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
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.78.96.0/20
network10.78.96.0/20
broadcast10.78.111.255
first host10.78.96.1
last host10.78.111.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.78.96.0/20
address00001010.01001110.01100000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.01001110.01100000.00000000
broadcast00001010.01001110.01101111.11111111
green = network part, grey = host part
hex0x0a4e6000
decimal172908544
reverse dns0.96.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:6000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.96.0/2710.78.96.1 – 10.78.96.3010.78.96.31
210.78.96.32/2710.78.96.33 – 10.78.96.6210.78.96.63
310.78.96.64/2710.78.96.65 – 10.78.96.9410.78.96.95
410.78.96.96/2710.78.96.97 – 10.78.96.12610.78.96.127
510.78.96.128/2710.78.96.129 – 10.78.96.15810.78.96.159
610.78.96.160/2710.78.96.161 – 10.78.96.19010.78.96.191
710.78.96.192/2710.78.96.193 – 10.78.96.22210.78.96.223
810.78.96.224/2710.78.96.225 – 10.78.96.25410.78.96.255
910.78.97.0/2710.78.97.1 – 10.78.97.3010.78.97.31
1010.78.97.32/2710.78.97.33 – 10.78.97.6210.78.97.63
1110.78.97.64/2710.78.97.65 – 10.78.97.9410.78.97.95
1210.78.97.96/2710.78.97.97 – 10.78.97.12610.78.97.127
1310.78.97.128/2710.78.97.129 – 10.78.97.15810.78.97.159
1410.78.97.160/2710.78.97.161 – 10.78.97.19010.78.97.191
1510.78.97.192/2710.78.97.193 – 10.78.97.22210.78.97.223
1610.78.97.224/2710.78.97.225 – 10.78.97.25410.78.97.255
1710.78.98.0/2710.78.98.1 – 10.78.98.3010.78.98.31
1810.78.98.32/2710.78.98.33 – 10.78.98.6210.78.98.63
1910.78.98.64/2710.78.98.65 – 10.78.98.9410.78.98.95
2010.78.98.96/2710.78.98.97 – 10.78.98.12610.78.98.127
2110.78.98.128/2710.78.98.129 – 10.78.98.15810.78.98.159
2210.78.98.160/2710.78.98.161 – 10.78.98.19010.78.98.191
2310.78.98.192/2710.78.98.193 – 10.78.98.22210.78.98.223
2410.78.98.224/2710.78.98.225 – 10.78.98.25410.78.98.255
2510.78.99.0/2710.78.99.1 – 10.78.99.3010.78.99.31
2610.78.99.32/2710.78.99.33 – 10.78.99.6210.78.99.63
2710.78.99.64/2710.78.99.65 – 10.78.99.9410.78.99.95
2810.78.99.96/2710.78.99.97 – 10.78.99.12610.78.99.127
2910.78.99.128/2710.78.99.129 – 10.78.99.15810.78.99.159
3010.78.99.160/2710.78.99.161 – 10.78.99.19010.78.99.191
3110.78.99.192/2710.78.99.193 – 10.78.99.22210.78.99.223
3210.78.99.224/2710.78.99.225 – 10.78.99.25410.78.99.255
3310.78.100.0/2710.78.100.1 – 10.78.100.3010.78.100.31
3410.78.100.32/2710.78.100.33 – 10.78.100.6210.78.100.63
3510.78.100.64/2710.78.100.65 – 10.78.100.9410.78.100.95
3610.78.100.96/2710.78.100.97 – 10.78.100.12610.78.100.127
3710.78.100.128/2710.78.100.129 – 10.78.100.15810.78.100.159
3810.78.100.160/2710.78.100.161 – 10.78.100.19010.78.100.191
