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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)10.5.22.0/24
network10.5.22.0/24
broadcast10.5.22.255
first host10.5.22.1
last host10.5.22.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.5.22.0/24
address00001010.00000101.00010110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000101.00010110.00000000
broadcast00001010.00000101.00010110.11111111
green = network part, grey = host part
hex0x0a051600
decimal168105472
reverse dns0.22.5.10.in-addr.arpa
ipv4-mapped::ffff:a05:1600

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.5.22.0/3010.5.22.1 – 10.5.22.210.5.22.3
210.5.22.4/3010.5.22.5 – 10.5.22.610.5.22.7
310.5.22.8/3010.5.22.9 – 10.5.22.1010.5.22.11
410.5.22.12/3010.5.22.13 – 10.5.22.1410.5.22.15
510.5.22.16/3010.5.22.17 – 10.5.22.1810.5.22.19
610.5.22.20/3010.5.22.21 – 10.5.22.2210.5.22.23
710.5.22.24/3010.5.22.25 – 10.5.22.2610.5.22.27
810.5.22.28/3010.5.22.29 – 10.5.22.3010.5.22.31
910.5.22.32/3010.5.22.33 – 10.5.22.3410.5.22.35
1010.5.22.36/3010.5.22.37 – 10.5.22.3810.5.22.39
1110.5.22.40/3010.5.22.41 – 10.5.22.4210.5.22.43
1210.5.22.44/3010.5.22.45 – 10.5.22.4610.5.22.47
1310.5.22.48/3010.5.22.49 – 10.5.22.5010.5.22.51
1410.5.22.52/3010.5.22.53 – 10.5.22.5410.5.22.55
1510.5.22.56/3010.5.22.57 – 10.5.22.5810.5.22.59
1610.5.22.60/3010.5.22.61 – 10.5.22.6210.5.22.63
1710.5.22.64/3010.5.22.65 – 10.5.22.6610.5.22.67
1810.5.22.68/3010.5.22.69 – 10.5.22.7010.5.22.71
1910.5.22.72/3010.5.22.73 – 10.5.22.7410.5.22.75
2010.5.22.76/3010.5.22.77 – 10.5.22.7810.5.22.79
2110.5.22.80/3010.5.22.81 – 10.5.22.8210.5.22.83
2210.5.22.84/3010.5.22.85 – 10.5.22.8610.5.22.87
2310.5.22.88/3010.5.22.89 – 10.5.22.9010.5.22.91
2410.5.22.92/3010.5.22.93 – 10.5.22.9410.5.22.95
2510.5.22.96/3010.5.22.97 – 10.5.22.9810.5.22.99
2610.5.22.100/3010.5.22.101 – 10.5.22.10210.5.22.103
2710.5.22.104/3010.5.22.105 – 10.5.22.10610.5.22.107
2810.5.22.108/3010.5.22.109 – 10.5.22.11010.5.22.111
2910.5.22.112/3010.5.22.113 – 10.5.22.11410.5.22.115
3010.5.22.116/3010.5.22.117 – 10.5.22.11810.5.22.119
3110.5.22.120/3010.5.22.121 – 10.5.22.12210.5.22.123
3210.5.22.124/3010.5.22.125 – 10.5.22.12610.5.22.127
3310.5.22.128/3010.5.22.129 – 10.5.22.13010.5.22.131
3410.5.22.132/3010.5.22.133 – 10.5.22.13410.5.22.135
3510.5.22.136/3010.5.22.137 – 10.5.22.13810.5.22.139
3610.5.22.140/3010.5.22.141 – 10.5.22.14210.5.22.143
3710.5.22.144/3010.5.22.145 – 10.5.22.14610.5.22.147
3810.5.22.148/3010.5.22.149 – 10.5.22.15010.5.22.151
3910.5.22.152/3010.5.22.153 – 10.5.22.15410.5.22.155
4010.5.22.156/3010.5.22.157 – 10.5.22.15810.5.22.159
4110.5.22.160/3010.5.22.161 – 10.5.22.16210.5.22.163
4210.5.22.164/3010.5.22.165 – 10.5.22.16610.5.22.167
4310.5.22.168/3010.5.22.169 – 10.5.22.17010.5.22.171
4410.5.22.172/3010.5.22.173 – 10.5.22.17410.5.22.175
4510.5.22.176/3010.5.22.177 – 10.5.22.17810.5.22.179
4610.5.22.180/3010.5.22.181 – 10.5.22.18210.5.22.183
4710.5.22.184/3010.5.22.185 – 10.5.22.18610.5.22.187
4810.5.22.188/3010.5.22.189 – 10.5.22.19010.5.22.191
4910.5.22.192/3010.5.22.193 – 10.5.22.19410.5.22.195
5010.5.22.196/3010.5.22.197 – 10.5.22.19810.5.22.199
5110.5.22.200/3010.5.22.201 – 10.5.22.20210.5.22.203
5210.5.22.204/3010.5.22.205 – 10.5.22.20610.5.22.207
5310.5.22.208/3010.5.22.209 – 10.5.22.21010.5.22.211
5410.5.22.212/3010.5.22.213 – 10.5.22.21410.5.22.215
5510.5.22.216/3010.5.22.217 – 10.5.22.21810.5.22.219
5610.5.22.220/3010.5.22.221 – 10.5.22.22210.5.22.223
5710.5.22.224/3010.5.22.225 – 10.5.22.22610.5.22.227
5810.5.22.228/3010.5.22.229 – 10.5.22.23010.5.22.231
5910.5.22.232/3010.5.22.233 – 10.5.22.23410.5.22.235
6010.5.22.236/3010.5.22.237 – 10.5.22.23810.5.22.239
6110.5.22.240/3010.5.22.241 – 10.5.22.24210.5.22.243
6210.5.22.244/3010.5.22.245 – 10.5.22.24610.5.22.247
6310.5.22.248/3010.5.22.249 – 10.5.22.25010.5.22.251
6410.5.22.252/3010.5.22.253 – 10.5.22.25410.5.22.255
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 →