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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)10.3.36.0/22
network10.3.36.0/22
broadcast10.3.39.255
first host10.3.36.1
last host10.3.39.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.36.0/22
address00001010.00000011.00100100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.00100100.00000000
broadcast00001010.00000011.00100111.11111111
green = network part, grey = host part
hex0x0a032400
decimal167977984
reverse dns0.36.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:2400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.36.0/2810.3.36.1 – 10.3.36.1410.3.36.15
210.3.36.16/2810.3.36.17 – 10.3.36.3010.3.36.31
310.3.36.32/2810.3.36.33 – 10.3.36.4610.3.36.47
410.3.36.48/2810.3.36.49 – 10.3.36.6210.3.36.63
510.3.36.64/2810.3.36.65 – 10.3.36.7810.3.36.79
610.3.36.80/2810.3.36.81 – 10.3.36.9410.3.36.95
710.3.36.96/2810.3.36.97 – 10.3.36.11010.3.36.111
810.3.36.112/2810.3.36.113 – 10.3.36.12610.3.36.127
910.3.36.128/2810.3.36.129 – 10.3.36.14210.3.36.143
1010.3.36.144/2810.3.36.145 – 10.3.36.15810.3.36.159
1110.3.36.160/2810.3.36.161 – 10.3.36.17410.3.36.175
1210.3.36.176/2810.3.36.177 – 10.3.36.19010.3.36.191
1310.3.36.192/2810.3.36.193 – 10.3.36.20610.3.36.207
1410.3.36.208/2810.3.36.209 – 10.3.36.22210.3.36.223
1510.3.36.224/2810.3.36.225 – 10.3.36.23810.3.36.239
1610.3.36.240/2810.3.36.241 – 10.3.36.25410.3.36.255
1710.3.37.0/2810.3.37.1 – 10.3.37.1410.3.37.15
1810.3.37.16/2810.3.37.17 – 10.3.37.3010.3.37.31
1910.3.37.32/2810.3.37.33 – 10.3.37.4610.3.37.47
2010.3.37.48/2810.3.37.49 – 10.3.37.6210.3.37.63
2110.3.37.64/2810.3.37.65 – 10.3.37.7810.3.37.79
2210.3.37.80/2810.3.37.81 – 10.3.37.9410.3.37.95
2310.3.37.96/2810.3.37.97 – 10.3.37.11010.3.37.111
2410.3.37.112/2810.3.37.113 – 10.3.37.12610.3.37.127
2510.3.37.128/2810.3.37.129 – 10.3.37.14210.3.37.143
2610.3.37.144/2810.3.37.145 – 10.3.37.15810.3.37.159
2710.3.37.160/2810.3.37.161 – 10.3.37.17410.3.37.175
2810.3.37.176/2810.3.37.177 – 10.3.37.19010.3.37.191
2910.3.37.192/2810.3.37.193 – 10.3.37.20610.3.37.207
3010.3.37.208/2810.3.37.209 – 10.3.37.22210.3.37.223
3110.3.37.224/2810.3.37.225 – 10.3.37.23810.3.37.239
3210.3.37.240/2810.3.37.241 – 10.3.37.25410.3.37.255
3310.3.38.0/2810.3.38.1 – 10.3.38.1410.3.38.15
3410.3.38.16/2810.3.38.17 – 10.3.38.3010.3.38.31
3510.3.38.32/2810.3.38.33 – 10.3.38.4610.3.38.47
3610.3.38.48/2810.3.38.49 – 10.3.38.6210.3.38.63
3710.3.38.64/2810.3.38.65 – 10.3.38.7810.3.38.79
3810.3.38.80/2810.3.38.81 – 10.3.38.9410.3.38.95
3910.3.38.96/2810.3.38.97 – 10.3.38.11010.3.38.111
4010.3.38.112/2810.3.38.113 – 10.3.38.12610.3.38.127
4110.3.38.128/2810.3.38.129 – 10.3.38.14210.3.38.143
4210.3.38.144/2810.3.38.145 – 10.3.38.15810.3.38.159
4310.3.38.160/2810.3.38.161 – 10.3.38.17410.3.38.175
4410.3.38.176/2810.3.38.177 – 10.3.38.19010.3.38.191
4510.3.38.192/2810.3.38.193 – 10.3.38.20610.3.38.207
4610.3.38.208/2810.3.38.209 – 10.3.38.22210.3.38.223
4710.3.38.224/2810.3.38.225 – 10.3.38.23810.3.38.239
4810.3.38.240/2810.3.38.241 – 10.3.38.25410.3.38.255
4910.3.39.0/2810.3.39.1 – 10.3.39.1410.3.39.15
5010.3.39.16/2810.3.39.17 – 10.3.39.3010.3.39.31
5110.3.39.32/2810.3.39.33 – 10.3.39.4610.3.39.47
5210.3.39.48/2810.3.39.49 – 10.3.39.6210.3.39.63
5310.3.39.64/2810.3.39.65 – 10.3.39.7810.3.39.79
5410.3.39.80/2810.3.39.81 – 10.3.39.9410.3.39.95
5510.3.39.96/2810.3.39.97 – 10.3.39.11010.3.39.111
5610.3.39.112/2810.3.39.113 – 10.3.39.12610.3.39.127
5710.3.39.128/2810.3.39.129 – 10.3.39.14210.3.39.143
5810.3.39.144/2810.3.39.145 – 10.3.39.15810.3.39.159
5910.3.39.160/2810.3.39.161 – 10.3.39.17410.3.39.175
6010.3.39.176/2810.3.39.177 – 10.3.39.19010.3.39.191
6110.3.39.192/2810.3.39.193 – 10.3.39.20610.3.39.207
6210.3.39.208/2810.3.39.209 – 10.3.39.22210.3.39.223
6310.3.39.224/2810.3.39.225 – 10.3.39.23810.3.39.239
6410.3.39.240/2810.3.39.241 – 10.3.39.25410.3.39.255
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 →