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)10.78.48.0/20
network10.78.48.0/20
broadcast10.78.63.255
first host10.78.48.1
last host10.78.63.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.78.48.0/20
address00001010.01001110.00110000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.01001110.00110000.00000000
broadcast00001010.01001110.00111111.11111111
green = network part, grey = host part
hex0x0a4e3000
decimal172896256
reverse dns0.48.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:3000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.48.0/2710.78.48.1 – 10.78.48.3010.78.48.31
210.78.48.32/2710.78.48.33 – 10.78.48.6210.78.48.63
310.78.48.64/2710.78.48.65 – 10.78.48.9410.78.48.95
410.78.48.96/2710.78.48.97 – 10.78.48.12610.78.48.127
510.78.48.128/2710.78.48.129 – 10.78.48.15810.78.48.159
610.78.48.160/2710.78.48.161 – 10.78.48.19010.78.48.191
710.78.48.192/2710.78.48.193 – 10.78.48.22210.78.48.223
810.78.48.224/2710.78.48.225 – 10.78.48.25410.78.48.255
910.78.49.0/2710.78.49.1 – 10.78.49.3010.78.49.31
1010.78.49.32/2710.78.49.33 – 10.78.49.6210.78.49.63
1110.78.49.64/2710.78.49.65 – 10.78.49.9410.78.49.95
1210.78.49.96/2710.78.49.97 – 10.78.49.12610.78.49.127
1310.78.49.128/2710.78.49.129 – 10.78.49.15810.78.49.159
1410.78.49.160/2710.78.49.161 – 10.78.49.19010.78.49.191
1510.78.49.192/2710.78.49.193 – 10.78.49.22210.78.49.223
1610.78.49.224/2710.78.49.225 – 10.78.49.25410.78.49.255
1710.78.50.0/2710.78.50.1 – 10.78.50.3010.78.50.31
1810.78.50.32/2710.78.50.33 – 10.78.50.6210.78.50.63
1910.78.50.64/2710.78.50.65 – 10.78.50.9410.78.50.95
2010.78.50.96/2710.78.50.97 – 10.78.50.12610.78.50.127
2110.78.50.128/2710.78.50.129 – 10.78.50.15810.78.50.159
2210.78.50.160/2710.78.50.161 – 10.78.50.19010.78.50.191
2310.78.50.192/2710.78.50.193 – 10.78.50.22210.78.50.223
2410.78.50.224/2710.78.50.225 – 10.78.50.25410.78.50.255
2510.78.51.0/2710.78.51.1 – 10.78.51.3010.78.51.31
2610.78.51.32/2710.78.51.33 – 10.78.51.6210.78.51.63
2710.78.51.64/2710.78.51.65 – 10.78.51.9410.78.51.95
2810.78.51.96/2710.78.51.97 – 10.78.51.12610.78.51.127
2910.78.51.128/2710.78.51.129 – 10.78.51.15810.78.51.159
3010.78.51.160/2710.78.51.161 – 10.78.51.19010.78.51.191
3110.78.51.192/2710.78.51.193 – 10.78.51.22210.78.51.223
3210.78.51.224/2710.78.51.225 – 10.78.51.25410.78.51.255
3310.78.52.0/2710.78.52.1 – 10.78.52.3010.78.52.31
3410.78.52.32/2710.78.52.33 – 10.78.52.6210.78.52.63
3510.78.52.64/2710.78.52.65 – 10.78.52.9410.78.52.95
3610.78.52.96/2710.78.52.97 – 10.78.52.12610.78.52.127
3710.78.52.128/2710.78.52.129 – 10.78.52.15810.78.52.159
