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)10.7.80.0/20
network10.7.80.0/20
broadcast10.7.95.255
first host10.7.80.1
last host10.7.95.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.7.80.0/20
address00001010.00000111.01010000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00000111.01010000.00000000
broadcast00001010.00000111.01011111.11111111
green = network part, grey = host part
hex0x0a075000
decimal168251392
reverse dns0.80.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:5000

/20 split into /27 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.80.0/2710.7.80.1 – 10.7.80.3010.7.80.31
210.7.80.32/2710.7.80.33 – 10.7.80.6210.7.80.63
310.7.80.64/2710.7.80.65 – 10.7.80.9410.7.80.95
410.7.80.96/2710.7.80.97 – 10.7.80.12610.7.80.127
510.7.80.128/2710.7.80.129 – 10.7.80.15810.7.80.159
610.7.80.160/2710.7.80.161 – 10.7.80.19010.7.80.191
710.7.80.192/2710.7.80.193 – 10.7.80.22210.7.80.223
810.7.80.224/2710.7.80.225 – 10.7.80.25410.7.80.255
910.7.81.0/2710.7.81.1 – 10.7.81.3010.7.81.31
1010.7.81.32/2710.7.81.33 – 10.7.81.6210.7.81.63
1110.7.81.64/2710.7.81.65 – 10.7.81.9410.7.81.95
1210.7.81.96/2710.7.81.97 – 10.7.81.12610.7.81.127
1310.7.81.128/2710.7.81.129 – 10.7.81.15810.7.81.159
1410.7.81.160/2710.7.81.161 – 10.7.81.19010.7.81.191
1510.7.81.192/2710.7.81.193 – 10.7.81.22210.7.81.223
1610.7.81.224/2710.7.81.225 – 10.7.81.25410.7.81.255
1710.7.82.0/2710.7.82.1 – 10.7.82.3010.7.82.31
1810.7.82.32/2710.7.82.33 – 10.7.82.6210.7.82.63
1910.7.82.64/2710.7.82.65 – 10.7.82.9410.7.82.95
2010.7.82.96/2710.7.82.97 – 10.7.82.12610.7.82.127
2110.7.82.128/2710.7.82.129 – 10.7.82.15810.7.82.159
2210.7.82.160/2710.7.82.161 – 10.7.82.19010.7.82.191
2310.7.82.192/2710.7.82.193 – 10.7.82.22210.7.82.223
2410.7.82.224/2710.7.82.225 – 10.7.82.25410.7.82.255
2510.7.83.0/2710.7.83.1 – 10.7.83.3010.7.83.31
2610.7.83.32/2710.7.83.33 – 10.7.83.6210.7.83.63
2710.7.83.64/2710.7.83.65 – 10.7.83.9410.7.83.95
2810.7.83.96/2710.7.83.97 – 10.7.83.12610.7.83.127
2910.7.83.128/2710.7.83.129 – 10.7.83.15810.7.83.159
3010.7.83.160/2710.7.83.161 – 10.7.83.19010.7.83.191
3110.7.83.192/2710.7.83.193 – 10.7.83.22210.7.83.223
3210.7.83.224/2710.7.83.225 – 10.7.83.25410.7.83.255
3310.7.84.0/2710.7.84.1 – 10.7.84.3010.7.84.31
3410.7.84.32/2710.7.84.33 – 10.7.84.6210.7.84.63
3510.7.84.64/2710.7.84.65 – 10.7.84.9410.7.84.95
3610.7.84.96/2710.7.84.97 – 10.7.84.12610.7.84.127
