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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)10.0.58.0/24
network10.0.58.0/24
broadcast10.0.58.255
first host10.0.58.1
last host10.0.58.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.58.0/24
address00001010.00000000.00111010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.00111010.00000000
broadcast00001010.00000000.00111010.11111111
green = network part, grey = host part
hex0x0a003a00
decimal167787008
reverse dns0.58.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:3a00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.58.0/3010.0.58.1 – 10.0.58.210.0.58.3
210.0.58.4/3010.0.58.5 – 10.0.58.610.0.58.7
310.0.58.8/3010.0.58.9 – 10.0.58.1010.0.58.11
410.0.58.12/3010.0.58.13 – 10.0.58.1410.0.58.15
510.0.58.16/3010.0.58.17 – 10.0.58.1810.0.58.19
610.0.58.20/3010.0.58.21 – 10.0.58.2210.0.58.23
710.0.58.24/3010.0.58.25 – 10.0.58.2610.0.58.27
810.0.58.28/3010.0.58.29 – 10.0.58.3010.0.58.31
910.0.58.32/3010.0.58.33 – 10.0.58.3410.0.58.35
1010.0.58.36/3010.0.58.37 – 10.0.58.3810.0.58.39
1110.0.58.40/3010.0.58.41 – 10.0.58.4210.0.58.43
1210.0.58.44/3010.0.58.45 – 10.0.58.4610.0.58.47
1310.0.58.48/3010.0.58.49 – 10.0.58.5010.0.58.51
1410.0.58.52/3010.0.58.53 – 10.0.58.5410.0.58.55
1510.0.58.56/3010.0.58.57 – 10.0.58.5810.0.58.59
1610.0.58.60/3010.0.58.61 – 10.0.58.6210.0.58.63
1710.0.58.64/3010.0.58.65 – 10.0.58.6610.0.58.67
1810.0.58.68/3010.0.58.69 – 10.0.58.7010.0.58.71
1910.0.58.72/3010.0.58.73 – 10.0.58.7410.0.58.75
2010.0.58.76/3010.0.58.77 – 10.0.58.7810.0.58.79
2110.0.58.80/3010.0.58.81 – 10.0.58.8210.0.58.83
2210.0.58.84/3010.0.58.85 – 10.0.58.8610.0.58.87
2310.0.58.88/3010.0.58.89 – 10.0.58.9010.0.58.91
2410.0.58.92/3010.0.58.93 – 10.0.58.9410.0.58.95
2510.0.58.96/3010.0.58.97 – 10.0.58.9810.0.58.99
2610.0.58.100/3010.0.58.101 – 10.0.58.10210.0.58.103
2710.0.58.104/3010.0.58.105 – 10.0.58.10610.0.58.107
2810.0.58.108/3010.0.58.109 – 10.0.58.11010.0.58.111
2910.0.58.112/3010.0.58.113 – 10.0.58.11410.0.58.115
3010.0.58.116/3010.0.58.117 – 10.0.58.11810.0.58.119
3110.0.58.120/3010.0.58.121 – 10.0.58.12210.0.58.123
3210.0.58.124/3010.0.58.125 – 10.0.58.12610.0.58.127
3310.0.58.128/3010.0.58.129 – 10.0.58.13010.0.58.131
3410.0.58.132/3010.0.58.133 – 10.0.58.13410.0.58.135
3510.0.58.136/3010.0.58.137 – 10.0.58.13810.0.58.139
3610.0.58.140/3010.0.58.141 – 10.0.58.14210.0.58.143
3710.0.58.144/3010.0.58.145 – 10.0.58.14610.0.58.147
3810.0.58.148/3010.0.58.149 – 10.0.58.15010.0.58.151
3910.0.58.152/3010.0.58.153 – 10.0.58.15410.0.58.155
4010.0.58.156/3010.0.58.157 – 10.0.58.15810.0.58.159
4110.0.58.160/3010.0.58.161 – 10.0.58.16210.0.58.163
4210.0.58.164/3010.0.58.165 – 10.0.58.16610.0.58.167
4310.0.58.168/3010.0.58.169 – 10.0.58.17010.0.58.171
4410.0.58.172/3010.0.58.173 – 10.0.58.17410.0.58.175
4510.0.58.176/3010.0.58.177 – 10.0.58.17810.0.58.179
4610.0.58.180/3010.0.58.181 – 10.0.58.18210.0.58.183
4710.0.58.184/3010.0.58.185 – 10.0.58.18610.0.58.187
4810.0.58.188/3010.0.58.189 – 10.0.58.19010.0.58.191
4910.0.58.192/3010.0.58.193 – 10.0.58.19410.0.58.195
5010.0.58.196/3010.0.58.197 – 10.0.58.19810.0.58.199
5110.0.58.200/3010.0.58.201 – 10.0.58.20210.0.58.203
5210.0.58.204/3010.0.58.205 – 10.0.58.20610.0.58.207
5310.0.58.208/3010.0.58.209 – 10.0.58.21010.0.58.211
5410.0.58.212/3010.0.58.213 – 10.0.58.21410.0.58.215
5510.0.58.216/3010.0.58.217 – 10.0.58.21810.0.58.219
5610.0.58.220/3010.0.58.221 – 10.0.58.22210.0.58.223
5710.0.58.224/3010.0.58.225 – 10.0.58.22610.0.58.227
5810.0.58.228/3010.0.58.229 – 10.0.58.23010.0.58.231
5910.0.58.232/3010.0.58.233 – 10.0.58.23410.0.58.235
6010.0.58.236/3010.0.58.237 – 10.0.58.23810.0.58.239
6110.0.58.240/3010.0.58.241 – 10.0.58.24210.0.58.243
6210.0.58.244/3010.0.58.245 – 10.0.58.24610.0.58.247
6310.0.58.248/3010.0.58.249 – 10.0.58.25010.0.58.251
6410.0.58.252/3010.0.58.253 – 10.0.58.25410.0.58.255
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 →