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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)10.65.162.0/24
network10.65.162.0/24
broadcast10.65.162.255
first host10.65.162.1
last host10.65.162.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.65.162.0/24
address00001010.01000001.10100010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01000001.10100010.00000000
broadcast00001010.01000001.10100010.11111111
green = network part, grey = host part
hex0x0a41a200
decimal172073472
reverse dns0.162.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:a200

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.65.162.0/3010.65.162.1 – 10.65.162.210.65.162.3
210.65.162.4/3010.65.162.5 – 10.65.162.610.65.162.7
310.65.162.8/3010.65.162.9 – 10.65.162.1010.65.162.11
410.65.162.12/3010.65.162.13 – 10.65.162.1410.65.162.15
510.65.162.16/3010.65.162.17 – 10.65.162.1810.65.162.19
610.65.162.20/3010.65.162.21 – 10.65.162.2210.65.162.23
710.65.162.24/3010.65.162.25 – 10.65.162.2610.65.162.27
810.65.162.28/3010.65.162.29 – 10.65.162.3010.65.162.31
910.65.162.32/3010.65.162.33 – 10.65.162.3410.65.162.35
1010.65.162.36/3010.65.162.37 – 10.65.162.3810.65.162.39
1110.65.162.40/3010.65.162.41 – 10.65.162.4210.65.162.43
1210.65.162.44/3010.65.162.45 – 10.65.162.4610.65.162.47
1310.65.162.48/3010.65.162.49 – 10.65.162.5010.65.162.51
1410.65.162.52/3010.65.162.53 – 10.65.162.5410.65.162.55
1510.65.162.56/3010.65.162.57 – 10.65.162.5810.65.162.59
1610.65.162.60/3010.65.162.61 – 10.65.162.6210.65.162.63
1710.65.162.64/3010.65.162.65 – 10.65.162.6610.65.162.67
1810.65.162.68/3010.65.162.69 – 10.65.162.7010.65.162.71
1910.65.162.72/3010.65.162.73 – 10.65.162.7410.65.162.75
2010.65.162.76/3010.65.162.77 – 10.65.162.7810.65.162.79
2110.65.162.80/3010.65.162.81 – 10.65.162.8210.65.162.83
2210.65.162.84/3010.65.162.85 – 10.65.162.8610.65.162.87
2310.65.162.88/3010.65.162.89 – 10.65.162.9010.65.162.91
2410.65.162.92/3010.65.162.93 – 10.65.162.9410.65.162.95
2510.65.162.96/3010.65.162.97 – 10.65.162.9810.65.162.99
2610.65.162.100/3010.65.162.101 – 10.65.162.10210.65.162.103
2710.65.162.104/3010.65.162.105 – 10.65.162.10610.65.162.107
2810.65.162.108/3010.65.162.109 – 10.65.162.11010.65.162.111
2910.65.162.112/3010.65.162.113 – 10.65.162.11410.65.162.115
3010.65.162.116/3010.65.162.117 – 10.65.162.11810.65.162.119
3110.65.162.120/3010.65.162.121 – 10.65.162.12210.65.162.123
3210.65.162.124/3010.65.162.125 – 10.65.162.12610.65.162.127
3310.65.162.128/3010.65.162.129 – 10.65.162.13010.65.162.131
3410.65.162.132/3010.65.162.133 – 10.65.162.13410.65.162.135
3510.65.162.136/3010.65.162.137 – 10.65.162.13810.65.162.139
3610.65.162.140/3010.65.162.141 – 10.65.162.14210.65.162.143
3710.65.162.144/3010.65.162.145 – 10.65.162.14610.65.162.147
3810.65.162.148/3010.65.162.149 – 10.65.162.15010.65.162.151
3910.65.162.152/3010.65.162.153 – 10.65.162.15410.65.162.155
4010.65.162.156/3010.65.162.157 – 10.65.162.15810.65.162.159
4110.65.162.160/3010.65.162.161 – 10.65.162.16210.65.162.163
4210.65.162.164/3010.65.162.165 – 10.65.162.16610.65.162.167
4310.65.162.168/3010.65.162.169 – 10.65.162.17010.65.162.171
4410.65.162.172/3010.65.162.173 – 10.65.162.17410.65.162.175
4510.65.162.176/3010.65.162.177 – 10.65.162.17810.65.162.179
4610.65.162.180/3010.65.162.181 – 10.65.162.18210.65.162.183
4710.65.162.184/3010.65.162.185 – 10.65.162.18610.65.162.187
4810.65.162.188/3010.65.162.189 – 10.65.162.19010.65.162.191
4910.65.162.192/3010.65.162.193 – 10.65.162.19410.65.162.195
5010.65.162.196/3010.65.162.197 – 10.65.162.19810.65.162.199
5110.65.162.200/3010.65.162.201 – 10.65.162.20210.65.162.203
5210.65.162.204/3010.65.162.205 – 10.65.162.20610.65.162.207
5310.65.162.208/3010.65.162.209 – 10.65.162.21010.65.162.211
5410.65.162.212/3010.65.162.213 – 10.65.162.21410.65.162.215
5510.65.162.216/3010.65.162.217 – 10.65.162.21810.65.162.219
5610.65.162.220/3010.65.162.221 – 10.65.162.22210.65.162.223
5710.65.162.224/3010.65.162.225 – 10.65.162.22610.65.162.227
5810.65.162.228/3010.65.162.229 – 10.65.162.23010.65.162.231
5910.65.162.232/3010.65.162.233 – 10.65.162.23410.65.162.235
6010.65.162.236/3010.65.162.237 – 10.65.162.23810.65.162.239
6110.65.162.240/3010.65.162.241 – 10.65.162.24210.65.162.243
6210.65.162.244/3010.65.162.245 – 10.65.162.24610.65.162.247
6310.65.162.248/3010.65.162.249 – 10.65.162.25010.65.162.251
6410.65.162.252/3010.65.162.253 – 10.65.162.25410.65.162.255
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 →