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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)10.4.252.0/24
network10.4.252.0/24
broadcast10.4.252.255
first host10.4.252.1
last host10.4.252.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.4.252.0/24
address00001010.00000100.11111100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000100.11111100.00000000
broadcast00001010.00000100.11111100.11111111
green = network part, grey = host part
hex0x0a04fc00
decimal168098816
reverse dns0.252.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:fc00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.252.0/3010.4.252.1 – 10.4.252.210.4.252.3
210.4.252.4/3010.4.252.5 – 10.4.252.610.4.252.7
310.4.252.8/3010.4.252.9 – 10.4.252.1010.4.252.11
410.4.252.12/3010.4.252.13 – 10.4.252.1410.4.252.15
510.4.252.16/3010.4.252.17 – 10.4.252.1810.4.252.19
610.4.252.20/3010.4.252.21 – 10.4.252.2210.4.252.23
710.4.252.24/3010.4.252.25 – 10.4.252.2610.4.252.27
810.4.252.28/3010.4.252.29 – 10.4.252.3010.4.252.31
910.4.252.32/3010.4.252.33 – 10.4.252.3410.4.252.35
1010.4.252.36/3010.4.252.37 – 10.4.252.3810.4.252.39
1110.4.252.40/3010.4.252.41 – 10.4.252.4210.4.252.43
1210.4.252.44/3010.4.252.45 – 10.4.252.4610.4.252.47
1310.4.252.48/3010.4.252.49 – 10.4.252.5010.4.252.51
1410.4.252.52/3010.4.252.53 – 10.4.252.5410.4.252.55
1510.4.252.56/3010.4.252.57 – 10.4.252.5810.4.252.59
1610.4.252.60/3010.4.252.61 – 10.4.252.6210.4.252.63
1710.4.252.64/3010.4.252.65 – 10.4.252.6610.4.252.67
1810.4.252.68/3010.4.252.69 – 10.4.252.7010.4.252.71
1910.4.252.72/3010.4.252.73 – 10.4.252.7410.4.252.75
2010.4.252.76/3010.4.252.77 – 10.4.252.7810.4.252.79
2110.4.252.80/3010.4.252.81 – 10.4.252.8210.4.252.83
2210.4.252.84/3010.4.252.85 – 10.4.252.8610.4.252.87
2310.4.252.88/3010.4.252.89 – 10.4.252.9010.4.252.91
2410.4.252.92/3010.4.252.93 – 10.4.252.9410.4.252.95
2510.4.252.96/3010.4.252.97 – 10.4.252.9810.4.252.99
2610.4.252.100/3010.4.252.101 – 10.4.252.10210.4.252.103
2710.4.252.104/3010.4.252.105 – 10.4.252.10610.4.252.107
2810.4.252.108/3010.4.252.109 – 10.4.252.11010.4.252.111
2910.4.252.112/3010.4.252.113 – 10.4.252.11410.4.252.115
3010.4.252.116/3010.4.252.117 – 10.4.252.11810.4.252.119
3110.4.252.120/3010.4.252.121 – 10.4.252.12210.4.252.123
3210.4.252.124/3010.4.252.125 – 10.4.252.12610.4.252.127
3310.4.252.128/3010.4.252.129 – 10.4.252.13010.4.252.131
3410.4.252.132/3010.4.252.133 – 10.4.252.13410.4.252.135
3510.4.252.136/3010.4.252.137 – 10.4.252.13810.4.252.139
3610.4.252.140/3010.4.252.141 – 10.4.252.14210.4.252.143
3710.4.252.144/3010.4.252.145 – 10.4.252.14610.4.252.147
3810.4.252.148/3010.4.252.149 – 10.4.252.15010.4.252.151
3910.4.252.152/3010.4.252.153 – 10.4.252.15410.4.252.155
4010.4.252.156/3010.4.252.157 – 10.4.252.15810.4.252.159
4110.4.252.160/3010.4.252.161 – 10.4.252.16210.4.252.163
4210.4.252.164/3010.4.252.165 – 10.4.252.16610.4.252.167
4310.4.252.168/3010.4.252.169 – 10.4.252.17010.4.252.171
4410.4.252.172/3010.4.252.173 – 10.4.252.17410.4.252.175
4510.4.252.176/3010.4.252.177 – 10.4.252.17810.4.252.179
4610.4.252.180/3010.4.252.181 – 10.4.252.18210.4.252.183
4710.4.252.184/3010.4.252.185 – 10.4.252.18610.4.252.187
4810.4.252.188/3010.4.252.189 – 10.4.252.19010.4.252.191
4910.4.252.192/3010.4.252.193 – 10.4.252.19410.4.252.195
5010.4.252.196/3010.4.252.197 – 10.4.252.19810.4.252.199
5110.4.252.200/3010.4.252.201 – 10.4.252.20210.4.252.203
5210.4.252.204/3010.4.252.205 – 10.4.252.20610.4.252.207
5310.4.252.208/3010.4.252.209 – 10.4.252.21010.4.252.211
5410.4.252.212/3010.4.252.213 – 10.4.252.21410.4.252.215
5510.4.252.216/3010.4.252.217 – 10.4.252.21810.4.252.219
5610.4.252.220/3010.4.252.221 – 10.4.252.22210.4.252.223
5710.4.252.224/3010.4.252.225 – 10.4.252.22610.4.252.227
5810.4.252.228/3010.4.252.229 – 10.4.252.23010.4.252.231
5910.4.252.232/3010.4.252.233 – 10.4.252.23410.4.252.235
6010.4.252.236/3010.4.252.237 – 10.4.252.23810.4.252.239
6110.4.252.240/3010.4.252.241 – 10.4.252.24210.4.252.243
6210.4.252.244/3010.4.252.245 – 10.4.252.24610.4.252.247
6310.4.252.248/3010.4.252.249 – 10.4.252.25010.4.252.251
6410.4.252.252/3010.4.252.253 – 10.4.252.25410.4.252.255
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 →