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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)10.80.44.0/24
network10.80.44.0/24
broadcast10.80.44.255
first host10.80.44.1
last host10.80.44.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.80.44.0/24
address00001010.01010000.00101100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010000.00101100.00000000
broadcast00001010.01010000.00101100.11111111
green = network part, grey = host part
hex0x0a502c00
decimal173026304
reverse dns0.44.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:2c00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.80.44.0/3010.80.44.1 – 10.80.44.210.80.44.3
210.80.44.4/3010.80.44.5 – 10.80.44.610.80.44.7
310.80.44.8/3010.80.44.9 – 10.80.44.1010.80.44.11
410.80.44.12/3010.80.44.13 – 10.80.44.1410.80.44.15
510.80.44.16/3010.80.44.17 – 10.80.44.1810.80.44.19
610.80.44.20/3010.80.44.21 – 10.80.44.2210.80.44.23
710.80.44.24/3010.80.44.25 – 10.80.44.2610.80.44.27
810.80.44.28/3010.80.44.29 – 10.80.44.3010.80.44.31
910.80.44.32/3010.80.44.33 – 10.80.44.3410.80.44.35
1010.80.44.36/3010.80.44.37 – 10.80.44.3810.80.44.39
1110.80.44.40/3010.80.44.41 – 10.80.44.4210.80.44.43
1210.80.44.44/3010.80.44.45 – 10.80.44.4610.80.44.47
1310.80.44.48/3010.80.44.49 – 10.80.44.5010.80.44.51
1410.80.44.52/3010.80.44.53 – 10.80.44.5410.80.44.55
1510.80.44.56/3010.80.44.57 – 10.80.44.5810.80.44.59
1610.80.44.60/3010.80.44.61 – 10.80.44.6210.80.44.63
1710.80.44.64/3010.80.44.65 – 10.80.44.6610.80.44.67
1810.80.44.68/3010.80.44.69 – 10.80.44.7010.80.44.71
1910.80.44.72/3010.80.44.73 – 10.80.44.7410.80.44.75
2010.80.44.76/3010.80.44.77 – 10.80.44.7810.80.44.79
2110.80.44.80/3010.80.44.81 – 10.80.44.8210.80.44.83
2210.80.44.84/3010.80.44.85 – 10.80.44.8610.80.44.87
2310.80.44.88/3010.80.44.89 – 10.80.44.9010.80.44.91
2410.80.44.92/3010.80.44.93 – 10.80.44.9410.80.44.95
2510.80.44.96/3010.80.44.97 – 10.80.44.9810.80.44.99
2610.80.44.100/3010.80.44.101 – 10.80.44.10210.80.44.103
2710.80.44.104/3010.80.44.105 – 10.80.44.10610.80.44.107
2810.80.44.108/3010.80.44.109 – 10.80.44.11010.80.44.111
2910.80.44.112/3010.80.44.113 – 10.80.44.11410.80.44.115
3010.80.44.116/3010.80.44.117 – 10.80.44.11810.80.44.119
3110.80.44.120/3010.80.44.121 – 10.80.44.12210.80.44.123
3210.80.44.124/3010.80.44.125 – 10.80.44.12610.80.44.127
3310.80.44.128/3010.80.44.129 – 10.80.44.13010.80.44.131
3410.80.44.132/3010.80.44.133 – 10.80.44.13410.80.44.135
3510.80.44.136/3010.80.44.137 – 10.80.44.13810.80.44.139
3610.80.44.140/3010.80.44.141 – 10.80.44.14210.80.44.143
3710.80.44.144/3010.80.44.145 – 10.80.44.14610.80.44.147
3810.80.44.148/3010.80.44.149 – 10.80.44.15010.80.44.151
3910.80.44.152/3010.80.44.153 – 10.80.44.15410.80.44.155
4010.80.44.156/3010.80.44.157 – 10.80.44.15810.80.44.159
4110.80.44.160/3010.80.44.161 – 10.80.44.16210.80.44.163
4210.80.44.164/3010.80.44.165 – 10.80.44.16610.80.44.167
4310.80.44.168/3010.80.44.169 – 10.80.44.17010.80.44.171
4410.80.44.172/3010.80.44.173 – 10.80.44.17410.80.44.175
4510.80.44.176/3010.80.44.177 – 10.80.44.17810.80.44.179
4610.80.44.180/3010.80.44.181 – 10.80.44.18210.80.44.183
4710.80.44.184/3010.80.44.185 – 10.80.44.18610.80.44.187
4810.80.44.188/3010.80.44.189 – 10.80.44.19010.80.44.191
4910.80.44.192/3010.80.44.193 – 10.80.44.19410.80.44.195
5010.80.44.196/3010.80.44.197 – 10.80.44.19810.80.44.199
5110.80.44.200/3010.80.44.201 – 10.80.44.20210.80.44.203
5210.80.44.204/3010.80.44.205 – 10.80.44.20610.80.44.207
5310.80.44.208/3010.80.44.209 – 10.80.44.21010.80.44.211
5410.80.44.212/3010.80.44.213 – 10.80.44.21410.80.44.215
5510.80.44.216/3010.80.44.217 – 10.80.44.21810.80.44.219
5610.80.44.220/3010.80.44.221 – 10.80.44.22210.80.44.223
5710.80.44.224/3010.80.44.225 – 10.80.44.22610.80.44.227
5810.80.44.228/3010.80.44.229 – 10.80.44.23010.80.44.231
5910.80.44.232/3010.80.44.233 – 10.80.44.23410.80.44.235
6010.80.44.236/3010.80.44.237 – 10.80.44.23810.80.44.239
6110.80.44.240/3010.80.44.241 – 10.80.44.24210.80.44.243
6210.80.44.244/3010.80.44.245 – 10.80.44.24610.80.44.247
6310.80.44.248/3010.80.44.249 – 10.80.44.25010.80.44.251
6410.80.44.252/3010.80.44.253 – 10.80.44.25410.80.44.255
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 →