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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)10.6.86.0/24
network10.6.86.0/24
broadcast10.6.86.255
first host10.6.86.1
last host10.6.86.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.6.86.0/24
address00001010.00000110.01010110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000110.01010110.00000000
broadcast00001010.00000110.01010110.11111111
green = network part, grey = host part
hex0x0a065600
decimal168187392
reverse dns0.86.6.10.in-addr.arpa
ipv4-mapped::ffff:a06:5600

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.6.86.0/3010.6.86.1 – 10.6.86.210.6.86.3
210.6.86.4/3010.6.86.5 – 10.6.86.610.6.86.7
310.6.86.8/3010.6.86.9 – 10.6.86.1010.6.86.11
410.6.86.12/3010.6.86.13 – 10.6.86.1410.6.86.15
510.6.86.16/3010.6.86.17 – 10.6.86.1810.6.86.19
610.6.86.20/3010.6.86.21 – 10.6.86.2210.6.86.23
710.6.86.24/3010.6.86.25 – 10.6.86.2610.6.86.27
810.6.86.28/3010.6.86.29 – 10.6.86.3010.6.86.31
910.6.86.32/3010.6.86.33 – 10.6.86.3410.6.86.35
1010.6.86.36/3010.6.86.37 – 10.6.86.3810.6.86.39
1110.6.86.40/3010.6.86.41 – 10.6.86.4210.6.86.43
1210.6.86.44/3010.6.86.45 – 10.6.86.4610.6.86.47
1310.6.86.48/3010.6.86.49 – 10.6.86.5010.6.86.51
1410.6.86.52/3010.6.86.53 – 10.6.86.5410.6.86.55
1510.6.86.56/3010.6.86.57 – 10.6.86.5810.6.86.59
1610.6.86.60/3010.6.86.61 – 10.6.86.6210.6.86.63
1710.6.86.64/3010.6.86.65 – 10.6.86.6610.6.86.67
1810.6.86.68/3010.6.86.69 – 10.6.86.7010.6.86.71
1910.6.86.72/3010.6.86.73 – 10.6.86.7410.6.86.75
2010.6.86.76/3010.6.86.77 – 10.6.86.7810.6.86.79
2110.6.86.80/3010.6.86.81 – 10.6.86.8210.6.86.83
2210.6.86.84/3010.6.86.85 – 10.6.86.8610.6.86.87
2310.6.86.88/3010.6.86.89 – 10.6.86.9010.6.86.91
2410.6.86.92/3010.6.86.93 – 10.6.86.9410.6.86.95
2510.6.86.96/3010.6.86.97 – 10.6.86.9810.6.86.99
2610.6.86.100/3010.6.86.101 – 10.6.86.10210.6.86.103
2710.6.86.104/3010.6.86.105 – 10.6.86.10610.6.86.107
2810.6.86.108/3010.6.86.109 – 10.6.86.11010.6.86.111
2910.6.86.112/3010.6.86.113 – 10.6.86.11410.6.86.115
3010.6.86.116/3010.6.86.117 – 10.6.86.11810.6.86.119
3110.6.86.120/3010.6.86.121 – 10.6.86.12210.6.86.123
3210.6.86.124/3010.6.86.125 – 10.6.86.12610.6.86.127
3310.6.86.128/3010.6.86.129 – 10.6.86.13010.6.86.131
3410.6.86.132/3010.6.86.133 – 10.6.86.13410.6.86.135
3510.6.86.136/3010.6.86.137 – 10.6.86.13810.6.86.139
3610.6.86.140/3010.6.86.141 – 10.6.86.14210.6.86.143
3710.6.86.144/3010.6.86.145 – 10.6.86.14610.6.86.147
3810.6.86.148/3010.6.86.149 – 10.6.86.15010.6.86.151
3910.6.86.152/3010.6.86.153 – 10.6.86.15410.6.86.155
4010.6.86.156/3010.6.86.157 – 10.6.86.15810.6.86.159
4110.6.86.160/3010.6.86.161 – 10.6.86.16210.6.86.163
4210.6.86.164/3010.6.86.165 – 10.6.86.16610.6.86.167
4310.6.86.168/3010.6.86.169 – 10.6.86.17010.6.86.171
4410.6.86.172/3010.6.86.173 – 10.6.86.17410.6.86.175
4510.6.86.176/3010.6.86.177 – 10.6.86.17810.6.86.179
4610.6.86.180/3010.6.86.181 – 10.6.86.18210.6.86.183
4710.6.86.184/3010.6.86.185 – 10.6.86.18610.6.86.187
4810.6.86.188/3010.6.86.189 – 10.6.86.19010.6.86.191
4910.6.86.192/3010.6.86.193 – 10.6.86.19410.6.86.195
5010.6.86.196/3010.6.86.197 – 10.6.86.19810.6.86.199
5110.6.86.200/3010.6.86.201 – 10.6.86.20210.6.86.203
5210.6.86.204/3010.6.86.205 – 10.6.86.20610.6.86.207
5310.6.86.208/3010.6.86.209 – 10.6.86.21010.6.86.211
5410.6.86.212/3010.6.86.213 – 10.6.86.21410.6.86.215
5510.6.86.216/3010.6.86.217 – 10.6.86.21810.6.86.219
5610.6.86.220/3010.6.86.221 – 10.6.86.22210.6.86.223
5710.6.86.224/3010.6.86.225 – 10.6.86.22610.6.86.227
5810.6.86.228/3010.6.86.229 – 10.6.86.23010.6.86.231
5910.6.86.232/3010.6.86.233 – 10.6.86.23410.6.86.235
6010.6.86.236/3010.6.86.237 – 10.6.86.23810.6.86.239
6110.6.86.240/3010.6.86.241 – 10.6.86.24210.6.86.243
6210.6.86.244/3010.6.86.245 – 10.6.86.24610.6.86.247
6310.6.86.248/3010.6.86.249 – 10.6.86.25010.6.86.251
6410.6.86.252/3010.6.86.253 – 10.6.86.25410.6.86.255
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 →