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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)10.1.16.0/22
network10.1.16.0/22
broadcast10.1.19.255
first host10.1.16.1
last host10.1.19.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.1.16.0/22
address00001010.00000001.00010000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000001.00010000.00000000
broadcast00001010.00000001.00010011.11111111
green = network part, grey = host part
hex0x0a011000
decimal167841792
reverse dns0.16.1.10.in-addr.arpa
ipv4-mapped::ffff:a01:1000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.1.16.0/2810.1.16.1 – 10.1.16.1410.1.16.15
210.1.16.16/2810.1.16.17 – 10.1.16.3010.1.16.31
310.1.16.32/2810.1.16.33 – 10.1.16.4610.1.16.47
410.1.16.48/2810.1.16.49 – 10.1.16.6210.1.16.63
510.1.16.64/2810.1.16.65 – 10.1.16.7810.1.16.79
610.1.16.80/2810.1.16.81 – 10.1.16.9410.1.16.95
710.1.16.96/2810.1.16.97 – 10.1.16.11010.1.16.111
810.1.16.112/2810.1.16.113 – 10.1.16.12610.1.16.127
910.1.16.128/2810.1.16.129 – 10.1.16.14210.1.16.143
1010.1.16.144/2810.1.16.145 – 10.1.16.15810.1.16.159
1110.1.16.160/2810.1.16.161 – 10.1.16.17410.1.16.175
1210.1.16.176/2810.1.16.177 – 10.1.16.19010.1.16.191
1310.1.16.192/2810.1.16.193 – 10.1.16.20610.1.16.207
1410.1.16.208/2810.1.16.209 – 10.1.16.22210.1.16.223
1510.1.16.224/2810.1.16.225 – 10.1.16.23810.1.16.239
1610.1.16.240/2810.1.16.241 – 10.1.16.25410.1.16.255
1710.1.17.0/2810.1.17.1 – 10.1.17.1410.1.17.15
1810.1.17.16/2810.1.17.17 – 10.1.17.3010.1.17.31
1910.1.17.32/2810.1.17.33 – 10.1.17.4610.1.17.47
2010.1.17.48/2810.1.17.49 – 10.1.17.6210.1.17.63
2110.1.17.64/2810.1.17.65 – 10.1.17.7810.1.17.79
2210.1.17.80/2810.1.17.81 – 10.1.17.9410.1.17.95
2310.1.17.96/2810.1.17.97 – 10.1.17.11010.1.17.111
2410.1.17.112/2810.1.17.113 – 10.1.17.12610.1.17.127
2510.1.17.128/2810.1.17.129 – 10.1.17.14210.1.17.143
2610.1.17.144/2810.1.17.145 – 10.1.17.15810.1.17.159
2710.1.17.160/2810.1.17.161 – 10.1.17.17410.1.17.175
2810.1.17.176/2810.1.17.177 – 10.1.17.19010.1.17.191
2910.1.17.192/2810.1.17.193 – 10.1.17.20610.1.17.207
3010.1.17.208/2810.1.17.209 – 10.1.17.22210.1.17.223
3110.1.17.224/2810.1.17.225 – 10.1.17.23810.1.17.239
3210.1.17.240/2810.1.17.241 – 10.1.17.25410.1.17.255
3310.1.18.0/2810.1.18.1 – 10.1.18.1410.1.18.15
3410.1.18.16/2810.1.18.17 – 10.1.18.3010.1.18.31
3510.1.18.32/2810.1.18.33 – 10.1.18.4610.1.18.47
3610.1.18.48/2810.1.18.49 – 10.1.18.6210.1.18.63
3710.1.18.64/2810.1.18.65 – 10.1.18.7810.1.18.79
3810.1.18.80/2810.1.18.81 – 10.1.18.9410.1.18.95
3910.1.18.96/2810.1.18.97 – 10.1.18.11010.1.18.111
4010.1.18.112/2810.1.18.113 – 10.1.18.12610.1.18.127
4110.1.18.128/2810.1.18.129 – 10.1.18.14210.1.18.143
4210.1.18.144/2810.1.18.145 – 10.1.18.15810.1.18.159
4310.1.18.160/2810.1.18.161 – 10.1.18.17410.1.18.175
4410.1.18.176/2810.1.18.177 – 10.1.18.19010.1.18.191
4510.1.18.192/2810.1.18.193 – 10.1.18.20610.1.18.207
4610.1.18.208/2810.1.18.209 – 10.1.18.22210.1.18.223
4710.1.18.224/2810.1.18.225 – 10.1.18.23810.1.18.239
4810.1.18.240/2810.1.18.241 – 10.1.18.25410.1.18.255
4910.1.19.0/2810.1.19.1 – 10.1.19.1410.1.19.15
5010.1.19.16/2810.1.19.17 – 10.1.19.3010.1.19.31
5110.1.19.32/2810.1.19.33 – 10.1.19.4610.1.19.47
5210.1.19.48/2810.1.19.49 – 10.1.19.6210.1.19.63
5310.1.19.64/2810.1.19.65 – 10.1.19.7810.1.19.79
5410.1.19.80/2810.1.19.81 – 10.1.19.9410.1.19.95
5510.1.19.96/2810.1.19.97 – 10.1.19.11010.1.19.111
5610.1.19.112/2810.1.19.113 – 10.1.19.12610.1.19.127
5710.1.19.128/2810.1.19.129 – 10.1.19.14210.1.19.143
5810.1.19.144/2810.1.19.145 – 10.1.19.15810.1.19.159
5910.1.19.160/2810.1.19.161 – 10.1.19.17410.1.19.175
6010.1.19.176/2810.1.19.177 – 10.1.19.19010.1.19.191
6110.1.19.192/2810.1.19.193 – 10.1.19.20610.1.19.207
6210.1.19.208/2810.1.19.209 – 10.1.19.22210.1.19.223
6310.1.19.224/2810.1.19.225 – 10.1.19.23810.1.19.239
6410.1.19.240/2810.1.19.241 – 10.1.19.25410.1.19.255
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 →