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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)10.40.92.0/22
network10.40.92.0/22
broadcast10.40.95.255
first host10.40.92.1
last host10.40.95.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.40.92.0/22
address00001010.00101000.01011100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00101000.01011100.00000000
broadcast00001010.00101000.01011111.11111111
green = network part, grey = host part
hex0x0a285c00
decimal170417152
reverse dns0.92.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:5c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.40.92.0/2810.40.92.1 – 10.40.92.1410.40.92.15
210.40.92.16/2810.40.92.17 – 10.40.92.3010.40.92.31
310.40.92.32/2810.40.92.33 – 10.40.92.4610.40.92.47
410.40.92.48/2810.40.92.49 – 10.40.92.6210.40.92.63
510.40.92.64/2810.40.92.65 – 10.40.92.7810.40.92.79
610.40.92.80/2810.40.92.81 – 10.40.92.9410.40.92.95
710.40.92.96/2810.40.92.97 – 10.40.92.11010.40.92.111
810.40.92.112/2810.40.92.113 – 10.40.92.12610.40.92.127
910.40.92.128/2810.40.92.129 – 10.40.92.14210.40.92.143
1010.40.92.144/2810.40.92.145 – 10.40.92.15810.40.92.159
1110.40.92.160/2810.40.92.161 – 10.40.92.17410.40.92.175
1210.40.92.176/2810.40.92.177 – 10.40.92.19010.40.92.191
1310.40.92.192/2810.40.92.193 – 10.40.92.20610.40.92.207
1410.40.92.208/2810.40.92.209 – 10.40.92.22210.40.92.223
1510.40.92.224/2810.40.92.225 – 10.40.92.23810.40.92.239
1610.40.92.240/2810.40.92.241 – 10.40.92.25410.40.92.255
1710.40.93.0/2810.40.93.1 – 10.40.93.1410.40.93.15
1810.40.93.16/2810.40.93.17 – 10.40.93.3010.40.93.31
1910.40.93.32/2810.40.93.33 – 10.40.93.4610.40.93.47
2010.40.93.48/2810.40.93.49 – 10.40.93.6210.40.93.63
2110.40.93.64/2810.40.93.65 – 10.40.93.7810.40.93.79
2210.40.93.80/2810.40.93.81 – 10.40.93.9410.40.93.95
2310.40.93.96/2810.40.93.97 – 10.40.93.11010.40.93.111
2410.40.93.112/2810.40.93.113 – 10.40.93.12610.40.93.127
2510.40.93.128/2810.40.93.129 – 10.40.93.14210.40.93.143
2610.40.93.144/2810.40.93.145 – 10.40.93.15810.40.93.159
2710.40.93.160/2810.40.93.161 – 10.40.93.17410.40.93.175
2810.40.93.176/2810.40.93.177 – 10.40.93.19010.40.93.191
2910.40.93.192/2810.40.93.193 – 10.40.93.20610.40.93.207
3010.40.93.208/2810.40.93.209 – 10.40.93.22210.40.93.223
3110.40.93.224/2810.40.93.225 – 10.40.93.23810.40.93.239
3210.40.93.240/2810.40.93.241 – 10.40.93.25410.40.93.255
3310.40.94.0/2810.40.94.1 – 10.40.94.1410.40.94.15
3410.40.94.16/2810.40.94.17 – 10.40.94.3010.40.94.31
3510.40.94.32/2810.40.94.33 – 10.40.94.4610.40.94.47
3610.40.94.48/2810.40.94.49 – 10.40.94.6210.40.94.63
3710.40.94.64/2810.40.94.65 – 10.40.94.7810.40.94.79
3810.40.94.80/2810.40.94.81 – 10.40.94.9410.40.94.95
3910.40.94.96/2810.40.94.97 – 10.40.94.11010.40.94.111
4010.40.94.112/2810.40.94.113 – 10.40.94.12610.40.94.127
4110.40.94.128/2810.40.94.129 – 10.40.94.14210.40.94.143
4210.40.94.144/2810.40.94.145 – 10.40.94.15810.40.94.159
4310.40.94.160/2810.40.94.161 – 10.40.94.17410.40.94.175
4410.40.94.176/2810.40.94.177 – 10.40.94.19010.40.94.191
4510.40.94.192/2810.40.94.193 – 10.40.94.20610.40.94.207
4610.40.94.208/2810.40.94.209 – 10.40.94.22210.40.94.223
4710.40.94.224/2810.40.94.225 – 10.40.94.23810.40.94.239
4810.40.94.240/2810.40.94.241 – 10.40.94.25410.40.94.255
4910.40.95.0/2810.40.95.1 – 10.40.95.1410.40.95.15
5010.40.95.16/2810.40.95.17 – 10.40.95.3010.40.95.31
5110.40.95.32/2810.40.95.33 – 10.40.95.4610.40.95.47
5210.40.95.48/2810.40.95.49 – 10.40.95.6210.40.95.63
5310.40.95.64/2810.40.95.65 – 10.40.95.7810.40.95.79
5410.40.95.80/2810.40.95.81 – 10.40.95.9410.40.95.95
5510.40.95.96/2810.40.95.97 – 10.40.95.11010.40.95.111
5610.40.95.112/2810.40.95.113 – 10.40.95.12610.40.95.127
5710.40.95.128/2810.40.95.129 – 10.40.95.14210.40.95.143
5810.40.95.144/2810.40.95.145 – 10.40.95.15810.40.95.159
5910.40.95.160/2810.40.95.161 – 10.40.95.17410.40.95.175
6010.40.95.176/2810.40.95.177 – 10.40.95.19010.40.95.191
6110.40.95.192/2810.40.95.193 – 10.40.95.20610.40.95.207
6210.40.95.208/2810.40.95.209 – 10.40.95.22210.40.95.223
6310.40.95.224/2810.40.95.225 – 10.40.95.23810.40.95.239
6410.40.95.240/2810.40.95.241 – 10.40.95.25410.40.95.255
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 →