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)10.167.86.0/23
network10.167.86.0/23
broadcast10.167.87.255
first host10.167.86.1
last host10.167.87.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.86.0/23
address00001010.10100111.01010110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.01010110.00000000
broadcast00001010.10100111.01010111.11111111
green = network part, grey = host part
hex0x0aa75600
decimal178738688
reverse dns0.86.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:5600

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.86.0/2910.167.86.1 – 10.167.86.610.167.86.7
210.167.86.8/2910.167.86.9 – 10.167.86.1410.167.86.15
310.167.86.16/2910.167.86.17 – 10.167.86.2210.167.86.23
410.167.86.24/2910.167.86.25 – 10.167.86.3010.167.86.31
510.167.86.32/2910.167.86.33 – 10.167.86.3810.167.86.39
610.167.86.40/2910.167.86.41 – 10.167.86.4610.167.86.47
710.167.86.48/2910.167.86.49 – 10.167.86.5410.167.86.55
810.167.86.56/2910.167.86.57 – 10.167.86.6210.167.86.63
910.167.86.64/2910.167.86.65 – 10.167.86.7010.167.86.71
1010.167.86.72/2910.167.86.73 – 10.167.86.7810.167.86.79
1110.167.86.80/2910.167.86.81 – 10.167.86.8610.167.86.87
1210.167.86.88/2910.167.86.89 – 10.167.86.9410.167.86.95
1310.167.86.96/2910.167.86.97 – 10.167.86.10210.167.86.103
1410.167.86.104/2910.167.86.105 – 10.167.86.11010.167.86.111
1510.167.86.112/2910.167.86.113 – 10.167.86.11810.167.86.119
1610.167.86.120/2910.167.86.121 – 10.167.86.12610.167.86.127
1710.167.86.128/2910.167.86.129 – 10.167.86.13410.167.86.135
1810.167.86.136/2910.167.86.137 – 10.167.86.14210.167.86.143
1910.167.86.144/2910.167.86.145 – 10.167.86.15010.167.86.151
2010.167.86.152/2910.167.86.153 – 10.167.86.15810.167.86.159
2110.167.86.160/2910.167.86.161 – 10.167.86.16610.167.86.167
2210.167.86.168/2910.167.86.169 – 10.167.86.17410.167.86.175
2310.167.86.176/2910.167.86.177 – 10.167.86.18210.167.86.183
2410.167.86.184/2910.167.86.185 – 10.167.86.19010.167.86.191
2510.167.86.192/2910.167.86.193 – 10.167.86.19810.167.86.199
2610.167.86.200/2910.167.86.201 – 10.167.86.20610.167.86.207
2710.167.86.208/2910.167.86.209 – 10.167.86.21410.167.86.215
2810.167.86.216/2910.167.86.217 – 10.167.86.22210.167.86.223
2910.167.86.224/2910.167.86.225 – 10.167.86.23010.167.86.231
3010.167.86.232/2910.167.86.233 – 10.167.86.23810.167.86.239
3110.167.86.240/2910.167.86.241 – 10.167.86.24610.167.86.247
3210.167.86.248/2910.167.86.249 – 10.167.86.25410.167.86.255
3310.167.87.0/2910.167.87.1 – 10.167.87.610.167.87.7
3410.167.87.8/2910.167.87.9 – 10.167.87.1410.167.87.15
3510.167.87.16/2910.167.87.17 – 10.167.87.2210.167.87.23
3610.167.87.24/2910.167.87.25 – 10.167.87.3010.167.87.31
3710.167.87.32/2910.167.87.33 – 10.167.87.3810.167.87.39
3810.167.87.40/2910.167.87.41 – 10.167.87.4610.167.87.47
3910.167.87.48/2910.167.87.49 – 10.167.87.5410.167.87.55
4010.167.87.56/2910.167.87.57 – 10.167.87.6210.167.87.63
4110.167.87.64/2910.167.87.65 – 10.167.87.7010.167.87.71
4210.167.87.72/2910.167.87.73 – 10.167.87.7810.167.87.79
4310.167.87.80/2910.167.87.81 – 10.167.87.8610.167.87.87
4410.167.87.88/2910.167.87.89 – 10.167.87.9410.167.87.95
4510.167.87.96/2910.167.87.97 – 10.167.87.10210.167.87.103
4610.167.87.104/2910.167.87.105 – 10.167.87.11010.167.87.111
4710.167.87.112/2910.167.87.113 – 10.167.87.11810.167.87.119
4810.167.87.120/2910.167.87.121 – 10.167.87.12610.167.87.127
4910.167.87.128/2910.167.87.129 – 10.167.87.13410.167.87.135
5010.167.87.136/2910.167.87.137 – 10.167.87.14210.167.87.143
5110.167.87.144/2910.167.87.145 – 10.167.87.15010.167.87.151
5210.167.87.152/2910.167.87.153 – 10.167.87.15810.167.87.159
5310.167.87.160/2910.167.87.161 – 10.167.87.16610.167.87.167
5410.167.87.168/2910.167.87.169 – 10.167.87.17410.167.87.175
5510.167.87.176/2910.167.87.177 – 10.167.87.18210.167.87.183
5610.167.87.184/2910.167.87.185 – 10.167.87.19010.167.87.191
5710.167.87.192/2910.167.87.193 – 10.167.87.19810.167.87.199
5810.167.87.200/2910.167.87.201 – 10.167.87.20610.167.87.207
5910.167.87.208/2910.167.87.209 – 10.167.87.21410.167.87.215
6010.167.87.216/2910.167.87.217 – 10.167.87.22210.167.87.223
6110.167.87.224/2910.167.87.225 – 10.167.87.23010.167.87.231
6210.167.87.232/2910.167.87.233 – 10.167.87.23810.167.87.239
6310.167.87.240/2910.167.87.241 – 10.167.87.24610.167.87.247
6410.167.87.248/2910.167.87.249 – 10.167.87.25410.167.87.255
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 →