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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)10.78.94.0/24
network10.78.94.0/24
broadcast10.78.94.255
first host10.78.94.1
last host10.78.94.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.94.0/24
address00001010.01001110.01011110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.01011110.00000000
broadcast00001010.01001110.01011110.11111111
green = network part, grey = host part
hex0x0a4e5e00
decimal172908032
reverse dns0.94.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5e00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.94.0/3010.78.94.1 – 10.78.94.210.78.94.3
210.78.94.4/3010.78.94.5 – 10.78.94.610.78.94.7
310.78.94.8/3010.78.94.9 – 10.78.94.1010.78.94.11
410.78.94.12/3010.78.94.13 – 10.78.94.1410.78.94.15
510.78.94.16/3010.78.94.17 – 10.78.94.1810.78.94.19
610.78.94.20/3010.78.94.21 – 10.78.94.2210.78.94.23
710.78.94.24/3010.78.94.25 – 10.78.94.2610.78.94.27
810.78.94.28/3010.78.94.29 – 10.78.94.3010.78.94.31
910.78.94.32/3010.78.94.33 – 10.78.94.3410.78.94.35
1010.78.94.36/3010.78.94.37 – 10.78.94.3810.78.94.39
1110.78.94.40/3010.78.94.41 – 10.78.94.4210.78.94.43
1210.78.94.44/3010.78.94.45 – 10.78.94.4610.78.94.47
1310.78.94.48/3010.78.94.49 – 10.78.94.5010.78.94.51
1410.78.94.52/3010.78.94.53 – 10.78.94.5410.78.94.55
1510.78.94.56/3010.78.94.57 – 10.78.94.5810.78.94.59
1610.78.94.60/3010.78.94.61 – 10.78.94.6210.78.94.63
1710.78.94.64/3010.78.94.65 – 10.78.94.6610.78.94.67
1810.78.94.68/3010.78.94.69 – 10.78.94.7010.78.94.71
1910.78.94.72/3010.78.94.73 – 10.78.94.7410.78.94.75
2010.78.94.76/3010.78.94.77 – 10.78.94.7810.78.94.79
2110.78.94.80/3010.78.94.81 – 10.78.94.8210.78.94.83
2210.78.94.84/3010.78.94.85 – 10.78.94.8610.78.94.87
2310.78.94.88/3010.78.94.89 – 10.78.94.9010.78.94.91
2410.78.94.92/3010.78.94.93 – 10.78.94.9410.78.94.95
2510.78.94.96/3010.78.94.97 – 10.78.94.9810.78.94.99
2610.78.94.100/3010.78.94.101 – 10.78.94.10210.78.94.103
2710.78.94.104/3010.78.94.105 – 10.78.94.10610.78.94.107
2810.78.94.108/3010.78.94.109 – 10.78.94.11010.78.94.111
2910.78.94.112/3010.78.94.113 – 10.78.94.11410.78.94.115
3010.78.94.116/3010.78.94.117 – 10.78.94.11810.78.94.119
3110.78.94.120/3010.78.94.121 – 10.78.94.12210.78.94.123
3210.78.94.124/3010.78.94.125 – 10.78.94.12610.78.94.127
3310.78.94.128/3010.78.94.129 – 10.78.94.13010.78.94.131
3410.78.94.132/3010.78.94.133 – 10.78.94.13410.78.94.135
3510.78.94.136/3010.78.94.137 – 10.78.94.13810.78.94.139
3610.78.94.140/3010.78.94.141 – 10.78.94.14210.78.94.143
3710.78.94.144/3010.78.94.145 – 10.78.94.14610.78.94.147
3810.78.94.148/3010.78.94.149 – 10.78.94.15010.78.94.151
3910.78.94.152/3010.78.94.153 – 10.78.94.15410.78.94.155
4010.78.94.156/3010.78.94.157 – 10.78.94.15810.78.94.159
4110.78.94.160/3010.78.94.161 – 10.78.94.16210.78.94.163
4210.78.94.164/3010.78.94.165 – 10.78.94.16610.78.94.167
4310.78.94.168/3010.78.94.169 – 10.78.94.17010.78.94.171
4410.78.94.172/3010.78.94.173 – 10.78.94.17410.78.94.175
4510.78.94.176/3010.78.94.177 – 10.78.94.17810.78.94.179
4610.78.94.180/3010.78.94.181 – 10.78.94.18210.78.94.183
4710.78.94.184/3010.78.94.185 – 10.78.94.18610.78.94.187
4810.78.94.188/3010.78.94.189 – 10.78.94.19010.78.94.191
4910.78.94.192/3010.78.94.193 – 10.78.94.19410.78.94.195
5010.78.94.196/3010.78.94.197 – 10.78.94.19810.78.94.199
5110.78.94.200/3010.78.94.201 – 10.78.94.20210.78.94.203
5210.78.94.204/3010.78.94.205 – 10.78.94.20610.78.94.207
5310.78.94.208/3010.78.94.209 – 10.78.94.21010.78.94.211
5410.78.94.212/3010.78.94.213 – 10.78.94.21410.78.94.215
5510.78.94.216/3010.78.94.217 – 10.78.94.21810.78.94.219
5610.78.94.220/3010.78.94.221 – 10.78.94.22210.78.94.223
5710.78.94.224/3010.78.94.225 – 10.78.94.22610.78.94.227
5810.78.94.228/3010.78.94.229 – 10.78.94.23010.78.94.231
5910.78.94.232/3010.78.94.233 – 10.78.94.23410.78.94.235
6010.78.94.236/3010.78.94.237 – 10.78.94.23810.78.94.239
6110.78.94.240/3010.78.94.241 – 10.78.94.24210.78.94.243
6210.78.94.244/3010.78.94.245 – 10.78.94.24610.78.94.247
6310.78.94.248/3010.78.94.249 – 10.78.94.25010.78.94.251
6410.78.94.252/3010.78.94.253 – 10.78.94.25410.78.94.255
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 →