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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)10.3.164.0/22
network10.3.164.0/22
broadcast10.3.167.255
first host10.3.164.1
last host10.3.167.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.164.0/22
address00001010.00000011.10100100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.10100100.00000000
broadcast00001010.00000011.10100111.11111111
green = network part, grey = host part
hex0x0a03a400
decimal168010752
reverse dns0.164.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:a400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.164.0/2810.3.164.1 – 10.3.164.1410.3.164.15
210.3.164.16/2810.3.164.17 – 10.3.164.3010.3.164.31
310.3.164.32/2810.3.164.33 – 10.3.164.4610.3.164.47
410.3.164.48/2810.3.164.49 – 10.3.164.6210.3.164.63
510.3.164.64/2810.3.164.65 – 10.3.164.7810.3.164.79
610.3.164.80/2810.3.164.81 – 10.3.164.9410.3.164.95
710.3.164.96/2810.3.164.97 – 10.3.164.11010.3.164.111
810.3.164.112/2810.3.164.113 – 10.3.164.12610.3.164.127
910.3.164.128/2810.3.164.129 – 10.3.164.14210.3.164.143
1010.3.164.144/2810.3.164.145 – 10.3.164.15810.3.164.159
1110.3.164.160/2810.3.164.161 – 10.3.164.17410.3.164.175
1210.3.164.176/2810.3.164.177 – 10.3.164.19010.3.164.191
1310.3.164.192/2810.3.164.193 – 10.3.164.20610.3.164.207
1410.3.164.208/2810.3.164.209 – 10.3.164.22210.3.164.223
1510.3.164.224/2810.3.164.225 – 10.3.164.23810.3.164.239
1610.3.164.240/2810.3.164.241 – 10.3.164.25410.3.164.255
1710.3.165.0/2810.3.165.1 – 10.3.165.1410.3.165.15
1810.3.165.16/2810.3.165.17 – 10.3.165.3010.3.165.31
1910.3.165.32/2810.3.165.33 – 10.3.165.4610.3.165.47
2010.3.165.48/2810.3.165.49 – 10.3.165.6210.3.165.63
2110.3.165.64/2810.3.165.65 – 10.3.165.7810.3.165.79
2210.3.165.80/2810.3.165.81 – 10.3.165.9410.3.165.95
2310.3.165.96/2810.3.165.97 – 10.3.165.11010.3.165.111
2410.3.165.112/2810.3.165.113 – 10.3.165.12610.3.165.127
2510.3.165.128/2810.3.165.129 – 10.3.165.14210.3.165.143
2610.3.165.144/2810.3.165.145 – 10.3.165.15810.3.165.159
2710.3.165.160/2810.3.165.161 – 10.3.165.17410.3.165.175
2810.3.165.176/2810.3.165.177 – 10.3.165.19010.3.165.191
2910.3.165.192/2810.3.165.193 – 10.3.165.20610.3.165.207
3010.3.165.208/2810.3.165.209 – 10.3.165.22210.3.165.223
3110.3.165.224/2810.3.165.225 – 10.3.165.23810.3.165.239
3210.3.165.240/2810.3.165.241 – 10.3.165.25410.3.165.255
3310.3.166.0/2810.3.166.1 – 10.3.166.1410.3.166.15
3410.3.166.16/2810.3.166.17 – 10.3.166.3010.3.166.31
3510.3.166.32/2810.3.166.33 – 10.3.166.4610.3.166.47
3610.3.166.48/2810.3.166.49 – 10.3.166.6210.3.166.63
3710.3.166.64/2810.3.166.65 – 10.3.166.7810.3.166.79
3810.3.166.80/2810.3.166.81 – 10.3.166.9410.3.166.95
3910.3.166.96/2810.3.166.97 – 10.3.166.11010.3.166.111
4010.3.166.112/2810.3.166.113 – 10.3.166.12610.3.166.127
4110.3.166.128/2810.3.166.129 – 10.3.166.14210.3.166.143
4210.3.166.144/2810.3.166.145 – 10.3.166.15810.3.166.159
4310.3.166.160/2810.3.166.161 – 10.3.166.17410.3.166.175
4410.3.166.176/2810.3.166.177 – 10.3.166.19010.3.166.191
4510.3.166.192/2810.3.166.193 – 10.3.166.20610.3.166.207
4610.3.166.208/2810.3.166.209 – 10.3.166.22210.3.166.223
4710.3.166.224/2810.3.166.225 – 10.3.166.23810.3.166.239
4810.3.166.240/2810.3.166.241 – 10.3.166.25410.3.166.255
4910.3.167.0/2810.3.167.1 – 10.3.167.1410.3.167.15
5010.3.167.16/2810.3.167.17 – 10.3.167.3010.3.167.31
5110.3.167.32/2810.3.167.33 – 10.3.167.4610.3.167.47
5210.3.167.48/2810.3.167.49 – 10.3.167.6210.3.167.63
5310.3.167.64/2810.3.167.65 – 10.3.167.7810.3.167.79
5410.3.167.80/2810.3.167.81 – 10.3.167.9410.3.167.95
5510.3.167.96/2810.3.167.97 – 10.3.167.11010.3.167.111
5610.3.167.112/2810.3.167.113 – 10.3.167.12610.3.167.127
5710.3.167.128/2810.3.167.129 – 10.3.167.14210.3.167.143
5810.3.167.144/2810.3.167.145 – 10.3.167.15810.3.167.159
5910.3.167.160/2810.3.167.161 – 10.3.167.17410.3.167.175
6010.3.167.176/2810.3.167.177 – 10.3.167.19010.3.167.191
6110.3.167.192/2810.3.167.193 – 10.3.167.20610.3.167.207
6210.3.167.208/2810.3.167.209 – 10.3.167.22210.3.167.223
6310.3.167.224/2810.3.167.225 – 10.3.167.23810.3.167.239
6410.3.167.240/2810.3.167.241 – 10.3.167.25410.3.167.255
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 →