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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)10.167.163.0/24
network10.167.163.0/24
broadcast10.167.163.255
first host10.167.163.1
last host10.167.163.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.167.163.0/24
address00001010.10100111.10100011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10100111.10100011.00000000
broadcast00001010.10100111.10100011.11111111
green = network part, grey = host part
hex0x0aa7a300
decimal178758400
reverse dns0.163.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:a300

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.163.0/3010.167.163.1 – 10.167.163.210.167.163.3
210.167.163.4/3010.167.163.5 – 10.167.163.610.167.163.7
310.167.163.8/3010.167.163.9 – 10.167.163.1010.167.163.11
410.167.163.12/3010.167.163.13 – 10.167.163.1410.167.163.15
510.167.163.16/3010.167.163.17 – 10.167.163.1810.167.163.19
610.167.163.20/3010.167.163.21 – 10.167.163.2210.167.163.23
710.167.163.24/3010.167.163.25 – 10.167.163.2610.167.163.27
810.167.163.28/3010.167.163.29 – 10.167.163.3010.167.163.31
910.167.163.32/3010.167.163.33 – 10.167.163.3410.167.163.35
1010.167.163.36/3010.167.163.37 – 10.167.163.3810.167.163.39
1110.167.163.40/3010.167.163.41 – 10.167.163.4210.167.163.43
1210.167.163.44/3010.167.163.45 – 10.167.163.4610.167.163.47
1310.167.163.48/3010.167.163.49 – 10.167.163.5010.167.163.51
1410.167.163.52/3010.167.163.53 – 10.167.163.5410.167.163.55
1510.167.163.56/3010.167.163.57 – 10.167.163.5810.167.163.59
1610.167.163.60/3010.167.163.61 – 10.167.163.6210.167.163.63
1710.167.163.64/3010.167.163.65 – 10.167.163.6610.167.163.67
1810.167.163.68/3010.167.163.69 – 10.167.163.7010.167.163.71
1910.167.163.72/3010.167.163.73 – 10.167.163.7410.167.163.75
2010.167.163.76/3010.167.163.77 – 10.167.163.7810.167.163.79
2110.167.163.80/3010.167.163.81 – 10.167.163.8210.167.163.83
2210.167.163.84/3010.167.163.85 – 10.167.163.8610.167.163.87
2310.167.163.88/3010.167.163.89 – 10.167.163.9010.167.163.91
2410.167.163.92/3010.167.163.93 – 10.167.163.9410.167.163.95
2510.167.163.96/3010.167.163.97 – 10.167.163.9810.167.163.99
2610.167.163.100/3010.167.163.101 – 10.167.163.10210.167.163.103
2710.167.163.104/3010.167.163.105 – 10.167.163.10610.167.163.107
2810.167.163.108/3010.167.163.109 – 10.167.163.11010.167.163.111
2910.167.163.112/3010.167.163.113 – 10.167.163.11410.167.163.115
3010.167.163.116/3010.167.163.117 – 10.167.163.11810.167.163.119
3110.167.163.120/3010.167.163.121 – 10.167.163.12210.167.163.123
3210.167.163.124/3010.167.163.125 – 10.167.163.12610.167.163.127
3310.167.163.128/3010.167.163.129 – 10.167.163.13010.167.163.131
3410.167.163.132/3010.167.163.133 – 10.167.163.13410.167.163.135
3510.167.163.136/3010.167.163.137 – 10.167.163.13810.167.163.139
3610.167.163.140/3010.167.163.141 – 10.167.163.14210.167.163.143
3710.167.163.144/3010.167.163.145 – 10.167.163.14610.167.163.147
3810.167.163.148/3010.167.163.149 – 10.167.163.15010.167.163.151
3910.167.163.152/3010.167.163.153 – 10.167.163.15410.167.163.155
4010.167.163.156/3010.167.163.157 – 10.167.163.15810.167.163.159
4110.167.163.160/3010.167.163.161 – 10.167.163.16210.167.163.163
4210.167.163.164/3010.167.163.165 – 10.167.163.16610.167.163.167
4310.167.163.168/3010.167.163.169 – 10.167.163.17010.167.163.171
4410.167.163.172/3010.167.163.173 – 10.167.163.17410.167.163.175
4510.167.163.176/3010.167.163.177 – 10.167.163.17810.167.163.179
4610.167.163.180/3010.167.163.181 – 10.167.163.18210.167.163.183
4710.167.163.184/3010.167.163.185 – 10.167.163.18610.167.163.187
4810.167.163.188/3010.167.163.189 – 10.167.163.19010.167.163.191
4910.167.163.192/3010.167.163.193 – 10.167.163.19410.167.163.195
5010.167.163.196/3010.167.163.197 – 10.167.163.19810.167.163.199
5110.167.163.200/3010.167.163.201 – 10.167.163.20210.167.163.203
5210.167.163.204/3010.167.163.205 – 10.167.163.20610.167.163.207
5310.167.163.208/3010.167.163.209 – 10.167.163.21010.167.163.211
5410.167.163.212/3010.167.163.213 – 10.167.163.21410.167.163.215
5510.167.163.216/3010.167.163.217 – 10.167.163.21810.167.163.219
5610.167.163.220/3010.167.163.221 – 10.167.163.22210.167.163.223
5710.167.163.224/3010.167.163.225 – 10.167.163.22610.167.163.227
5810.167.163.228/3010.167.163.229 – 10.167.163.23010.167.163.231
5910.167.163.232/3010.167.163.233 – 10.167.163.23410.167.163.235
6010.167.163.236/3010.167.163.237 – 10.167.163.23810.167.163.239
6110.167.163.240/3010.167.163.241 – 10.167.163.24210.167.163.243
6210.167.163.244/3010.167.163.245 – 10.167.163.24610.167.163.247
6310.167.163.248/3010.167.163.249 – 10.167.163.25010.167.163.251
6410.167.163.252/3010.167.163.253 – 10.167.163.25410.167.163.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /24
/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-
/23255.255.254.0512510-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →