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)10.7.48.0/20
network10.7.48.0/20
broadcast10.7.63.255
first host10.7.48.1
last host10.7.63.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.7.48.0/20
address00001010.00000111.00110000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00000111.00110000.00000000
broadcast00001010.00000111.00111111.11111111
green = network part, grey = host part
hex0x0a073000
decimal168243200
reverse dns0.48.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:3000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.48.0/2710.7.48.1 – 10.7.48.3010.7.48.31
210.7.48.32/2710.7.48.33 – 10.7.48.6210.7.48.63
310.7.48.64/2710.7.48.65 – 10.7.48.9410.7.48.95
410.7.48.96/2710.7.48.97 – 10.7.48.12610.7.48.127
510.7.48.128/2710.7.48.129 – 10.7.48.15810.7.48.159
610.7.48.160/2710.7.48.161 – 10.7.48.19010.7.48.191
710.7.48.192/2710.7.48.193 – 10.7.48.22210.7.48.223
810.7.48.224/2710.7.48.225 – 10.7.48.25410.7.48.255
910.7.49.0/2710.7.49.1 – 10.7.49.3010.7.49.31
1010.7.49.32/2710.7.49.33 – 10.7.49.6210.7.49.63
1110.7.49.64/2710.7.49.65 – 10.7.49.9410.7.49.95
1210.7.49.96/2710.7.49.97 – 10.7.49.12610.7.49.127
1310.7.49.128/2710.7.49.129 – 10.7.49.15810.7.49.159
1410.7.49.160/2710.7.49.161 – 10.7.49.19010.7.49.191
1510.7.49.192/2710.7.49.193 – 10.7.49.22210.7.49.223
1610.7.49.224/2710.7.49.225 – 10.7.49.25410.7.49.255
1710.7.50.0/2710.7.50.1 – 10.7.50.3010.7.50.31
1810.7.50.32/2710.7.50.33 – 10.7.50.6210.7.50.63
1910.7.50.64/2710.7.50.65 – 10.7.50.9410.7.50.95
2010.7.50.96/2710.7.50.97 – 10.7.50.12610.7.50.127
2110.7.50.128/2710.7.50.129 – 10.7.50.15810.7.50.159
2210.7.50.160/2710.7.50.161 – 10.7.50.19010.7.50.191
2310.7.50.192/2710.7.50.193 – 10.7.50.22210.7.50.223
2410.7.50.224/2710.7.50.225 – 10.7.50.25410.7.50.255
2510.7.51.0/2710.7.51.1 – 10.7.51.3010.7.51.31
2610.7.51.32/2710.7.51.33 – 10.7.51.6210.7.51.63
2710.7.51.64/2710.7.51.65 – 10.7.51.9410.7.51.95
2810.7.51.96/2710.7.51.97 – 10.7.51.12610.7.51.127
2910.7.51.128/2710.7.51.129 – 10.7.51.15810.7.51.159
3010.7.51.160/2710.7.51.161 – 10.7.51.19010.7.51.191
3110.7.51.192/2710.7.51.193 – 10.7.51.22210.7.51.223
3210.7.51.224/2710.7.51.225 – 10.7.51.25410.7.51.255
3310.7.52.0/2710.7.52.1 – 10.7.52.3010.7.52.31
3410.7.52.32/2710.7.52.33 – 10.7.52.6210.7.52.63
3510.7.52.64/2710.7.52.65 – 10.7.52.9410.7.52.95
3610.7.52.96/2710.7.52.97 – 10.7.52.12610.7.52.127
