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)10.14.128.0/20
network10.14.128.0/20
broadcast10.14.143.255
first host10.14.128.1
last host10.14.143.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.14.128.0/20
address00001010.00001110.10000000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001110.10000000.00000000
broadcast00001010.00001110.10001111.11111111
green = network part, grey = host part
hex0x0a0e8000
decimal168722432
reverse dns0.128.14.10.in-addr.arpa
ipv4-mapped::ffff:a0e:8000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.14.128.0/2710.14.128.1 – 10.14.128.3010.14.128.31
210.14.128.32/2710.14.128.33 – 10.14.128.6210.14.128.63
310.14.128.64/2710.14.128.65 – 10.14.128.9410.14.128.95
410.14.128.96/2710.14.128.97 – 10.14.128.12610.14.128.127
510.14.128.128/2710.14.128.129 – 10.14.128.15810.14.128.159
610.14.128.160/2710.14.128.161 – 10.14.128.19010.14.128.191
710.14.128.192/2710.14.128.193 – 10.14.128.22210.14.128.223
810.14.128.224/2710.14.128.225 – 10.14.128.25410.14.128.255
910.14.129.0/2710.14.129.1 – 10.14.129.3010.14.129.31
1010.14.129.32/2710.14.129.33 – 10.14.129.6210.14.129.63
1110.14.129.64/2710.14.129.65 – 10.14.129.9410.14.129.95
1210.14.129.96/2710.14.129.97 – 10.14.129.12610.14.129.127
1310.14.129.128/2710.14.129.129 – 10.14.129.15810.14.129.159
1410.14.129.160/2710.14.129.161 – 10.14.129.19010.14.129.191
1510.14.129.192/2710.14.129.193 – 10.14.129.22210.14.129.223
1610.14.129.224/2710.14.129.225 – 10.14.129.25410.14.129.255
1710.14.130.0/2710.14.130.1 – 10.14.130.3010.14.130.31
1810.14.130.32/2710.14.130.33 – 10.14.130.6210.14.130.63
1910.14.130.64/2710.14.130.65 – 10.14.130.9410.14.130.95
2010.14.130.96/2710.14.130.97 – 10.14.130.12610.14.130.127
2110.14.130.128/2710.14.130.129 – 10.14.130.15810.14.130.159
2210.14.130.160/2710.14.130.161 – 10.14.130.19010.14.130.191
2310.14.130.192/2710.14.130.193 – 10.14.130.22210.14.130.223
2410.14.130.224/2710.14.130.225 – 10.14.130.25410.14.130.255
2510.14.131.0/2710.14.131.1 – 10.14.131.3010.14.131.31
2610.14.131.32/2710.14.131.33 – 10.14.131.6210.14.131.63
2710.14.131.64/2710.14.131.65 – 10.14.131.9410.14.131.95
2810.14.131.96/2710.14.131.97 – 10.14.131.12610.14.131.127
2910.14.131.128/2710.14.131.129 – 10.14.131.15810.14.131.159
3010.14.131.160/2710.14.131.161 – 10.14.131.19010.14.131.191
3110.14.131.192/2710.14.131.193 – 10.14.131.22210.14.131.223
3210.14.131.224/2710.14.131.225 – 10.14.131.25410.14.131.255
3310.14.132.0/2710.14.132.1 – 10.14.132.3010.14.132.31
3410.14.132.32/2710.14.132.33 – 10.14.132.6210.14.132.63
3510.14.132.64/2710.14.132.65 – 10.14.132.9410.14.132.95
3610.14.132.96/2710.14.132.97 – 10.14.132.12610.14.132.127
3710.14.132.128/2710.14.132.129 – 10.14.132.15810.14.132.159
