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)10.7.0.0/20
network10.7.0.0/20
broadcast10.7.15.255
first host10.7.0.1
last host10.7.15.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.7.0.0/20
address00001010.00000111.00000000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00000111.00000000.00000000
broadcast00001010.00000111.00001111.11111111
green = network part, grey = host part
hex0x0a070000
decimal168230912
reverse dns0.0.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:0

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.0.0/2710.7.0.1 – 10.7.0.3010.7.0.31
210.7.0.32/2710.7.0.33 – 10.7.0.6210.7.0.63
310.7.0.64/2710.7.0.65 – 10.7.0.9410.7.0.95
410.7.0.96/2710.7.0.97 – 10.7.0.12610.7.0.127
510.7.0.128/2710.7.0.129 – 10.7.0.15810.7.0.159
610.7.0.160/2710.7.0.161 – 10.7.0.19010.7.0.191
710.7.0.192/2710.7.0.193 – 10.7.0.22210.7.0.223
810.7.0.224/2710.7.0.225 – 10.7.0.25410.7.0.255
910.7.1.0/2710.7.1.1 – 10.7.1.3010.7.1.31
1010.7.1.32/2710.7.1.33 – 10.7.1.6210.7.1.63
1110.7.1.64/2710.7.1.65 – 10.7.1.9410.7.1.95
1210.7.1.96/2710.7.1.97 – 10.7.1.12610.7.1.127
1310.7.1.128/2710.7.1.129 – 10.7.1.15810.7.1.159
1410.7.1.160/2710.7.1.161 – 10.7.1.19010.7.1.191
1510.7.1.192/2710.7.1.193 – 10.7.1.22210.7.1.223
1610.7.1.224/2710.7.1.225 – 10.7.1.25410.7.1.255
1710.7.2.0/2710.7.2.1 – 10.7.2.3010.7.2.31
1810.7.2.32/2710.7.2.33 – 10.7.2.6210.7.2.63
1910.7.2.64/2710.7.2.65 – 10.7.2.9410.7.2.95
2010.7.2.96/2710.7.2.97 – 10.7.2.12610.7.2.127
2110.7.2.128/2710.7.2.129 – 10.7.2.15810.7.2.159
2210.7.2.160/2710.7.2.161 – 10.7.2.19010.7.2.191
2310.7.2.192/2710.7.2.193 – 10.7.2.22210.7.2.223
2410.7.2.224/2710.7.2.225 – 10.7.2.25410.7.2.255
2510.7.3.0/2710.7.3.1 – 10.7.3.3010.7.3.31
2610.7.3.32/2710.7.3.33 – 10.7.3.6210.7.3.63
2710.7.3.64/2710.7.3.65 – 10.7.3.9410.7.3.95
2810.7.3.96/2710.7.3.97 – 10.7.3.12610.7.3.127
2910.7.3.128/2710.7.3.129 – 10.7.3.15810.7.3.159
3010.7.3.160/2710.7.3.161 – 10.7.3.19010.7.3.191
3110.7.3.192/2710.7.3.193 – 10.7.3.22210.7.3.223
3210.7.3.224/2710.7.3.225 – 10.7.3.25410.7.3.255
3310.7.4.0/2710.7.4.1 – 10.7.4.3010.7.4.31
3410.7.4.32/2710.7.4.33 – 10.7.4.6210.7.4.63
3510.7.4.64/2710.7.4.65 – 10.7.4.9410.7.4.95
3610.7.4.96/2710.7.4.97 – 10.7.4.12610.7.4.127
3710.7.4.128/2710.7.4.129 – 10.7.4.15810.7.4.159
