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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)10.158.47.0/24
network10.158.47.0/24
broadcast10.158.47.255
first host10.158.47.1
last host10.158.47.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.158.47.0/24
address00001010.10011110.00101111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10011110.00101111.00000000
broadcast00001010.10011110.00101111.11111111
green = network part, grey = host part
hex0x0a9e2f00
decimal178138880
reverse dns0.47.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:2f00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.158.47.0/3010.158.47.1 – 10.158.47.210.158.47.3
210.158.47.4/3010.158.47.5 – 10.158.47.610.158.47.7
310.158.47.8/3010.158.47.9 – 10.158.47.1010.158.47.11
410.158.47.12/3010.158.47.13 – 10.158.47.1410.158.47.15
510.158.47.16/3010.158.47.17 – 10.158.47.1810.158.47.19
610.158.47.20/3010.158.47.21 – 10.158.47.2210.158.47.23
710.158.47.24/3010.158.47.25 – 10.158.47.2610.158.47.27
810.158.47.28/3010.158.47.29 – 10.158.47.3010.158.47.31
910.158.47.32/3010.158.47.33 – 10.158.47.3410.158.47.35
1010.158.47.36/3010.158.47.37 – 10.158.47.3810.158.47.39
1110.158.47.40/3010.158.47.41 – 10.158.47.4210.158.47.43
1210.158.47.44/3010.158.47.45 – 10.158.47.4610.158.47.47
1310.158.47.48/3010.158.47.49 – 10.158.47.5010.158.47.51
1410.158.47.52/3010.158.47.53 – 10.158.47.5410.158.47.55
1510.158.47.56/3010.158.47.57 – 10.158.47.5810.158.47.59
1610.158.47.60/3010.158.47.61 – 10.158.47.6210.158.47.63
1710.158.47.64/3010.158.47.65 – 10.158.47.6610.158.47.67
1810.158.47.68/3010.158.47.69 – 10.158.47.7010.158.47.71
1910.158.47.72/3010.158.47.73 – 10.158.47.7410.158.47.75
2010.158.47.76/3010.158.47.77 – 10.158.47.7810.158.47.79
2110.158.47.80/3010.158.47.81 – 10.158.47.8210.158.47.83
2210.158.47.84/3010.158.47.85 – 10.158.47.8610.158.47.87
2310.158.47.88/3010.158.47.89 – 10.158.47.9010.158.47.91
2410.158.47.92/3010.158.47.93 – 10.158.47.9410.158.47.95
2510.158.47.96/3010.158.47.97 – 10.158.47.9810.158.47.99
2610.158.47.100/3010.158.47.101 – 10.158.47.10210.158.47.103
2710.158.47.104/3010.158.47.105 – 10.158.47.10610.158.47.107
2810.158.47.108/3010.158.47.109 – 10.158.47.11010.158.47.111
2910.158.47.112/3010.158.47.113 – 10.158.47.11410.158.47.115
3010.158.47.116/3010.158.47.117 – 10.158.47.11810.158.47.119
3110.158.47.120/3010.158.47.121 – 10.158.47.12210.158.47.123
3210.158.47.124/3010.158.47.125 – 10.158.47.12610.158.47.127
3310.158.47.128/3010.158.47.129 – 10.158.47.13010.158.47.131
3410.158.47.132/3010.158.47.133 – 10.158.47.13410.158.47.135
3510.158.47.136/3010.158.47.137 – 10.158.47.13810.158.47.139
3610.158.47.140/3010.158.47.141 – 10.158.47.14210.158.47.143
3710.158.47.144/3010.158.47.145 – 10.158.47.14610.158.47.147
3810.158.47.148/3010.158.47.149 – 10.158.47.15010.158.47.151
3910.158.47.152/3010.158.47.153 – 10.158.47.15410.158.47.155
4010.158.47.156/3010.158.47.157 – 10.158.47.15810.158.47.159
4110.158.47.160/3010.158.47.161 – 10.158.47.16210.158.47.163
4210.158.47.164/3010.158.47.165 – 10.158.47.16610.158.47.167
4310.158.47.168/3010.158.47.169 – 10.158.47.17010.158.47.171
4410.158.47.172/3010.158.47.173 – 10.158.47.17410.158.47.175
4510.158.47.176/3010.158.47.177 – 10.158.47.17810.158.47.179
4610.158.47.180/3010.158.47.181 – 10.158.47.18210.158.47.183
4710.158.47.184/3010.158.47.185 – 10.158.47.18610.158.47.187
4810.158.47.188/3010.158.47.189 – 10.158.47.19010.158.47.191
4910.158.47.192/3010.158.47.193 – 10.158.47.19410.158.47.195
5010.158.47.196/3010.158.47.197 – 10.158.47.19810.158.47.199
5110.158.47.200/3010.158.47.201 – 10.158.47.20210.158.47.203
5210.158.47.204/3010.158.47.205 – 10.158.47.20610.158.47.207
5310.158.47.208/3010.158.47.209 – 10.158.47.21010.158.47.211
5410.158.47.212/3010.158.47.213 – 10.158.47.21410.158.47.215
5510.158.47.216/3010.158.47.217 – 10.158.47.21810.158.47.219
5610.158.47.220/3010.158.47.221 – 10.158.47.22210.158.47.223
5710.158.47.224/3010.158.47.225 – 10.158.47.22610.158.47.227
5810.158.47.228/3010.158.47.229 – 10.158.47.23010.158.47.231
5910.158.47.232/3010.158.47.233 – 10.158.47.23410.158.47.235
6010.158.47.236/3010.158.47.237 – 10.158.47.23810.158.47.239
6110.158.47.240/3010.158.47.241 – 10.158.47.24210.158.47.243
6210.158.47.244/3010.158.47.245 – 10.158.47.24610.158.47.247
6310.158.47.248/3010.158.47.249 – 10.158.47.25010.158.47.251
6410.158.47.252/3010.158.47.253 – 10.158.47.25410.158.47.255
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 →