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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)10.40.96.0/22
network10.40.96.0/22
broadcast10.40.99.255
first host10.40.96.1
last host10.40.99.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.40.96.0/22
address00001010.00101000.01100000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00101000.01100000.00000000
broadcast00001010.00101000.01100011.11111111
green = network part, grey = host part
hex0x0a286000
decimal170418176
reverse dns0.96.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:6000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.40.96.0/2810.40.96.1 – 10.40.96.1410.40.96.15
210.40.96.16/2810.40.96.17 – 10.40.96.3010.40.96.31
310.40.96.32/2810.40.96.33 – 10.40.96.4610.40.96.47
410.40.96.48/2810.40.96.49 – 10.40.96.6210.40.96.63
510.40.96.64/2810.40.96.65 – 10.40.96.7810.40.96.79
610.40.96.80/2810.40.96.81 – 10.40.96.9410.40.96.95
710.40.96.96/2810.40.96.97 – 10.40.96.11010.40.96.111
810.40.96.112/2810.40.96.113 – 10.40.96.12610.40.96.127
910.40.96.128/2810.40.96.129 – 10.40.96.14210.40.96.143
1010.40.96.144/2810.40.96.145 – 10.40.96.15810.40.96.159
1110.40.96.160/2810.40.96.161 – 10.40.96.17410.40.96.175
1210.40.96.176/2810.40.96.177 – 10.40.96.19010.40.96.191
1310.40.96.192/2810.40.96.193 – 10.40.96.20610.40.96.207
1410.40.96.208/2810.40.96.209 – 10.40.96.22210.40.96.223
1510.40.96.224/2810.40.96.225 – 10.40.96.23810.40.96.239
1610.40.96.240/2810.40.96.241 – 10.40.96.25410.40.96.255
1710.40.97.0/2810.40.97.1 – 10.40.97.1410.40.97.15
1810.40.97.16/2810.40.97.17 – 10.40.97.3010.40.97.31
1910.40.97.32/2810.40.97.33 – 10.40.97.4610.40.97.47
2010.40.97.48/2810.40.97.49 – 10.40.97.6210.40.97.63
2110.40.97.64/2810.40.97.65 – 10.40.97.7810.40.97.79
2210.40.97.80/2810.40.97.81 – 10.40.97.9410.40.97.95
2310.40.97.96/2810.40.97.97 – 10.40.97.11010.40.97.111
2410.40.97.112/2810.40.97.113 – 10.40.97.12610.40.97.127
2510.40.97.128/2810.40.97.129 – 10.40.97.14210.40.97.143
2610.40.97.144/2810.40.97.145 – 10.40.97.15810.40.97.159
2710.40.97.160/2810.40.97.161 – 10.40.97.17410.40.97.175
2810.40.97.176/2810.40.97.177 – 10.40.97.19010.40.97.191
2910.40.97.192/2810.40.97.193 – 10.40.97.20610.40.97.207
3010.40.97.208/2810.40.97.209 – 10.40.97.22210.40.97.223
3110.40.97.224/2810.40.97.225 – 10.40.97.23810.40.97.239
3210.40.97.240/2810.40.97.241 – 10.40.97.25410.40.97.255
3310.40.98.0/2810.40.98.1 – 10.40.98.1410.40.98.15
3410.40.98.16/2810.40.98.17 – 10.40.98.3010.40.98.31
3510.40.98.32/2810.40.98.33 – 10.40.98.4610.40.98.47
3610.40.98.48/2810.40.98.49 – 10.40.98.6210.40.98.63
3710.40.98.64/2810.40.98.65 – 10.40.98.7810.40.98.79
3810.40.98.80/2810.40.98.81 – 10.40.98.9410.40.98.95
3910.40.98.96/2810.40.98.97 – 10.40.98.11010.40.98.111
4010.40.98.112/2810.40.98.113 – 10.40.98.12610.40.98.127
4110.40.98.128/2810.40.98.129 – 10.40.98.14210.40.98.143
4210.40.98.144/2810.40.98.145 – 10.40.98.15810.40.98.159
4310.40.98.160/2810.40.98.161 – 10.40.98.17410.40.98.175
4410.40.98.176/2810.40.98.177 – 10.40.98.19010.40.98.191
4510.40.98.192/2810.40.98.193 – 10.40.98.20610.40.98.207
4610.40.98.208/2810.40.98.209 – 10.40.98.22210.40.98.223
4710.40.98.224/2810.40.98.225 – 10.40.98.23810.40.98.239
4810.40.98.240/2810.40.98.241 – 10.40.98.25410.40.98.255
4910.40.99.0/2810.40.99.1 – 10.40.99.1410.40.99.15
5010.40.99.16/2810.40.99.17 – 10.40.99.3010.40.99.31
5110.40.99.32/2810.40.99.33 – 10.40.99.4610.40.99.47
5210.40.99.48/2810.40.99.49 – 10.40.99.6210.40.99.63
5310.40.99.64/2810.40.99.65 – 10.40.99.7810.40.99.79
5410.40.99.80/2810.40.99.81 – 10.40.99.9410.40.99.95
5510.40.99.96/2810.40.99.97 – 10.40.99.11010.40.99.111
5610.40.99.112/2810.40.99.113 – 10.40.99.12610.40.99.127
5710.40.99.128/2810.40.99.129 – 10.40.99.14210.40.99.143
5810.40.99.144/2810.40.99.145 – 10.40.99.15810.40.99.159
5910.40.99.160/2810.40.99.161 – 10.40.99.17410.40.99.175
6010.40.99.176/2810.40.99.177 – 10.40.99.19010.40.99.191
6110.40.99.192/2810.40.99.193 – 10.40.99.20610.40.99.207
6210.40.99.208/2810.40.99.209 – 10.40.99.22210.40.99.223
6310.40.99.224/2810.40.99.225 – 10.40.99.23810.40.99.239
6410.40.99.240/2810.40.99.241 – 10.40.99.25410.40.99.255
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 →