3810.7.4.160/2710.7.4.161 – 10.7.4.19010.7.4.191
3910.7.4.192/2710.7.4.193 – 10.7.4.22210.7.4.223
4010.7.4.224/2710.7.4.225 – 10.7.4.25410.7.4.255
4110.7.5.0/2710.7.5.1 – 10.7.5.3010.7.5.31
4210.7.5.32/2710.7.5.33 – 10.7.5.6210.7.5.63
4310.7.5.64/2710.7.5.65 – 10.7.5.9410.7.5.95
4410.7.5.96/2710.7.5.97 – 10.7.5.12610.7.5.127
4510.7.5.128/2710.7.5.129 – 10.7.5.15810.7.5.159
4610.7.5.160/2710.7.5.161 – 10.7.5.19010.7.5.191
4710.7.5.192/2710.7.5.193 – 10.7.5.22210.7.5.223
4810.7.5.224/2710.7.5.225 – 10.7.5.25410.7.5.255
4910.7.6.0/2710.7.6.1 – 10.7.6.3010.7.6.31
5010.7.6.32/2710.7.6.33 – 10.7.6.6210.7.6.63
5110.7.6.64/2710.7.6.65 – 10.7.6.9410.7.6.95
5210.7.6.96/2710.7.6.97 – 10.7.6.12610.7.6.127
5310.7.6.128/2710.7.6.129 – 10.7.6.15810.7.6.159
5410.7.6.160/2710.7.6.161 – 10.7.6.19010.7.6.191
5510.7.6.192/2710.7.6.193 – 10.7.6.22210.7.6.223
5610.7.6.224/2710.7.6.225 – 10.7.6.25410.7.6.255
5710.7.7.0/2710.7.7.1 – 10.7.7.3010.7.7.31
5810.7.7.32/2710.7.7.33 – 10.7.7.6210.7.7.63
5910.7.7.64/2710.7.7.65 – 10.7.7.9410.7.7.95
6010.7.7.96/2710.7.7.97 – 10.7.7.12610.7.7.127
6110.7.7.128/2710.7.7.129 – 10.7.7.15810.7.7.159
6210.7.7.160/2710.7.7.161 – 10.7.7.19010.7.7.191
6310.7.7.192/2710.7.7.193 – 10.7.7.22210.7.7.223
6410.7.7.224/2710.7.7.225 – 10.7.7.25410.7.7.255
6510.7.8.0/2710.7.8.1 – 10.7.8.3010.7.8.31
6610.7.8.32/2710.7.8.33 – 10.7.8.6210.7.8.63
6710.7.8.64/2710.7.8.65 – 10.7.8.9410.7.8.95
6810.7.8.96/2710.7.8.97 – 10.7.8.12610.7.8.127
6910.7.8.128/2710.7.8.129 – 10.7.8.15810.7.8.159
7010.7.8.160/2710.7.8.161 – 10.7.8.19010.7.8.191
7110.7.8.192/2710.7.8.193 – 10.7.8.22210.7.8.223
7210.7.8.224/2710.7.8.225 – 10.7.8.25410.7.8.255
7310.7.9.0/2710.7.9.1 – 10.7.9.3010.7.9.31
7410.7.9.32/2710.7.9.33 – 10.7.9.6210.7.9.63
7510.7.9.64/2710.7.9.65 – 10.7.9.9410.7.9.95
7610.7.9.96/2710.7.9.97 – 10.7.9.12610.7.9.127
7710.7.9.128/2710.7.9.129 – 10.7.9.15810.7.9.159
7810.7.9.160/2710.7.9.161 – 10.7.9.19010.7.9.191
7910.7.9.192/2710.7.9.193 – 10.7.9.22210.7.9.223
8010.7.9.224/2710.7.9.225 – 10.7.9.25410.7.9.255
8110.7.10.0/2710.7.10.1 – 10.7.10.3010.7.10.31
8210.7.10.32/2710.7.10.33 – 10.7.10.6210.7.10.63
8310.7.10.64/2710.7.10.65 – 10.7.10.9410.7.10.95
8410.7.10.96/2710.7.10.97 – 10.7.10.12610.7.10.127
8510.7.10.128/2710.7.10.129 – 10.7.10.15810.7.10.159
