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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)10.167.68.0/24
network10.167.68.0/24
broadcast10.167.68.255
first host10.167.68.1
last host10.167.68.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.167.68.0/24
address00001010.10100111.01000100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10100111.01000100.00000000
broadcast00001010.10100111.01000100.11111111
green = network part, grey = host part
hex0x0aa74400
decimal178734080
reverse dns0.68.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:4400

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.68.0/3010.167.68.1 – 10.167.68.210.167.68.3
210.167.68.4/3010.167.68.5 – 10.167.68.610.167.68.7
310.167.68.8/3010.167.68.9 – 10.167.68.1010.167.68.11
410.167.68.12/3010.167.68.13 – 10.167.68.1410.167.68.15
510.167.68.16/3010.167.68.17 – 10.167.68.1810.167.68.19
610.167.68.20/3010.167.68.21 – 10.167.68.2210.167.68.23
710.167.68.24/3010.167.68.25 – 10.167.68.2610.167.68.27
810.167.68.28/3010.167.68.29 – 10.167.68.3010.167.68.31
910.167.68.32/3010.167.68.33 – 10.167.68.3410.167.68.35
1010.167.68.36/3010.167.68.37 – 10.167.68.3810.167.68.39
1110.167.68.40/3010.167.68.41 – 10.167.68.4210.167.68.43
1210.167.68.44/3010.167.68.45 – 10.167.68.4610.167.68.47
1310.167.68.48/3010.167.68.49 – 10.167.68.5010.167.68.51
1410.167.68.52/3010.167.68.53 – 10.167.68.5410.167.68.55
1510.167.68.56/3010.167.68.57 – 10.167.68.5810.167.68.59
1610.167.68.60/3010.167.68.61 – 10.167.68.6210.167.68.63
1710.167.68.64/3010.167.68.65 – 10.167.68.6610.167.68.67
1810.167.68.68/3010.167.68.69 – 10.167.68.7010.167.68.71
1910.167.68.72/3010.167.68.73 – 10.167.68.7410.167.68.75
2010.167.68.76/3010.167.68.77 – 10.167.68.7810.167.68.79
2110.167.68.80/3010.167.68.81 – 10.167.68.8210.167.68.83
2210.167.68.84/3010.167.68.85 – 10.167.68.8610.167.68.87
2310.167.68.88/3010.167.68.89 – 10.167.68.9010.167.68.91
2410.167.68.92/3010.167.68.93 – 10.167.68.9410.167.68.95
2510.167.68.96/3010.167.68.97 – 10.167.68.9810.167.68.99
2610.167.68.100/3010.167.68.101 – 10.167.68.10210.167.68.103
2710.167.68.104/3010.167.68.105 – 10.167.68.10610.167.68.107
2810.167.68.108/3010.167.68.109 – 10.167.68.11010.167.68.111
2910.167.68.112/3010.167.68.113 – 10.167.68.11410.167.68.115
3010.167.68.116/3010.167.68.117 – 10.167.68.11810.167.68.119
3110.167.68.120/3010.167.68.121 – 10.167.68.12210.167.68.123
3210.167.68.124/3010.167.68.125 – 10.167.68.12610.167.68.127
3310.167.68.128/3010.167.68.129 – 10.167.68.13010.167.68.131
3410.167.68.132/3010.167.68.133 – 10.167.68.13410.167.68.135
3510.167.68.136/3010.167.68.137 – 10.167.68.13810.167.68.139
3610.167.68.140/3010.167.68.141 – 10.167.68.14210.167.68.143
3710.167.68.144/3010.167.68.145 – 10.167.68.14610.167.68.147
3810.167.68.148/3010.167.68.149 – 10.167.68.15010.167.68.151
3910.167.68.152/3010.167.68.153 – 10.167.68.15410.167.68.155
4010.167.68.156/3010.167.68.157 – 10.167.68.15810.167.68.159
4110.167.68.160/3010.167.68.161 – 10.167.68.16210.167.68.163
4210.167.68.164/3010.167.68.165 – 10.167.68.16610.167.68.167
4310.167.68.168/3010.167.68.169 – 10.167.68.17010.167.68.171
4410.167.68.172/3010.167.68.173 – 10.167.68.17410.167.68.175
4510.167.68.176/3010.167.68.177 – 10.167.68.17810.167.68.179
4610.167.68.180/3010.167.68.181 – 10.167.68.18210.167.68.183
4710.167.68.184/3010.167.68.185 – 10.167.68.18610.167.68.187
4810.167.68.188/3010.167.68.189 – 10.167.68.19010.167.68.191
4910.167.68.192/3010.167.68.193 – 10.167.68.19410.167.68.195
5010.167.68.196/3010.167.68.197 – 10.167.68.19810.167.68.199
5110.167.68.200/3010.167.68.201 – 10.167.68.20210.167.68.203
5210.167.68.204/3010.167.68.205 – 10.167.68.20610.167.68.207
5310.167.68.208/3010.167.68.209 – 10.167.68.21010.167.68.211
5410.167.68.212/3010.167.68.213 – 10.167.68.21410.167.68.215
5510.167.68.216/3010.167.68.217 – 10.167.68.21810.167.68.219
5610.167.68.220/3010.167.68.221 – 10.167.68.22210.167.68.223
5710.167.68.224/3010.167.68.225 – 10.167.68.22610.167.68.227
5810.167.68.228/3010.167.68.229 – 10.167.68.23010.167.68.231
5910.167.68.232/3010.167.68.233 – 10.167.68.23410.167.68.235
6010.167.68.236/3010.167.68.237 – 10.167.68.23810.167.68.239
6110.167.68.240/3010.167.68.241 – 10.167.68.24210.167.68.243
6210.167.68.244/3010.167.68.245 – 10.167.68.24610.167.68.247
6310.167.68.248/3010.167.68.249 – 10.167.68.25010.167.68.251
6410.167.68.252/3010.167.68.253 – 10.167.68.25410.167.68.255
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 →