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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)10.4.200.0/24
network10.4.200.0/24
broadcast10.4.200.255
first host10.4.200.1
last host10.4.200.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.4.200.0/24
address00001010.00000100.11001000.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000100.11001000.00000000
broadcast00001010.00000100.11001000.11111111
green = network part, grey = host part
hex0x0a04c800
decimal168085504
reverse dns0.200.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:c800

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.200.0/3010.4.200.1 – 10.4.200.210.4.200.3
210.4.200.4/3010.4.200.5 – 10.4.200.610.4.200.7
310.4.200.8/3010.4.200.9 – 10.4.200.1010.4.200.11
410.4.200.12/3010.4.200.13 – 10.4.200.1410.4.200.15
510.4.200.16/3010.4.200.17 – 10.4.200.1810.4.200.19
610.4.200.20/3010.4.200.21 – 10.4.200.2210.4.200.23
710.4.200.24/3010.4.200.25 – 10.4.200.2610.4.200.27
810.4.200.28/3010.4.200.29 – 10.4.200.3010.4.200.31
910.4.200.32/3010.4.200.33 – 10.4.200.3410.4.200.35
1010.4.200.36/3010.4.200.37 – 10.4.200.3810.4.200.39
1110.4.200.40/3010.4.200.41 – 10.4.200.4210.4.200.43
1210.4.200.44/3010.4.200.45 – 10.4.200.4610.4.200.47
1310.4.200.48/3010.4.200.49 – 10.4.200.5010.4.200.51
1410.4.200.52/3010.4.200.53 – 10.4.200.5410.4.200.55
1510.4.200.56/3010.4.200.57 – 10.4.200.5810.4.200.59
1610.4.200.60/3010.4.200.61 – 10.4.200.6210.4.200.63
1710.4.200.64/3010.4.200.65 – 10.4.200.6610.4.200.67
1810.4.200.68/3010.4.200.69 – 10.4.200.7010.4.200.71
1910.4.200.72/3010.4.200.73 – 10.4.200.7410.4.200.75
2010.4.200.76/3010.4.200.77 – 10.4.200.7810.4.200.79
2110.4.200.80/3010.4.200.81 – 10.4.200.8210.4.200.83
2210.4.200.84/3010.4.200.85 – 10.4.200.8610.4.200.87
2310.4.200.88/3010.4.200.89 – 10.4.200.9010.4.200.91
2410.4.200.92/3010.4.200.93 – 10.4.200.9410.4.200.95
2510.4.200.96/3010.4.200.97 – 10.4.200.9810.4.200.99
2610.4.200.100/3010.4.200.101 – 10.4.200.10210.4.200.103
2710.4.200.104/3010.4.200.105 – 10.4.200.10610.4.200.107
2810.4.200.108/3010.4.200.109 – 10.4.200.11010.4.200.111
2910.4.200.112/3010.4.200.113 – 10.4.200.11410.4.200.115
3010.4.200.116/3010.4.200.117 – 10.4.200.11810.4.200.119
3110.4.200.120/3010.4.200.121 – 10.4.200.12210.4.200.123
3210.4.200.124/3010.4.200.125 – 10.4.200.12610.4.200.127
3310.4.200.128/3010.4.200.129 – 10.4.200.13010.4.200.131
3410.4.200.132/3010.4.200.133 – 10.4.200.13410.4.200.135
3510.4.200.136/3010.4.200.137 – 10.4.200.13810.4.200.139
3610.4.200.140/3010.4.200.141 – 10.4.200.14210.4.200.143
3710.4.200.144/3010.4.200.145 – 10.4.200.14610.4.200.147
3810.4.200.148/3010.4.200.149 – 10.4.200.15010.4.200.151
3910.4.200.152/3010.4.200.153 – 10.4.200.15410.4.200.155
4010.4.200.156/3010.4.200.157 – 10.4.200.15810.4.200.159
4110.4.200.160/3010.4.200.161 – 10.4.200.16210.4.200.163
4210.4.200.164/3010.4.200.165 – 10.4.200.16610.4.200.167
4310.4.200.168/3010.4.200.169 – 10.4.200.17010.4.200.171
4410.4.200.172/3010.4.200.173 – 10.4.200.17410.4.200.175
4510.4.200.176/3010.4.200.177 – 10.4.200.17810.4.200.179
4610.4.200.180/3010.4.200.181 – 10.4.200.18210.4.200.183
4710.4.200.184/3010.4.200.185 – 10.4.200.18610.4.200.187
4810.4.200.188/3010.4.200.189 – 10.4.200.19010.4.200.191
4910.4.200.192/3010.4.200.193 – 10.4.200.19410.4.200.195
5010.4.200.196/3010.4.200.197 – 10.4.200.19810.4.200.199
5110.4.200.200/3010.4.200.201 – 10.4.200.20210.4.200.203
5210.4.200.204/3010.4.200.205 – 10.4.200.20610.4.200.207
5310.4.200.208/3010.4.200.209 – 10.4.200.21010.4.200.211
5410.4.200.212/3010.4.200.213 – 10.4.200.21410.4.200.215
5510.4.200.216/3010.4.200.217 – 10.4.200.21810.4.200.219
5610.4.200.220/3010.4.200.221 – 10.4.200.22210.4.200.223
5710.4.200.224/3010.4.200.225 – 10.4.200.22610.4.200.227
5810.4.200.228/3010.4.200.229 – 10.4.200.23010.4.200.231
5910.4.200.232/3010.4.200.233 – 10.4.200.23410.4.200.235
6010.4.200.236/3010.4.200.237 – 10.4.200.23810.4.200.239
6110.4.200.240/3010.4.200.241 – 10.4.200.24210.4.200.243
6210.4.200.244/3010.4.200.245 – 10.4.200.24610.4.200.247
6310.4.200.248/3010.4.200.249 – 10.4.200.25010.4.200.251
6410.4.200.252/3010.4.200.253 – 10.4.200.25410.4.200.255
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 →