ip
ipku.in

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)10.167.129.0/24
network10.167.129.0/24
broadcast10.167.129.255
first host10.167.129.1
last host10.167.129.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.167.129.0/24
address00001010.10100111.10000001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10100111.10000001.00000000
broadcast00001010.10100111.10000001.11111111
green = network part, grey = host part
hex0x0aa78100
decimal178749696
reverse dns0.129.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:8100

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.129.0/3010.167.129.1 – 10.167.129.210.167.129.3
210.167.129.4/3010.167.129.5 – 10.167.129.610.167.129.7
310.167.129.8/3010.167.129.9 – 10.167.129.1010.167.129.11
410.167.129.12/3010.167.129.13 – 10.167.129.1410.167.129.15
510.167.129.16/3010.167.129.17 – 10.167.129.1810.167.129.19
610.167.129.20/3010.167.129.21 – 10.167.129.2210.167.129.23
710.167.129.24/3010.167.129.25 – 10.167.129.2610.167.129.27
810.167.129.28/3010.167.129.29 – 10.167.129.3010.167.129.31
910.167.129.32/3010.167.129.33 – 10.167.129.3410.167.129.35
1010.167.129.36/3010.167.129.37 – 10.167.129.3810.167.129.39
1110.167.129.40/3010.167.129.41 – 10.167.129.4210.167.129.43
1210.167.129.44/3010.167.129.45 – 10.167.129.4610.167.129.47
1310.167.129.48/3010.167.129.49 – 10.167.129.5010.167.129.51
1410.167.129.52/3010.167.129.53 – 10.167.129.5410.167.129.55
1510.167.129.56/3010.167.129.57 – 10.167.129.5810.167.129.59
1610.167.129.60/3010.167.129.61 – 10.167.129.6210.167.129.63
1710.167.129.64/3010.167.129.65 – 10.167.129.6610.167.129.67
1810.167.129.68/3010.167.129.69 – 10.167.129.7010.167.129.71
1910.167.129.72/3010.167.129.73 – 10.167.129.7410.167.129.75
2010.167.129.76/3010.167.129.77 – 10.167.129.7810.167.129.79
2110.167.129.80/3010.167.129.81 – 10.167.129.8210.167.129.83
2210.167.129.84/3010.167.129.85 – 10.167.129.8610.167.129.87
2310.167.129.88/3010.167.129.89 – 10.167.129.9010.167.129.91
2410.167.129.92/3010.167.129.93 – 10.167.129.9410.167.129.95
2510.167.129.96/3010.167.129.97 – 10.167.129.9810.167.129.99
2610.167.129.100/3010.167.129.101 – 10.167.129.10210.167.129.103
2710.167.129.104/3010.167.129.105 – 10.167.129.10610.167.129.107
2810.167.129.108/3010.167.129.109 – 10.167.129.11010.167.129.111
2910.167.129.112/3010.167.129.113 – 10.167.129.11410.167.129.115
3010.167.129.116/3010.167.129.117 – 10.167.129.11810.167.129.119
3110.167.129.120/3010.167.129.121 – 10.167.129.12210.167.129.123
3210.167.129.124/3010.167.129.125 – 10.167.129.12610.167.129.127
3310.167.129.128/3010.167.129.129 – 10.167.129.13010.167.129.131
3410.167.129.132/3010.167.129.133 – 10.167.129.13410.167.129.135
3510.167.129.136/3010.167.129.137 – 10.167.129.13810.167.129.139
3610.167.129.140/3010.167.129.141 – 10.167.129.14210.167.129.143
3710.167.129.144/3010.167.129.145 – 10.167.129.14610.167.129.147
3810.167.129.148/3010.167.129.149 – 10.167.129.15010.167.129.151
3910.167.129.152/3010.167.129.153 – 10.167.129.15410.167.129.155
4010.167.129.156/3010.167.129.157 – 10.167.129.15810.167.129.159
4110.167.129.160/3010.167.129.161 – 10.167.129.16210.167.129.163
4210.167.129.164/3010.167.129.165 – 10.167.129.16610.167.129.167
4310.167.129.168/3010.167.129.169 – 10.167.129.17010.167.129.171
4410.167.129.172/3010.167.129.173 – 10.167.129.17410.167.129.175
4510.167.129.176/3010.167.129.177 – 10.167.129.17810.167.129.179
4610.167.129.180/3010.167.129.181 – 10.167.129.18210.167.129.183
4710.167.129.184/3010.167.129.185 – 10.167.129.18610.167.129.187
4810.167.129.188/3010.167.129.189 – 10.167.129.19010.167.129.191
4910.167.129.192/3010.167.129.193 – 10.167.129.19410.167.129.195
5010.167.129.196/3010.167.129.197 – 10.167.129.19810.167.129.199
5110.167.129.200/3010.167.129.201 – 10.167.129.20210.167.129.203
5210.167.129.204/3010.167.129.205 – 10.167.129.20610.167.129.207
5310.167.129.208/3010.167.129.209 – 10.167.129.21010.167.129.211
5410.167.129.212/3010.167.129.213 – 10.167.129.21410.167.129.215
5510.167.129.216/3010.167.129.217 – 10.167.129.21810.167.129.219
5610.167.129.220/3010.167.129.221 – 10.167.129.22210.167.129.223
5710.167.129.224/3010.167.129.225 – 10.167.129.22610.167.129.227
5810.167.129.228/3010.167.129.229 – 10.167.129.23010.167.129.231
5910.167.129.232/3010.167.129.233 – 10.167.129.23410.167.129.235
6010.167.129.236/3010.167.129.237 – 10.167.129.23810.167.129.239
6110.167.129.240/3010.167.129.241 – 10.167.129.24210.167.129.243
6210.167.129.244/3010.167.129.245 – 10.167.129.24610.167.129.247
6310.167.129.248/3010.167.129.249 – 10.167.129.25010.167.129.251
6410.167.129.252/3010.167.129.253 – 10.167.129.25410.167.129.255
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 →