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)10.167.0.0/20
network10.167.0.0/20
broadcast10.167.15.255
first host10.167.0.1
last host10.167.15.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.167.0.0/20
address00001010.10100111.00000000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.10100111.00000000.00000000
broadcast00001010.10100111.00001111.11111111
green = network part, grey = host part
hex0x0aa70000
decimal178716672
reverse dns0.0.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:0

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.0.0/2710.167.0.1 – 10.167.0.3010.167.0.31
210.167.0.32/2710.167.0.33 – 10.167.0.6210.167.0.63
310.167.0.64/2710.167.0.65 – 10.167.0.9410.167.0.95
410.167.0.96/2710.167.0.97 – 10.167.0.12610.167.0.127
510.167.0.128/2710.167.0.129 – 10.167.0.15810.167.0.159
610.167.0.160/2710.167.0.161 – 10.167.0.19010.167.0.191
710.167.0.192/2710.167.0.193 – 10.167.0.22210.167.0.223
810.167.0.224/2710.167.0.225 – 10.167.0.25410.167.0.255
910.167.1.0/2710.167.1.1 – 10.167.1.3010.167.1.31
1010.167.1.32/2710.167.1.33 – 10.167.1.6210.167.1.63
1110.167.1.64/2710.167.1.65 – 10.167.1.9410.167.1.95
1210.167.1.96/2710.167.1.97 – 10.167.1.12610.167.1.127
1310.167.1.128/2710.167.1.129 – 10.167.1.15810.167.1.159
1410.167.1.160/2710.167.1.161 – 10.167.1.19010.167.1.191
1510.167.1.192/2710.167.1.193 – 10.167.1.22210.167.1.223
1610.167.1.224/2710.167.1.225 – 10.167.1.25410.167.1.255
1710.167.2.0/2710.167.2.1 – 10.167.2.3010.167.2.31
1810.167.2.32/2710.167.2.33 – 10.167.2.6210.167.2.63
1910.167.2.64/2710.167.2.65 – 10.167.2.9410.167.2.95
2010.167.2.96/2710.167.2.97 – 10.167.2.12610.167.2.127
2110.167.2.128/2710.167.2.129 – 10.167.2.15810.167.2.159
2210.167.2.160/2710.167.2.161 – 10.167.2.19010.167.2.191
2310.167.2.192/2710.167.2.193 – 10.167.2.22210.167.2.223
2410.167.2.224/2710.167.2.225 – 10.167.2.25410.167.2.255
2510.167.3.0/2710.167.3.1 – 10.167.3.3010.167.3.31
2610.167.3.32/2710.167.3.33 – 10.167.3.6210.167.3.63
2710.167.3.64/2710.167.3.65 – 10.167.3.9410.167.3.95
2810.167.3.96/2710.167.3.97 – 10.167.3.12610.167.3.127
2910.167.3.128/2710.167.3.129 – 10.167.3.15810.167.3.159
3010.167.3.160/2710.167.3.161 – 10.167.3.19010.167.3.191
3110.167.3.192/2710.167.3.193 – 10.167.3.22210.167.3.223
3210.167.3.224/2710.167.3.225 – 10.167.3.25410.167.3.255
3310.167.4.0/2710.167.4.1 – 10.167.4.3010.167.4.31
3410.167.4.32/2710.167.4.33 – 10.167.4.6210.167.4.63
3510.167.4.64/2710.167.4.65 – 10.167.4.9410.167.4.95
3610.167.4.96/2710.167.4.97 – 10.167.4.12610.167.4.127
3710.167.4.128/2710.167.4.129 – 10.167.4.15810.167.4.159
3810.167.4.160/2710.167.4.161 – 10.167.4.19010.167.4.191
