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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)10.103.232.0/24
network10.103.232.0/24
broadcast10.103.232.255
first host10.103.232.1
last host10.103.232.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.103.232.0/24
address00001010.01100111.11101000.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01100111.11101000.00000000
broadcast00001010.01100111.11101000.11111111
green = network part, grey = host part
hex0x0a67e800
decimal174581760
reverse dns0.232.103.10.in-addr.arpa
ipv4-mapped::ffff:a67:e800

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.103.232.0/3010.103.232.1 – 10.103.232.210.103.232.3
210.103.232.4/3010.103.232.5 – 10.103.232.610.103.232.7
310.103.232.8/3010.103.232.9 – 10.103.232.1010.103.232.11
410.103.232.12/3010.103.232.13 – 10.103.232.1410.103.232.15
510.103.232.16/3010.103.232.17 – 10.103.232.1810.103.232.19
610.103.232.20/3010.103.232.21 – 10.103.232.2210.103.232.23
710.103.232.24/3010.103.232.25 – 10.103.232.2610.103.232.27
810.103.232.28/3010.103.232.29 – 10.103.232.3010.103.232.31
910.103.232.32/3010.103.232.33 – 10.103.232.3410.103.232.35
1010.103.232.36/3010.103.232.37 – 10.103.232.3810.103.232.39
1110.103.232.40/3010.103.232.41 – 10.103.232.4210.103.232.43
1210.103.232.44/3010.103.232.45 – 10.103.232.4610.103.232.47
1310.103.232.48/3010.103.232.49 – 10.103.232.5010.103.232.51
1410.103.232.52/3010.103.232.53 – 10.103.232.5410.103.232.55
1510.103.232.56/3010.103.232.57 – 10.103.232.5810.103.232.59
1610.103.232.60/3010.103.232.61 – 10.103.232.6210.103.232.63
1710.103.232.64/3010.103.232.65 – 10.103.232.6610.103.232.67
1810.103.232.68/3010.103.232.69 – 10.103.232.7010.103.232.71
1910.103.232.72/3010.103.232.73 – 10.103.232.7410.103.232.75
2010.103.232.76/3010.103.232.77 – 10.103.232.7810.103.232.79
2110.103.232.80/3010.103.232.81 – 10.103.232.8210.103.232.83
2210.103.232.84/3010.103.232.85 – 10.103.232.8610.103.232.87
2310.103.232.88/3010.103.232.89 – 10.103.232.9010.103.232.91
2410.103.232.92/3010.103.232.93 – 10.103.232.9410.103.232.95
2510.103.232.96/3010.103.232.97 – 10.103.232.9810.103.232.99
2610.103.232.100/3010.103.232.101 – 10.103.232.10210.103.232.103
2710.103.232.104/3010.103.232.105 – 10.103.232.10610.103.232.107
2810.103.232.108/3010.103.232.109 – 10.103.232.11010.103.232.111
2910.103.232.112/3010.103.232.113 – 10.103.232.11410.103.232.115
3010.103.232.116/3010.103.232.117 – 10.103.232.11810.103.232.119
3110.103.232.120/3010.103.232.121 – 10.103.232.12210.103.232.123
3210.103.232.124/3010.103.232.125 – 10.103.232.12610.103.232.127
3310.103.232.128/3010.103.232.129 – 10.103.232.13010.103.232.131
3410.103.232.132/3010.103.232.133 – 10.103.232.13410.103.232.135
3510.103.232.136/3010.103.232.137 – 10.103.232.13810.103.232.139
3610.103.232.140/3010.103.232.141 – 10.103.232.14210.103.232.143
3710.103.232.144/3010.103.232.145 – 10.103.232.14610.103.232.147
3810.103.232.148/3010.103.232.149 – 10.103.232.15010.103.232.151
3910.103.232.152/3010.103.232.153 – 10.103.232.15410.103.232.155
4010.103.232.156/3010.103.232.157 – 10.103.232.15810.103.232.159
4110.103.232.160/3010.103.232.161 – 10.103.232.16210.103.232.163
4210.103.232.164/3010.103.232.165 – 10.103.232.16610.103.232.167
4310.103.232.168/3010.103.232.169 – 10.103.232.17010.103.232.171
4410.103.232.172/3010.103.232.173 – 10.103.232.17410.103.232.175
4510.103.232.176/3010.103.232.177 – 10.103.232.17810.103.232.179
4610.103.232.180/3010.103.232.181 – 10.103.232.18210.103.232.183
4710.103.232.184/3010.103.232.185 – 10.103.232.18610.103.232.187
4810.103.232.188/3010.103.232.189 – 10.103.232.19010.103.232.191
4910.103.232.192/3010.103.232.193 – 10.103.232.19410.103.232.195
5010.103.232.196/3010.103.232.197 – 10.103.232.19810.103.232.199
5110.103.232.200/3010.103.232.201 – 10.103.232.20210.103.232.203
5210.103.232.204/3010.103.232.205 – 10.103.232.20610.103.232.207
5310.103.232.208/3010.103.232.209 – 10.103.232.21010.103.232.211
5410.103.232.212/3010.103.232.213 – 10.103.232.21410.103.232.215
5510.103.232.216/3010.103.232.217 – 10.103.232.21810.103.232.219
5610.103.232.220/3010.103.232.221 – 10.103.232.22210.103.232.223
5710.103.232.224/3010.103.232.225 – 10.103.232.22610.103.232.227
5810.103.232.228/3010.103.232.229 – 10.103.232.23010.103.232.231
5910.103.232.232/3010.103.232.233 – 10.103.232.23410.103.232.235
6010.103.232.236/3010.103.232.237 – 10.103.232.23810.103.232.239
6110.103.232.240/3010.103.232.241 – 10.103.232.24210.103.232.243
6210.103.232.244/3010.103.232.245 – 10.103.232.24610.103.232.247
6310.103.232.248/3010.103.232.249 – 10.103.232.25010.103.232.251
6410.103.232.252/3010.103.232.253 – 10.103.232.25410.103.232.255
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 →