3810.14.132.160/2710.14.132.161 – 10.14.132.19010.14.132.191
3910.14.132.192/2710.14.132.193 – 10.14.132.22210.14.132.223
4010.14.132.224/2710.14.132.225 – 10.14.132.25410.14.132.255
4110.14.133.0/2710.14.133.1 – 10.14.133.3010.14.133.31
4210.14.133.32/2710.14.133.33 – 10.14.133.6210.14.133.63
4310.14.133.64/2710.14.133.65 – 10.14.133.9410.14.133.95
4410.14.133.96/2710.14.133.97 – 10.14.133.12610.14.133.127
4510.14.133.128/2710.14.133.129 – 10.14.133.15810.14.133.159
4610.14.133.160/2710.14.133.161 – 10.14.133.19010.14.133.191
4710.14.133.192/2710.14.133.193 – 10.14.133.22210.14.133.223
4810.14.133.224/2710.14.133.225 – 10.14.133.25410.14.133.255
4910.14.134.0/2710.14.134.1 – 10.14.134.3010.14.134.31
5010.14.134.32/2710.14.134.33 – 10.14.134.6210.14.134.63
5110.14.134.64/2710.14.134.65 – 10.14.134.9410.14.134.95
5210.14.134.96/2710.14.134.97 – 10.14.134.12610.14.134.127
5310.14.134.128/2710.14.134.129 – 10.14.134.15810.14.134.159
5410.14.134.160/2710.14.134.161 – 10.14.134.19010.14.134.191
5510.14.134.192/2710.14.134.193 – 10.14.134.22210.14.134.223
5610.14.134.224/2710.14.134.225 – 10.14.134.25410.14.134.255
5710.14.135.0/2710.14.135.1 – 10.14.135.3010.14.135.31
5810.14.135.32/2710.14.135.33 – 10.14.135.6210.14.135.63
5910.14.135.64/2710.14.135.65 – 10.14.135.9410.14.135.95
6010.14.135.96/2710.14.135.97 – 10.14.135.12610.14.135.127
6110.14.135.128/2710.14.135.129 – 10.14.135.15810.14.135.159
6210.14.135.160/2710.14.135.161 – 10.14.135.19010.14.135.191
6310.14.135.192/2710.14.135.193 – 10.14.135.22210.14.135.223
6410.14.135.224/2710.14.135.225 – 10.14.135.25410.14.135.255
6510.14.136.0/2710.14.136.1 – 10.14.136.3010.14.136.31
6610.14.136.32/2710.14.136.33 – 10.14.136.6210.14.136.63
6710.14.136.64/2710.14.136.65 – 10.14.136.9410.14.136.95
6810.14.136.96/2710.14.136.97 – 10.14.136.12610.14.136.127
6910.14.136.128/2710.14.136.129 – 10.14.136.15810.14.136.159
7010.14.136.160/2710.14.136.161 – 10.14.136.19010.14.136.191
7110.14.136.192/2710.14.136.193 – 10.14.136.22210.14.136.223
7210.14.136.224/2710.14.136.225 – 10.14.136.25410.14.136.255
7310.14.137.0/2710.14.137.1 – 10.14.137.3010.14.137.31
7410.14.137.32/2710.14.137.33 – 10.14.137.6210.14.137.63
7510.14.137.64/2710.14.137.65 – 10.14.137.9410.14.137.95
7610.14.137.96/2710.14.137.97 – 10.14.137.12610.14.137.127
7710.14.137.128/2710.14.137.129 – 10.14.137.15810.14.137.159
7810.14.137.160/2710.14.137.161 – 10.14.137.19010.14.137.191
7910.14.137.192/2710.14.137.193 – 10.14.137.22210.14.137.223
8010.14.137.224/2710.14.137.225 – 10.14.137.25410.14.137.255
8110.14.138.0/2710.14.138.1 – 10.14.138.3010.14.138.31
8210.14.138.32/2710.14.138.33 – 10.14.138.6210.14.138.63
8310.14.138.64/2710.14.138.65 – 10.14.138.9410.14.138.95
