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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)10.167.182.0/23
network10.167.182.0/23
broadcast10.167.183.255
first host10.167.182.1
last host10.167.183.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.182.0/23
address00001010.10100111.10110110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.10110110.00000000
broadcast00001010.10100111.10110111.11111111
green = network part, grey = host part
hex0x0aa7b600
decimal178763264
reverse dns0.182.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:b600

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.182.0/2910.167.182.1 – 10.167.182.610.167.182.7
210.167.182.8/2910.167.182.9 – 10.167.182.1410.167.182.15
310.167.182.16/2910.167.182.17 – 10.167.182.2210.167.182.23
410.167.182.24/2910.167.182.25 – 10.167.182.3010.167.182.31
510.167.182.32/2910.167.182.33 – 10.167.182.3810.167.182.39
610.167.182.40/2910.167.182.41 – 10.167.182.4610.167.182.47
710.167.182.48/2910.167.182.49 – 10.167.182.5410.167.182.55
810.167.182.56/2910.167.182.57 – 10.167.182.6210.167.182.63
910.167.182.64/2910.167.182.65 – 10.167.182.7010.167.182.71
1010.167.182.72/2910.167.182.73 – 10.167.182.7810.167.182.79
1110.167.182.80/2910.167.182.81 – 10.167.182.8610.167.182.87
1210.167.182.88/2910.167.182.89 – 10.167.182.9410.167.182.95
1310.167.182.96/2910.167.182.97 – 10.167.182.10210.167.182.103
1410.167.182.104/2910.167.182.105 – 10.167.182.11010.167.182.111
1510.167.182.112/2910.167.182.113 – 10.167.182.11810.167.182.119
1610.167.182.120/2910.167.182.121 – 10.167.182.12610.167.182.127
1710.167.182.128/2910.167.182.129 – 10.167.182.13410.167.182.135
1810.167.182.136/2910.167.182.137 – 10.167.182.14210.167.182.143
1910.167.182.144/2910.167.182.145 – 10.167.182.15010.167.182.151
2010.167.182.152/2910.167.182.153 – 10.167.182.15810.167.182.159
2110.167.182.160/2910.167.182.161 – 10.167.182.16610.167.182.167
2210.167.182.168/2910.167.182.169 – 10.167.182.17410.167.182.175
2310.167.182.176/2910.167.182.177 – 10.167.182.18210.167.182.183
2410.167.182.184/2910.167.182.185 – 10.167.182.19010.167.182.191
2510.167.182.192/2910.167.182.193 – 10.167.182.19810.167.182.199
2610.167.182.200/2910.167.182.201 – 10.167.182.20610.167.182.207
2710.167.182.208/2910.167.182.209 – 10.167.182.21410.167.182.215
2810.167.182.216/2910.167.182.217 – 10.167.182.22210.167.182.223
2910.167.182.224/2910.167.182.225 – 10.167.182.23010.167.182.231
3010.167.182.232/2910.167.182.233 – 10.167.182.23810.167.182.239
3110.167.182.240/2910.167.182.241 – 10.167.182.24610.167.182.247
3210.167.182.248/2910.167.182.249 – 10.167.182.25410.167.182.255
3310.167.183.0/2910.167.183.1 – 10.167.183.610.167.183.7
3410.167.183.8/2910.167.183.9 – 10.167.183.1410.167.183.15
3510.167.183.16/2910.167.183.17 – 10.167.183.2210.167.183.23
3610.167.183.24/2910.167.183.25 – 10.167.183.3010.167.183.31
3710.167.183.32/2910.167.183.33 – 10.167.183.3810.167.183.39
3810.167.183.40/2910.167.183.41 – 10.167.183.4610.167.183.47
3910.167.183.48/2910.167.183.49 – 10.167.183.5410.167.183.55
4010.167.183.56/2910.167.183.57 – 10.167.183.6210.167.183.63
4110.167.183.64/2910.167.183.65 – 10.167.183.7010.167.183.71
4210.167.183.72/2910.167.183.73 – 10.167.183.7810.167.183.79
4310.167.183.80/2910.167.183.81 – 10.167.183.8610.167.183.87
4410.167.183.88/2910.167.183.89 – 10.167.183.9410.167.183.95
4510.167.183.96/2910.167.183.97 – 10.167.183.10210.167.183.103
4610.167.183.104/2910.167.183.105 – 10.167.183.11010.167.183.111
4710.167.183.112/2910.167.183.113 – 10.167.183.11810.167.183.119
4810.167.183.120/2910.167.183.121 – 10.167.183.12610.167.183.127
4910.167.183.128/2910.167.183.129 – 10.167.183.13410.167.183.135
5010.167.183.136/2910.167.183.137 – 10.167.183.14210.167.183.143
5110.167.183.144/2910.167.183.145 – 10.167.183.15010.167.183.151
5210.167.183.152/2910.167.183.153 – 10.167.183.15810.167.183.159
5310.167.183.160/2910.167.183.161 – 10.167.183.16610.167.183.167
5410.167.183.168/2910.167.183.169 – 10.167.183.17410.167.183.175
5510.167.183.176/2910.167.183.177 – 10.167.183.18210.167.183.183
5610.167.183.184/2910.167.183.185 – 10.167.183.19010.167.183.191
5710.167.183.192/2910.167.183.193 – 10.167.183.19810.167.183.199
5810.167.183.200/2910.167.183.201 – 10.167.183.20610.167.183.207
5910.167.183.208/2910.167.183.209 – 10.167.183.21410.167.183.215
6010.167.183.216/2910.167.183.217 – 10.167.183.22210.167.183.223
6110.167.183.224/2910.167.183.225 – 10.167.183.23010.167.183.231
6210.167.183.232/2910.167.183.233 – 10.167.183.23810.167.183.239
6310.167.183.240/2910.167.183.241 – 10.167.183.24610.167.183.247
6410.167.183.248/2910.167.183.249 – 10.167.183.25410.167.183.255
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 →