3810.78.52.160/2710.78.52.161 – 10.78.52.19010.78.52.191
3910.78.52.192/2710.78.52.193 – 10.78.52.22210.78.52.223
4010.78.52.224/2710.78.52.225 – 10.78.52.25410.78.52.255
4110.78.53.0/2710.78.53.1 – 10.78.53.3010.78.53.31
4210.78.53.32/2710.78.53.33 – 10.78.53.6210.78.53.63
4310.78.53.64/2710.78.53.65 – 10.78.53.9410.78.53.95
4410.78.53.96/2710.78.53.97 – 10.78.53.12610.78.53.127
4510.78.53.128/2710.78.53.129 – 10.78.53.15810.78.53.159
4610.78.53.160/2710.78.53.161 – 10.78.53.19010.78.53.191
4710.78.53.192/2710.78.53.193 – 10.78.53.22210.78.53.223
4810.78.53.224/2710.78.53.225 – 10.78.53.25410.78.53.255
4910.78.54.0/2710.78.54.1 – 10.78.54.3010.78.54.31
5010.78.54.32/2710.78.54.33 – 10.78.54.6210.78.54.63
5110.78.54.64/2710.78.54.65 – 10.78.54.9410.78.54.95
5210.78.54.96/2710.78.54.97 – 10.78.54.12610.78.54.127
5310.78.54.128/2710.78.54.129 – 10.78.54.15810.78.54.159
5410.78.54.160/2710.78.54.161 – 10.78.54.19010.78.54.191
5510.78.54.192/2710.78.54.193 – 10.78.54.22210.78.54.223
5610.78.54.224/2710.78.54.225 – 10.78.54.25410.78.54.255
5710.78.55.0/2710.78.55.1 – 10.78.55.3010.78.55.31
5810.78.55.32/2710.78.55.33 – 10.78.55.6210.78.55.63
5910.78.55.64/2710.78.55.65 – 10.78.55.9410.78.55.95
6010.78.55.96/2710.78.55.97 – 10.78.55.12610.78.55.127
6110.78.55.128/2710.78.55.129 – 10.78.55.15810.78.55.159
6210.78.55.160/2710.78.55.161 – 10.78.55.19010.78.55.191
6310.78.55.192/2710.78.55.193 – 10.78.55.22210.78.55.223
6410.78.55.224/2710.78.55.225 – 10.78.55.25410.78.55.255
6510.78.56.0/2710.78.56.1 – 10.78.56.3010.78.56.31
6610.78.56.32/2710.78.56.33 – 10.78.56.6210.78.56.63
6710.78.56.64/2710.78.56.65 – 10.78.56.9410.78.56.95
6810.78.56.96/2710.78.56.97 – 10.78.56.12610.78.56.127
6910.78.56.128/2710.78.56.129 – 10.78.56.15810.78.56.159
7010.78.56.160/2710.78.56.161 – 10.78.56.19010.78.56.191
7110.78.56.192/2710.78.56.193 – 10.78.56.22210.78.56.223
7210.78.56.224/2710.78.56.225 – 10.78.56.25410.78.56.255
7310.78.57.0/2710.78.57.1 – 10.78.57.3010.78.57.31
7410.78.57.32/2710.78.57.33 – 10.78.57.6210.78.57.63
7510.78.57.64/2710.78.57.65 – 10.78.57.9410.78.57.95
7610.78.57.96/2710.78.57.97 – 10.78.57.12610.78.57.127
7710.78.57.128/2710.78.57.129 – 10.78.57.15810.78.57.159
7810.78.57.160/2710.78.57.161 – 10.78.57.19010.78.57.191
7910.78.57.192/2710.78.57.193 – 10.78.57.22210.78.57.223
8010.78.57.224/2710.78.57.225 – 10.78.57.25410.78.57.255
8110.78.58.0/2710.78.58.1 – 10.78.58.3010.78.58.31
8210.78.58.32/2710.78.58.33 – 10.78.58.6210.78.58.63
8310.78.58.64/2710.78.58.65 – 10.78.58.9410.78.58.95