3910.78.100.192/2710.78.100.193 – 10.78.100.22210.78.100.223
4010.78.100.224/2710.78.100.225 – 10.78.100.25410.78.100.255
4110.78.101.0/2710.78.101.1 – 10.78.101.3010.78.101.31
4210.78.101.32/2710.78.101.33 – 10.78.101.6210.78.101.63
4310.78.101.64/2710.78.101.65 – 10.78.101.9410.78.101.95
4410.78.101.96/2710.78.101.97 – 10.78.101.12610.78.101.127
4510.78.101.128/2710.78.101.129 – 10.78.101.15810.78.101.159
4610.78.101.160/2710.78.101.161 – 10.78.101.19010.78.101.191
4710.78.101.192/2710.78.101.193 – 10.78.101.22210.78.101.223
4810.78.101.224/2710.78.101.225 – 10.78.101.25410.78.101.255
4910.78.102.0/2710.78.102.1 – 10.78.102.3010.78.102.31
5010.78.102.32/2710.78.102.33 – 10.78.102.6210.78.102.63
5110.78.102.64/2710.78.102.65 – 10.78.102.9410.78.102.95
5210.78.102.96/2710.78.102.97 – 10.78.102.12610.78.102.127
5310.78.102.128/2710.78.102.129 – 10.78.102.15810.78.102.159
5410.78.102.160/2710.78.102.161 – 10.78.102.19010.78.102.191
5510.78.102.192/2710.78.102.193 – 10.78.102.22210.78.102.223
5610.78.102.224/2710.78.102.225 – 10.78.102.25410.78.102.255
5710.78.103.0/2710.78.103.1 – 10.78.103.3010.78.103.31
5810.78.103.32/2710.78.103.33 – 10.78.103.6210.78.103.63
5910.78.103.64/2710.78.103.65 – 10.78.103.9410.78.103.95
6010.78.103.96/2710.78.103.97 – 10.78.103.12610.78.103.127
6110.78.103.128/2710.78.103.129 – 10.78.103.15810.78.103.159
6210.78.103.160/2710.78.103.161 – 10.78.103.19010.78.103.191
6310.78.103.192/2710.78.103.193 – 10.78.103.22210.78.103.223
6410.78.103.224/2710.78.103.225 – 10.78.103.25410.78.103.255
6510.78.104.0/2710.78.104.1 – 10.78.104.3010.78.104.31
6610.78.104.32/2710.78.104.33 – 10.78.104.6210.78.104.63
6710.78.104.64/2710.78.104.65 – 10.78.104.9410.78.104.95
6810.78.104.96/2710.78.104.97 – 10.78.104.12610.78.104.127
6910.78.104.128/2710.78.104.129 – 10.78.104.15810.78.104.159
7010.78.104.160/2710.78.104.161 – 10.78.104.19010.78.104.191
7110.78.104.192/2710.78.104.193 – 10.78.104.22210.78.104.223
7210.78.104.224/2710.78.104.225 – 10.78.104.25410.78.104.255
7310.78.105.0/2710.78.105.1 – 10.78.105.3010.78.105.31
7410.78.105.32/2710.78.105.33 – 10.78.105.6210.78.105.63
7510.78.105.64/2710.78.105.65 – 10.78.105.9410.78.105.95
7610.78.105.96/2710.78.105.97 – 10.78.105.12610.78.105.127
7710.78.105.128/2710.78.105.129 – 10.78.105.15810.78.105.159
7810.78.105.160/2710.78.105.161 – 10.78.105.19010.78.105.191
7910.78.105.192/2710.78.105.193 – 10.78.105.22210.78.105.223
8010.78.105.224/2710.78.105.225 – 10.78.105.25410.78.105.255
8110.78.106.0/2710.78.106.1 – 10.78.106.3010.78.106.31
8210.78.106.32/2710.78.106.33 – 10.78.106.6210.78.106.63
8310.78.106.64/2710.78.106.65 – 10.78.106.9410.78.106.95
8410.78.106.96/2710.78.106.97 – 10.78.106.12610.78.106.127
