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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)10.55.60.0/22
network10.55.60.0/22
broadcast10.55.63.255
first host10.55.60.1
last host10.55.63.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.55.60.0/22
address00001010.00110111.00111100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00110111.00111100.00000000
broadcast00001010.00110111.00111111.11111111
green = network part, grey = host part
hex0x0a373c00
decimal171392000
reverse dns0.60.55.10.in-addr.arpa
ipv4-mapped::ffff:a37:3c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.55.60.0/2810.55.60.1 – 10.55.60.1410.55.60.15
210.55.60.16/2810.55.60.17 – 10.55.60.3010.55.60.31
310.55.60.32/2810.55.60.33 – 10.55.60.4610.55.60.47
410.55.60.48/2810.55.60.49 – 10.55.60.6210.55.60.63
510.55.60.64/2810.55.60.65 – 10.55.60.7810.55.60.79
610.55.60.80/2810.55.60.81 – 10.55.60.9410.55.60.95
710.55.60.96/2810.55.60.97 – 10.55.60.11010.55.60.111
810.55.60.112/2810.55.60.113 – 10.55.60.12610.55.60.127
910.55.60.128/2810.55.60.129 – 10.55.60.14210.55.60.143
1010.55.60.144/2810.55.60.145 – 10.55.60.15810.55.60.159
1110.55.60.160/2810.55.60.161 – 10.55.60.17410.55.60.175
1210.55.60.176/2810.55.60.177 – 10.55.60.19010.55.60.191
1310.55.60.192/2810.55.60.193 – 10.55.60.20610.55.60.207
1410.55.60.208/2810.55.60.209 – 10.55.60.22210.55.60.223
1510.55.60.224/2810.55.60.225 – 10.55.60.23810.55.60.239
1610.55.60.240/2810.55.60.241 – 10.55.60.25410.55.60.255
1710.55.61.0/2810.55.61.1 – 10.55.61.1410.55.61.15
1810.55.61.16/2810.55.61.17 – 10.55.61.3010.55.61.31
1910.55.61.32/2810.55.61.33 – 10.55.61.4610.55.61.47
2010.55.61.48/2810.55.61.49 – 10.55.61.6210.55.61.63
2110.55.61.64/2810.55.61.65 – 10.55.61.7810.55.61.79
2210.55.61.80/2810.55.61.81 – 10.55.61.9410.55.61.95
2310.55.61.96/2810.55.61.97 – 10.55.61.11010.55.61.111
2410.55.61.112/2810.55.61.113 – 10.55.61.12610.55.61.127
2510.55.61.128/2810.55.61.129 – 10.55.61.14210.55.61.143
2610.55.61.144/2810.55.61.145 – 10.55.61.15810.55.61.159
2710.55.61.160/2810.55.61.161 – 10.55.61.17410.55.61.175
2810.55.61.176/2810.55.61.177 – 10.55.61.19010.55.61.191
2910.55.61.192/2810.55.61.193 – 10.55.61.20610.55.61.207
3010.55.61.208/2810.55.61.209 – 10.55.61.22210.55.61.223
3110.55.61.224/2810.55.61.225 – 10.55.61.23810.55.61.239
3210.55.61.240/2810.55.61.241 – 10.55.61.25410.55.61.255
3310.55.62.0/2810.55.62.1 – 10.55.62.1410.55.62.15
3410.55.62.16/2810.55.62.17 – 10.55.62.3010.55.62.31
3510.55.62.32/2810.55.62.33 – 10.55.62.4610.55.62.47
3610.55.62.48/2810.55.62.49 – 10.55.62.6210.55.62.63
3710.55.62.64/2810.55.62.65 – 10.55.62.7810.55.62.79
3810.55.62.80/2810.55.62.81 – 10.55.62.9410.55.62.95
3910.55.62.96/2810.55.62.97 – 10.55.62.11010.55.62.111
4010.55.62.112/2810.55.62.113 – 10.55.62.12610.55.62.127
4110.55.62.128/2810.55.62.129 – 10.55.62.14210.55.62.143
4210.55.62.144/2810.55.62.145 – 10.55.62.15810.55.62.159
4310.55.62.160/2810.55.62.161 – 10.55.62.17410.55.62.175
4410.55.62.176/2810.55.62.177 – 10.55.62.19010.55.62.191
4510.55.62.192/2810.55.62.193 – 10.55.62.20610.55.62.207
4610.55.62.208/2810.55.62.209 – 10.55.62.22210.55.62.223
4710.55.62.224/2810.55.62.225 – 10.55.62.23810.55.62.239
4810.55.62.240/2810.55.62.241 – 10.55.62.25410.55.62.255
4910.55.63.0/2810.55.63.1 – 10.55.63.1410.55.63.15
5010.55.63.16/2810.55.63.17 – 10.55.63.3010.55.63.31
5110.55.63.32/2810.55.63.33 – 10.55.63.4610.55.63.47
5210.55.63.48/2810.55.63.49 – 10.55.63.6210.55.63.63
5310.55.63.64/2810.55.63.65 – 10.55.63.7810.55.63.79
5410.55.63.80/2810.55.63.81 – 10.55.63.9410.55.63.95
5510.55.63.96/2810.55.63.97 – 10.55.63.11010.55.63.111
5610.55.63.112/2810.55.63.113 – 10.55.63.12610.55.63.127
5710.55.63.128/2810.55.63.129 – 10.55.63.14210.55.63.143
5810.55.63.144/2810.55.63.145 – 10.55.63.15810.55.63.159
5910.55.63.160/2810.55.63.161 – 10.55.63.17410.55.63.175
6010.55.63.176/2810.55.63.177 – 10.55.63.19010.55.63.191
6110.55.63.192/2810.55.63.193 – 10.55.63.20610.55.63.207
6210.55.63.208/2810.55.63.209 – 10.55.63.22210.55.63.223
6310.55.63.224/2810.55.63.225 – 10.55.63.23810.55.63.239
6410.55.63.240/2810.55.63.241 – 10.55.63.25410.55.63.255
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 →