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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)10.166.112.0/24
network10.166.112.0/24
broadcast10.166.112.255
first host10.166.112.1
last host10.166.112.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.166.112.0/24
address00001010.10100110.01110000.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10100110.01110000.00000000
broadcast00001010.10100110.01110000.11111111
green = network part, grey = host part
hex0x0aa67000
decimal178679808
reverse dns0.112.166.10.in-addr.arpa
ipv4-mapped::ffff:aa6:7000

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.166.112.0/3010.166.112.1 – 10.166.112.210.166.112.3
210.166.112.4/3010.166.112.5 – 10.166.112.610.166.112.7
310.166.112.8/3010.166.112.9 – 10.166.112.1010.166.112.11
410.166.112.12/3010.166.112.13 – 10.166.112.1410.166.112.15
510.166.112.16/3010.166.112.17 – 10.166.112.1810.166.112.19
610.166.112.20/3010.166.112.21 – 10.166.112.2210.166.112.23
710.166.112.24/3010.166.112.25 – 10.166.112.2610.166.112.27
810.166.112.28/3010.166.112.29 – 10.166.112.3010.166.112.31
910.166.112.32/3010.166.112.33 – 10.166.112.3410.166.112.35
1010.166.112.36/3010.166.112.37 – 10.166.112.3810.166.112.39
1110.166.112.40/3010.166.112.41 – 10.166.112.4210.166.112.43
1210.166.112.44/3010.166.112.45 – 10.166.112.4610.166.112.47
1310.166.112.48/3010.166.112.49 – 10.166.112.5010.166.112.51
1410.166.112.52/3010.166.112.53 – 10.166.112.5410.166.112.55
1510.166.112.56/3010.166.112.57 – 10.166.112.5810.166.112.59
1610.166.112.60/3010.166.112.61 – 10.166.112.6210.166.112.63
1710.166.112.64/3010.166.112.65 – 10.166.112.6610.166.112.67
1810.166.112.68/3010.166.112.69 – 10.166.112.7010.166.112.71
1910.166.112.72/3010.166.112.73 – 10.166.112.7410.166.112.75
2010.166.112.76/3010.166.112.77 – 10.166.112.7810.166.112.79
2110.166.112.80/3010.166.112.81 – 10.166.112.8210.166.112.83
2210.166.112.84/3010.166.112.85 – 10.166.112.8610.166.112.87
2310.166.112.88/3010.166.112.89 – 10.166.112.9010.166.112.91
2410.166.112.92/3010.166.112.93 – 10.166.112.9410.166.112.95
2510.166.112.96/3010.166.112.97 – 10.166.112.9810.166.112.99
2610.166.112.100/3010.166.112.101 – 10.166.112.10210.166.112.103
2710.166.112.104/3010.166.112.105 – 10.166.112.10610.166.112.107
2810.166.112.108/3010.166.112.109 – 10.166.112.11010.166.112.111
2910.166.112.112/3010.166.112.113 – 10.166.112.11410.166.112.115
3010.166.112.116/3010.166.112.117 – 10.166.112.11810.166.112.119
3110.166.112.120/3010.166.112.121 – 10.166.112.12210.166.112.123
3210.166.112.124/3010.166.112.125 – 10.166.112.12610.166.112.127
3310.166.112.128/3010.166.112.129 – 10.166.112.13010.166.112.131
3410.166.112.132/3010.166.112.133 – 10.166.112.13410.166.112.135
3510.166.112.136/3010.166.112.137 – 10.166.112.13810.166.112.139
3610.166.112.140/3010.166.112.141 – 10.166.112.14210.166.112.143
3710.166.112.144/3010.166.112.145 – 10.166.112.14610.166.112.147
3810.166.112.148/3010.166.112.149 – 10.166.112.15010.166.112.151
3910.166.112.152/3010.166.112.153 – 10.166.112.15410.166.112.155
4010.166.112.156/3010.166.112.157 – 10.166.112.15810.166.112.159
4110.166.112.160/3010.166.112.161 – 10.166.112.16210.166.112.163
4210.166.112.164/3010.166.112.165 – 10.166.112.16610.166.112.167
4310.166.112.168/3010.166.112.169 – 10.166.112.17010.166.112.171
4410.166.112.172/3010.166.112.173 – 10.166.112.17410.166.112.175
4510.166.112.176/3010.166.112.177 – 10.166.112.17810.166.112.179
4610.166.112.180/3010.166.112.181 – 10.166.112.18210.166.112.183
4710.166.112.184/3010.166.112.185 – 10.166.112.18610.166.112.187
4810.166.112.188/3010.166.112.189 – 10.166.112.19010.166.112.191
4910.166.112.192/3010.166.112.193 – 10.166.112.19410.166.112.195
5010.166.112.196/3010.166.112.197 – 10.166.112.19810.166.112.199
5110.166.112.200/3010.166.112.201 – 10.166.112.20210.166.112.203
5210.166.112.204/3010.166.112.205 – 10.166.112.20610.166.112.207
5310.166.112.208/3010.166.112.209 – 10.166.112.21010.166.112.211
5410.166.112.212/3010.166.112.213 – 10.166.112.21410.166.112.215
5510.166.112.216/3010.166.112.217 – 10.166.112.21810.166.112.219
5610.166.112.220/3010.166.112.221 – 10.166.112.22210.166.112.223
5710.166.112.224/3010.166.112.225 – 10.166.112.22610.166.112.227
5810.166.112.228/3010.166.112.229 – 10.166.112.23010.166.112.231
5910.166.112.232/3010.166.112.233 – 10.166.112.23410.166.112.235
6010.166.112.236/3010.166.112.237 – 10.166.112.23810.166.112.239
6110.166.112.240/3010.166.112.241 – 10.166.112.24210.166.112.243
6210.166.112.244/3010.166.112.245 – 10.166.112.24610.166.112.247
6310.166.112.248/3010.166.112.249 – 10.166.112.25010.166.112.251
6410.166.112.252/3010.166.112.253 – 10.166.112.25410.166.112.255
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 →