8510.78.106.128/2710.78.106.129 – 10.78.106.15810.78.106.159
8610.78.106.160/2710.78.106.161 – 10.78.106.19010.78.106.191
8710.78.106.192/2710.78.106.193 – 10.78.106.22210.78.106.223
8810.78.106.224/2710.78.106.225 – 10.78.106.25410.78.106.255
8910.78.107.0/2710.78.107.1 – 10.78.107.3010.78.107.31
9010.78.107.32/2710.78.107.33 – 10.78.107.6210.78.107.63
9110.78.107.64/2710.78.107.65 – 10.78.107.9410.78.107.95
9210.78.107.96/2710.78.107.97 – 10.78.107.12610.78.107.127
9310.78.107.128/2710.78.107.129 – 10.78.107.15810.78.107.159
9410.78.107.160/2710.78.107.161 – 10.78.107.19010.78.107.191
9510.78.107.192/2710.78.107.193 – 10.78.107.22210.78.107.223
9610.78.107.224/2710.78.107.225 – 10.78.107.25410.78.107.255
9710.78.108.0/2710.78.108.1 – 10.78.108.3010.78.108.31
9810.78.108.32/2710.78.108.33 – 10.78.108.6210.78.108.63
9910.78.108.64/2710.78.108.65 – 10.78.108.9410.78.108.95
10010.78.108.96/2710.78.108.97 – 10.78.108.12610.78.108.127
10110.78.108.128/2710.78.108.129 – 10.78.108.15810.78.108.159
10210.78.108.160/2710.78.108.161 – 10.78.108.19010.78.108.191
10310.78.108.192/2710.78.108.193 – 10.78.108.22210.78.108.223
10410.78.108.224/2710.78.108.225 – 10.78.108.25410.78.108.255
10510.78.109.0/2710.78.109.1 – 10.78.109.3010.78.109.31
10610.78.109.32/2710.78.109.33 – 10.78.109.6210.78.109.63
10710.78.109.64/2710.78.109.65 – 10.78.109.9410.78.109.95
10810.78.109.96/2710.78.109.97 – 10.78.109.12610.78.109.127
10910.78.109.128/2710.78.109.129 – 10.78.109.15810.78.109.159
11010.78.109.160/2710.78.109.161 – 10.78.109.19010.78.109.191
11110.78.109.192/2710.78.109.193 – 10.78.109.22210.78.109.223
11210.78.109.224/2710.78.109.225 – 10.78.109.25410.78.109.255
11310.78.110.0/2710.78.110.1 – 10.78.110.3010.78.110.31
11410.78.110.32/2710.78.110.33 – 10.78.110.6210.78.110.63
11510.78.110.64/2710.78.110.65 – 10.78.110.9410.78.110.95
11610.78.110.96/2710.78.110.97 – 10.78.110.12610.78.110.127
11710.78.110.128/2710.78.110.129 – 10.78.110.15810.78.110.159
11810.78.110.160/2710.78.110.161 – 10.78.110.19010.78.110.191
11910.78.110.192/2710.78.110.193 – 10.78.110.22210.78.110.223
12010.78.110.224/2710.78.110.225 – 10.78.110.25410.78.110.255
12110.78.111.0/2710.78.111.1 – 10.78.111.3010.78.111.31
12210.78.111.32/2710.78.111.33 – 10.78.111.6210.78.111.63
12310.78.111.64/2710.78.111.65 – 10.78.111.9410.78.111.95
12410.78.111.96/2710.78.111.97 – 10.78.111.12610.78.111.127
12510.78.111.128/2710.78.111.129 – 10.78.111.15810.78.111.159
12610.78.111.160/2710.78.111.161 – 10.78.111.19010.78.111.191
12710.78.111.192/2710.78.111.193 – 10.78.111.22210.78.111.223
12810.78.111.224/2710.78.111.225 – 10.78.111.25410.78.111.255
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 →