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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)10.87.4.0/22
network10.87.4.0/22
broadcast10.87.7.255
first host10.87.4.1
last host10.87.7.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.87.4.0/22
address00001010.01010111.00000100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01010111.00000100.00000000
broadcast00001010.01010111.00000111.11111111
green = network part, grey = host part
hex0x0a570400
decimal173474816
reverse dns0.4.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.87.4.0/2810.87.4.1 – 10.87.4.1410.87.4.15
210.87.4.16/2810.87.4.17 – 10.87.4.3010.87.4.31
310.87.4.32/2810.87.4.33 – 10.87.4.4610.87.4.47
410.87.4.48/2810.87.4.49 – 10.87.4.6210.87.4.63
510.87.4.64/2810.87.4.65 – 10.87.4.7810.87.4.79
610.87.4.80/2810.87.4.81 – 10.87.4.9410.87.4.95
710.87.4.96/2810.87.4.97 – 10.87.4.11010.87.4.111
810.87.4.112/2810.87.4.113 – 10.87.4.12610.87.4.127
910.87.4.128/2810.87.4.129 – 10.87.4.14210.87.4.143
1010.87.4.144/2810.87.4.145 – 10.87.4.15810.87.4.159
1110.87.4.160/2810.87.4.161 – 10.87.4.17410.87.4.175
1210.87.4.176/2810.87.4.177 – 10.87.4.19010.87.4.191
1310.87.4.192/2810.87.4.193 – 10.87.4.20610.87.4.207
1410.87.4.208/2810.87.4.209 – 10.87.4.22210.87.4.223
1510.87.4.224/2810.87.4.225 – 10.87.4.23810.87.4.239
1610.87.4.240/2810.87.4.241 – 10.87.4.25410.87.4.255
1710.87.5.0/2810.87.5.1 – 10.87.5.1410.87.5.15
1810.87.5.16/2810.87.5.17 – 10.87.5.3010.87.5.31
1910.87.5.32/2810.87.5.33 – 10.87.5.4610.87.5.47
2010.87.5.48/2810.87.5.49 – 10.87.5.6210.87.5.63
2110.87.5.64/2810.87.5.65 – 10.87.5.7810.87.5.79
2210.87.5.80/2810.87.5.81 – 10.87.5.9410.87.5.95
2310.87.5.96/2810.87.5.97 – 10.87.5.11010.87.5.111
2410.87.5.112/2810.87.5.113 – 10.87.5.12610.87.5.127
2510.87.5.128/2810.87.5.129 – 10.87.5.14210.87.5.143
2610.87.5.144/2810.87.5.145 – 10.87.5.15810.87.5.159
2710.87.5.160/2810.87.5.161 – 10.87.5.17410.87.5.175
2810.87.5.176/2810.87.5.177 – 10.87.5.19010.87.5.191
2910.87.5.192/2810.87.5.193 – 10.87.5.20610.87.5.207
3010.87.5.208/2810.87.5.209 – 10.87.5.22210.87.5.223
3110.87.5.224/2810.87.5.225 – 10.87.5.23810.87.5.239
3210.87.5.240/2810.87.5.241 – 10.87.5.25410.87.5.255
3310.87.6.0/2810.87.6.1 – 10.87.6.1410.87.6.15
3410.87.6.16/2810.87.6.17 – 10.87.6.3010.87.6.31
3510.87.6.32/2810.87.6.33 – 10.87.6.4610.87.6.47
3610.87.6.48/2810.87.6.49 – 10.87.6.6210.87.6.63
3710.87.6.64/2810.87.6.65 – 10.87.6.7810.87.6.79
3810.87.6.80/2810.87.6.81 – 10.87.6.9410.87.6.95
3910.87.6.96/2810.87.6.97 – 10.87.6.11010.87.6.111
4010.87.6.112/2810.87.6.113 – 10.87.6.12610.87.6.127
4110.87.6.128/2810.87.6.129 – 10.87.6.14210.87.6.143
4210.87.6.144/2810.87.6.145 – 10.87.6.15810.87.6.159
4310.87.6.160/2810.87.6.161 – 10.87.6.17410.87.6.175
4410.87.6.176/2810.87.6.177 – 10.87.6.19010.87.6.191
4510.87.6.192/2810.87.6.193 – 10.87.6.20610.87.6.207
4610.87.6.208/2810.87.6.209 – 10.87.6.22210.87.6.223
4710.87.6.224/2810.87.6.225 – 10.87.6.23810.87.6.239
4810.87.6.240/2810.87.6.241 – 10.87.6.25410.87.6.255
4910.87.7.0/2810.87.7.1 – 10.87.7.1410.87.7.15
5010.87.7.16/2810.87.7.17 – 10.87.7.3010.87.7.31
5110.87.7.32/2810.87.7.33 – 10.87.7.4610.87.7.47
5210.87.7.48/2810.87.7.49 – 10.87.7.6210.87.7.63
5310.87.7.64/2810.87.7.65 – 10.87.7.7810.87.7.79
5410.87.7.80/2810.87.7.81 – 10.87.7.9410.87.7.95
5510.87.7.96/2810.87.7.97 – 10.87.7.11010.87.7.111
5610.87.7.112/2810.87.7.113 – 10.87.7.12610.87.7.127
5710.87.7.128/2810.87.7.129 – 10.87.7.14210.87.7.143
5810.87.7.144/2810.87.7.145 – 10.87.7.15810.87.7.159
5910.87.7.160/2810.87.7.161 – 10.87.7.17410.87.7.175
6010.87.7.176/2810.87.7.177 – 10.87.7.19010.87.7.191
6110.87.7.192/2810.87.7.193 – 10.87.7.20610.87.7.207
6210.87.7.208/2810.87.7.209 – 10.87.7.22210.87.7.223
6310.87.7.224/2810.87.7.225 – 10.87.7.23810.87.7.239
6410.87.7.240/2810.87.7.241 – 10.87.7.25410.87.7.255
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 →