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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)10.136.182.0/24
network10.136.182.0/24
broadcast10.136.182.255
first host10.136.182.1
last host10.136.182.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.136.182.0/24
address00001010.10001000.10110110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10001000.10110110.00000000
broadcast00001010.10001000.10110110.11111111
green = network part, grey = host part
hex0x0a88b600
decimal176731648
reverse dns0.182.136.10.in-addr.arpa
ipv4-mapped::ffff:a88:b600

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.136.182.0/3010.136.182.1 – 10.136.182.210.136.182.3
210.136.182.4/3010.136.182.5 – 10.136.182.610.136.182.7
310.136.182.8/3010.136.182.9 – 10.136.182.1010.136.182.11
410.136.182.12/3010.136.182.13 – 10.136.182.1410.136.182.15
510.136.182.16/3010.136.182.17 – 10.136.182.1810.136.182.19
610.136.182.20/3010.136.182.21 – 10.136.182.2210.136.182.23
710.136.182.24/3010.136.182.25 – 10.136.182.2610.136.182.27
810.136.182.28/3010.136.182.29 – 10.136.182.3010.136.182.31
910.136.182.32/3010.136.182.33 – 10.136.182.3410.136.182.35
1010.136.182.36/3010.136.182.37 – 10.136.182.3810.136.182.39
1110.136.182.40/3010.136.182.41 – 10.136.182.4210.136.182.43
1210.136.182.44/3010.136.182.45 – 10.136.182.4610.136.182.47
1310.136.182.48/3010.136.182.49 – 10.136.182.5010.136.182.51
1410.136.182.52/3010.136.182.53 – 10.136.182.5410.136.182.55
1510.136.182.56/3010.136.182.57 – 10.136.182.5810.136.182.59
1610.136.182.60/3010.136.182.61 – 10.136.182.6210.136.182.63
1710.136.182.64/3010.136.182.65 – 10.136.182.6610.136.182.67
1810.136.182.68/3010.136.182.69 – 10.136.182.7010.136.182.71
1910.136.182.72/3010.136.182.73 – 10.136.182.7410.136.182.75
2010.136.182.76/3010.136.182.77 – 10.136.182.7810.136.182.79
2110.136.182.80/3010.136.182.81 – 10.136.182.8210.136.182.83
2210.136.182.84/3010.136.182.85 – 10.136.182.8610.136.182.87
2310.136.182.88/3010.136.182.89 – 10.136.182.9010.136.182.91
2410.136.182.92/3010.136.182.93 – 10.136.182.9410.136.182.95
2510.136.182.96/3010.136.182.97 – 10.136.182.9810.136.182.99
2610.136.182.100/3010.136.182.101 – 10.136.182.10210.136.182.103
2710.136.182.104/3010.136.182.105 – 10.136.182.10610.136.182.107
2810.136.182.108/3010.136.182.109 – 10.136.182.11010.136.182.111
2910.136.182.112/3010.136.182.113 – 10.136.182.11410.136.182.115
3010.136.182.116/3010.136.182.117 – 10.136.182.11810.136.182.119
3110.136.182.120/3010.136.182.121 – 10.136.182.12210.136.182.123
3210.136.182.124/3010.136.182.125 – 10.136.182.12610.136.182.127
3310.136.182.128/3010.136.182.129 – 10.136.182.13010.136.182.131
3410.136.182.132/3010.136.182.133 – 10.136.182.13410.136.182.135
3510.136.182.136/3010.136.182.137 – 10.136.182.13810.136.182.139
3610.136.182.140/3010.136.182.141 – 10.136.182.14210.136.182.143
3710.136.182.144/3010.136.182.145 – 10.136.182.14610.136.182.147
3810.136.182.148/3010.136.182.149 – 10.136.182.15010.136.182.151
3910.136.182.152/3010.136.182.153 – 10.136.182.15410.136.182.155
4010.136.182.156/3010.136.182.157 – 10.136.182.15810.136.182.159
4110.136.182.160/3010.136.182.161 – 10.136.182.16210.136.182.163
4210.136.182.164/3010.136.182.165 – 10.136.182.16610.136.182.167
4310.136.182.168/3010.136.182.169 – 10.136.182.17010.136.182.171
4410.136.182.172/3010.136.182.173 – 10.136.182.17410.136.182.175
4510.136.182.176/3010.136.182.177 – 10.136.182.17810.136.182.179
4610.136.182.180/3010.136.182.181 – 10.136.182.18210.136.182.183
4710.136.182.184/3010.136.182.185 – 10.136.182.18610.136.182.187
4810.136.182.188/3010.136.182.189 – 10.136.182.19010.136.182.191
4910.136.182.192/3010.136.182.193 – 10.136.182.19410.136.182.195
5010.136.182.196/3010.136.182.197 – 10.136.182.19810.136.182.199
5110.136.182.200/3010.136.182.201 – 10.136.182.20210.136.182.203
5210.136.182.204/3010.136.182.205 – 10.136.182.20610.136.182.207
5310.136.182.208/3010.136.182.209 – 10.136.182.21010.136.182.211
5410.136.182.212/3010.136.182.213 – 10.136.182.21410.136.182.215
5510.136.182.216/3010.136.182.217 – 10.136.182.21810.136.182.219
5610.136.182.220/3010.136.182.221 – 10.136.182.22210.136.182.223
5710.136.182.224/3010.136.182.225 – 10.136.182.22610.136.182.227
5810.136.182.228/3010.136.182.229 – 10.136.182.23010.136.182.231
5910.136.182.232/3010.136.182.233 – 10.136.182.23410.136.182.235
6010.136.182.236/3010.136.182.237 – 10.136.182.23810.136.182.239
6110.136.182.240/3010.136.182.241 – 10.136.182.24210.136.182.243
6210.136.182.244/3010.136.182.245 – 10.136.182.24610.136.182.247
6310.136.182.248/3010.136.182.249 – 10.136.182.25010.136.182.251
6410.136.182.252/3010.136.182.253 – 10.136.182.25410.136.182.255
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 →