
private IP (RFC 1918)10.13.224.0/20
network10.13.224.0/20
broadcast10.13.239.255
first host10.13.224.1
last host10.13.239.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.13.224.0/20
address00001010.00001101.11100000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001101.11100000.00000000
broadcast00001010.00001101.11101111.11111111
green = network part, grey = host part
hex0x0a0de000
decimal168681472
reverse dns0.224.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:e000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.13.224.0/2710.13.224.1 – 10.13.224.3010.13.224.31
210.13.224.32/2710.13.224.33 – 10.13.224.6210.13.224.63
310.13.224.64/2710.13.224.65 – 10.13.224.9410.13.224.95
410.13.224.96/2710.13.224.97 – 10.13.224.12610.13.224.127
510.13.224.128/2710.13.224.129 – 10.13.224.15810.13.224.159
610.13.224.160/2710.13.224.161 – 10.13.224.19010.13.224.191
710.13.224.192/2710.13.224.193 – 10.13.224.22210.13.224.223
810.13.224.224/2710.13.224.225 – 10.13.224.25410.13.224.255
910.13.225.0/2710.13.225.1 – 10.13.225.3010.13.225.31
1010.13.225.32/2710.13.225.33 – 10.13.225.6210.13.225.63
1110.13.225.64/2710.13.225.65 – 10.13.225.9410.13.225.95
1210.13.225.96/2710.13.225.97 – 10.13.225.12610.13.225.127
1310.13.225.128/2710.13.225.129 – 10.13.225.15810.13.225.159
1410.13.225.160/2710.13.225.161 – 10.13.225.19010.13.225.191
1510.13.225.192/2710.13.225.193 – 10.13.225.22210.13.225.223
1610.13.225.224/2710.13.225.225 – 10.13.225.25410.13.225.255
1710.13.226.0/2710.13.226.1 – 10.13.226.3010.13.226.31
1810.13.226.32/2710.13.226.33 – 10.13.226.6210.13.226.63
1910.13.226.64/2710.13.226.65 – 10.13.226.9410.13.226.95
2010.13.226.96/2710.13.226.97 – 10.13.226.12610.13.226.127
2110.13.226.128/2710.13.226.129 – 10.13.226.15810.13.226.159
2210.13.226.160/2710.13.226.161 – 10.13.226.19010.13.226.191
2310.13.226.192/2710.13.226.193 – 10.13.226.22210.13.226.223
2410.13.226.224/2710.13.226.225 – 10.13.226.25410.13.226.255
2510.13.227.0/2710.13.227.1 – 10.13.227.3010.13.227.31
2610.13.227.32/2710.13.227.33 – 10.13.227.6210.13.227.63
2710.13.227.64/2710.13.227.65 – 10.13.227.9410.13.227.95
2810.13.227.96/2710.13.227.97 – 10.13.227.12610.13.227.127
2910.13.227.128/2710.13.227.129 – 10.13.227.15810.13.227.159
3010.13.227.160/2710.13.227.161 – 10.13.227.19010.13.227.191
3110.13.227.192/2710.13.227.193 – 10.13.227.22210.13.227.223
3210.13.227.224/2710.13.227.225 – 10.13.227.25410.13.227.255
3310.13.228.0/2710.13.228.1 – 10.13.228.3010.13.228.31
3410.13.228.32/2710.13.228.33 – 10.13.228.6210.13.228.63
3510.13.228.64/2710.13.228.65 – 10.13.228.9410.13.228.95
3610.13.228.96/2710.13.228.97 – 10.13.228.12610.13.228.127
3710.13.228.128/2710.13.228.129 – 10.13.228.15810.13.228.159
3810.13.228.160/2710.13.228.161 – 10.13.228.19010.13.228.191
3910.13.228.192/2710.13.228.193 – 10.13.228.22210.13.228.223
4010.13.228.224/2710.13.228.225 – 10.13.228.25410.13.228.255
