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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)10.2.204.0/22
network10.2.204.0/22
broadcast10.2.207.255
first host10.2.204.1
last host10.2.207.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.2.204.0/22
address00001010.00000010.11001100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000010.11001100.00000000
broadcast00001010.00000010.11001111.11111111
green = network part, grey = host part
hex0x0a02cc00
decimal167955456
reverse dns0.204.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:cc00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.204.0/2810.2.204.1 – 10.2.204.1410.2.204.15
210.2.204.16/2810.2.204.17 – 10.2.204.3010.2.204.31
310.2.204.32/2810.2.204.33 – 10.2.204.4610.2.204.47
410.2.204.48/2810.2.204.49 – 10.2.204.6210.2.204.63
510.2.204.64/2810.2.204.65 – 10.2.204.7810.2.204.79
610.2.204.80/2810.2.204.81 – 10.2.204.9410.2.204.95
710.2.204.96/2810.2.204.97 – 10.2.204.11010.2.204.111
810.2.204.112/2810.2.204.113 – 10.2.204.12610.2.204.127
910.2.204.128/2810.2.204.129 – 10.2.204.14210.2.204.143
1010.2.204.144/2810.2.204.145 – 10.2.204.15810.2.204.159
1110.2.204.160/2810.2.204.161 – 10.2.204.17410.2.204.175
1210.2.204.176/2810.2.204.177 – 10.2.204.19010.2.204.191
1310.2.204.192/2810.2.204.193 – 10.2.204.20610.2.204.207
1410.2.204.208/2810.2.204.209 – 10.2.204.22210.2.204.223
1510.2.204.224/2810.2.204.225 – 10.2.204.23810.2.204.239
1610.2.204.240/2810.2.204.241 – 10.2.204.25410.2.204.255
1710.2.205.0/2810.2.205.1 – 10.2.205.1410.2.205.15
1810.2.205.16/2810.2.205.17 – 10.2.205.3010.2.205.31
1910.2.205.32/2810.2.205.33 – 10.2.205.4610.2.205.47
2010.2.205.48/2810.2.205.49 – 10.2.205.6210.2.205.63
2110.2.205.64/2810.2.205.65 – 10.2.205.7810.2.205.79
2210.2.205.80/2810.2.205.81 – 10.2.205.9410.2.205.95
2310.2.205.96/2810.2.205.97 – 10.2.205.11010.2.205.111
2410.2.205.112/2810.2.205.113 – 10.2.205.12610.2.205.127
2510.2.205.128/2810.2.205.129 – 10.2.205.14210.2.205.143
2610.2.205.144/2810.2.205.145 – 10.2.205.15810.2.205.159
2710.2.205.160/2810.2.205.161 – 10.2.205.17410.2.205.175
2810.2.205.176/2810.2.205.177 – 10.2.205.19010.2.205.191
2910.2.205.192/2810.2.205.193 – 10.2.205.20610.2.205.207
3010.2.205.208/2810.2.205.209 – 10.2.205.22210.2.205.223
3110.2.205.224/2810.2.205.225 – 10.2.205.23810.2.205.239
3210.2.205.240/2810.2.205.241 – 10.2.205.25410.2.205.255
3310.2.206.0/2810.2.206.1 – 10.2.206.1410.2.206.15
3410.2.206.16/2810.2.206.17 – 10.2.206.3010.2.206.31
3510.2.206.32/2810.2.206.33 – 10.2.206.4610.2.206.47
3610.2.206.48/2810.2.206.49 – 10.2.206.6210.2.206.63
3710.2.206.64/2810.2.206.65 – 10.2.206.7810.2.206.79
3810.2.206.80/2810.2.206.81 – 10.2.206.9410.2.206.95
3910.2.206.96/2810.2.206.97 – 10.2.206.11010.2.206.111
4010.2.206.112/2810.2.206.113 – 10.2.206.12610.2.206.127
4110.2.206.128/2810.2.206.129 – 10.2.206.14210.2.206.143
4210.2.206.144/2810.2.206.145 – 10.2.206.15810.2.206.159
4310.2.206.160/2810.2.206.161 – 10.2.206.17410.2.206.175
4410.2.206.176/2810.2.206.177 – 10.2.206.19010.2.206.191
4510.2.206.192/2810.2.206.193 – 10.2.206.20610.2.206.207
4610.2.206.208/2810.2.206.209 – 10.2.206.22210.2.206.223
4710.2.206.224/2810.2.206.225 – 10.2.206.23810.2.206.239
4810.2.206.240/2810.2.206.241 – 10.2.206.25410.2.206.255
4910.2.207.0/2810.2.207.1 – 10.2.207.1410.2.207.15
5010.2.207.16/2810.2.207.17 – 10.2.207.3010.2.207.31
5110.2.207.32/2810.2.207.33 – 10.2.207.4610.2.207.47
5210.2.207.48/2810.2.207.49 – 10.2.207.6210.2.207.63
5310.2.207.64/2810.2.207.65 – 10.2.207.7810.2.207.79
5410.2.207.80/2810.2.207.81 – 10.2.207.9410.2.207.95
5510.2.207.96/2810.2.207.97 – 10.2.207.11010.2.207.111
5610.2.207.112/2810.2.207.113 – 10.2.207.12610.2.207.127
5710.2.207.128/2810.2.207.129 – 10.2.207.14210.2.207.143
5810.2.207.144/2810.2.207.145 – 10.2.207.15810.2.207.159
5910.2.207.160/2810.2.207.161 – 10.2.207.17410.2.207.175
6010.2.207.176/2810.2.207.177 – 10.2.207.19010.2.207.191
6110.2.207.192/2810.2.207.193 – 10.2.207.20610.2.207.207
6210.2.207.208/2810.2.207.209 – 10.2.207.22210.2.207.223
6310.2.207.224/2810.2.207.225 – 10.2.207.23810.2.207.239
6410.2.207.240/2810.2.207.241 – 10.2.207.25410.2.207.255
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 →