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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)10.45.46.0/24
network10.45.46.0/24
broadcast10.45.46.255
first host10.45.46.1
last host10.45.46.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.45.46.0/24
address00001010.00101101.00101110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00101101.00101110.00000000
broadcast00001010.00101101.00101110.11111111
green = network part, grey = host part
hex0x0a2d2e00
decimal170733056
reverse dns0.46.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:2e00

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.45.46.0/3010.45.46.1 – 10.45.46.210.45.46.3
210.45.46.4/3010.45.46.5 – 10.45.46.610.45.46.7
310.45.46.8/3010.45.46.9 – 10.45.46.1010.45.46.11
410.45.46.12/3010.45.46.13 – 10.45.46.1410.45.46.15
510.45.46.16/3010.45.46.17 – 10.45.46.1810.45.46.19
610.45.46.20/3010.45.46.21 – 10.45.46.2210.45.46.23
710.45.46.24/3010.45.46.25 – 10.45.46.2610.45.46.27
810.45.46.28/3010.45.46.29 – 10.45.46.3010.45.46.31
910.45.46.32/3010.45.46.33 – 10.45.46.3410.45.46.35
1010.45.46.36/3010.45.46.37 – 10.45.46.3810.45.46.39
1110.45.46.40/3010.45.46.41 – 10.45.46.4210.45.46.43
1210.45.46.44/3010.45.46.45 – 10.45.46.4610.45.46.47
1310.45.46.48/3010.45.46.49 – 10.45.46.5010.45.46.51
1410.45.46.52/3010.45.46.53 – 10.45.46.5410.45.46.55
1510.45.46.56/3010.45.46.57 – 10.45.46.5810.45.46.59
1610.45.46.60/3010.45.46.61 – 10.45.46.6210.45.46.63
1710.45.46.64/3010.45.46.65 – 10.45.46.6610.45.46.67
1810.45.46.68/3010.45.46.69 – 10.45.46.7010.45.46.71
1910.45.46.72/3010.45.46.73 – 10.45.46.7410.45.46.75
2010.45.46.76/3010.45.46.77 – 10.45.46.7810.45.46.79
2110.45.46.80/3010.45.46.81 – 10.45.46.8210.45.46.83
2210.45.46.84/3010.45.46.85 – 10.45.46.8610.45.46.87
2310.45.46.88/3010.45.46.89 – 10.45.46.9010.45.46.91
2410.45.46.92/3010.45.46.93 – 10.45.46.9410.45.46.95
2510.45.46.96/3010.45.46.97 – 10.45.46.9810.45.46.99
2610.45.46.100/3010.45.46.101 – 10.45.46.10210.45.46.103
2710.45.46.104/3010.45.46.105 – 10.45.46.10610.45.46.107
2810.45.46.108/3010.45.46.109 – 10.45.46.11010.45.46.111
2910.45.46.112/3010.45.46.113 – 10.45.46.11410.45.46.115
3010.45.46.116/3010.45.46.117 – 10.45.46.11810.45.46.119
3110.45.46.120/3010.45.46.121 – 10.45.46.12210.45.46.123
3210.45.46.124/3010.45.46.125 – 10.45.46.12610.45.46.127
3310.45.46.128/3010.45.46.129 – 10.45.46.13010.45.46.131
3410.45.46.132/3010.45.46.133 – 10.45.46.13410.45.46.135
3510.45.46.136/3010.45.46.137 – 10.45.46.13810.45.46.139
3610.45.46.140/3010.45.46.141 – 10.45.46.14210.45.46.143
3710.45.46.144/3010.45.46.145 – 10.45.46.14610.45.46.147
3810.45.46.148/3010.45.46.149 – 10.45.46.15010.45.46.151
3910.45.46.152/3010.45.46.153 – 10.45.46.15410.45.46.155
4010.45.46.156/3010.45.46.157 – 10.45.46.15810.45.46.159
4110.45.46.160/3010.45.46.161 – 10.45.46.16210.45.46.163
4210.45.46.164/3010.45.46.165 – 10.45.46.16610.45.46.167
4310.45.46.168/3010.45.46.169 – 10.45.46.17010.45.46.171
4410.45.46.172/3010.45.46.173 – 10.45.46.17410.45.46.175
4510.45.46.176/3010.45.46.177 – 10.45.46.17810.45.46.179
4610.45.46.180/3010.45.46.181 – 10.45.46.18210.45.46.183
4710.45.46.184/3010.45.46.185 – 10.45.46.18610.45.46.187
4810.45.46.188/3010.45.46.189 – 10.45.46.19010.45.46.191
4910.45.46.192/3010.45.46.193 – 10.45.46.19410.45.46.195
5010.45.46.196/3010.45.46.197 – 10.45.46.19810.45.46.199
5110.45.46.200/3010.45.46.201 – 10.45.46.20210.45.46.203
5210.45.46.204/3010.45.46.205 – 10.45.46.20610.45.46.207
5310.45.46.208/3010.45.46.209 – 10.45.46.21010.45.46.211
5410.45.46.212/3010.45.46.213 – 10.45.46.21410.45.46.215
5510.45.46.216/3010.45.46.217 – 10.45.46.21810.45.46.219
5610.45.46.220/3010.45.46.221 – 10.45.46.22210.45.46.223
5710.45.46.224/3010.45.46.225 – 10.45.46.22610.45.46.227
5810.45.46.228/3010.45.46.229 – 10.45.46.23010.45.46.231
5910.45.46.232/3010.45.46.233 – 10.45.46.23410.45.46.235
6010.45.46.236/3010.45.46.237 – 10.45.46.23810.45.46.239
6110.45.46.240/3010.45.46.241 – 10.45.46.24210.45.46.243
6210.45.46.244/3010.45.46.245 – 10.45.46.24610.45.46.247
6310.45.46.248/3010.45.46.249 – 10.45.46.25010.45.46.251
6410.45.46.252/3010.45.46.253 – 10.45.46.25410.45.46.255
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 →