3710.7.52.128/2710.7.52.129 – 10.7.52.15810.7.52.159
3810.7.52.160/2710.7.52.161 – 10.7.52.19010.7.52.191
3910.7.52.192/2710.7.52.193 – 10.7.52.22210.7.52.223
4010.7.52.224/2710.7.52.225 – 10.7.52.25410.7.52.255
4110.7.53.0/2710.7.53.1 – 10.7.53.3010.7.53.31
4210.7.53.32/2710.7.53.33 – 10.7.53.6210.7.53.63
4310.7.53.64/2710.7.53.65 – 10.7.53.9410.7.53.95
4410.7.53.96/2710.7.53.97 – 10.7.53.12610.7.53.127
4510.7.53.128/2710.7.53.129 – 10.7.53.15810.7.53.159
4610.7.53.160/2710.7.53.161 – 10.7.53.19010.7.53.191
4710.7.53.192/2710.7.53.193 – 10.7.53.22210.7.53.223
4810.7.53.224/2710.7.53.225 – 10.7.53.25410.7.53.255
4910.7.54.0/2710.7.54.1 – 10.7.54.3010.7.54.31
5010.7.54.32/2710.7.54.33 – 10.7.54.6210.7.54.63
5110.7.54.64/2710.7.54.65 – 10.7.54.9410.7.54.95
5210.7.54.96/2710.7.54.97 – 10.7.54.12610.7.54.127
5310.7.54.128/2710.7.54.129 – 10.7.54.15810.7.54.159
5410.7.54.160/2710.7.54.161 – 10.7.54.19010.7.54.191
5510.7.54.192/2710.7.54.193 – 10.7.54.22210.7.54.223
5610.7.54.224/2710.7.54.225 – 10.7.54.25410.7.54.255
5710.7.55.0/2710.7.55.1 – 10.7.55.3010.7.55.31
5810.7.55.32/2710.7.55.33 – 10.7.55.6210.7.55.63
5910.7.55.64/2710.7.55.65 – 10.7.55.9410.7.55.95
6010.7.55.96/2710.7.55.97 – 10.7.55.12610.7.55.127
6110.7.55.128/2710.7.55.129 – 10.7.55.15810.7.55.159
6210.7.55.160/2710.7.55.161 – 10.7.55.19010.7.55.191
6310.7.55.192/2710.7.55.193 – 10.7.55.22210.7.55.223
6410.7.55.224/2710.7.55.225 – 10.7.55.25410.7.55.255
6510.7.56.0/2710.7.56.1 – 10.7.56.3010.7.56.31
6610.7.56.32/2710.7.56.33 – 10.7.56.6210.7.56.63
6710.7.56.64/2710.7.56.65 – 10.7.56.9410.7.56.95
6810.7.56.96/2710.7.56.97 – 10.7.56.12610.7.56.127
6910.7.56.128/2710.7.56.129 – 10.7.56.15810.7.56.159
7010.7.56.160/2710.7.56.161 – 10.7.56.19010.7.56.191
7110.7.56.192/2710.7.56.193 – 10.7.56.22210.7.56.223
7210.7.56.224/2710.7.56.225 – 10.7.56.25410.7.56.255
7310.7.57.0/2710.7.57.1 – 10.7.57.3010.7.57.31
7410.7.57.32/2710.7.57.33 – 10.7.57.6210.7.57.63
7510.7.57.64/2710.7.57.65 – 10.7.57.9410.7.57.95
7610.7.57.96/2710.7.57.97 – 10.7.57.12610.7.57.127
7710.7.57.128/2710.7.57.129 – 10.7.57.15810.7.57.159
7810.7.57.160/2710.7.57.161 – 10.7.57.19010.7.57.191
7910.7.57.192/2710.7.57.193 – 10.7.57.22210.7.57.223
8010.7.57.224/2710.7.57.225 – 10.7.57.25410.7.57.255
8110.7.58.0/2710.7.58.1 – 10.7.58.3010.7.58.31
8210.7.58.32/2710.7.58.33 – 10.7.58.6210.7.58.63
8310.7.58.64/2710.7.58.65 – 10.7.58.9410.7.58.95
