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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)10.78.74.0/24
network10.78.74.0/24
broadcast10.78.74.255
first host10.78.74.1
last host10.78.74.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.74.0/24
address00001010.01001110.01001010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.01001010.00000000
broadcast00001010.01001110.01001010.11111111
green = network part, grey = host part
hex0x0a4e4a00
decimal172902912
reverse dns0.74.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4a00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.74.0/3010.78.74.1 – 10.78.74.210.78.74.3
210.78.74.4/3010.78.74.5 – 10.78.74.610.78.74.7
310.78.74.8/3010.78.74.9 – 10.78.74.1010.78.74.11
410.78.74.12/3010.78.74.13 – 10.78.74.1410.78.74.15
510.78.74.16/3010.78.74.17 – 10.78.74.1810.78.74.19
610.78.74.20/3010.78.74.21 – 10.78.74.2210.78.74.23
710.78.74.24/3010.78.74.25 – 10.78.74.2610.78.74.27
810.78.74.28/3010.78.74.29 – 10.78.74.3010.78.74.31
910.78.74.32/3010.78.74.33 – 10.78.74.3410.78.74.35
1010.78.74.36/3010.78.74.37 – 10.78.74.3810.78.74.39
1110.78.74.40/3010.78.74.41 – 10.78.74.4210.78.74.43
1210.78.74.44/3010.78.74.45 – 10.78.74.4610.78.74.47
1310.78.74.48/3010.78.74.49 – 10.78.74.5010.78.74.51
1410.78.74.52/3010.78.74.53 – 10.78.74.5410.78.74.55
1510.78.74.56/3010.78.74.57 – 10.78.74.5810.78.74.59
1610.78.74.60/3010.78.74.61 – 10.78.74.6210.78.74.63
1710.78.74.64/3010.78.74.65 – 10.78.74.6610.78.74.67
1810.78.74.68/3010.78.74.69 – 10.78.74.7010.78.74.71
1910.78.74.72/3010.78.74.73 – 10.78.74.7410.78.74.75
2010.78.74.76/3010.78.74.77 – 10.78.74.7810.78.74.79
2110.78.74.80/3010.78.74.81 – 10.78.74.8210.78.74.83
2210.78.74.84/3010.78.74.85 – 10.78.74.8610.78.74.87
2310.78.74.88/3010.78.74.89 – 10.78.74.9010.78.74.91
2410.78.74.92/3010.78.74.93 – 10.78.74.9410.78.74.95
2510.78.74.96/3010.78.74.97 – 10.78.74.9810.78.74.99
2610.78.74.100/3010.78.74.101 – 10.78.74.10210.78.74.103
2710.78.74.104/3010.78.74.105 – 10.78.74.10610.78.74.107
2810.78.74.108/3010.78.74.109 – 10.78.74.11010.78.74.111
2910.78.74.112/3010.78.74.113 – 10.78.74.11410.78.74.115
3010.78.74.116/3010.78.74.117 – 10.78.74.11810.78.74.119
3110.78.74.120/3010.78.74.121 – 10.78.74.12210.78.74.123
3210.78.74.124/3010.78.74.125 – 10.78.74.12610.78.74.127
3310.78.74.128/3010.78.74.129 – 10.78.74.13010.78.74.131
3410.78.74.132/3010.78.74.133 – 10.78.74.13410.78.74.135
3510.78.74.136/3010.78.74.137 – 10.78.74.13810.78.74.139
3610.78.74.140/3010.78.74.141 – 10.78.74.14210.78.74.143
3710.78.74.144/3010.78.74.145 – 10.78.74.14610.78.74.147
3810.78.74.148/3010.78.74.149 – 10.78.74.15010.78.74.151
3910.78.74.152/3010.78.74.153 – 10.78.74.15410.78.74.155
4010.78.74.156/3010.78.74.157 – 10.78.74.15810.78.74.159
4110.78.74.160/3010.78.74.161 – 10.78.74.16210.78.74.163
4210.78.74.164/3010.78.74.165 – 10.78.74.16610.78.74.167
4310.78.74.168/3010.78.74.169 – 10.78.74.17010.78.74.171
4410.78.74.172/3010.78.74.173 – 10.78.74.17410.78.74.175
4510.78.74.176/3010.78.74.177 – 10.78.74.17810.78.74.179
4610.78.74.180/3010.78.74.181 – 10.78.74.18210.78.74.183
4710.78.74.184/3010.78.74.185 – 10.78.74.18610.78.74.187
4810.78.74.188/3010.78.74.189 – 10.78.74.19010.78.74.191
4910.78.74.192/3010.78.74.193 – 10.78.74.19410.78.74.195
5010.78.74.196/3010.78.74.197 – 10.78.74.19810.78.74.199
5110.78.74.200/3010.78.74.201 – 10.78.74.20210.78.74.203
5210.78.74.204/3010.78.74.205 – 10.78.74.20610.78.74.207
5310.78.74.208/3010.78.74.209 – 10.78.74.21010.78.74.211
5410.78.74.212/3010.78.74.213 – 10.78.74.21410.78.74.215
5510.78.74.216/3010.78.74.217 – 10.78.74.21810.78.74.219
5610.78.74.220/3010.78.74.221 – 10.78.74.22210.78.74.223
5710.78.74.224/3010.78.74.225 – 10.78.74.22610.78.74.227
5810.78.74.228/3010.78.74.229 – 10.78.74.23010.78.74.231
5910.78.74.232/3010.78.74.233 – 10.78.74.23410.78.74.235
6010.78.74.236/3010.78.74.237 – 10.78.74.23810.78.74.239
6110.78.74.240/3010.78.74.241 – 10.78.74.24210.78.74.243
6210.78.74.244/3010.78.74.245 – 10.78.74.24610.78.74.247
6310.78.74.248/3010.78.74.249 – 10.78.74.25010.78.74.251
6410.78.74.252/3010.78.74.253 – 10.78.74.25410.78.74.255
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 →