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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)10.78.46.0/24
network10.78.46.0/24
broadcast10.78.46.255
first host10.78.46.1
last host10.78.46.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.46.0/24
address00001010.01001110.00101110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.00101110.00000000
broadcast00001010.01001110.00101110.11111111
green = network part, grey = host part
hex0x0a4e2e00
decimal172895744
reverse dns0.46.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2e00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.46.0/3010.78.46.1 – 10.78.46.210.78.46.3
210.78.46.4/3010.78.46.5 – 10.78.46.610.78.46.7
310.78.46.8/3010.78.46.9 – 10.78.46.1010.78.46.11
410.78.46.12/3010.78.46.13 – 10.78.46.1410.78.46.15
510.78.46.16/3010.78.46.17 – 10.78.46.1810.78.46.19
610.78.46.20/3010.78.46.21 – 10.78.46.2210.78.46.23
710.78.46.24/3010.78.46.25 – 10.78.46.2610.78.46.27
810.78.46.28/3010.78.46.29 – 10.78.46.3010.78.46.31
910.78.46.32/3010.78.46.33 – 10.78.46.3410.78.46.35
1010.78.46.36/3010.78.46.37 – 10.78.46.3810.78.46.39
1110.78.46.40/3010.78.46.41 – 10.78.46.4210.78.46.43
1210.78.46.44/3010.78.46.45 – 10.78.46.4610.78.46.47
1310.78.46.48/3010.78.46.49 – 10.78.46.5010.78.46.51
1410.78.46.52/3010.78.46.53 – 10.78.46.5410.78.46.55
1510.78.46.56/3010.78.46.57 – 10.78.46.5810.78.46.59
1610.78.46.60/3010.78.46.61 – 10.78.46.6210.78.46.63
1710.78.46.64/3010.78.46.65 – 10.78.46.6610.78.46.67
1810.78.46.68/3010.78.46.69 – 10.78.46.7010.78.46.71
1910.78.46.72/3010.78.46.73 – 10.78.46.7410.78.46.75
2010.78.46.76/3010.78.46.77 – 10.78.46.7810.78.46.79
2110.78.46.80/3010.78.46.81 – 10.78.46.8210.78.46.83
2210.78.46.84/3010.78.46.85 – 10.78.46.8610.78.46.87
2310.78.46.88/3010.78.46.89 – 10.78.46.9010.78.46.91
2410.78.46.92/3010.78.46.93 – 10.78.46.9410.78.46.95
2510.78.46.96/3010.78.46.97 – 10.78.46.9810.78.46.99
2610.78.46.100/3010.78.46.101 – 10.78.46.10210.78.46.103
2710.78.46.104/3010.78.46.105 – 10.78.46.10610.78.46.107
2810.78.46.108/3010.78.46.109 – 10.78.46.11010.78.46.111
2910.78.46.112/3010.78.46.113 – 10.78.46.11410.78.46.115
3010.78.46.116/3010.78.46.117 – 10.78.46.11810.78.46.119
3110.78.46.120/3010.78.46.121 – 10.78.46.12210.78.46.123
3210.78.46.124/3010.78.46.125 – 10.78.46.12610.78.46.127
3310.78.46.128/3010.78.46.129 – 10.78.46.13010.78.46.131
3410.78.46.132/3010.78.46.133 – 10.78.46.13410.78.46.135
3510.78.46.136/3010.78.46.137 – 10.78.46.13810.78.46.139
3610.78.46.140/3010.78.46.141 – 10.78.46.14210.78.46.143
3710.78.46.144/3010.78.46.145 – 10.78.46.14610.78.46.147
3810.78.46.148/3010.78.46.149 – 10.78.46.15010.78.46.151
3910.78.46.152/3010.78.46.153 – 10.78.46.15410.78.46.155
4010.78.46.156/3010.78.46.157 – 10.78.46.15810.78.46.159
4110.78.46.160/3010.78.46.161 – 10.78.46.16210.78.46.163
4210.78.46.164/3010.78.46.165 – 10.78.46.16610.78.46.167
4310.78.46.168/3010.78.46.169 – 10.78.46.17010.78.46.171
4410.78.46.172/3010.78.46.173 – 10.78.46.17410.78.46.175
4510.78.46.176/3010.78.46.177 – 10.78.46.17810.78.46.179
4610.78.46.180/3010.78.46.181 – 10.78.46.18210.78.46.183
4710.78.46.184/3010.78.46.185 – 10.78.46.18610.78.46.187
4810.78.46.188/3010.78.46.189 – 10.78.46.19010.78.46.191
4910.78.46.192/3010.78.46.193 – 10.78.46.19410.78.46.195
5010.78.46.196/3010.78.46.197 – 10.78.46.19810.78.46.199
5110.78.46.200/3010.78.46.201 – 10.78.46.20210.78.46.203
5210.78.46.204/3010.78.46.205 – 10.78.46.20610.78.46.207
5310.78.46.208/3010.78.46.209 – 10.78.46.21010.78.46.211
5410.78.46.212/3010.78.46.213 – 10.78.46.21410.78.46.215
5510.78.46.216/3010.78.46.217 – 10.78.46.21810.78.46.219
5610.78.46.220/3010.78.46.221 – 10.78.46.22210.78.46.223
5710.78.46.224/3010.78.46.225 – 10.78.46.22610.78.46.227
5810.78.46.228/3010.78.46.229 – 10.78.46.23010.78.46.231
5910.78.46.232/3010.78.46.233 – 10.78.46.23410.78.46.235
6010.78.46.236/3010.78.46.237 – 10.78.46.23810.78.46.239
6110.78.46.240/3010.78.46.241 – 10.78.46.24210.78.46.243
6210.78.46.244/3010.78.46.245 – 10.78.46.24610.78.46.247
6310.78.46.248/3010.78.46.249 – 10.78.46.25010.78.46.251
6410.78.46.252/3010.78.46.253 – 10.78.46.25410.78.46.255
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 →