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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)10.231.86.0/24
network10.231.86.0/24
broadcast10.231.86.255
first host10.231.86.1
last host10.231.86.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.231.86.0/24
address00001010.11100111.01010110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.11100111.01010110.00000000
broadcast00001010.11100111.01010110.11111111
green = network part, grey = host part
hex0x0ae75600
decimal182932992
reverse dns0.86.231.10.in-addr.arpa
ipv4-mapped::ffff:ae7:5600

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.231.86.0/3010.231.86.1 – 10.231.86.210.231.86.3
210.231.86.4/3010.231.86.5 – 10.231.86.610.231.86.7
310.231.86.8/3010.231.86.9 – 10.231.86.1010.231.86.11
410.231.86.12/3010.231.86.13 – 10.231.86.1410.231.86.15
510.231.86.16/3010.231.86.17 – 10.231.86.1810.231.86.19
610.231.86.20/3010.231.86.21 – 10.231.86.2210.231.86.23
710.231.86.24/3010.231.86.25 – 10.231.86.2610.231.86.27
810.231.86.28/3010.231.86.29 – 10.231.86.3010.231.86.31
910.231.86.32/3010.231.86.33 – 10.231.86.3410.231.86.35
1010.231.86.36/3010.231.86.37 – 10.231.86.3810.231.86.39
1110.231.86.40/3010.231.86.41 – 10.231.86.4210.231.86.43
1210.231.86.44/3010.231.86.45 – 10.231.86.4610.231.86.47
1310.231.86.48/3010.231.86.49 – 10.231.86.5010.231.86.51
1410.231.86.52/3010.231.86.53 – 10.231.86.5410.231.86.55
1510.231.86.56/3010.231.86.57 – 10.231.86.5810.231.86.59
1610.231.86.60/3010.231.86.61 – 10.231.86.6210.231.86.63
1710.231.86.64/3010.231.86.65 – 10.231.86.6610.231.86.67
1810.231.86.68/3010.231.86.69 – 10.231.86.7010.231.86.71
1910.231.86.72/3010.231.86.73 – 10.231.86.7410.231.86.75
2010.231.86.76/3010.231.86.77 – 10.231.86.7810.231.86.79
2110.231.86.80/3010.231.86.81 – 10.231.86.8210.231.86.83
2210.231.86.84/3010.231.86.85 – 10.231.86.8610.231.86.87
2310.231.86.88/3010.231.86.89 – 10.231.86.9010.231.86.91
2410.231.86.92/3010.231.86.93 – 10.231.86.9410.231.86.95
2510.231.86.96/3010.231.86.97 – 10.231.86.9810.231.86.99
2610.231.86.100/3010.231.86.101 – 10.231.86.10210.231.86.103
2710.231.86.104/3010.231.86.105 – 10.231.86.10610.231.86.107
2810.231.86.108/3010.231.86.109 – 10.231.86.11010.231.86.111
2910.231.86.112/3010.231.86.113 – 10.231.86.11410.231.86.115
3010.231.86.116/3010.231.86.117 – 10.231.86.11810.231.86.119
3110.231.86.120/3010.231.86.121 – 10.231.86.12210.231.86.123
3210.231.86.124/3010.231.86.125 – 10.231.86.12610.231.86.127
3310.231.86.128/3010.231.86.129 – 10.231.86.13010.231.86.131
3410.231.86.132/3010.231.86.133 – 10.231.86.13410.231.86.135
3510.231.86.136/3010.231.86.137 – 10.231.86.13810.231.86.139
3610.231.86.140/3010.231.86.141 – 10.231.86.14210.231.86.143
3710.231.86.144/3010.231.86.145 – 10.231.86.14610.231.86.147
3810.231.86.148/3010.231.86.149 – 10.231.86.15010.231.86.151
3910.231.86.152/3010.231.86.153 – 10.231.86.15410.231.86.155
4010.231.86.156/3010.231.86.157 – 10.231.86.15810.231.86.159
4110.231.86.160/3010.231.86.161 – 10.231.86.16210.231.86.163
4210.231.86.164/3010.231.86.165 – 10.231.86.16610.231.86.167
4310.231.86.168/3010.231.86.169 – 10.231.86.17010.231.86.171
4410.231.86.172/3010.231.86.173 – 10.231.86.17410.231.86.175
4510.231.86.176/3010.231.86.177 – 10.231.86.17810.231.86.179
4610.231.86.180/3010.231.86.181 – 10.231.86.18210.231.86.183
4710.231.86.184/3010.231.86.185 – 10.231.86.18610.231.86.187
4810.231.86.188/3010.231.86.189 – 10.231.86.19010.231.86.191
4910.231.86.192/3010.231.86.193 – 10.231.86.19410.231.86.195
5010.231.86.196/3010.231.86.197 – 10.231.86.19810.231.86.199
5110.231.86.200/3010.231.86.201 – 10.231.86.20210.231.86.203
5210.231.86.204/3010.231.86.205 – 10.231.86.20610.231.86.207
5310.231.86.208/3010.231.86.209 – 10.231.86.21010.231.86.211
5410.231.86.212/3010.231.86.213 – 10.231.86.21410.231.86.215
5510.231.86.216/3010.231.86.217 – 10.231.86.21810.231.86.219
5610.231.86.220/3010.231.86.221 – 10.231.86.22210.231.86.223
5710.231.86.224/3010.231.86.225 – 10.231.86.22610.231.86.227
5810.231.86.228/3010.231.86.229 – 10.231.86.23010.231.86.231
5910.231.86.232/3010.231.86.233 – 10.231.86.23410.231.86.235
6010.231.86.236/3010.231.86.237 – 10.231.86.23810.231.86.239
6110.231.86.240/3010.231.86.241 – 10.231.86.24210.231.86.243
6210.231.86.244/3010.231.86.245 – 10.231.86.24610.231.86.247
6310.231.86.248/3010.231.86.249 – 10.231.86.25010.231.86.251
6410.231.86.252/3010.231.86.253 – 10.231.86.25410.231.86.255
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 →