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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)10.0.22.0/23
network10.0.22.0/23
broadcast10.0.23.255
first host10.0.22.1
last host10.0.23.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.0.22.0/23
address00001010.00000000.00010110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000000.00010110.00000000
broadcast00001010.00000000.00010111.11111111
green = network part, grey = host part
hex0x0a001600
decimal167777792
reverse dns0.22.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:1600

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.22.0/2910.0.22.1 – 10.0.22.610.0.22.7
210.0.22.8/2910.0.22.9 – 10.0.22.1410.0.22.15
310.0.22.16/2910.0.22.17 – 10.0.22.2210.0.22.23
410.0.22.24/2910.0.22.25 – 10.0.22.3010.0.22.31
510.0.22.32/2910.0.22.33 – 10.0.22.3810.0.22.39
610.0.22.40/2910.0.22.41 – 10.0.22.4610.0.22.47
710.0.22.48/2910.0.22.49 – 10.0.22.5410.0.22.55
810.0.22.56/2910.0.22.57 – 10.0.22.6210.0.22.63
910.0.22.64/2910.0.22.65 – 10.0.22.7010.0.22.71
1010.0.22.72/2910.0.22.73 – 10.0.22.7810.0.22.79
1110.0.22.80/2910.0.22.81 – 10.0.22.8610.0.22.87
1210.0.22.88/2910.0.22.89 – 10.0.22.9410.0.22.95
1310.0.22.96/2910.0.22.97 – 10.0.22.10210.0.22.103
1410.0.22.104/2910.0.22.105 – 10.0.22.11010.0.22.111
1510.0.22.112/2910.0.22.113 – 10.0.22.11810.0.22.119
1610.0.22.120/2910.0.22.121 – 10.0.22.12610.0.22.127
1710.0.22.128/2910.0.22.129 – 10.0.22.13410.0.22.135
1810.0.22.136/2910.0.22.137 – 10.0.22.14210.0.22.143
1910.0.22.144/2910.0.22.145 – 10.0.22.15010.0.22.151
2010.0.22.152/2910.0.22.153 – 10.0.22.15810.0.22.159
2110.0.22.160/2910.0.22.161 – 10.0.22.16610.0.22.167
2210.0.22.168/2910.0.22.169 – 10.0.22.17410.0.22.175
2310.0.22.176/2910.0.22.177 – 10.0.22.18210.0.22.183
2410.0.22.184/2910.0.22.185 – 10.0.22.19010.0.22.191
2510.0.22.192/2910.0.22.193 – 10.0.22.19810.0.22.199
2610.0.22.200/2910.0.22.201 – 10.0.22.20610.0.22.207
2710.0.22.208/2910.0.22.209 – 10.0.22.21410.0.22.215
2810.0.22.216/2910.0.22.217 – 10.0.22.22210.0.22.223
2910.0.22.224/2910.0.22.225 – 10.0.22.23010.0.22.231
3010.0.22.232/2910.0.22.233 – 10.0.22.23810.0.22.239
3110.0.22.240/2910.0.22.241 – 10.0.22.24610.0.22.247
3210.0.22.248/2910.0.22.249 – 10.0.22.25410.0.22.255
3310.0.23.0/2910.0.23.1 – 10.0.23.610.0.23.7
3410.0.23.8/2910.0.23.9 – 10.0.23.1410.0.23.15
3510.0.23.16/2910.0.23.17 – 10.0.23.2210.0.23.23
3610.0.23.24/2910.0.23.25 – 10.0.23.3010.0.23.31
3710.0.23.32/2910.0.23.33 – 10.0.23.3810.0.23.39
3810.0.23.40/2910.0.23.41 – 10.0.23.4610.0.23.47
3910.0.23.48/2910.0.23.49 – 10.0.23.5410.0.23.55
4010.0.23.56/2910.0.23.57 – 10.0.23.6210.0.23.63
4110.0.23.64/2910.0.23.65 – 10.0.23.7010.0.23.71
4210.0.23.72/2910.0.23.73 – 10.0.23.7810.0.23.79
4310.0.23.80/2910.0.23.81 – 10.0.23.8610.0.23.87
4410.0.23.88/2910.0.23.89 – 10.0.23.9410.0.23.95
4510.0.23.96/2910.0.23.97 – 10.0.23.10210.0.23.103
4610.0.23.104/2910.0.23.105 – 10.0.23.11010.0.23.111
4710.0.23.112/2910.0.23.113 – 10.0.23.11810.0.23.119
4810.0.23.120/2910.0.23.121 – 10.0.23.12610.0.23.127
4910.0.23.128/2910.0.23.129 – 10.0.23.13410.0.23.135
5010.0.23.136/2910.0.23.137 – 10.0.23.14210.0.23.143
5110.0.23.144/2910.0.23.145 – 10.0.23.15010.0.23.151
5210.0.23.152/2910.0.23.153 – 10.0.23.15810.0.23.159
5310.0.23.160/2910.0.23.161 – 10.0.23.16610.0.23.167
5410.0.23.168/2910.0.23.169 – 10.0.23.17410.0.23.175
5510.0.23.176/2910.0.23.177 – 10.0.23.18210.0.23.183
5610.0.23.184/2910.0.23.185 – 10.0.23.19010.0.23.191
5710.0.23.192/2910.0.23.193 – 10.0.23.19810.0.23.199
5810.0.23.200/2910.0.23.201 – 10.0.23.20610.0.23.207
5910.0.23.208/2910.0.23.209 – 10.0.23.21410.0.23.215
6010.0.23.216/2910.0.23.217 – 10.0.23.22210.0.23.223
6110.0.23.224/2910.0.23.225 – 10.0.23.23010.0.23.231
6210.0.23.232/2910.0.23.233 – 10.0.23.23810.0.23.239
6310.0.23.240/2910.0.23.241 – 10.0.23.24610.0.23.247
6410.0.23.248/2910.0.23.249 – 10.0.23.25410.0.23.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /23
/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-
/22255.255.252.01,0241,022-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →