ip
ipku.in

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)10.167.132.0/23
network10.167.132.0/23
broadcast10.167.133.255
first host10.167.132.1
last host10.167.133.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.132.0/23
address00001010.10100111.10000100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.10000100.00000000
broadcast00001010.10100111.10000101.11111111
green = network part, grey = host part
hex0x0aa78400
decimal178750464
reverse dns0.132.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:8400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.132.0/2910.167.132.1 – 10.167.132.610.167.132.7
210.167.132.8/2910.167.132.9 – 10.167.132.1410.167.132.15
310.167.132.16/2910.167.132.17 – 10.167.132.2210.167.132.23
410.167.132.24/2910.167.132.25 – 10.167.132.3010.167.132.31
510.167.132.32/2910.167.132.33 – 10.167.132.3810.167.132.39
610.167.132.40/2910.167.132.41 – 10.167.132.4610.167.132.47
710.167.132.48/2910.167.132.49 – 10.167.132.5410.167.132.55
810.167.132.56/2910.167.132.57 – 10.167.132.6210.167.132.63
910.167.132.64/2910.167.132.65 – 10.167.132.7010.167.132.71
1010.167.132.72/2910.167.132.73 – 10.167.132.7810.167.132.79
1110.167.132.80/2910.167.132.81 – 10.167.132.8610.167.132.87
1210.167.132.88/2910.167.132.89 – 10.167.132.9410.167.132.95
1310.167.132.96/2910.167.132.97 – 10.167.132.10210.167.132.103
1410.167.132.104/2910.167.132.105 – 10.167.132.11010.167.132.111
1510.167.132.112/2910.167.132.113 – 10.167.132.11810.167.132.119
1610.167.132.120/2910.167.132.121 – 10.167.132.12610.167.132.127
1710.167.132.128/2910.167.132.129 – 10.167.132.13410.167.132.135
1810.167.132.136/2910.167.132.137 – 10.167.132.14210.167.132.143
1910.167.132.144/2910.167.132.145 – 10.167.132.15010.167.132.151
2010.167.132.152/2910.167.132.153 – 10.167.132.15810.167.132.159
2110.167.132.160/2910.167.132.161 – 10.167.132.16610.167.132.167
2210.167.132.168/2910.167.132.169 – 10.167.132.17410.167.132.175
2310.167.132.176/2910.167.132.177 – 10.167.132.18210.167.132.183
2410.167.132.184/2910.167.132.185 – 10.167.132.19010.167.132.191
2510.167.132.192/2910.167.132.193 – 10.167.132.19810.167.132.199
2610.167.132.200/2910.167.132.201 – 10.167.132.20610.167.132.207
2710.167.132.208/2910.167.132.209 – 10.167.132.21410.167.132.215
2810.167.132.216/2910.167.132.217 – 10.167.132.22210.167.132.223
2910.167.132.224/2910.167.132.225 – 10.167.132.23010.167.132.231
3010.167.132.232/2910.167.132.233 – 10.167.132.23810.167.132.239
3110.167.132.240/2910.167.132.241 – 10.167.132.24610.167.132.247
3210.167.132.248/2910.167.132.249 – 10.167.132.25410.167.132.255
3310.167.133.0/2910.167.133.1 – 10.167.133.610.167.133.7
3410.167.133.8/2910.167.133.9 – 10.167.133.1410.167.133.15
3510.167.133.16/2910.167.133.17 – 10.167.133.2210.167.133.23
3610.167.133.24/2910.167.133.25 – 10.167.133.3010.167.133.31
3710.167.133.32/2910.167.133.33 – 10.167.133.3810.167.133.39
3810.167.133.40/2910.167.133.41 – 10.167.133.4610.167.133.47
3910.167.133.48/2910.167.133.49 – 10.167.133.5410.167.133.55
4010.167.133.56/2910.167.133.57 – 10.167.133.6210.167.133.63
4110.167.133.64/2910.167.133.65 – 10.167.133.7010.167.133.71
4210.167.133.72/2910.167.133.73 – 10.167.133.7810.167.133.79
4310.167.133.80/2910.167.133.81 – 10.167.133.8610.167.133.87
4410.167.133.88/2910.167.133.89 – 10.167.133.9410.167.133.95
4510.167.133.96/2910.167.133.97 – 10.167.133.10210.167.133.103
4610.167.133.104/2910.167.133.105 – 10.167.133.11010.167.133.111
4710.167.133.112/2910.167.133.113 – 10.167.133.11810.167.133.119
4810.167.133.120/2910.167.133.121 – 10.167.133.12610.167.133.127
4910.167.133.128/2910.167.133.129 – 10.167.133.13410.167.133.135
5010.167.133.136/2910.167.133.137 – 10.167.133.14210.167.133.143
5110.167.133.144/2910.167.133.145 – 10.167.133.15010.167.133.151
5210.167.133.152/2910.167.133.153 – 10.167.133.15810.167.133.159
5310.167.133.160/2910.167.133.161 – 10.167.133.16610.167.133.167
5410.167.133.168/2910.167.133.169 – 10.167.133.17410.167.133.175
5510.167.133.176/2910.167.133.177 – 10.167.133.18210.167.133.183
5610.167.133.184/2910.167.133.185 – 10.167.133.19010.167.133.191
5710.167.133.192/2910.167.133.193 – 10.167.133.19810.167.133.199
5810.167.133.200/2910.167.133.201 – 10.167.133.20610.167.133.207
5910.167.133.208/2910.167.133.209 – 10.167.133.21410.167.133.215
6010.167.133.216/2910.167.133.217 – 10.167.133.22210.167.133.223
6110.167.133.224/2910.167.133.225 – 10.167.133.23010.167.133.231
6210.167.133.232/2910.167.133.233 – 10.167.133.23810.167.133.239
6310.167.133.240/2910.167.133.241 – 10.167.133.24610.167.133.247
6410.167.133.248/2910.167.133.249 – 10.167.133.25410.167.133.255
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 →