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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)10.3.156.0/22
network10.3.156.0/22
broadcast10.3.159.255
first host10.3.156.1
last host10.3.159.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.156.0/22
address00001010.00000011.10011100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.10011100.00000000
broadcast00001010.00000011.10011111.11111111
green = network part, grey = host part
hex0x0a039c00
decimal168008704
reverse dns0.156.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:9c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.156.0/2810.3.156.1 – 10.3.156.1410.3.156.15
210.3.156.16/2810.3.156.17 – 10.3.156.3010.3.156.31
310.3.156.32/2810.3.156.33 – 10.3.156.4610.3.156.47
410.3.156.48/2810.3.156.49 – 10.3.156.6210.3.156.63
510.3.156.64/2810.3.156.65 – 10.3.156.7810.3.156.79
610.3.156.80/2810.3.156.81 – 10.3.156.9410.3.156.95
710.3.156.96/2810.3.156.97 – 10.3.156.11010.3.156.111
810.3.156.112/2810.3.156.113 – 10.3.156.12610.3.156.127
910.3.156.128/2810.3.156.129 – 10.3.156.14210.3.156.143
1010.3.156.144/2810.3.156.145 – 10.3.156.15810.3.156.159
1110.3.156.160/2810.3.156.161 – 10.3.156.17410.3.156.175
1210.3.156.176/2810.3.156.177 – 10.3.156.19010.3.156.191
1310.3.156.192/2810.3.156.193 – 10.3.156.20610.3.156.207
1410.3.156.208/2810.3.156.209 – 10.3.156.22210.3.156.223
1510.3.156.224/2810.3.156.225 – 10.3.156.23810.3.156.239
1610.3.156.240/2810.3.156.241 – 10.3.156.25410.3.156.255
1710.3.157.0/2810.3.157.1 – 10.3.157.1410.3.157.15
1810.3.157.16/2810.3.157.17 – 10.3.157.3010.3.157.31
1910.3.157.32/2810.3.157.33 – 10.3.157.4610.3.157.47
2010.3.157.48/2810.3.157.49 – 10.3.157.6210.3.157.63
2110.3.157.64/2810.3.157.65 – 10.3.157.7810.3.157.79
2210.3.157.80/2810.3.157.81 – 10.3.157.9410.3.157.95
2310.3.157.96/2810.3.157.97 – 10.3.157.11010.3.157.111
2410.3.157.112/2810.3.157.113 – 10.3.157.12610.3.157.127
2510.3.157.128/2810.3.157.129 – 10.3.157.14210.3.157.143
2610.3.157.144/2810.3.157.145 – 10.3.157.15810.3.157.159
2710.3.157.160/2810.3.157.161 – 10.3.157.17410.3.157.175
2810.3.157.176/2810.3.157.177 – 10.3.157.19010.3.157.191
2910.3.157.192/2810.3.157.193 – 10.3.157.20610.3.157.207
3010.3.157.208/2810.3.157.209 – 10.3.157.22210.3.157.223
3110.3.157.224/2810.3.157.225 – 10.3.157.23810.3.157.239
3210.3.157.240/2810.3.157.241 – 10.3.157.25410.3.157.255
3310.3.158.0/2810.3.158.1 – 10.3.158.1410.3.158.15
3410.3.158.16/2810.3.158.17 – 10.3.158.3010.3.158.31
3510.3.158.32/2810.3.158.33 – 10.3.158.4610.3.158.47
3610.3.158.48/2810.3.158.49 – 10.3.158.6210.3.158.63
3710.3.158.64/2810.3.158.65 – 10.3.158.7810.3.158.79
3810.3.158.80/2810.3.158.81 – 10.3.158.9410.3.158.95
3910.3.158.96/2810.3.158.97 – 10.3.158.11010.3.158.111
4010.3.158.112/2810.3.158.113 – 10.3.158.12610.3.158.127
4110.3.158.128/2810.3.158.129 – 10.3.158.14210.3.158.143
4210.3.158.144/2810.3.158.145 – 10.3.158.15810.3.158.159
4310.3.158.160/2810.3.158.161 – 10.3.158.17410.3.158.175
4410.3.158.176/2810.3.158.177 – 10.3.158.19010.3.158.191
4510.3.158.192/2810.3.158.193 – 10.3.158.20610.3.158.207
4610.3.158.208/2810.3.158.209 – 10.3.158.22210.3.158.223
4710.3.158.224/2810.3.158.225 – 10.3.158.23810.3.158.239
4810.3.158.240/2810.3.158.241 – 10.3.158.25410.3.158.255
4910.3.159.0/2810.3.159.1 – 10.3.159.1410.3.159.15
5010.3.159.16/2810.3.159.17 – 10.3.159.3010.3.159.31
5110.3.159.32/2810.3.159.33 – 10.3.159.4610.3.159.47
5210.3.159.48/2810.3.159.49 – 10.3.159.6210.3.159.63
5310.3.159.64/2810.3.159.65 – 10.3.159.7810.3.159.79
5410.3.159.80/2810.3.159.81 – 10.3.159.9410.3.159.95
5510.3.159.96/2810.3.159.97 – 10.3.159.11010.3.159.111
5610.3.159.112/2810.3.159.113 – 10.3.159.12610.3.159.127
5710.3.159.128/2810.3.159.129 – 10.3.159.14210.3.159.143
5810.3.159.144/2810.3.159.145 – 10.3.159.15810.3.159.159
5910.3.159.160/2810.3.159.161 – 10.3.159.17410.3.159.175
6010.3.159.176/2810.3.159.177 – 10.3.159.19010.3.159.191
6110.3.159.192/2810.3.159.193 – 10.3.159.20610.3.159.207
6210.3.159.208/2810.3.159.209 – 10.3.159.22210.3.159.223
6310.3.159.224/2810.3.159.225 – 10.3.159.23810.3.159.239
6410.3.159.240/2810.3.159.241 – 10.3.159.25410.3.159.255
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 →