8410.14.138.96/2710.14.138.97 – 10.14.138.12610.14.138.127
8510.14.138.128/2710.14.138.129 – 10.14.138.15810.14.138.159
8610.14.138.160/2710.14.138.161 – 10.14.138.19010.14.138.191
8710.14.138.192/2710.14.138.193 – 10.14.138.22210.14.138.223
8810.14.138.224/2710.14.138.225 – 10.14.138.25410.14.138.255
8910.14.139.0/2710.14.139.1 – 10.14.139.3010.14.139.31
9010.14.139.32/2710.14.139.33 – 10.14.139.6210.14.139.63
9110.14.139.64/2710.14.139.65 – 10.14.139.9410.14.139.95
9210.14.139.96/2710.14.139.97 – 10.14.139.12610.14.139.127
9310.14.139.128/2710.14.139.129 – 10.14.139.15810.14.139.159
9410.14.139.160/2710.14.139.161 – 10.14.139.19010.14.139.191
9510.14.139.192/2710.14.139.193 – 10.14.139.22210.14.139.223
9610.14.139.224/2710.14.139.225 – 10.14.139.25410.14.139.255
9710.14.140.0/2710.14.140.1 – 10.14.140.3010.14.140.31
9810.14.140.32/2710.14.140.33 – 10.14.140.6210.14.140.63
9910.14.140.64/2710.14.140.65 – 10.14.140.9410.14.140.95
10010.14.140.96/2710.14.140.97 – 10.14.140.12610.14.140.127
10110.14.140.128/2710.14.140.129 – 10.14.140.15810.14.140.159
10210.14.140.160/2710.14.140.161 – 10.14.140.19010.14.140.191
10310.14.140.192/2710.14.140.193 – 10.14.140.22210.14.140.223
10410.14.140.224/2710.14.140.225 – 10.14.140.25410.14.140.255
10510.14.141.0/2710.14.141.1 – 10.14.141.3010.14.141.31
10610.14.141.32/2710.14.141.33 – 10.14.141.6210.14.141.63
10710.14.141.64/2710.14.141.65 – 10.14.141.9410.14.141.95
10810.14.141.96/2710.14.141.97 – 10.14.141.12610.14.141.127
10910.14.141.128/2710.14.141.129 – 10.14.141.15810.14.141.159
11010.14.141.160/2710.14.141.161 – 10.14.141.19010.14.141.191
11110.14.141.192/2710.14.141.193 – 10.14.141.22210.14.141.223
11210.14.141.224/2710.14.141.225 – 10.14.141.25410.14.141.255
11310.14.142.0/2710.14.142.1 – 10.14.142.3010.14.142.31
11410.14.142.32/2710.14.142.33 – 10.14.142.6210.14.142.63
11510.14.142.64/2710.14.142.65 – 10.14.142.9410.14.142.95
11610.14.142.96/2710.14.142.97 – 10.14.142.12610.14.142.127
11710.14.142.128/2710.14.142.129 – 10.14.142.15810.14.142.159
11810.14.142.160/2710.14.142.161 – 10.14.142.19010.14.142.191
11910.14.142.192/2710.14.142.193 – 10.14.142.22210.14.142.223
12010.14.142.224/2710.14.142.225 – 10.14.142.25410.14.142.255
12110.14.143.0/2710.14.143.1 – 10.14.143.3010.14.143.31
12210.14.143.32/2710.14.143.33 – 10.14.143.6210.14.143.63
12310.14.143.64/2710.14.143.65 – 10.14.143.9410.14.143.95
12410.14.143.96/2710.14.143.97 – 10.14.143.12610.14.143.127
12510.14.143.128/2710.14.143.129 – 10.14.143.15810.14.143.159
12610.14.143.160/2710.14.143.161 – 10.14.143.19010.14.143.191
12710.14.143.192/2710.14.143.193 – 10.14.143.22210.14.143.223
12810.14.143.224/2710.14.143.225 – 10.14.143.25410.14.143.255
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 →