3910.167.4.192/2710.167.4.193 – 10.167.4.22210.167.4.223
4010.167.4.224/2710.167.4.225 – 10.167.4.25410.167.4.255
4110.167.5.0/2710.167.5.1 – 10.167.5.3010.167.5.31
4210.167.5.32/2710.167.5.33 – 10.167.5.6210.167.5.63
4310.167.5.64/2710.167.5.65 – 10.167.5.9410.167.5.95
4410.167.5.96/2710.167.5.97 – 10.167.5.12610.167.5.127
4510.167.5.128/2710.167.5.129 – 10.167.5.15810.167.5.159
4610.167.5.160/2710.167.5.161 – 10.167.5.19010.167.5.191
4710.167.5.192/2710.167.5.193 – 10.167.5.22210.167.5.223
4810.167.5.224/2710.167.5.225 – 10.167.5.25410.167.5.255
4910.167.6.0/2710.167.6.1 – 10.167.6.3010.167.6.31
5010.167.6.32/2710.167.6.33 – 10.167.6.6210.167.6.63
5110.167.6.64/2710.167.6.65 – 10.167.6.9410.167.6.95
5210.167.6.96/2710.167.6.97 – 10.167.6.12610.167.6.127
5310.167.6.128/2710.167.6.129 – 10.167.6.15810.167.6.159
5410.167.6.160/2710.167.6.161 – 10.167.6.19010.167.6.191
5510.167.6.192/2710.167.6.193 – 10.167.6.22210.167.6.223
5610.167.6.224/2710.167.6.225 – 10.167.6.25410.167.6.255
5710.167.7.0/2710.167.7.1 – 10.167.7.3010.167.7.31
5810.167.7.32/2710.167.7.33 – 10.167.7.6210.167.7.63
5910.167.7.64/2710.167.7.65 – 10.167.7.9410.167.7.95
6010.167.7.96/2710.167.7.97 – 10.167.7.12610.167.7.127
6110.167.7.128/2710.167.7.129 – 10.167.7.15810.167.7.159
6210.167.7.160/2710.167.7.161 – 10.167.7.19010.167.7.191
6310.167.7.192/2710.167.7.193 – 10.167.7.22210.167.7.223
6410.167.7.224/2710.167.7.225 – 10.167.7.25410.167.7.255
6510.167.8.0/2710.167.8.1 – 10.167.8.3010.167.8.31
6610.167.8.32/2710.167.8.33 – 10.167.8.6210.167.8.63
6710.167.8.64/2710.167.8.65 – 10.167.8.9410.167.8.95
6810.167.8.96/2710.167.8.97 – 10.167.8.12610.167.8.127
6910.167.8.128/2710.167.8.129 – 10.167.8.15810.167.8.159
7010.167.8.160/2710.167.8.161 – 10.167.8.19010.167.8.191
7110.167.8.192/2710.167.8.193 – 10.167.8.22210.167.8.223
7210.167.8.224/2710.167.8.225 – 10.167.8.25410.167.8.255
7310.167.9.0/2710.167.9.1 – 10.167.9.3010.167.9.31
7410.167.9.32/2710.167.9.33 – 10.167.9.6210.167.9.63
7510.167.9.64/2710.167.9.65 – 10.167.9.9410.167.9.95
7610.167.9.96/2710.167.9.97 – 10.167.9.12610.167.9.127
7710.167.9.128/2710.167.9.129 – 10.167.9.15810.167.9.159
7810.167.9.160/2710.167.9.161 – 10.167.9.19010.167.9.191
7910.167.9.192/2710.167.9.193 – 10.167.9.22210.167.9.223
8010.167.9.224/2710.167.9.225 – 10.167.9.25410.167.9.255
8110.167.10.0/2710.167.10.1 – 10.167.10.3010.167.10.31
8210.167.10.32/2710.167.10.33 – 10.167.10.6210.167.10.63
8310.167.10.64/2710.167.10.65 – 10.167.10.9410.167.10.95
8410.167.10.96/2710.167.10.97 – 10.167.10.12610.167.10.127
8510.167.10.128/2710.167.10.129 – 10.167.10.15810.167.10.159