8610.7.10.160/2710.7.10.161 – 10.7.10.19010.7.10.191
8710.7.10.192/2710.7.10.193 – 10.7.10.22210.7.10.223
8810.7.10.224/2710.7.10.225 – 10.7.10.25410.7.10.255
8910.7.11.0/2710.7.11.1 – 10.7.11.3010.7.11.31
9010.7.11.32/2710.7.11.33 – 10.7.11.6210.7.11.63
9110.7.11.64/2710.7.11.65 – 10.7.11.9410.7.11.95
9210.7.11.96/2710.7.11.97 – 10.7.11.12610.7.11.127
9310.7.11.128/2710.7.11.129 – 10.7.11.15810.7.11.159
9410.7.11.160/2710.7.11.161 – 10.7.11.19010.7.11.191
9510.7.11.192/2710.7.11.193 – 10.7.11.22210.7.11.223
9610.7.11.224/2710.7.11.225 – 10.7.11.25410.7.11.255
9710.7.12.0/2710.7.12.1 – 10.7.12.3010.7.12.31
9810.7.12.32/2710.7.12.33 – 10.7.12.6210.7.12.63
9910.7.12.64/2710.7.12.65 – 10.7.12.9410.7.12.95
10010.7.12.96/2710.7.12.97 – 10.7.12.12610.7.12.127
10110.7.12.128/2710.7.12.129 – 10.7.12.15810.7.12.159
10210.7.12.160/2710.7.12.161 – 10.7.12.19010.7.12.191
10310.7.12.192/2710.7.12.193 – 10.7.12.22210.7.12.223
10410.7.12.224/2710.7.12.225 – 10.7.12.25410.7.12.255
10510.7.13.0/2710.7.13.1 – 10.7.13.3010.7.13.31
10610.7.13.32/2710.7.13.33 – 10.7.13.6210.7.13.63
10710.7.13.64/2710.7.13.65 – 10.7.13.9410.7.13.95
10810.7.13.96/2710.7.13.97 – 10.7.13.12610.7.13.127
10910.7.13.128/2710.7.13.129 – 10.7.13.15810.7.13.159
11010.7.13.160/2710.7.13.161 – 10.7.13.19010.7.13.191
11110.7.13.192/2710.7.13.193 – 10.7.13.22210.7.13.223
11210.7.13.224/2710.7.13.225 – 10.7.13.25410.7.13.255
11310.7.14.0/2710.7.14.1 – 10.7.14.3010.7.14.31
11410.7.14.32/2710.7.14.33 – 10.7.14.6210.7.14.63
11510.7.14.64/2710.7.14.65 – 10.7.14.9410.7.14.95
11610.7.14.96/2710.7.14.97 – 10.7.14.12610.7.14.127
11710.7.14.128/2710.7.14.129 – 10.7.14.15810.7.14.159
11810.7.14.160/2710.7.14.161 – 10.7.14.19010.7.14.191
11910.7.14.192/2710.7.14.193 – 10.7.14.22210.7.14.223
12010.7.14.224/2710.7.14.225 – 10.7.14.25410.7.14.255
12110.7.15.0/2710.7.15.1 – 10.7.15.3010.7.15.31
12210.7.15.32/2710.7.15.33 – 10.7.15.6210.7.15.63
12310.7.15.64/2710.7.15.65 – 10.7.15.9410.7.15.95
12410.7.15.96/2710.7.15.97 – 10.7.15.12610.7.15.127
12510.7.15.128/2710.7.15.129 – 10.7.15.15810.7.15.159
12610.7.15.160/2710.7.15.161 – 10.7.15.19010.7.15.191
12710.7.15.192/2710.7.15.193 – 10.7.15.22210.7.15.223
12810.7.15.224/2710.7.15.225 – 10.7.15.25410.7.15.255
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 →