8410.78.58.96/2710.78.58.97 – 10.78.58.12610.78.58.127
8510.78.58.128/2710.78.58.129 – 10.78.58.15810.78.58.159
8610.78.58.160/2710.78.58.161 – 10.78.58.19010.78.58.191
8710.78.58.192/2710.78.58.193 – 10.78.58.22210.78.58.223
8810.78.58.224/2710.78.58.225 – 10.78.58.25410.78.58.255
8910.78.59.0/2710.78.59.1 – 10.78.59.3010.78.59.31
9010.78.59.32/2710.78.59.33 – 10.78.59.6210.78.59.63
9110.78.59.64/2710.78.59.65 – 10.78.59.9410.78.59.95
9210.78.59.96/2710.78.59.97 – 10.78.59.12610.78.59.127
9310.78.59.128/2710.78.59.129 – 10.78.59.15810.78.59.159
9410.78.59.160/2710.78.59.161 – 10.78.59.19010.78.59.191
9510.78.59.192/2710.78.59.193 – 10.78.59.22210.78.59.223
9610.78.59.224/2710.78.59.225 – 10.78.59.25410.78.59.255
9710.78.60.0/2710.78.60.1 – 10.78.60.3010.78.60.31
9810.78.60.32/2710.78.60.33 – 10.78.60.6210.78.60.63
9910.78.60.64/2710.78.60.65 – 10.78.60.9410.78.60.95
10010.78.60.96/2710.78.60.97 – 10.78.60.12610.78.60.127
10110.78.60.128/2710.78.60.129 – 10.78.60.15810.78.60.159
10210.78.60.160/2710.78.60.161 – 10.78.60.19010.78.60.191
10310.78.60.192/2710.78.60.193 – 10.78.60.22210.78.60.223
10410.78.60.224/2710.78.60.225 – 10.78.60.25410.78.60.255
10510.78.61.0/2710.78.61.1 – 10.78.61.3010.78.61.31
10610.78.61.32/2710.78.61.33 – 10.78.61.6210.78.61.63
10710.78.61.64/2710.78.61.65 – 10.78.61.9410.78.61.95
10810.78.61.96/2710.78.61.97 – 10.78.61.12610.78.61.127
10910.78.61.128/2710.78.61.129 – 10.78.61.15810.78.61.159
11010.78.61.160/2710.78.61.161 – 10.78.61.19010.78.61.191
11110.78.61.192/2710.78.61.193 – 10.78.61.22210.78.61.223
11210.78.61.224/2710.78.61.225 – 10.78.61.25410.78.61.255
11310.78.62.0/2710.78.62.1 – 10.78.62.3010.78.62.31
11410.78.62.32/2710.78.62.33 – 10.78.62.6210.78.62.63
11510.78.62.64/2710.78.62.65 – 10.78.62.9410.78.62.95
11610.78.62.96/2710.78.62.97 – 10.78.62.12610.78.62.127
11710.78.62.128/2710.78.62.129 – 10.78.62.15810.78.62.159
11810.78.62.160/2710.78.62.161 – 10.78.62.19010.78.62.191
11910.78.62.192/2710.78.62.193 – 10.78.62.22210.78.62.223
12010.78.62.224/2710.78.62.225 – 10.78.62.25410.78.62.255
12110.78.63.0/2710.78.63.1 – 10.78.63.3010.78.63.31
12210.78.63.32/2710.78.63.33 – 10.78.63.6210.78.63.63
12310.78.63.64/2710.78.63.65 – 10.78.63.9410.78.63.95
12410.78.63.96/2710.78.63.97 – 10.78.63.12610.78.63.127
12510.78.63.128/2710.78.63.129 – 10.78.63.15810.78.63.159
12610.78.63.160/2710.78.63.161 – 10.78.63.19010.78.63.191
12710.78.63.192/2710.78.63.193 – 10.78.63.22210.78.63.223
12810.78.63.224/2710.78.63.225 – 10.78.63.25410.78.63.255
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 →