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)10.37.158.0/24
network10.37.158.0/24
broadcast10.37.158.255
first host10.37.158.1
last host10.37.158.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.37.158.0/24
address00001010.00100101.10011110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00100101.10011110.00000000
broadcast00001010.00100101.10011110.11111111
green = network part, grey = host part
hex0x0a259e00
decimal170237440
reverse dns0.158.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:9e00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.37.158.0/3010.37.158.1 – 10.37.158.210.37.158.3
210.37.158.4/3010.37.158.5 – 10.37.158.610.37.158.7
310.37.158.8/3010.37.158.9 – 10.37.158.1010.37.158.11
410.37.158.12/3010.37.158.13 – 10.37.158.1410.37.158.15
510.37.158.16/3010.37.158.17 – 10.37.158.1810.37.158.19
610.37.158.20/3010.37.158.21 – 10.37.158.2210.37.158.23
710.37.158.24/3010.37.158.25 – 10.37.158.2610.37.158.27
810.37.158.28/3010.37.158.29 – 10.37.158.3010.37.158.31
910.37.158.32/3010.37.158.33 – 10.37.158.3410.37.158.35
1010.37.158.36/3010.37.158.37 – 10.37.158.3810.37.158.39
1110.37.158.40/3010.37.158.41 – 10.37.158.4210.37.158.43
1210.37.158.44/3010.37.158.45 – 10.37.158.4610.37.158.47
1310.37.158.48/3010.37.158.49 – 10.37.158.5010.37.158.51
1410.37.158.52/3010.37.158.53 – 10.37.158.5410.37.158.55
1510.37.158.56/3010.37.158.57 – 10.37.158.5810.37.158.59
1610.37.158.60/3010.37.158.61 – 10.37.158.6210.37.158.63
1710.37.158.64/3010.37.158.65 – 10.37.158.6610.37.158.67
1810.37.158.68/3010.37.158.69 – 10.37.158.7010.37.158.71
1910.37.158.72/3010.37.158.73 – 10.37.158.7410.37.158.75
2010.37.158.76/3010.37.158.77 – 10.37.158.7810.37.158.79
2110.37.158.80/3010.37.158.81 – 10.37.158.8210.37.158.83
2210.37.158.84/3010.37.158.85 – 10.37.158.8610.37.158.87
2310.37.158.88/3010.37.158.89 – 10.37.158.9010.37.158.91
2410.37.158.92/3010.37.158.93 – 10.37.158.9410.37.158.95
2510.37.158.96/3010.37.158.97 – 10.37.158.9810.37.158.99
2610.37.158.100/3010.37.158.101 – 10.37.158.10210.37.158.103
2710.37.158.104/3010.37.158.105 – 10.37.158.10610.37.158.107
2810.37.158.108/3010.37.158.109 – 10.37.158.11010.37.158.111
2910.37.158.112/3010.37.158.113 – 10.37.158.11410.37.158.115
3010.37.158.116/3010.37.158.117 – 10.37.158.11810.37.158.119
3110.37.158.120/3010.37.158.121 – 10.37.158.12210.37.158.123
3210.37.158.124/3010.37.158.125 – 10.37.158.12610.37.158.127
3310.37.158.128/3010.37.158.129 – 10.37.158.13010.37.158.131
3410.37.158.132/3010.37.158.133 – 10.37.158.13410.37.158.135
3510.37.158.136/3010.37.158.137 – 10.37.158.13810.37.158.139
3610.37.158.140/3010.37.158.141 – 10.37.158.14210.37.158.143
3710.37.158.144/3010.37.158.145 – 10.37.158.14610.37.158.147
3810.37.158.148/3010.37.158.149 – 10.37.158.15010.37.158.151
3910.37.158.152/3010.37.158.153 – 10.37.158.15410.37.158.155
4010.37.158.156/3010.37.158.157 – 10.37.158.15810.37.158.159
4110.37.158.160/3010.37.158.161 – 10.37.158.16210.37.158.163
4210.37.158.164/3010.37.158.165 – 10.37.158.16610.37.158.167
4310.37.158.168/3010.37.158.169 – 10.37.158.17010.37.158.171
4410.37.158.172/3010.37.158.173 – 10.37.158.17410.37.158.175
4510.37.158.176/3010.37.158.177 – 10.37.158.17810.37.158.179
4610.37.158.180/3010.37.158.181 – 10.37.158.18210.37.158.183
4710.37.158.184/3010.37.158.185 – 10.37.158.18610.37.158.187
4810.37.158.188/3010.37.158.189 – 10.37.158.19010.37.158.191
4910.37.158.192/3010.37.158.193 – 10.37.158.19410.37.158.195
5010.37.158.196/3010.37.158.197 – 10.37.158.19810.37.158.199
5110.37.158.200/3010.37.158.201 – 10.37.158.20210.37.158.203
5210.37.158.204/3010.37.158.205 – 10.37.158.20610.37.158.207
5310.37.158.208/3010.37.158.209 – 10.37.158.21010.37.158.211
5410.37.158.212/3010.37.158.213 – 10.37.158.21410.37.158.215
5510.37.158.216/3010.37.158.217 – 10.37.158.21810.37.158.219
5610.37.158.220/3010.37.158.221 – 10.37.158.22210.37.158.223
5710.37.158.224/3010.37.158.225 – 10.37.158.22610.37.158.227
5810.37.158.228/3010.37.158.229 – 10.37.158.23010.37.158.231
5910.37.158.232/3010.37.158.233 – 10.37.158.23410.37.158.235
6010.37.158.236/3010.37.158.237 – 10.37.158.23810.37.158.239
6110.37.158.240/3010.37.158.241 – 10.37.158.24210.37.158.243
6210.37.158.244/3010.37.158.245 – 10.37.158.24610.37.158.247
6310.37.158.248/3010.37.158.249 – 10.37.158.25010.37.158.251
6410.37.158.252/3010.37.158.253 – 10.37.158.25410.37.158.255
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 →