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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)10.230.167.0/24
network10.230.167.0/24
broadcast10.230.167.255
first host10.230.167.1
last host10.230.167.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.230.167.0/24
address00001010.11100110.10100111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.11100110.10100111.00000000
broadcast00001010.11100110.10100111.11111111
green = network part, grey = host part
hex0x0ae6a700
decimal182888192
reverse dns0.167.230.10.in-addr.arpa
ipv4-mapped::ffff:ae6:a700

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.230.167.0/3010.230.167.1 – 10.230.167.210.230.167.3
210.230.167.4/3010.230.167.5 – 10.230.167.610.230.167.7
310.230.167.8/3010.230.167.9 – 10.230.167.1010.230.167.11
410.230.167.12/3010.230.167.13 – 10.230.167.1410.230.167.15
510.230.167.16/3010.230.167.17 – 10.230.167.1810.230.167.19
610.230.167.20/3010.230.167.21 – 10.230.167.2210.230.167.23
710.230.167.24/3010.230.167.25 – 10.230.167.2610.230.167.27
810.230.167.28/3010.230.167.29 – 10.230.167.3010.230.167.31
910.230.167.32/3010.230.167.33 – 10.230.167.3410.230.167.35
1010.230.167.36/3010.230.167.37 – 10.230.167.3810.230.167.39
1110.230.167.40/3010.230.167.41 – 10.230.167.4210.230.167.43
1210.230.167.44/3010.230.167.45 – 10.230.167.4610.230.167.47
1310.230.167.48/3010.230.167.49 – 10.230.167.5010.230.167.51
1410.230.167.52/3010.230.167.53 – 10.230.167.5410.230.167.55
1510.230.167.56/3010.230.167.57 – 10.230.167.5810.230.167.59
1610.230.167.60/3010.230.167.61 – 10.230.167.6210.230.167.63
1710.230.167.64/3010.230.167.65 – 10.230.167.6610.230.167.67
1810.230.167.68/3010.230.167.69 – 10.230.167.7010.230.167.71
1910.230.167.72/3010.230.167.73 – 10.230.167.7410.230.167.75
2010.230.167.76/3010.230.167.77 – 10.230.167.7810.230.167.79
2110.230.167.80/3010.230.167.81 – 10.230.167.8210.230.167.83
2210.230.167.84/3010.230.167.85 – 10.230.167.8610.230.167.87
2310.230.167.88/3010.230.167.89 – 10.230.167.9010.230.167.91
2410.230.167.92/3010.230.167.93 – 10.230.167.9410.230.167.95
2510.230.167.96/3010.230.167.97 – 10.230.167.9810.230.167.99
2610.230.167.100/3010.230.167.101 – 10.230.167.10210.230.167.103
2710.230.167.104/3010.230.167.105 – 10.230.167.10610.230.167.107
2810.230.167.108/3010.230.167.109 – 10.230.167.11010.230.167.111
2910.230.167.112/3010.230.167.113 – 10.230.167.11410.230.167.115
3010.230.167.116/3010.230.167.117 – 10.230.167.11810.230.167.119
3110.230.167.120/3010.230.167.121 – 10.230.167.12210.230.167.123
3210.230.167.124/3010.230.167.125 – 10.230.167.12610.230.167.127
3310.230.167.128/3010.230.167.129 – 10.230.167.13010.230.167.131
3410.230.167.132/3010.230.167.133 – 10.230.167.13410.230.167.135
3510.230.167.136/3010.230.167.137 – 10.230.167.13810.230.167.139
3610.230.167.140/3010.230.167.141 – 10.230.167.14210.230.167.143
3710.230.167.144/3010.230.167.145 – 10.230.167.14610.230.167.147
3810.230.167.148/3010.230.167.149 – 10.230.167.15010.230.167.151
3910.230.167.152/3010.230.167.153 – 10.230.167.15410.230.167.155
4010.230.167.156/3010.230.167.157 – 10.230.167.15810.230.167.159
4110.230.167.160/3010.230.167.161 – 10.230.167.16210.230.167.163
4210.230.167.164/3010.230.167.165 – 10.230.167.16610.230.167.167
4310.230.167.168/3010.230.167.169 – 10.230.167.17010.230.167.171
4410.230.167.172/3010.230.167.173 – 10.230.167.17410.230.167.175
4510.230.167.176/3010.230.167.177 – 10.230.167.17810.230.167.179
4610.230.167.180/3010.230.167.181 – 10.230.167.18210.230.167.183
4710.230.167.184/3010.230.167.185 – 10.230.167.18610.230.167.187
4810.230.167.188/3010.230.167.189 – 10.230.167.19010.230.167.191
4910.230.167.192/3010.230.167.193 – 10.230.167.19410.230.167.195
5010.230.167.196/3010.230.167.197 – 10.230.167.19810.230.167.199
5110.230.167.200/3010.230.167.201 – 10.230.167.20210.230.167.203
5210.230.167.204/3010.230.167.205 – 10.230.167.20610.230.167.207
5310.230.167.208/3010.230.167.209 – 10.230.167.21010.230.167.211
5410.230.167.212/3010.230.167.213 – 10.230.167.21410.230.167.215
5510.230.167.216/3010.230.167.217 – 10.230.167.21810.230.167.219
5610.230.167.220/3010.230.167.221 – 10.230.167.22210.230.167.223
5710.230.167.224/3010.230.167.225 – 10.230.167.22610.230.167.227
5810.230.167.228/3010.230.167.229 – 10.230.167.23010.230.167.231
5910.230.167.232/3010.230.167.233 – 10.230.167.23410.230.167.235
6010.230.167.236/3010.230.167.237 – 10.230.167.23810.230.167.239
6110.230.167.240/3010.230.167.241 – 10.230.167.24210.230.167.243
6210.230.167.244/3010.230.167.245 – 10.230.167.24610.230.167.247
6310.230.167.248/3010.230.167.249 – 10.230.167.25010.230.167.251
6410.230.167.252/3010.230.167.253 – 10.230.167.25410.230.167.255
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 →