4110.13.229.0/2710.13.229.1 – 10.13.229.3010.13.229.31
4210.13.229.32/2710.13.229.33 – 10.13.229.6210.13.229.63
4310.13.229.64/2710.13.229.65 – 10.13.229.9410.13.229.95
4410.13.229.96/2710.13.229.97 – 10.13.229.12610.13.229.127
4510.13.229.128/2710.13.229.129 – 10.13.229.15810.13.229.159
4610.13.229.160/2710.13.229.161 – 10.13.229.19010.13.229.191
4710.13.229.192/2710.13.229.193 – 10.13.229.22210.13.229.223
4810.13.229.224/2710.13.229.225 – 10.13.229.25410.13.229.255
4910.13.230.0/2710.13.230.1 – 10.13.230.3010.13.230.31
5010.13.230.32/2710.13.230.33 – 10.13.230.6210.13.230.63
5110.13.230.64/2710.13.230.65 – 10.13.230.9410.13.230.95
5210.13.230.96/2710.13.230.97 – 10.13.230.12610.13.230.127
5310.13.230.128/2710.13.230.129 – 10.13.230.15810.13.230.159
5410.13.230.160/2710.13.230.161 – 10.13.230.19010.13.230.191
5510.13.230.192/2710.13.230.193 – 10.13.230.22210.13.230.223
5610.13.230.224/2710.13.230.225 – 10.13.230.25410.13.230.255
5710.13.231.0/2710.13.231.1 – 10.13.231.3010.13.231.31
5810.13.231.32/2710.13.231.33 – 10.13.231.6210.13.231.63
5910.13.231.64/2710.13.231.65 – 10.13.231.9410.13.231.95
6010.13.231.96/2710.13.231.97 – 10.13.231.12610.13.231.127
6110.13.231.128/2710.13.231.129 – 10.13.231.15810.13.231.159
6210.13.231.160/2710.13.231.161 – 10.13.231.19010.13.231.191
6310.13.231.192/2710.13.231.193 – 10.13.231.22210.13.231.223
6410.13.231.224/2710.13.231.225 – 10.13.231.25410.13.231.255
6510.13.232.0/2710.13.232.1 – 10.13.232.3010.13.232.31
6610.13.232.32/2710.13.232.33 – 10.13.232.6210.13.232.63
6710.13.232.64/2710.13.232.65 – 10.13.232.9410.13.232.95
6810.13.232.96/2710.13.232.97 – 10.13.232.12610.13.232.127
6910.13.232.128/2710.13.232.129 – 10.13.232.15810.13.232.159
7010.13.232.160/2710.13.232.161 – 10.13.232.19010.13.232.191
7110.13.232.192/2710.13.232.193 – 10.13.232.22210.13.232.223
7210.13.232.224/2710.13.232.225 – 10.13.232.25410.13.232.255
7310.13.233.0/2710.13.233.1 – 10.13.233.3010.13.233.31
7410.13.233.32/2710.13.233.33 – 10.13.233.6210.13.233.63
7510.13.233.64/2710.13.233.65 – 10.13.233.9410.13.233.95
7610.13.233.96/2710.13.233.97 – 10.13.233.12610.13.233.127
7710.13.233.128/2710.13.233.129 – 10.13.233.15810.13.233.159
7810.13.233.160/2710.13.233.161 – 10.13.233.19010.13.233.191
7910.13.233.192/2710.13.233.193 – 10.13.233.22210.13.233.223
8010.13.233.224/2710.13.233.225 – 10.13.233.25410.13.233.255
8110.13.234.0/2710.13.234.1 – 10.13.234.3010.13.234.31
8210.13.234.32/2710.13.234.33 – 10.13.234.6210.13.234.63
8310.13.234.64/2710.13.234.65 – 10.13.234.9410.13.234.95
8410.13.234.96/2710.13.234.97 – 10.13.234.12610.13.234.127
8510.13.234.128/2710.13.234.129 – 10.13.234.15810.13.234.159
8610.13.234.160/2710.13.234.161 – 10.13.234.19010.13.234.191
8710.13.234.192/2710.13.234.193 – 10.13.234.22210.13.234.223
8810.13.234.224/2710.13.234.225 – 10.13.234.25410.13.234.255
8910.13.235.0/2710.13.235.1 – 10.13.235.3010.13.235.31
9010.13.235.32/2710.13.235.33 – 10.13.235.6210.13.235.63
