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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)10.187.52.0/22
network10.187.52.0/22
broadcast10.187.55.255
first host10.187.52.1
last host10.187.55.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.187.52.0/22
address00001010.10111011.00110100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10111011.00110100.00000000
broadcast00001010.10111011.00110111.11111111
green = network part, grey = host part
hex0x0abb3400
decimal180040704
reverse dns0.52.187.10.in-addr.arpa
ipv4-mapped::ffff:abb:3400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.187.52.0/2810.187.52.1 – 10.187.52.1410.187.52.15
210.187.52.16/2810.187.52.17 – 10.187.52.3010.187.52.31
310.187.52.32/2810.187.52.33 – 10.187.52.4610.187.52.47
410.187.52.48/2810.187.52.49 – 10.187.52.6210.187.52.63
510.187.52.64/2810.187.52.65 – 10.187.52.7810.187.52.79
610.187.52.80/2810.187.52.81 – 10.187.52.9410.187.52.95
710.187.52.96/2810.187.52.97 – 10.187.52.11010.187.52.111
810.187.52.112/2810.187.52.113 – 10.187.52.12610.187.52.127
910.187.52.128/2810.187.52.129 – 10.187.52.14210.187.52.143
1010.187.52.144/2810.187.52.145 – 10.187.52.15810.187.52.159
1110.187.52.160/2810.187.52.161 – 10.187.52.17410.187.52.175
1210.187.52.176/2810.187.52.177 – 10.187.52.19010.187.52.191
1310.187.52.192/2810.187.52.193 – 10.187.52.20610.187.52.207
1410.187.52.208/2810.187.52.209 – 10.187.52.22210.187.52.223
1510.187.52.224/2810.187.52.225 – 10.187.52.23810.187.52.239
1610.187.52.240/2810.187.52.241 – 10.187.52.25410.187.52.255
1710.187.53.0/2810.187.53.1 – 10.187.53.1410.187.53.15
1810.187.53.16/2810.187.53.17 – 10.187.53.3010.187.53.31
1910.187.53.32/2810.187.53.33 – 10.187.53.4610.187.53.47
2010.187.53.48/2810.187.53.49 – 10.187.53.6210.187.53.63
2110.187.53.64/2810.187.53.65 – 10.187.53.7810.187.53.79
2210.187.53.80/2810.187.53.81 – 10.187.53.9410.187.53.95
2310.187.53.96/2810.187.53.97 – 10.187.53.11010.187.53.111
2410.187.53.112/2810.187.53.113 – 10.187.53.12610.187.53.127
2510.187.53.128/2810.187.53.129 – 10.187.53.14210.187.53.143
2610.187.53.144/2810.187.53.145 – 10.187.53.15810.187.53.159
2710.187.53.160/2810.187.53.161 – 10.187.53.17410.187.53.175
2810.187.53.176/2810.187.53.177 – 10.187.53.19010.187.53.191
2910.187.53.192/2810.187.53.193 – 10.187.53.20610.187.53.207
3010.187.53.208/2810.187.53.209 – 10.187.53.22210.187.53.223
3110.187.53.224/2810.187.53.225 – 10.187.53.23810.187.53.239
3210.187.53.240/2810.187.53.241 – 10.187.53.25410.187.53.255
3310.187.54.0/2810.187.54.1 – 10.187.54.1410.187.54.15
3410.187.54.16/2810.187.54.17 – 10.187.54.3010.187.54.31
3510.187.54.32/2810.187.54.33 – 10.187.54.4610.187.54.47
3610.187.54.48/2810.187.54.49 – 10.187.54.6210.187.54.63
3710.187.54.64/2810.187.54.65 – 10.187.54.7810.187.54.79
3810.187.54.80/2810.187.54.81 – 10.187.54.9410.187.54.95
3910.187.54.96/2810.187.54.97 – 10.187.54.11010.187.54.111
4010.187.54.112/2810.187.54.113 – 10.187.54.12610.187.54.127
4110.187.54.128/2810.187.54.129 – 10.187.54.14210.187.54.143
4210.187.54.144/2810.187.54.145 – 10.187.54.15810.187.54.159
4310.187.54.160/2810.187.54.161 – 10.187.54.17410.187.54.175
4410.187.54.176/2810.187.54.177 – 10.187.54.19010.187.54.191
4510.187.54.192/2810.187.54.193 – 10.187.54.20610.187.54.207
4610.187.54.208/2810.187.54.209 – 10.187.54.22210.187.54.223
4710.187.54.224/2810.187.54.225 – 10.187.54.23810.187.54.239
4810.187.54.240/2810.187.54.241 – 10.187.54.25410.187.54.255
4910.187.55.0/2810.187.55.1 – 10.187.55.1410.187.55.15
5010.187.55.16/2810.187.55.17 – 10.187.55.3010.187.55.31
5110.187.55.32/2810.187.55.33 – 10.187.55.4610.187.55.47
5210.187.55.48/2810.187.55.49 – 10.187.55.6210.187.55.63
5310.187.55.64/2810.187.55.65 – 10.187.55.7810.187.55.79
5410.187.55.80/2810.187.55.81 – 10.187.55.9410.187.55.95
5510.187.55.96/2810.187.55.97 – 10.187.55.11010.187.55.111
5610.187.55.112/2810.187.55.113 – 10.187.55.12610.187.55.127
5710.187.55.128/2810.187.55.129 – 10.187.55.14210.187.55.143
5810.187.55.144/2810.187.55.145 – 10.187.55.15810.187.55.159
5910.187.55.160/2810.187.55.161 – 10.187.55.17410.187.55.175
6010.187.55.176/2810.187.55.177 – 10.187.55.19010.187.55.191
6110.187.55.192/2810.187.55.193 – 10.187.55.20610.187.55.207
6210.187.55.208/2810.187.55.209 – 10.187.55.22210.187.55.223
6310.187.55.224/2810.187.55.225 – 10.187.55.23810.187.55.239
6410.187.55.240/2810.187.55.241 – 10.187.55.25410.187.55.255
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 →