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)10.85.154.0/24
network10.85.154.0/24
broadcast10.85.154.255
first host10.85.154.1
last host10.85.154.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.85.154.0/24
address00001010.01010101.10011010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010101.10011010.00000000
broadcast00001010.01010101.10011010.11111111
green = network part, grey = host part
hex0x0a559a00
decimal173382144
reverse dns0.154.85.10.in-addr.arpa
ipv4-mapped::ffff:a55:9a00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.85.154.0/3010.85.154.1 – 10.85.154.210.85.154.3
210.85.154.4/3010.85.154.5 – 10.85.154.610.85.154.7
310.85.154.8/3010.85.154.9 – 10.85.154.1010.85.154.11
410.85.154.12/3010.85.154.13 – 10.85.154.1410.85.154.15
510.85.154.16/3010.85.154.17 – 10.85.154.1810.85.154.19
610.85.154.20/3010.85.154.21 – 10.85.154.2210.85.154.23
710.85.154.24/3010.85.154.25 – 10.85.154.2610.85.154.27
810.85.154.28/3010.85.154.29 – 10.85.154.3010.85.154.31
910.85.154.32/3010.85.154.33 – 10.85.154.3410.85.154.35
1010.85.154.36/3010.85.154.37 – 10.85.154.3810.85.154.39
1110.85.154.40/3010.85.154.41 – 10.85.154.4210.85.154.43
1210.85.154.44/3010.85.154.45 – 10.85.154.4610.85.154.47
1310.85.154.48/3010.85.154.49 – 10.85.154.5010.85.154.51
1410.85.154.52/3010.85.154.53 – 10.85.154.5410.85.154.55
1510.85.154.56/3010.85.154.57 – 10.85.154.5810.85.154.59
1610.85.154.60/3010.85.154.61 – 10.85.154.6210.85.154.63
1710.85.154.64/3010.85.154.65 – 10.85.154.6610.85.154.67
1810.85.154.68/3010.85.154.69 – 10.85.154.7010.85.154.71
1910.85.154.72/3010.85.154.73 – 10.85.154.7410.85.154.75
2010.85.154.76/3010.85.154.77 – 10.85.154.7810.85.154.79
2110.85.154.80/3010.85.154.81 – 10.85.154.8210.85.154.83
2210.85.154.84/3010.85.154.85 – 10.85.154.8610.85.154.87
2310.85.154.88/3010.85.154.89 – 10.85.154.9010.85.154.91
2410.85.154.92/3010.85.154.93 – 10.85.154.9410.85.154.95
2510.85.154.96/3010.85.154.97 – 10.85.154.9810.85.154.99
2610.85.154.100/3010.85.154.101 – 10.85.154.10210.85.154.103
2710.85.154.104/3010.85.154.105 – 10.85.154.10610.85.154.107
2810.85.154.108/3010.85.154.109 – 10.85.154.11010.85.154.111
2910.85.154.112/3010.85.154.113 – 10.85.154.11410.85.154.115
3010.85.154.116/3010.85.154.117 – 10.85.154.11810.85.154.119
3110.85.154.120/3010.85.154.121 – 10.85.154.12210.85.154.123
3210.85.154.124/3010.85.154.125 – 10.85.154.12610.85.154.127
3310.85.154.128/3010.85.154.129 – 10.85.154.13010.85.154.131
3410.85.154.132/3010.85.154.133 – 10.85.154.13410.85.154.135
3510.85.154.136/3010.85.154.137 – 10.85.154.13810.85.154.139
3610.85.154.140/3010.85.154.141 – 10.85.154.14210.85.154.143
3710.85.154.144/3010.85.154.145 – 10.85.154.14610.85.154.147
3810.85.154.148/3010.85.154.149 – 10.85.154.15010.85.154.151
3910.85.154.152/3010.85.154.153 – 10.85.154.15410.85.154.155
4010.85.154.156/3010.85.154.157 – 10.85.154.15810.85.154.159
4110.85.154.160/3010.85.154.161 – 10.85.154.16210.85.154.163
4210.85.154.164/3010.85.154.165 – 10.85.154.16610.85.154.167
4310.85.154.168/3010.85.154.169 – 10.85.154.17010.85.154.171
4410.85.154.172/3010.85.154.173 – 10.85.154.17410.85.154.175
4510.85.154.176/3010.85.154.177 – 10.85.154.17810.85.154.179
4610.85.154.180/3010.85.154.181 – 10.85.154.18210.85.154.183
4710.85.154.184/3010.85.154.185 – 10.85.154.18610.85.154.187
4810.85.154.188/3010.85.154.189 – 10.85.154.19010.85.154.191
4910.85.154.192/3010.85.154.193 – 10.85.154.19410.85.154.195
5010.85.154.196/3010.85.154.197 – 10.85.154.19810.85.154.199
5110.85.154.200/3010.85.154.201 – 10.85.154.20210.85.154.203
5210.85.154.204/3010.85.154.205 – 10.85.154.20610.85.154.207
5310.85.154.208/3010.85.154.209 – 10.85.154.21010.85.154.211
5410.85.154.212/3010.85.154.213 – 10.85.154.21410.85.154.215
5510.85.154.216/3010.85.154.217 – 10.85.154.21810.85.154.219
5610.85.154.220/3010.85.154.221 – 10.85.154.22210.85.154.223
5710.85.154.224/3010.85.154.225 – 10.85.154.22610.85.154.227
5810.85.154.228/3010.85.154.229 – 10.85.154.23010.85.154.231
5910.85.154.232/3010.85.154.233 – 10.85.154.23410.85.154.235
6010.85.154.236/3010.85.154.237 – 10.85.154.23810.85.154.239
6110.85.154.240/3010.85.154.241 – 10.85.154.24210.85.154.243
6210.85.154.244/3010.85.154.245 – 10.85.154.24610.85.154.247
6310.85.154.248/3010.85.154.249 – 10.85.154.25010.85.154.251
6410.85.154.252/3010.85.154.253 – 10.85.154.25410.85.154.255
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 →