9110.13.235.64/2710.13.235.65 – 10.13.235.9410.13.235.95
9210.13.235.96/2710.13.235.97 – 10.13.235.12610.13.235.127
9310.13.235.128/2710.13.235.129 – 10.13.235.15810.13.235.159
9410.13.235.160/2710.13.235.161 – 10.13.235.19010.13.235.191
9510.13.235.192/2710.13.235.193 – 10.13.235.22210.13.235.223
9610.13.235.224/2710.13.235.225 – 10.13.235.25410.13.235.255
9710.13.236.0/2710.13.236.1 – 10.13.236.3010.13.236.31
9810.13.236.32/2710.13.236.33 – 10.13.236.6210.13.236.63
9910.13.236.64/2710.13.236.65 – 10.13.236.9410.13.236.95
10010.13.236.96/2710.13.236.97 – 10.13.236.12610.13.236.127
10110.13.236.128/2710.13.236.129 – 10.13.236.15810.13.236.159
10210.13.236.160/2710.13.236.161 – 10.13.236.19010.13.236.191
10310.13.236.192/2710.13.236.193 – 10.13.236.22210.13.236.223
10410.13.236.224/2710.13.236.225 – 10.13.236.25410.13.236.255
10510.13.237.0/2710.13.237.1 – 10.13.237.3010.13.237.31
10610.13.237.32/2710.13.237.33 – 10.13.237.6210.13.237.63
10710.13.237.64/2710.13.237.65 – 10.13.237.9410.13.237.95
10810.13.237.96/2710.13.237.97 – 10.13.237.12610.13.237.127
10910.13.237.128/2710.13.237.129 – 10.13.237.15810.13.237.159
11010.13.237.160/2710.13.237.161 – 10.13.237.19010.13.237.191
11110.13.237.192/2710.13.237.193 – 10.13.237.22210.13.237.223
11210.13.237.224/2710.13.237.225 – 10.13.237.25410.13.237.255
11310.13.238.0/2710.13.238.1 – 10.13.238.3010.13.238.31
11410.13.238.32/2710.13.238.33 – 10.13.238.6210.13.238.63
11510.13.238.64/2710.13.238.65 – 10.13.238.9410.13.238.95
11610.13.238.96/2710.13.238.97 – 10.13.238.12610.13.238.127
11710.13.238.128/2710.13.238.129 – 10.13.238.15810.13.238.159
11810.13.238.160/2710.13.238.161 – 10.13.238.19010.13.238.191
11910.13.238.192/2710.13.238.193 – 10.13.238.22210.13.238.223
12010.13.238.224/2710.13.238.225 – 10.13.238.25410.13.238.255
12110.13.239.0/2710.13.239.1 – 10.13.239.3010.13.239.31
12210.13.239.32/2710.13.239.33 – 10.13.239.6210.13.239.63
12310.13.239.64/2710.13.239.65 – 10.13.239.9410.13.239.95
12410.13.239.96/2710.13.239.97 – 10.13.239.12610.13.239.127
12510.13.239.128/2710.13.239.129 – 10.13.239.15810.13.239.159
12610.13.239.160/2710.13.239.161 – 10.13.239.19010.13.239.191
12710.13.239.192/2710.13.239.193 – 10.13.239.22210.13.239.223
12810.13.239.224/2710.13.239.225 – 10.13.239.25410.13.239.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /20
/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-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,0941
/21255.255.248.02,0482,0462 split →
/22255.255.252.01,0241,0224 split →
/23255.255.254.05125108 split →
/24255.255.255.025625416 split →
/25255.255.255.12812812632 split →
/26255.255.255.192646264 split →
/27255.255.255.2243230128 split →
/28255.255.255.2401614256 split →
/29255.255.255.24886512 split →
/30255.255.255.252421,024 split →
/31255.255.255.254222,048 split →
/32255.255.255.255114,096 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 →