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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)10.87.192.0/22
network10.87.192.0/22
broadcast10.87.195.255
first host10.87.192.1
last host10.87.195.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.87.192.0/22
address00001010.01010111.11000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01010111.11000000.00000000
broadcast00001010.01010111.11000011.11111111
green = network part, grey = host part
hex0x0a57c000
decimal173522944
reverse dns0.192.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:c000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.87.192.0/2810.87.192.1 – 10.87.192.1410.87.192.15
210.87.192.16/2810.87.192.17 – 10.87.192.3010.87.192.31
310.87.192.32/2810.87.192.33 – 10.87.192.4610.87.192.47
410.87.192.48/2810.87.192.49 – 10.87.192.6210.87.192.63
510.87.192.64/2810.87.192.65 – 10.87.192.7810.87.192.79
610.87.192.80/2810.87.192.81 – 10.87.192.9410.87.192.95
710.87.192.96/2810.87.192.97 – 10.87.192.11010.87.192.111
810.87.192.112/2810.87.192.113 – 10.87.192.12610.87.192.127
910.87.192.128/2810.87.192.129 – 10.87.192.14210.87.192.143
1010.87.192.144/2810.87.192.145 – 10.87.192.15810.87.192.159
1110.87.192.160/2810.87.192.161 – 10.87.192.17410.87.192.175
1210.87.192.176/2810.87.192.177 – 10.87.192.19010.87.192.191
1310.87.192.192/2810.87.192.193 – 10.87.192.20610.87.192.207
1410.87.192.208/2810.87.192.209 – 10.87.192.22210.87.192.223
1510.87.192.224/2810.87.192.225 – 10.87.192.23810.87.192.239
1610.87.192.240/2810.87.192.241 – 10.87.192.25410.87.192.255
1710.87.193.0/2810.87.193.1 – 10.87.193.1410.87.193.15
1810.87.193.16/2810.87.193.17 – 10.87.193.3010.87.193.31
1910.87.193.32/2810.87.193.33 – 10.87.193.4610.87.193.47
2010.87.193.48/2810.87.193.49 – 10.87.193.6210.87.193.63
2110.87.193.64/2810.87.193.65 – 10.87.193.7810.87.193.79
2210.87.193.80/2810.87.193.81 – 10.87.193.9410.87.193.95
2310.87.193.96/2810.87.193.97 – 10.87.193.11010.87.193.111
2410.87.193.112/2810.87.193.113 – 10.87.193.12610.87.193.127
2510.87.193.128/2810.87.193.129 – 10.87.193.14210.87.193.143
2610.87.193.144/2810.87.193.145 – 10.87.193.15810.87.193.159
2710.87.193.160/2810.87.193.161 – 10.87.193.17410.87.193.175
2810.87.193.176/2810.87.193.177 – 10.87.193.19010.87.193.191
2910.87.193.192/2810.87.193.193 – 10.87.193.20610.87.193.207
3010.87.193.208/2810.87.193.209 – 10.87.193.22210.87.193.223
3110.87.193.224/2810.87.193.225 – 10.87.193.23810.87.193.239
3210.87.193.240/2810.87.193.241 – 10.87.193.25410.87.193.255
3310.87.194.0/2810.87.194.1 – 10.87.194.1410.87.194.15
3410.87.194.16/2810.87.194.17 – 10.87.194.3010.87.194.31
3510.87.194.32/2810.87.194.33 – 10.87.194.4610.87.194.47
3610.87.194.48/2810.87.194.49 – 10.87.194.6210.87.194.63
3710.87.194.64/2810.87.194.65 – 10.87.194.7810.87.194.79
3810.87.194.80/2810.87.194.81 – 10.87.194.9410.87.194.95
3910.87.194.96/2810.87.194.97 – 10.87.194.11010.87.194.111
4010.87.194.112/2810.87.194.113 – 10.87.194.12610.87.194.127
4110.87.194.128/2810.87.194.129 – 10.87.194.14210.87.194.143
4210.87.194.144/2810.87.194.145 – 10.87.194.15810.87.194.159
4310.87.194.160/2810.87.194.161 – 10.87.194.17410.87.194.175
4410.87.194.176/2810.87.194.177 – 10.87.194.19010.87.194.191
4510.87.194.192/2810.87.194.193 – 10.87.194.20610.87.194.207
4610.87.194.208/2810.87.194.209 – 10.87.194.22210.87.194.223
4710.87.194.224/2810.87.194.225 – 10.87.194.23810.87.194.239
4810.87.194.240/2810.87.194.241 – 10.87.194.25410.87.194.255
4910.87.195.0/2810.87.195.1 – 10.87.195.1410.87.195.15
5010.87.195.16/2810.87.195.17 – 10.87.195.3010.87.195.31
5110.87.195.32/2810.87.195.33 – 10.87.195.4610.87.195.47
5210.87.195.48/2810.87.195.49 – 10.87.195.6210.87.195.63
5310.87.195.64/2810.87.195.65 – 10.87.195.7810.87.195.79
5410.87.195.80/2810.87.195.81 – 10.87.195.9410.87.195.95
5510.87.195.96/2810.87.195.97 – 10.87.195.11010.87.195.111
5610.87.195.112/2810.87.195.113 – 10.87.195.12610.87.195.127
5710.87.195.128/2810.87.195.129 – 10.87.195.14210.87.195.143
5810.87.195.144/2810.87.195.145 – 10.87.195.15810.87.195.159
5910.87.195.160/2810.87.195.161 – 10.87.195.17410.87.195.175
6010.87.195.176/2810.87.195.177 – 10.87.195.19010.87.195.191
6110.87.195.192/2810.87.195.193 – 10.87.195.20610.87.195.207
6210.87.195.208/2810.87.195.209 – 10.87.195.22210.87.195.223
6310.87.195.224/2810.87.195.225 – 10.87.195.23810.87.195.239
6410.87.195.240/2810.87.195.241 – 10.87.195.25410.87.195.255
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 →