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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)10.7.13.0/24
network10.7.13.0/24
broadcast10.7.13.255
first host10.7.13.1
last host10.7.13.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.7.13.0/24
address00001010.00000111.00001101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000111.00001101.00000000
broadcast00001010.00000111.00001101.11111111
green = network part, grey = host part
hex0x0a070d00
decimal168234240
reverse dns0.13.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:d00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.7.13.0/3010.7.13.1 – 10.7.13.210.7.13.3
210.7.13.4/3010.7.13.5 – 10.7.13.610.7.13.7
310.7.13.8/3010.7.13.9 – 10.7.13.1010.7.13.11
410.7.13.12/3010.7.13.13 – 10.7.13.1410.7.13.15
510.7.13.16/3010.7.13.17 – 10.7.13.1810.7.13.19
610.7.13.20/3010.7.13.21 – 10.7.13.2210.7.13.23
710.7.13.24/3010.7.13.25 – 10.7.13.2610.7.13.27
810.7.13.28/3010.7.13.29 – 10.7.13.3010.7.13.31
910.7.13.32/3010.7.13.33 – 10.7.13.3410.7.13.35
1010.7.13.36/3010.7.13.37 – 10.7.13.3810.7.13.39
1110.7.13.40/3010.7.13.41 – 10.7.13.4210.7.13.43
1210.7.13.44/3010.7.13.45 – 10.7.13.4610.7.13.47
1310.7.13.48/3010.7.13.49 – 10.7.13.5010.7.13.51
1410.7.13.52/3010.7.13.53 – 10.7.13.5410.7.13.55
1510.7.13.56/3010.7.13.57 – 10.7.13.5810.7.13.59
1610.7.13.60/3010.7.13.61 – 10.7.13.6210.7.13.63
1710.7.13.64/3010.7.13.65 – 10.7.13.6610.7.13.67
1810.7.13.68/3010.7.13.69 – 10.7.13.7010.7.13.71
1910.7.13.72/3010.7.13.73 – 10.7.13.7410.7.13.75
2010.7.13.76/3010.7.13.77 – 10.7.13.7810.7.13.79
2110.7.13.80/3010.7.13.81 – 10.7.13.8210.7.13.83
2210.7.13.84/3010.7.13.85 – 10.7.13.8610.7.13.87
2310.7.13.88/3010.7.13.89 – 10.7.13.9010.7.13.91
2410.7.13.92/3010.7.13.93 – 10.7.13.9410.7.13.95
2510.7.13.96/3010.7.13.97 – 10.7.13.9810.7.13.99
2610.7.13.100/3010.7.13.101 – 10.7.13.10210.7.13.103
2710.7.13.104/3010.7.13.105 – 10.7.13.10610.7.13.107
2810.7.13.108/3010.7.13.109 – 10.7.13.11010.7.13.111
2910.7.13.112/3010.7.13.113 – 10.7.13.11410.7.13.115
3010.7.13.116/3010.7.13.117 – 10.7.13.11810.7.13.119
3110.7.13.120/3010.7.13.121 – 10.7.13.12210.7.13.123
3210.7.13.124/3010.7.13.125 – 10.7.13.12610.7.13.127
3310.7.13.128/3010.7.13.129 – 10.7.13.13010.7.13.131
3410.7.13.132/3010.7.13.133 – 10.7.13.13410.7.13.135
3510.7.13.136/3010.7.13.137 – 10.7.13.13810.7.13.139
3610.7.13.140/3010.7.13.141 – 10.7.13.14210.7.13.143
3710.7.13.144/3010.7.13.145 – 10.7.13.14610.7.13.147
3810.7.13.148/3010.7.13.149 – 10.7.13.15010.7.13.151
3910.7.13.152/3010.7.13.153 – 10.7.13.15410.7.13.155
4010.7.13.156/3010.7.13.157 – 10.7.13.15810.7.13.159
4110.7.13.160/3010.7.13.161 – 10.7.13.16210.7.13.163
4210.7.13.164/3010.7.13.165 – 10.7.13.16610.7.13.167
4310.7.13.168/3010.7.13.169 – 10.7.13.17010.7.13.171
4410.7.13.172/3010.7.13.173 – 10.7.13.17410.7.13.175
4510.7.13.176/3010.7.13.177 – 10.7.13.17810.7.13.179
4610.7.13.180/3010.7.13.181 – 10.7.13.18210.7.13.183
4710.7.13.184/3010.7.13.185 – 10.7.13.18610.7.13.187
4810.7.13.188/3010.7.13.189 – 10.7.13.19010.7.13.191
4910.7.13.192/3010.7.13.193 – 10.7.13.19410.7.13.195
5010.7.13.196/3010.7.13.197 – 10.7.13.19810.7.13.199
5110.7.13.200/3010.7.13.201 – 10.7.13.20210.7.13.203
5210.7.13.204/3010.7.13.205 – 10.7.13.20610.7.13.207
5310.7.13.208/3010.7.13.209 – 10.7.13.21010.7.13.211
5410.7.13.212/3010.7.13.213 – 10.7.13.21410.7.13.215
5510.7.13.216/3010.7.13.217 – 10.7.13.21810.7.13.219
5610.7.13.220/3010.7.13.221 – 10.7.13.22210.7.13.223
5710.7.13.224/3010.7.13.225 – 10.7.13.22610.7.13.227
5810.7.13.228/3010.7.13.229 – 10.7.13.23010.7.13.231
5910.7.13.232/3010.7.13.233 – 10.7.13.23410.7.13.235
6010.7.13.236/3010.7.13.237 – 10.7.13.23810.7.13.239
6110.7.13.240/3010.7.13.241 – 10.7.13.24210.7.13.243
6210.7.13.244/3010.7.13.245 – 10.7.13.24610.7.13.247
6310.7.13.248/3010.7.13.249 – 10.7.13.25010.7.13.251
6410.7.13.252/3010.7.13.253 – 10.7.13.25410.7.13.255
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 →