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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)10.187.32.0/22
network10.187.32.0/22
broadcast10.187.35.255
first host10.187.32.1
last host10.187.35.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.187.32.0/22
address00001010.10111011.00100000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10111011.00100000.00000000
broadcast00001010.10111011.00100011.11111111
green = network part, grey = host part
hex0x0abb2000
decimal180035584
reverse dns0.32.187.10.in-addr.arpa
ipv4-mapped::ffff:abb:2000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.187.32.0/2810.187.32.1 – 10.187.32.1410.187.32.15
210.187.32.16/2810.187.32.17 – 10.187.32.3010.187.32.31
310.187.32.32/2810.187.32.33 – 10.187.32.4610.187.32.47
410.187.32.48/2810.187.32.49 – 10.187.32.6210.187.32.63
510.187.32.64/2810.187.32.65 – 10.187.32.7810.187.32.79
610.187.32.80/2810.187.32.81 – 10.187.32.9410.187.32.95
710.187.32.96/2810.187.32.97 – 10.187.32.11010.187.32.111
810.187.32.112/2810.187.32.113 – 10.187.32.12610.187.32.127
910.187.32.128/2810.187.32.129 – 10.187.32.14210.187.32.143
1010.187.32.144/2810.187.32.145 – 10.187.32.15810.187.32.159
1110.187.32.160/2810.187.32.161 – 10.187.32.17410.187.32.175
1210.187.32.176/2810.187.32.177 – 10.187.32.19010.187.32.191
1310.187.32.192/2810.187.32.193 – 10.187.32.20610.187.32.207
1410.187.32.208/2810.187.32.209 – 10.187.32.22210.187.32.223
1510.187.32.224/2810.187.32.225 – 10.187.32.23810.187.32.239
1610.187.32.240/2810.187.32.241 – 10.187.32.25410.187.32.255
1710.187.33.0/2810.187.33.1 – 10.187.33.1410.187.33.15
1810.187.33.16/2810.187.33.17 – 10.187.33.3010.187.33.31
1910.187.33.32/2810.187.33.33 – 10.187.33.4610.187.33.47
2010.187.33.48/2810.187.33.49 – 10.187.33.6210.187.33.63
2110.187.33.64/2810.187.33.65 – 10.187.33.7810.187.33.79
2210.187.33.80/2810.187.33.81 – 10.187.33.9410.187.33.95
2310.187.33.96/2810.187.33.97 – 10.187.33.11010.187.33.111
2410.187.33.112/2810.187.33.113 – 10.187.33.12610.187.33.127
2510.187.33.128/2810.187.33.129 – 10.187.33.14210.187.33.143
2610.187.33.144/2810.187.33.145 – 10.187.33.15810.187.33.159
2710.187.33.160/2810.187.33.161 – 10.187.33.17410.187.33.175
2810.187.33.176/2810.187.33.177 – 10.187.33.19010.187.33.191
2910.187.33.192/2810.187.33.193 – 10.187.33.20610.187.33.207
3010.187.33.208/2810.187.33.209 – 10.187.33.22210.187.33.223
3110.187.33.224/2810.187.33.225 – 10.187.33.23810.187.33.239
3210.187.33.240/2810.187.33.241 – 10.187.33.25410.187.33.255
3310.187.34.0/2810.187.34.1 – 10.187.34.1410.187.34.15
3410.187.34.16/2810.187.34.17 – 10.187.34.3010.187.34.31
3510.187.34.32/2810.187.34.33 – 10.187.34.4610.187.34.47
3610.187.34.48/2810.187.34.49 – 10.187.34.6210.187.34.63
3710.187.34.64/2810.187.34.65 – 10.187.34.7810.187.34.79
3810.187.34.80/2810.187.34.81 – 10.187.34.9410.187.34.95
3910.187.34.96/2810.187.34.97 – 10.187.34.11010.187.34.111
4010.187.34.112/2810.187.34.113 – 10.187.34.12610.187.34.127
4110.187.34.128/2810.187.34.129 – 10.187.34.14210.187.34.143
4210.187.34.144/2810.187.34.145 – 10.187.34.15810.187.34.159
4310.187.34.160/2810.187.34.161 – 10.187.34.17410.187.34.175
4410.187.34.176/2810.187.34.177 – 10.187.34.19010.187.34.191
4510.187.34.192/2810.187.34.193 – 10.187.34.20610.187.34.207
4610.187.34.208/2810.187.34.209 – 10.187.34.22210.187.34.223
4710.187.34.224/2810.187.34.225 – 10.187.34.23810.187.34.239
4810.187.34.240/2810.187.34.241 – 10.187.34.25410.187.34.255
4910.187.35.0/2810.187.35.1 – 10.187.35.1410.187.35.15
5010.187.35.16/2810.187.35.17 – 10.187.35.3010.187.35.31
5110.187.35.32/2810.187.35.33 – 10.187.35.4610.187.35.47
5210.187.35.48/2810.187.35.49 – 10.187.35.6210.187.35.63
5310.187.35.64/2810.187.35.65 – 10.187.35.7810.187.35.79
5410.187.35.80/2810.187.35.81 – 10.187.35.9410.187.35.95
5510.187.35.96/2810.187.35.97 – 10.187.35.11010.187.35.111
5610.187.35.112/2810.187.35.113 – 10.187.35.12610.187.35.127
5710.187.35.128/2810.187.35.129 – 10.187.35.14210.187.35.143
5810.187.35.144/2810.187.35.145 – 10.187.35.15810.187.35.159
5910.187.35.160/2810.187.35.161 – 10.187.35.17410.187.35.175
6010.187.35.176/2810.187.35.177 – 10.187.35.19010.187.35.191
6110.187.35.192/2810.187.35.193 – 10.187.35.20610.187.35.207
6210.187.35.208/2810.187.35.209 – 10.187.35.22210.187.35.223
6310.187.35.224/2810.187.35.225 – 10.187.35.23810.187.35.239
6410.187.35.240/2810.187.35.241 – 10.187.35.25410.187.35.255
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 →