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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)10.167.94.0/23
network10.167.94.0/23
broadcast10.167.95.255
first host10.167.94.1
last host10.167.95.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.94.0/23
address00001010.10100111.01011110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.01011110.00000000
broadcast00001010.10100111.01011111.11111111
green = network part, grey = host part
hex0x0aa75e00
decimal178740736
reverse dns0.94.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:5e00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.94.0/2910.167.94.1 – 10.167.94.610.167.94.7
210.167.94.8/2910.167.94.9 – 10.167.94.1410.167.94.15
310.167.94.16/2910.167.94.17 – 10.167.94.2210.167.94.23
410.167.94.24/2910.167.94.25 – 10.167.94.3010.167.94.31
510.167.94.32/2910.167.94.33 – 10.167.94.3810.167.94.39
610.167.94.40/2910.167.94.41 – 10.167.94.4610.167.94.47
710.167.94.48/2910.167.94.49 – 10.167.94.5410.167.94.55
810.167.94.56/2910.167.94.57 – 10.167.94.6210.167.94.63
910.167.94.64/2910.167.94.65 – 10.167.94.7010.167.94.71
1010.167.94.72/2910.167.94.73 – 10.167.94.7810.167.94.79
1110.167.94.80/2910.167.94.81 – 10.167.94.8610.167.94.87
1210.167.94.88/2910.167.94.89 – 10.167.94.9410.167.94.95
1310.167.94.96/2910.167.94.97 – 10.167.94.10210.167.94.103
1410.167.94.104/2910.167.94.105 – 10.167.94.11010.167.94.111
1510.167.94.112/2910.167.94.113 – 10.167.94.11810.167.94.119
1610.167.94.120/2910.167.94.121 – 10.167.94.12610.167.94.127
1710.167.94.128/2910.167.94.129 – 10.167.94.13410.167.94.135
1810.167.94.136/2910.167.94.137 – 10.167.94.14210.167.94.143
1910.167.94.144/2910.167.94.145 – 10.167.94.15010.167.94.151
2010.167.94.152/2910.167.94.153 – 10.167.94.15810.167.94.159
2110.167.94.160/2910.167.94.161 – 10.167.94.16610.167.94.167
2210.167.94.168/2910.167.94.169 – 10.167.94.17410.167.94.175
2310.167.94.176/2910.167.94.177 – 10.167.94.18210.167.94.183
2410.167.94.184/2910.167.94.185 – 10.167.94.19010.167.94.191
2510.167.94.192/2910.167.94.193 – 10.167.94.19810.167.94.199
2610.167.94.200/2910.167.94.201 – 10.167.94.20610.167.94.207
2710.167.94.208/2910.167.94.209 – 10.167.94.21410.167.94.215
2810.167.94.216/2910.167.94.217 – 10.167.94.22210.167.94.223
2910.167.94.224/2910.167.94.225 – 10.167.94.23010.167.94.231
3010.167.94.232/2910.167.94.233 – 10.167.94.23810.167.94.239
3110.167.94.240/2910.167.94.241 – 10.167.94.24610.167.94.247
3210.167.94.248/2910.167.94.249 – 10.167.94.25410.167.94.255
3310.167.95.0/2910.167.95.1 – 10.167.95.610.167.95.7
3410.167.95.8/2910.167.95.9 – 10.167.95.1410.167.95.15
3510.167.95.16/2910.167.95.17 – 10.167.95.2210.167.95.23
3610.167.95.24/2910.167.95.25 – 10.167.95.3010.167.95.31
3710.167.95.32/2910.167.95.33 – 10.167.95.3810.167.95.39
3810.167.95.40/2910.167.95.41 – 10.167.95.4610.167.95.47
3910.167.95.48/2910.167.95.49 – 10.167.95.5410.167.95.55
4010.167.95.56/2910.167.95.57 – 10.167.95.6210.167.95.63
4110.167.95.64/2910.167.95.65 – 10.167.95.7010.167.95.71
4210.167.95.72/2910.167.95.73 – 10.167.95.7810.167.95.79
4310.167.95.80/2910.167.95.81 – 10.167.95.8610.167.95.87
4410.167.95.88/2910.167.95.89 – 10.167.95.9410.167.95.95
4510.167.95.96/2910.167.95.97 – 10.167.95.10210.167.95.103
4610.167.95.104/2910.167.95.105 – 10.167.95.11010.167.95.111
4710.167.95.112/2910.167.95.113 – 10.167.95.11810.167.95.119
4810.167.95.120/2910.167.95.121 – 10.167.95.12610.167.95.127
4910.167.95.128/2910.167.95.129 – 10.167.95.13410.167.95.135
5010.167.95.136/2910.167.95.137 – 10.167.95.14210.167.95.143
5110.167.95.144/2910.167.95.145 – 10.167.95.15010.167.95.151
5210.167.95.152/2910.167.95.153 – 10.167.95.15810.167.95.159
5310.167.95.160/2910.167.95.161 – 10.167.95.16610.167.95.167
5410.167.95.168/2910.167.95.169 – 10.167.95.17410.167.95.175
5510.167.95.176/2910.167.95.177 – 10.167.95.18210.167.95.183
5610.167.95.184/2910.167.95.185 – 10.167.95.19010.167.95.191
5710.167.95.192/2910.167.95.193 – 10.167.95.19810.167.95.199
5810.167.95.200/2910.167.95.201 – 10.167.95.20610.167.95.207
5910.167.95.208/2910.167.95.209 – 10.167.95.21410.167.95.215
6010.167.95.216/2910.167.95.217 – 10.167.95.22210.167.95.223
6110.167.95.224/2910.167.95.225 – 10.167.95.23010.167.95.231
6210.167.95.232/2910.167.95.233 – 10.167.95.23810.167.95.239
6310.167.95.240/2910.167.95.241 – 10.167.95.24610.167.95.247
6410.167.95.248/2910.167.95.249 – 10.167.95.25410.167.95.255
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 →