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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)10.85.97.0/24
network10.85.97.0/24
broadcast10.85.97.255
first host10.85.97.1
last host10.85.97.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.85.97.0/24
address00001010.01010101.01100001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010101.01100001.00000000
broadcast00001010.01010101.01100001.11111111
green = network part, grey = host part
hex0x0a556100
decimal173367552
reverse dns0.97.85.10.in-addr.arpa
ipv4-mapped::ffff:a55:6100

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.85.97.0/3010.85.97.1 – 10.85.97.210.85.97.3
210.85.97.4/3010.85.97.5 – 10.85.97.610.85.97.7
310.85.97.8/3010.85.97.9 – 10.85.97.1010.85.97.11
410.85.97.12/3010.85.97.13 – 10.85.97.1410.85.97.15
510.85.97.16/3010.85.97.17 – 10.85.97.1810.85.97.19
610.85.97.20/3010.85.97.21 – 10.85.97.2210.85.97.23
710.85.97.24/3010.85.97.25 – 10.85.97.2610.85.97.27
810.85.97.28/3010.85.97.29 – 10.85.97.3010.85.97.31
910.85.97.32/3010.85.97.33 – 10.85.97.3410.85.97.35
1010.85.97.36/3010.85.97.37 – 10.85.97.3810.85.97.39
1110.85.97.40/3010.85.97.41 – 10.85.97.4210.85.97.43
1210.85.97.44/3010.85.97.45 – 10.85.97.4610.85.97.47
1310.85.97.48/3010.85.97.49 – 10.85.97.5010.85.97.51
1410.85.97.52/3010.85.97.53 – 10.85.97.5410.85.97.55
1510.85.97.56/3010.85.97.57 – 10.85.97.5810.85.97.59
1610.85.97.60/3010.85.97.61 – 10.85.97.6210.85.97.63
1710.85.97.64/3010.85.97.65 – 10.85.97.6610.85.97.67
1810.85.97.68/3010.85.97.69 – 10.85.97.7010.85.97.71
1910.85.97.72/3010.85.97.73 – 10.85.97.7410.85.97.75
2010.85.97.76/3010.85.97.77 – 10.85.97.7810.85.97.79
2110.85.97.80/3010.85.97.81 – 10.85.97.8210.85.97.83
2210.85.97.84/3010.85.97.85 – 10.85.97.8610.85.97.87
2310.85.97.88/3010.85.97.89 – 10.85.97.9010.85.97.91
2410.85.97.92/3010.85.97.93 – 10.85.97.9410.85.97.95
2510.85.97.96/3010.85.97.97 – 10.85.97.9810.85.97.99
2610.85.97.100/3010.85.97.101 – 10.85.97.10210.85.97.103
2710.85.97.104/3010.85.97.105 – 10.85.97.10610.85.97.107
2810.85.97.108/3010.85.97.109 – 10.85.97.11010.85.97.111
2910.85.97.112/3010.85.97.113 – 10.85.97.11410.85.97.115
3010.85.97.116/3010.85.97.117 – 10.85.97.11810.85.97.119
3110.85.97.120/3010.85.97.121 – 10.85.97.12210.85.97.123
3210.85.97.124/3010.85.97.125 – 10.85.97.12610.85.97.127
3310.85.97.128/3010.85.97.129 – 10.85.97.13010.85.97.131
3410.85.97.132/3010.85.97.133 – 10.85.97.13410.85.97.135
3510.85.97.136/3010.85.97.137 – 10.85.97.13810.85.97.139
3610.85.97.140/3010.85.97.141 – 10.85.97.14210.85.97.143
3710.85.97.144/3010.85.97.145 – 10.85.97.14610.85.97.147
3810.85.97.148/3010.85.97.149 – 10.85.97.15010.85.97.151
3910.85.97.152/3010.85.97.153 – 10.85.97.15410.85.97.155
4010.85.97.156/3010.85.97.157 – 10.85.97.15810.85.97.159
4110.85.97.160/3010.85.97.161 – 10.85.97.16210.85.97.163
4210.85.97.164/3010.85.97.165 – 10.85.97.16610.85.97.167
4310.85.97.168/3010.85.97.169 – 10.85.97.17010.85.97.171
4410.85.97.172/3010.85.97.173 – 10.85.97.17410.85.97.175
4510.85.97.176/3010.85.97.177 – 10.85.97.17810.85.97.179
4610.85.97.180/3010.85.97.181 – 10.85.97.18210.85.97.183
4710.85.97.184/3010.85.97.185 – 10.85.97.18610.85.97.187
4810.85.97.188/3010.85.97.189 – 10.85.97.19010.85.97.191
4910.85.97.192/3010.85.97.193 – 10.85.97.19410.85.97.195
5010.85.97.196/3010.85.97.197 – 10.85.97.19810.85.97.199
5110.85.97.200/3010.85.97.201 – 10.85.97.20210.85.97.203
5210.85.97.204/3010.85.97.205 – 10.85.97.20610.85.97.207
5310.85.97.208/3010.85.97.209 – 10.85.97.21010.85.97.211
5410.85.97.212/3010.85.97.213 – 10.85.97.21410.85.97.215
5510.85.97.216/3010.85.97.217 – 10.85.97.21810.85.97.219
5610.85.97.220/3010.85.97.221 – 10.85.97.22210.85.97.223
5710.85.97.224/3010.85.97.225 – 10.85.97.22610.85.97.227
5810.85.97.228/3010.85.97.229 – 10.85.97.23010.85.97.231
5910.85.97.232/3010.85.97.233 – 10.85.97.23410.85.97.235
6010.85.97.236/3010.85.97.237 – 10.85.97.23810.85.97.239
6110.85.97.240/3010.85.97.241 – 10.85.97.24210.85.97.243
6210.85.97.244/3010.85.97.245 – 10.85.97.24610.85.97.247
6310.85.97.248/3010.85.97.249 – 10.85.97.25010.85.97.251
6410.85.97.252/3010.85.97.253 – 10.85.97.25410.85.97.255
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 →