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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)10.232.6.0/23
network10.232.6.0/23
broadcast10.232.7.255
first host10.232.6.1
last host10.232.7.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.232.6.0/23
address00001010.11101000.00000110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11101000.00000110.00000000
broadcast00001010.11101000.00000111.11111111
green = network part, grey = host part
hex0x0ae80600
decimal182978048
reverse dns0.6.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:600

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.232.6.0/2910.232.6.1 – 10.232.6.610.232.6.7
210.232.6.8/2910.232.6.9 – 10.232.6.1410.232.6.15
310.232.6.16/2910.232.6.17 – 10.232.6.2210.232.6.23
410.232.6.24/2910.232.6.25 – 10.232.6.3010.232.6.31
510.232.6.32/2910.232.6.33 – 10.232.6.3810.232.6.39
610.232.6.40/2910.232.6.41 – 10.232.6.4610.232.6.47
710.232.6.48/2910.232.6.49 – 10.232.6.5410.232.6.55
810.232.6.56/2910.232.6.57 – 10.232.6.6210.232.6.63
910.232.6.64/2910.232.6.65 – 10.232.6.7010.232.6.71
1010.232.6.72/2910.232.6.73 – 10.232.6.7810.232.6.79
1110.232.6.80/2910.232.6.81 – 10.232.6.8610.232.6.87
1210.232.6.88/2910.232.6.89 – 10.232.6.9410.232.6.95
1310.232.6.96/2910.232.6.97 – 10.232.6.10210.232.6.103
1410.232.6.104/2910.232.6.105 – 10.232.6.11010.232.6.111
1510.232.6.112/2910.232.6.113 – 10.232.6.11810.232.6.119
1610.232.6.120/2910.232.6.121 – 10.232.6.12610.232.6.127
1710.232.6.128/2910.232.6.129 – 10.232.6.13410.232.6.135
1810.232.6.136/2910.232.6.137 – 10.232.6.14210.232.6.143
1910.232.6.144/2910.232.6.145 – 10.232.6.15010.232.6.151
2010.232.6.152/2910.232.6.153 – 10.232.6.15810.232.6.159
2110.232.6.160/2910.232.6.161 – 10.232.6.16610.232.6.167
2210.232.6.168/2910.232.6.169 – 10.232.6.17410.232.6.175
2310.232.6.176/2910.232.6.177 – 10.232.6.18210.232.6.183
2410.232.6.184/2910.232.6.185 – 10.232.6.19010.232.6.191
2510.232.6.192/2910.232.6.193 – 10.232.6.19810.232.6.199
2610.232.6.200/2910.232.6.201 – 10.232.6.20610.232.6.207
2710.232.6.208/2910.232.6.209 – 10.232.6.21410.232.6.215
2810.232.6.216/2910.232.6.217 – 10.232.6.22210.232.6.223
2910.232.6.224/2910.232.6.225 – 10.232.6.23010.232.6.231
3010.232.6.232/2910.232.6.233 – 10.232.6.23810.232.6.239
3110.232.6.240/2910.232.6.241 – 10.232.6.24610.232.6.247
3210.232.6.248/2910.232.6.249 – 10.232.6.25410.232.6.255
3310.232.7.0/2910.232.7.1 – 10.232.7.610.232.7.7
3410.232.7.8/2910.232.7.9 – 10.232.7.1410.232.7.15
3510.232.7.16/2910.232.7.17 – 10.232.7.2210.232.7.23
3610.232.7.24/2910.232.7.25 – 10.232.7.3010.232.7.31
3710.232.7.32/2910.232.7.33 – 10.232.7.3810.232.7.39
3810.232.7.40/2910.232.7.41 – 10.232.7.4610.232.7.47
3910.232.7.48/2910.232.7.49 – 10.232.7.5410.232.7.55
4010.232.7.56/2910.232.7.57 – 10.232.7.6210.232.7.63
4110.232.7.64/2910.232.7.65 – 10.232.7.7010.232.7.71
4210.232.7.72/2910.232.7.73 – 10.232.7.7810.232.7.79
4310.232.7.80/2910.232.7.81 – 10.232.7.8610.232.7.87
4410.232.7.88/2910.232.7.89 – 10.232.7.9410.232.7.95
4510.232.7.96/2910.232.7.97 – 10.232.7.10210.232.7.103
4610.232.7.104/2910.232.7.105 – 10.232.7.11010.232.7.111
4710.232.7.112/2910.232.7.113 – 10.232.7.11810.232.7.119
4810.232.7.120/2910.232.7.121 – 10.232.7.12610.232.7.127
4910.232.7.128/2910.232.7.129 – 10.232.7.13410.232.7.135
5010.232.7.136/2910.232.7.137 – 10.232.7.14210.232.7.143
5110.232.7.144/2910.232.7.145 – 10.232.7.15010.232.7.151
5210.232.7.152/2910.232.7.153 – 10.232.7.15810.232.7.159
5310.232.7.160/2910.232.7.161 – 10.232.7.16610.232.7.167
5410.232.7.168/2910.232.7.169 – 10.232.7.17410.232.7.175
5510.232.7.176/2910.232.7.177 – 10.232.7.18210.232.7.183
5610.232.7.184/2910.232.7.185 – 10.232.7.19010.232.7.191
5710.232.7.192/2910.232.7.193 – 10.232.7.19810.232.7.199
5810.232.7.200/2910.232.7.201 – 10.232.7.20610.232.7.207
5910.232.7.208/2910.232.7.209 – 10.232.7.21410.232.7.215
6010.232.7.216/2910.232.7.217 – 10.232.7.22210.232.7.223
6110.232.7.224/2910.232.7.225 – 10.232.7.23010.232.7.231
6210.232.7.232/2910.232.7.233 – 10.232.7.23810.232.7.239
6310.232.7.240/2910.232.7.241 – 10.232.7.24610.232.7.247
6410.232.7.248/2910.232.7.249 – 10.232.7.25410.232.7.255
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 →