3710.7.84.128/2710.7.84.129 – 10.7.84.15810.7.84.159
3810.7.84.160/2710.7.84.161 – 10.7.84.19010.7.84.191
3910.7.84.192/2710.7.84.193 – 10.7.84.22210.7.84.223
4010.7.84.224/2710.7.84.225 – 10.7.84.25410.7.84.255
4110.7.85.0/2710.7.85.1 – 10.7.85.3010.7.85.31
4210.7.85.32/2710.7.85.33 – 10.7.85.6210.7.85.63
4310.7.85.64/2710.7.85.65 – 10.7.85.9410.7.85.95
4410.7.85.96/2710.7.85.97 – 10.7.85.12610.7.85.127
4510.7.85.128/2710.7.85.129 – 10.7.85.15810.7.85.159
4610.7.85.160/2710.7.85.161 – 10.7.85.19010.7.85.191
4710.7.85.192/2710.7.85.193 – 10.7.85.22210.7.85.223
4810.7.85.224/2710.7.85.225 – 10.7.85.25410.7.85.255
4910.7.86.0/2710.7.86.1 – 10.7.86.3010.7.86.31
5010.7.86.32/2710.7.86.33 – 10.7.86.6210.7.86.63
5110.7.86.64/2710.7.86.65 – 10.7.86.9410.7.86.95
5210.7.86.96/2710.7.86.97 – 10.7.86.12610.7.86.127
5310.7.86.128/2710.7.86.129 – 10.7.86.15810.7.86.159
5410.7.86.160/2710.7.86.161 – 10.7.86.19010.7.86.191
5510.7.86.192/2710.7.86.193 – 10.7.86.22210.7.86.223
5610.7.86.224/2710.7.86.225 – 10.7.86.25410.7.86.255
5710.7.87.0/2710.7.87.1 – 10.7.87.3010.7.87.31
5810.7.87.32/2710.7.87.33 – 10.7.87.6210.7.87.63
5910.7.87.64/2710.7.87.65 – 10.7.87.9410.7.87.95
6010.7.87.96/2710.7.87.97 – 10.7.87.12610.7.87.127
6110.7.87.128/2710.7.87.129 – 10.7.87.15810.7.87.159
6210.7.87.160/2710.7.87.161 – 10.7.87.19010.7.87.191
6310.7.87.192/2710.7.87.193 – 10.7.87.22210.7.87.223
6410.7.87.224/2710.7.87.225 – 10.7.87.25410.7.87.255
6510.7.88.0/2710.7.88.1 – 10.7.88.3010.7.88.31
6610.7.88.32/2710.7.88.33 – 10.7.88.6210.7.88.63
6710.7.88.64/2710.7.88.65 – 10.7.88.9410.7.88.95
6810.7.88.96/2710.7.88.97 – 10.7.88.12610.7.88.127
6910.7.88.128/2710.7.88.129 – 10.7.88.15810.7.88.159
7010.7.88.160/2710.7.88.161 – 10.7.88.19010.7.88.191
7110.7.88.192/2710.7.88.193 – 10.7.88.22210.7.88.223
7210.7.88.224/2710.7.88.225 – 10.7.88.25410.7.88.255
7310.7.89.0/2710.7.89.1 – 10.7.89.3010.7.89.31
7410.7.89.32/2710.7.89.33 – 10.7.89.6210.7.89.63
7510.7.89.64/2710.7.89.65 – 10.7.89.9410.7.89.95
7610.7.89.96/2710.7.89.97 – 10.7.89.12610.7.89.127
7710.7.89.128/2710.7.89.129 – 10.7.89.15810.7.89.159
7810.7.89.160/2710.7.89.161 – 10.7.89.19010.7.89.191
7910.7.89.192/2710.7.89.193 – 10.7.89.22210.7.89.223
8010.7.89.224/2710.7.89.225 – 10.7.89.25410.7.89.255
8110.7.90.0/2710.7.90.1 – 10.7.90.3010.7.90.31
8210.7.90.32/2710.7.90.33 – 10.7.90.6210.7.90.63
8310.7.90.64/2710.7.90.65 – 10.7.90.9410.7.90.95
