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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)10.87.68.0/22
network10.87.68.0/22
broadcast10.87.71.255
first host10.87.68.1
last host10.87.71.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.87.68.0/22
address00001010.01010111.01000100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01010111.01000100.00000000
broadcast00001010.01010111.01000111.11111111
green = network part, grey = host part
hex0x0a574400
decimal173491200
reverse dns0.68.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:4400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.87.68.0/2810.87.68.1 – 10.87.68.1410.87.68.15
210.87.68.16/2810.87.68.17 – 10.87.68.3010.87.68.31
310.87.68.32/2810.87.68.33 – 10.87.68.4610.87.68.47
410.87.68.48/2810.87.68.49 – 10.87.68.6210.87.68.63
510.87.68.64/2810.87.68.65 – 10.87.68.7810.87.68.79
610.87.68.80/2810.87.68.81 – 10.87.68.9410.87.68.95
710.87.68.96/2810.87.68.97 – 10.87.68.11010.87.68.111
810.87.68.112/2810.87.68.113 – 10.87.68.12610.87.68.127
910.87.68.128/2810.87.68.129 – 10.87.68.14210.87.68.143
1010.87.68.144/2810.87.68.145 – 10.87.68.15810.87.68.159
1110.87.68.160/2810.87.68.161 – 10.87.68.17410.87.68.175
1210.87.68.176/2810.87.68.177 – 10.87.68.19010.87.68.191
1310.87.68.192/2810.87.68.193 – 10.87.68.20610.87.68.207
1410.87.68.208/2810.87.68.209 – 10.87.68.22210.87.68.223
1510.87.68.224/2810.87.68.225 – 10.87.68.23810.87.68.239
1610.87.68.240/2810.87.68.241 – 10.87.68.25410.87.68.255
1710.87.69.0/2810.87.69.1 – 10.87.69.1410.87.69.15
1810.87.69.16/2810.87.69.17 – 10.87.69.3010.87.69.31
1910.87.69.32/2810.87.69.33 – 10.87.69.4610.87.69.47
2010.87.69.48/2810.87.69.49 – 10.87.69.6210.87.69.63
2110.87.69.64/2810.87.69.65 – 10.87.69.7810.87.69.79
2210.87.69.80/2810.87.69.81 – 10.87.69.9410.87.69.95
2310.87.69.96/2810.87.69.97 – 10.87.69.11010.87.69.111
2410.87.69.112/2810.87.69.113 – 10.87.69.12610.87.69.127
2510.87.69.128/2810.87.69.129 – 10.87.69.14210.87.69.143
2610.87.69.144/2810.87.69.145 – 10.87.69.15810.87.69.159
2710.87.69.160/2810.87.69.161 – 10.87.69.17410.87.69.175
2810.87.69.176/2810.87.69.177 – 10.87.69.19010.87.69.191
2910.87.69.192/2810.87.69.193 – 10.87.69.20610.87.69.207
3010.87.69.208/2810.87.69.209 – 10.87.69.22210.87.69.223
3110.87.69.224/2810.87.69.225 – 10.87.69.23810.87.69.239
3210.87.69.240/2810.87.69.241 – 10.87.69.25410.87.69.255
3310.87.70.0/2810.87.70.1 – 10.87.70.1410.87.70.15
3410.87.70.16/2810.87.70.17 – 10.87.70.3010.87.70.31
3510.87.70.32/2810.87.70.33 – 10.87.70.4610.87.70.47
3610.87.70.48/2810.87.70.49 – 10.87.70.6210.87.70.63
3710.87.70.64/2810.87.70.65 – 10.87.70.7810.87.70.79
3810.87.70.80/2810.87.70.81 – 10.87.70.9410.87.70.95
3910.87.70.96/2810.87.70.97 – 10.87.70.11010.87.70.111
4010.87.70.112/2810.87.70.113 – 10.87.70.12610.87.70.127
4110.87.70.128/2810.87.70.129 – 10.87.70.14210.87.70.143
4210.87.70.144/2810.87.70.145 – 10.87.70.15810.87.70.159
4310.87.70.160/2810.87.70.161 – 10.87.70.17410.87.70.175
4410.87.70.176/2810.87.70.177 – 10.87.70.19010.87.70.191
4510.87.70.192/2810.87.70.193 – 10.87.70.20610.87.70.207
4610.87.70.208/2810.87.70.209 – 10.87.70.22210.87.70.223
4710.87.70.224/2810.87.70.225 – 10.87.70.23810.87.70.239
4810.87.70.240/2810.87.70.241 – 10.87.70.25410.87.70.255
4910.87.71.0/2810.87.71.1 – 10.87.71.1410.87.71.15
5010.87.71.16/2810.87.71.17 – 10.87.71.3010.87.71.31
5110.87.71.32/2810.87.71.33 – 10.87.71.4610.87.71.47
5210.87.71.48/2810.87.71.49 – 10.87.71.6210.87.71.63
5310.87.71.64/2810.87.71.65 – 10.87.71.7810.87.71.79
5410.87.71.80/2810.87.71.81 – 10.87.71.9410.87.71.95
5510.87.71.96/2810.87.71.97 – 10.87.71.11010.87.71.111
5610.87.71.112/2810.87.71.113 – 10.87.71.12610.87.71.127
5710.87.71.128/2810.87.71.129 – 10.87.71.14210.87.71.143
5810.87.71.144/2810.87.71.145 – 10.87.71.15810.87.71.159
5910.87.71.160/2810.87.71.161 – 10.87.71.17410.87.71.175
6010.87.71.176/2810.87.71.177 – 10.87.71.19010.87.71.191
6110.87.71.192/2810.87.71.193 – 10.87.71.20610.87.71.207
6210.87.71.208/2810.87.71.209 – 10.87.71.22210.87.71.223
6310.87.71.224/2810.87.71.225 – 10.87.71.23810.87.71.239
6410.87.71.240/2810.87.71.241 – 10.87.71.25410.87.71.255
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 →