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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)10.3.184.0/22
network10.3.184.0/22
broadcast10.3.187.255
first host10.3.184.1
last host10.3.187.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.184.0/22
address00001010.00000011.10111000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.10111000.00000000
broadcast00001010.00000011.10111011.11111111
green = network part, grey = host part
hex0x0a03b800
decimal168015872
reverse dns0.184.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:b800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.184.0/2810.3.184.1 – 10.3.184.1410.3.184.15
210.3.184.16/2810.3.184.17 – 10.3.184.3010.3.184.31
310.3.184.32/2810.3.184.33 – 10.3.184.4610.3.184.47
410.3.184.48/2810.3.184.49 – 10.3.184.6210.3.184.63
510.3.184.64/2810.3.184.65 – 10.3.184.7810.3.184.79
610.3.184.80/2810.3.184.81 – 10.3.184.9410.3.184.95
710.3.184.96/2810.3.184.97 – 10.3.184.11010.3.184.111
810.3.184.112/2810.3.184.113 – 10.3.184.12610.3.184.127
910.3.184.128/2810.3.184.129 – 10.3.184.14210.3.184.143
1010.3.184.144/2810.3.184.145 – 10.3.184.15810.3.184.159
1110.3.184.160/2810.3.184.161 – 10.3.184.17410.3.184.175
1210.3.184.176/2810.3.184.177 – 10.3.184.19010.3.184.191
1310.3.184.192/2810.3.184.193 – 10.3.184.20610.3.184.207
1410.3.184.208/2810.3.184.209 – 10.3.184.22210.3.184.223
1510.3.184.224/2810.3.184.225 – 10.3.184.23810.3.184.239
1610.3.184.240/2810.3.184.241 – 10.3.184.25410.3.184.255
1710.3.185.0/2810.3.185.1 – 10.3.185.1410.3.185.15
1810.3.185.16/2810.3.185.17 – 10.3.185.3010.3.185.31
1910.3.185.32/2810.3.185.33 – 10.3.185.4610.3.185.47
2010.3.185.48/2810.3.185.49 – 10.3.185.6210.3.185.63
2110.3.185.64/2810.3.185.65 – 10.3.185.7810.3.185.79
2210.3.185.80/2810.3.185.81 – 10.3.185.9410.3.185.95
2310.3.185.96/2810.3.185.97 – 10.3.185.11010.3.185.111
2410.3.185.112/2810.3.185.113 – 10.3.185.12610.3.185.127
2510.3.185.128/2810.3.185.129 – 10.3.185.14210.3.185.143
2610.3.185.144/2810.3.185.145 – 10.3.185.15810.3.185.159
2710.3.185.160/2810.3.185.161 – 10.3.185.17410.3.185.175
2810.3.185.176/2810.3.185.177 – 10.3.185.19010.3.185.191
2910.3.185.192/2810.3.185.193 – 10.3.185.20610.3.185.207
3010.3.185.208/2810.3.185.209 – 10.3.185.22210.3.185.223
3110.3.185.224/2810.3.185.225 – 10.3.185.23810.3.185.239
3210.3.185.240/2810.3.185.241 – 10.3.185.25410.3.185.255
3310.3.186.0/2810.3.186.1 – 10.3.186.1410.3.186.15
3410.3.186.16/2810.3.186.17 – 10.3.186.3010.3.186.31
3510.3.186.32/2810.3.186.33 – 10.3.186.4610.3.186.47
3610.3.186.48/2810.3.186.49 – 10.3.186.6210.3.186.63
3710.3.186.64/2810.3.186.65 – 10.3.186.7810.3.186.79
3810.3.186.80/2810.3.186.81 – 10.3.186.9410.3.186.95
3910.3.186.96/2810.3.186.97 – 10.3.186.11010.3.186.111
4010.3.186.112/2810.3.186.113 – 10.3.186.12610.3.186.127
4110.3.186.128/2810.3.186.129 – 10.3.186.14210.3.186.143
4210.3.186.144/2810.3.186.145 – 10.3.186.15810.3.186.159
4310.3.186.160/2810.3.186.161 – 10.3.186.17410.3.186.175
4410.3.186.176/2810.3.186.177 – 10.3.186.19010.3.186.191
4510.3.186.192/2810.3.186.193 – 10.3.186.20610.3.186.207
4610.3.186.208/2810.3.186.209 – 10.3.186.22210.3.186.223
4710.3.186.224/2810.3.186.225 – 10.3.186.23810.3.186.239
4810.3.186.240/2810.3.186.241 – 10.3.186.25410.3.186.255
4910.3.187.0/2810.3.187.1 – 10.3.187.1410.3.187.15
5010.3.187.16/2810.3.187.17 – 10.3.187.3010.3.187.31
5110.3.187.32/2810.3.187.33 – 10.3.187.4610.3.187.47
5210.3.187.48/2810.3.187.49 – 10.3.187.6210.3.187.63
5310.3.187.64/2810.3.187.65 – 10.3.187.7810.3.187.79
5410.3.187.80/2810.3.187.81 – 10.3.187.9410.3.187.95
5510.3.187.96/2810.3.187.97 – 10.3.187.11010.3.187.111
5610.3.187.112/2810.3.187.113 – 10.3.187.12610.3.187.127
5710.3.187.128/2810.3.187.129 – 10.3.187.14210.3.187.143
5810.3.187.144/2810.3.187.145 – 10.3.187.15810.3.187.159
5910.3.187.160/2810.3.187.161 – 10.3.187.17410.3.187.175
6010.3.187.176/2810.3.187.177 – 10.3.187.19010.3.187.191
6110.3.187.192/2810.3.187.193 – 10.3.187.20610.3.187.207
6210.3.187.208/2810.3.187.209 – 10.3.187.22210.3.187.223
6310.3.187.224/2810.3.187.225 – 10.3.187.23810.3.187.239
6410.3.187.240/2810.3.187.241 – 10.3.187.25410.3.187.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /22
/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-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,0221
/23255.255.254.05125102 split →
/24255.255.255.02562544 split →
/25255.255.255.1281281268 split →
/26255.255.255.192646216 split →
/27255.255.255.224323032 split →
/28255.255.255.240161464 split →
/29255.255.255.24886128 split →
/30255.255.255.25242256 split →
/31255.255.255.25422512 split →
/32255.255.255.255111,024 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 →