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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)10.57.167.0/24
network10.57.167.0/24
broadcast10.57.167.255
first host10.57.167.1
last host10.57.167.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.57.167.0/24
address00001010.00111001.10100111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00111001.10100111.00000000
broadcast00001010.00111001.10100111.11111111
green = network part, grey = host part
hex0x0a39a700
decimal171550464
reverse dns0.167.57.10.in-addr.arpa
ipv4-mapped::ffff:a39:a700

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.57.167.0/3010.57.167.1 – 10.57.167.210.57.167.3
210.57.167.4/3010.57.167.5 – 10.57.167.610.57.167.7
310.57.167.8/3010.57.167.9 – 10.57.167.1010.57.167.11
410.57.167.12/3010.57.167.13 – 10.57.167.1410.57.167.15
510.57.167.16/3010.57.167.17 – 10.57.167.1810.57.167.19
610.57.167.20/3010.57.167.21 – 10.57.167.2210.57.167.23
710.57.167.24/3010.57.167.25 – 10.57.167.2610.57.167.27
810.57.167.28/3010.57.167.29 – 10.57.167.3010.57.167.31
910.57.167.32/3010.57.167.33 – 10.57.167.3410.57.167.35
1010.57.167.36/3010.57.167.37 – 10.57.167.3810.57.167.39
1110.57.167.40/3010.57.167.41 – 10.57.167.4210.57.167.43
1210.57.167.44/3010.57.167.45 – 10.57.167.4610.57.167.47
1310.57.167.48/3010.57.167.49 – 10.57.167.5010.57.167.51
1410.57.167.52/3010.57.167.53 – 10.57.167.5410.57.167.55
1510.57.167.56/3010.57.167.57 – 10.57.167.5810.57.167.59
1610.57.167.60/3010.57.167.61 – 10.57.167.6210.57.167.63
1710.57.167.64/3010.57.167.65 – 10.57.167.6610.57.167.67
1810.57.167.68/3010.57.167.69 – 10.57.167.7010.57.167.71
1910.57.167.72/3010.57.167.73 – 10.57.167.7410.57.167.75
2010.57.167.76/3010.57.167.77 – 10.57.167.7810.57.167.79
2110.57.167.80/3010.57.167.81 – 10.57.167.8210.57.167.83
2210.57.167.84/3010.57.167.85 – 10.57.167.8610.57.167.87
2310.57.167.88/3010.57.167.89 – 10.57.167.9010.57.167.91
2410.57.167.92/3010.57.167.93 – 10.57.167.9410.57.167.95
2510.57.167.96/3010.57.167.97 – 10.57.167.9810.57.167.99
2610.57.167.100/3010.57.167.101 – 10.57.167.10210.57.167.103
2710.57.167.104/3010.57.167.105 – 10.57.167.10610.57.167.107
2810.57.167.108/3010.57.167.109 – 10.57.167.11010.57.167.111
2910.57.167.112/3010.57.167.113 – 10.57.167.11410.57.167.115
3010.57.167.116/3010.57.167.117 – 10.57.167.11810.57.167.119
3110.57.167.120/3010.57.167.121 – 10.57.167.12210.57.167.123
3210.57.167.124/3010.57.167.125 – 10.57.167.12610.57.167.127
3310.57.167.128/3010.57.167.129 – 10.57.167.13010.57.167.131
3410.57.167.132/3010.57.167.133 – 10.57.167.13410.57.167.135
3510.57.167.136/3010.57.167.137 – 10.57.167.13810.57.167.139
3610.57.167.140/3010.57.167.141 – 10.57.167.14210.57.167.143
3710.57.167.144/3010.57.167.145 – 10.57.167.14610.57.167.147
3810.57.167.148/3010.57.167.149 – 10.57.167.15010.57.167.151
3910.57.167.152/3010.57.167.153 – 10.57.167.15410.57.167.155
4010.57.167.156/3010.57.167.157 – 10.57.167.15810.57.167.159
4110.57.167.160/3010.57.167.161 – 10.57.167.16210.57.167.163
4210.57.167.164/3010.57.167.165 – 10.57.167.16610.57.167.167
4310.57.167.168/3010.57.167.169 – 10.57.167.17010.57.167.171
4410.57.167.172/3010.57.167.173 – 10.57.167.17410.57.167.175
4510.57.167.176/3010.57.167.177 – 10.57.167.17810.57.167.179
4610.57.167.180/3010.57.167.181 – 10.57.167.18210.57.167.183
4710.57.167.184/3010.57.167.185 – 10.57.167.18610.57.167.187
4810.57.167.188/3010.57.167.189 – 10.57.167.19010.57.167.191
4910.57.167.192/3010.57.167.193 – 10.57.167.19410.57.167.195
5010.57.167.196/3010.57.167.197 – 10.57.167.19810.57.167.199
5110.57.167.200/3010.57.167.201 – 10.57.167.20210.57.167.203
5210.57.167.204/3010.57.167.205 – 10.57.167.20610.57.167.207
5310.57.167.208/3010.57.167.209 – 10.57.167.21010.57.167.211
5410.57.167.212/3010.57.167.213 – 10.57.167.21410.57.167.215
5510.57.167.216/3010.57.167.217 – 10.57.167.21810.57.167.219
5610.57.167.220/3010.57.167.221 – 10.57.167.22210.57.167.223
5710.57.167.224/3010.57.167.225 – 10.57.167.22610.57.167.227
5810.57.167.228/3010.57.167.229 – 10.57.167.23010.57.167.231
5910.57.167.232/3010.57.167.233 – 10.57.167.23410.57.167.235
6010.57.167.236/3010.57.167.237 – 10.57.167.23810.57.167.239
6110.57.167.240/3010.57.167.241 – 10.57.167.24210.57.167.243
6210.57.167.244/3010.57.167.245 – 10.57.167.24610.57.167.247
6310.57.167.248/3010.57.167.249 – 10.57.167.25010.57.167.251
6410.57.167.252/3010.57.167.253 – 10.57.167.25410.57.167.255
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 →