8410.7.90.96/2710.7.90.97 – 10.7.90.12610.7.90.127
8510.7.90.128/2710.7.90.129 – 10.7.90.15810.7.90.159
8610.7.90.160/2710.7.90.161 – 10.7.90.19010.7.90.191
8710.7.90.192/2710.7.90.193 – 10.7.90.22210.7.90.223
8810.7.90.224/2710.7.90.225 – 10.7.90.25410.7.90.255
8910.7.91.0/2710.7.91.1 – 10.7.91.3010.7.91.31
9010.7.91.32/2710.7.91.33 – 10.7.91.6210.7.91.63
9110.7.91.64/2710.7.91.65 – 10.7.91.9410.7.91.95
9210.7.91.96/2710.7.91.97 – 10.7.91.12610.7.91.127
9310.7.91.128/2710.7.91.129 – 10.7.91.15810.7.91.159
9410.7.91.160/2710.7.91.161 – 10.7.91.19010.7.91.191
9510.7.91.192/2710.7.91.193 – 10.7.91.22210.7.91.223
9610.7.91.224/2710.7.91.225 – 10.7.91.25410.7.91.255
9710.7.92.0/2710.7.92.1 – 10.7.92.3010.7.92.31
9810.7.92.32/2710.7.92.33 – 10.7.92.6210.7.92.63
9910.7.92.64/2710.7.92.65 – 10.7.92.9410.7.92.95
10010.7.92.96/2710.7.92.97 – 10.7.92.12610.7.92.127
10110.7.92.128/2710.7.92.129 – 10.7.92.15810.7.92.159
10210.7.92.160/2710.7.92.161 – 10.7.92.19010.7.92.191
10310.7.92.192/2710.7.92.193 – 10.7.92.22210.7.92.223
10410.7.92.224/2710.7.92.225 – 10.7.92.25410.7.92.255
10510.7.93.0/2710.7.93.1 – 10.7.93.3010.7.93.31
10610.7.93.32/2710.7.93.33 – 10.7.93.6210.7.93.63
10710.7.93.64/2710.7.93.65 – 10.7.93.9410.7.93.95
10810.7.93.96/2710.7.93.97 – 10.7.93.12610.7.93.127
10910.7.93.128/2710.7.93.129 – 10.7.93.15810.7.93.159
11010.7.93.160/2710.7.93.161 – 10.7.93.19010.7.93.191
11110.7.93.192/2710.7.93.193 – 10.7.93.22210.7.93.223
11210.7.93.224/2710.7.93.225 – 10.7.93.25410.7.93.255
11310.7.94.0/2710.7.94.1 – 10.7.94.3010.7.94.31
11410.7.94.32/2710.7.94.33 – 10.7.94.6210.7.94.63
11510.7.94.64/2710.7.94.65 – 10.7.94.9410.7.94.95
11610.7.94.96/2710.7.94.97 – 10.7.94.12610.7.94.127
11710.7.94.128/2710.7.94.129 – 10.7.94.15810.7.94.159
11810.7.94.160/2710.7.94.161 – 10.7.94.19010.7.94.191
11910.7.94.192/2710.7.94.193 – 10.7.94.22210.7.94.223
12010.7.94.224/2710.7.94.225 – 10.7.94.25410.7.94.255
12110.7.95.0/2710.7.95.1 – 10.7.95.3010.7.95.31
12210.7.95.32/2710.7.95.33 – 10.7.95.6210.7.95.63
12310.7.95.64/2710.7.95.65 – 10.7.95.9410.7.95.95
12410.7.95.96/2710.7.95.97 – 10.7.95.12610.7.95.127
12510.7.95.128/2710.7.95.129 – 10.7.95.15810.7.95.159
12610.7.95.160/2710.7.95.161 – 10.7.95.19010.7.95.191
12710.7.95.192/2710.7.95.193 – 10.7.95.22210.7.95.223
12810.7.95.224/2710.7.95.225 – 10.7.95.25410.7.95.255
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 →