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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)10.2.172.0/22
network10.2.172.0/22
broadcast10.2.175.255
first host10.2.172.1
last host10.2.175.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.2.172.0/22
address00001010.00000010.10101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000010.10101100.00000000
broadcast00001010.00000010.10101111.11111111
green = network part, grey = host part
hex0x0a02ac00
decimal167947264
reverse dns0.172.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:ac00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.172.0/2810.2.172.1 – 10.2.172.1410.2.172.15
210.2.172.16/2810.2.172.17 – 10.2.172.3010.2.172.31
310.2.172.32/2810.2.172.33 – 10.2.172.4610.2.172.47
410.2.172.48/2810.2.172.49 – 10.2.172.6210.2.172.63
510.2.172.64/2810.2.172.65 – 10.2.172.7810.2.172.79
610.2.172.80/2810.2.172.81 – 10.2.172.9410.2.172.95
710.2.172.96/2810.2.172.97 – 10.2.172.11010.2.172.111
810.2.172.112/2810.2.172.113 – 10.2.172.12610.2.172.127
910.2.172.128/2810.2.172.129 – 10.2.172.14210.2.172.143
1010.2.172.144/2810.2.172.145 – 10.2.172.15810.2.172.159
1110.2.172.160/2810.2.172.161 – 10.2.172.17410.2.172.175
1210.2.172.176/2810.2.172.177 – 10.2.172.19010.2.172.191
1310.2.172.192/2810.2.172.193 – 10.2.172.20610.2.172.207
1410.2.172.208/2810.2.172.209 – 10.2.172.22210.2.172.223
1510.2.172.224/2810.2.172.225 – 10.2.172.23810.2.172.239
1610.2.172.240/2810.2.172.241 – 10.2.172.25410.2.172.255
1710.2.173.0/2810.2.173.1 – 10.2.173.1410.2.173.15
1810.2.173.16/2810.2.173.17 – 10.2.173.3010.2.173.31
1910.2.173.32/2810.2.173.33 – 10.2.173.4610.2.173.47
2010.2.173.48/2810.2.173.49 – 10.2.173.6210.2.173.63
2110.2.173.64/2810.2.173.65 – 10.2.173.7810.2.173.79
2210.2.173.80/2810.2.173.81 – 10.2.173.9410.2.173.95
2310.2.173.96/2810.2.173.97 – 10.2.173.11010.2.173.111
2410.2.173.112/2810.2.173.113 – 10.2.173.12610.2.173.127
2510.2.173.128/2810.2.173.129 – 10.2.173.14210.2.173.143
2610.2.173.144/2810.2.173.145 – 10.2.173.15810.2.173.159
2710.2.173.160/2810.2.173.161 – 10.2.173.17410.2.173.175
2810.2.173.176/2810.2.173.177 – 10.2.173.19010.2.173.191
2910.2.173.192/2810.2.173.193 – 10.2.173.20610.2.173.207
3010.2.173.208/2810.2.173.209 – 10.2.173.22210.2.173.223
3110.2.173.224/2810.2.173.225 – 10.2.173.23810.2.173.239
3210.2.173.240/2810.2.173.241 – 10.2.173.25410.2.173.255
3310.2.174.0/2810.2.174.1 – 10.2.174.1410.2.174.15
3410.2.174.16/2810.2.174.17 – 10.2.174.3010.2.174.31
3510.2.174.32/2810.2.174.33 – 10.2.174.4610.2.174.47
3610.2.174.48/2810.2.174.49 – 10.2.174.6210.2.174.63
3710.2.174.64/2810.2.174.65 – 10.2.174.7810.2.174.79
3810.2.174.80/2810.2.174.81 – 10.2.174.9410.2.174.95
3910.2.174.96/2810.2.174.97 – 10.2.174.11010.2.174.111
4010.2.174.112/2810.2.174.113 – 10.2.174.12610.2.174.127
4110.2.174.128/2810.2.174.129 – 10.2.174.14210.2.174.143
4210.2.174.144/2810.2.174.145 – 10.2.174.15810.2.174.159
4310.2.174.160/2810.2.174.161 – 10.2.174.17410.2.174.175
4410.2.174.176/2810.2.174.177 – 10.2.174.19010.2.174.191
4510.2.174.192/2810.2.174.193 – 10.2.174.20610.2.174.207
4610.2.174.208/2810.2.174.209 – 10.2.174.22210.2.174.223
4710.2.174.224/2810.2.174.225 – 10.2.174.23810.2.174.239
4810.2.174.240/2810.2.174.241 – 10.2.174.25410.2.174.255
4910.2.175.0/2810.2.175.1 – 10.2.175.1410.2.175.15
5010.2.175.16/2810.2.175.17 – 10.2.175.3010.2.175.31
5110.2.175.32/2810.2.175.33 – 10.2.175.4610.2.175.47
5210.2.175.48/2810.2.175.49 – 10.2.175.6210.2.175.63
5310.2.175.64/2810.2.175.65 – 10.2.175.7810.2.175.79
5410.2.175.80/2810.2.175.81 – 10.2.175.9410.2.175.95
5510.2.175.96/2810.2.175.97 – 10.2.175.11010.2.175.111
5610.2.175.112/2810.2.175.113 – 10.2.175.12610.2.175.127
5710.2.175.128/2810.2.175.129 – 10.2.175.14210.2.175.143
5810.2.175.144/2810.2.175.145 – 10.2.175.15810.2.175.159
5910.2.175.160/2810.2.175.161 – 10.2.175.17410.2.175.175
6010.2.175.176/2810.2.175.177 – 10.2.175.19010.2.175.191
6110.2.175.192/2810.2.175.193 – 10.2.175.20610.2.175.207
6210.2.175.208/2810.2.175.209 – 10.2.175.22210.2.175.223
6310.2.175.224/2810.2.175.225 – 10.2.175.23810.2.175.239
6410.2.175.240/2810.2.175.241 – 10.2.175.25410.2.175.255
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 →