8410.7.58.96/2710.7.58.97 – 10.7.58.12610.7.58.127
8510.7.58.128/2710.7.58.129 – 10.7.58.15810.7.58.159
8610.7.58.160/2710.7.58.161 – 10.7.58.19010.7.58.191
8710.7.58.192/2710.7.58.193 – 10.7.58.22210.7.58.223
8810.7.58.224/2710.7.58.225 – 10.7.58.25410.7.58.255
8910.7.59.0/2710.7.59.1 – 10.7.59.3010.7.59.31
9010.7.59.32/2710.7.59.33 – 10.7.59.6210.7.59.63
9110.7.59.64/2710.7.59.65 – 10.7.59.9410.7.59.95
9210.7.59.96/2710.7.59.97 – 10.7.59.12610.7.59.127
9310.7.59.128/2710.7.59.129 – 10.7.59.15810.7.59.159
9410.7.59.160/2710.7.59.161 – 10.7.59.19010.7.59.191
9510.7.59.192/2710.7.59.193 – 10.7.59.22210.7.59.223
9610.7.59.224/2710.7.59.225 – 10.7.59.25410.7.59.255
9710.7.60.0/2710.7.60.1 – 10.7.60.3010.7.60.31
9810.7.60.32/2710.7.60.33 – 10.7.60.6210.7.60.63
9910.7.60.64/2710.7.60.65 – 10.7.60.9410.7.60.95
10010.7.60.96/2710.7.60.97 – 10.7.60.12610.7.60.127
10110.7.60.128/2710.7.60.129 – 10.7.60.15810.7.60.159
10210.7.60.160/2710.7.60.161 – 10.7.60.19010.7.60.191
10310.7.60.192/2710.7.60.193 – 10.7.60.22210.7.60.223
10410.7.60.224/2710.7.60.225 – 10.7.60.25410.7.60.255
10510.7.61.0/2710.7.61.1 – 10.7.61.3010.7.61.31
10610.7.61.32/2710.7.61.33 – 10.7.61.6210.7.61.63
10710.7.61.64/2710.7.61.65 – 10.7.61.9410.7.61.95
10810.7.61.96/2710.7.61.97 – 10.7.61.12610.7.61.127
10910.7.61.128/2710.7.61.129 – 10.7.61.15810.7.61.159
11010.7.61.160/2710.7.61.161 – 10.7.61.19010.7.61.191
11110.7.61.192/2710.7.61.193 – 10.7.61.22210.7.61.223
11210.7.61.224/2710.7.61.225 – 10.7.61.25410.7.61.255
11310.7.62.0/2710.7.62.1 – 10.7.62.3010.7.62.31
11410.7.62.32/2710.7.62.33 – 10.7.62.6210.7.62.63
11510.7.62.64/2710.7.62.65 – 10.7.62.9410.7.62.95
11610.7.62.96/2710.7.62.97 – 10.7.62.12610.7.62.127
11710.7.62.128/2710.7.62.129 – 10.7.62.15810.7.62.159
11810.7.62.160/2710.7.62.161 – 10.7.62.19010.7.62.191
11910.7.62.192/2710.7.62.193 – 10.7.62.22210.7.62.223
12010.7.62.224/2710.7.62.225 – 10.7.62.25410.7.62.255
12110.7.63.0/2710.7.63.1 – 10.7.63.3010.7.63.31
12210.7.63.32/2710.7.63.33 – 10.7.63.6210.7.63.63
12310.7.63.64/2710.7.63.65 – 10.7.63.9410.7.63.95
12410.7.63.96/2710.7.63.97 – 10.7.63.12610.7.63.127
12510.7.63.128/2710.7.63.129 – 10.7.63.15810.7.63.159
12610.7.63.160/2710.7.63.161 – 10.7.63.19010.7.63.191
12710.7.63.192/2710.7.63.193 – 10.7.63.22210.7.63.223
12810.7.63.224/2710.7.63.225 – 10.7.63.25410.7.63.255
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 →