8610.167.10.160/2710.167.10.161 – 10.167.10.19010.167.10.191
8710.167.10.192/2710.167.10.193 – 10.167.10.22210.167.10.223
8810.167.10.224/2710.167.10.225 – 10.167.10.25410.167.10.255
8910.167.11.0/2710.167.11.1 – 10.167.11.3010.167.11.31
9010.167.11.32/2710.167.11.33 – 10.167.11.6210.167.11.63
9110.167.11.64/2710.167.11.65 – 10.167.11.9410.167.11.95
9210.167.11.96/2710.167.11.97 – 10.167.11.12610.167.11.127
9310.167.11.128/2710.167.11.129 – 10.167.11.15810.167.11.159
9410.167.11.160/2710.167.11.161 – 10.167.11.19010.167.11.191
9510.167.11.192/2710.167.11.193 – 10.167.11.22210.167.11.223
9610.167.11.224/2710.167.11.225 – 10.167.11.25410.167.11.255
9710.167.12.0/2710.167.12.1 – 10.167.12.3010.167.12.31
9810.167.12.32/2710.167.12.33 – 10.167.12.6210.167.12.63
9910.167.12.64/2710.167.12.65 – 10.167.12.9410.167.12.95
10010.167.12.96/2710.167.12.97 – 10.167.12.12610.167.12.127
10110.167.12.128/2710.167.12.129 – 10.167.12.15810.167.12.159
10210.167.12.160/2710.167.12.161 – 10.167.12.19010.167.12.191
10310.167.12.192/2710.167.12.193 – 10.167.12.22210.167.12.223
10410.167.12.224/2710.167.12.225 – 10.167.12.25410.167.12.255
10510.167.13.0/2710.167.13.1 – 10.167.13.3010.167.13.31
10610.167.13.32/2710.167.13.33 – 10.167.13.6210.167.13.63
10710.167.13.64/2710.167.13.65 – 10.167.13.9410.167.13.95
10810.167.13.96/2710.167.13.97 – 10.167.13.12610.167.13.127
10910.167.13.128/2710.167.13.129 – 10.167.13.15810.167.13.159
11010.167.13.160/2710.167.13.161 – 10.167.13.19010.167.13.191
11110.167.13.192/2710.167.13.193 – 10.167.13.22210.167.13.223
11210.167.13.224/2710.167.13.225 – 10.167.13.25410.167.13.255
11310.167.14.0/2710.167.14.1 – 10.167.14.3010.167.14.31
11410.167.14.32/2710.167.14.33 – 10.167.14.6210.167.14.63
11510.167.14.64/2710.167.14.65 – 10.167.14.9410.167.14.95
11610.167.14.96/2710.167.14.97 – 10.167.14.12610.167.14.127
11710.167.14.128/2710.167.14.129 – 10.167.14.15810.167.14.159
11810.167.14.160/2710.167.14.161 – 10.167.14.19010.167.14.191
11910.167.14.192/2710.167.14.193 – 10.167.14.22210.167.14.223
12010.167.14.224/2710.167.14.225 – 10.167.14.25410.167.14.255
12110.167.15.0/2710.167.15.1 – 10.167.15.3010.167.15.31
12210.167.15.32/2710.167.15.33 – 10.167.15.6210.167.15.63
12310.167.15.64/2710.167.15.65 – 10.167.15.9410.167.15.95
12410.167.15.96/2710.167.15.97 – 10.167.15.12610.167.15.127
12510.167.15.128/2710.167.15.129 – 10.167.15.15810.167.15.159
12610.167.15.160/2710.167.15.161 – 10.167.15.19010.167.15.191
12710.167.15.192/2710.167.15.193 – 10.167.15.22210.167.15.223
12810.167.15.224/2710.167.15.225 – 10.167.15.25410.167.15.255
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 →