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)10.45.145.0/24
network10.45.145.0/24
broadcast10.45.145.255
first host10.45.145.1
last host10.45.145.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.45.145.0/24
address00001010.00101101.10010001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00101101.10010001.00000000
broadcast00001010.00101101.10010001.11111111
green = network part, grey = host part
hex0x0a2d9100
decimal170758400
reverse dns0.145.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:9100

/24 split into /30 · 64 subnets

close ×
#networkhost rangebroadcast
110.45.145.0/3010.45.145.1 – 10.45.145.210.45.145.3
210.45.145.4/3010.45.145.5 – 10.45.145.610.45.145.7
310.45.145.8/3010.45.145.9 – 10.45.145.1010.45.145.11
410.45.145.12/3010.45.145.13 – 10.45.145.1410.45.145.15
510.45.145.16/3010.45.145.17 – 10.45.145.1810.45.145.19
610.45.145.20/3010.45.145.21 – 10.45.145.2210.45.145.23
710.45.145.24/3010.45.145.25 – 10.45.145.2610.45.145.27
810.45.145.28/3010.45.145.29 – 10.45.145.3010.45.145.31
910.45.145.32/3010.45.145.33 – 10.45.145.3410.45.145.35
1010.45.145.36/3010.45.145.37 – 10.45.145.3810.45.145.39
1110.45.145.40/3010.45.145.41 – 10.45.145.4210.45.145.43
1210.45.145.44/3010.45.145.45 – 10.45.145.4610.45.145.47
1310.45.145.48/3010.45.145.49 – 10.45.145.5010.45.145.51
1410.45.145.52/3010.45.145.53 – 10.45.145.5410.45.145.55
1510.45.145.56/3010.45.145.57 – 10.45.145.5810.45.145.59
1610.45.145.60/3010.45.145.61 – 10.45.145.6210.45.145.63
1710.45.145.64/3010.45.145.65 – 10.45.145.6610.45.145.67
1810.45.145.68/3010.45.145.69 – 10.45.145.7010.45.145.71
1910.45.145.72/3010.45.145.73 – 10.45.145.7410.45.145.75
2010.45.145.76/3010.45.145.77 – 10.45.145.7810.45.145.79
2110.45.145.80/3010.45.145.81 – 10.45.145.8210.45.145.83
2210.45.145.84/3010.45.145.85 – 10.45.145.8610.45.145.87
2310.45.145.88/3010.45.145.89 – 10.45.145.9010.45.145.91
2410.45.145.92/3010.45.145.93 – 10.45.145.9410.45.145.95
2510.45.145.96/3010.45.145.97 – 10.45.145.9810.45.145.99
2610.45.145.100/3010.45.145.101 – 10.45.145.10210.45.145.103
2710.45.145.104/3010.45.145.105 – 10.45.145.10610.45.145.107
2810.45.145.108/3010.45.145.109 – 10.45.145.11010.45.145.111
2910.45.145.112/3010.45.145.113 – 10.45.145.11410.45.145.115
3010.45.145.116/3010.45.145.117 – 10.45.145.11810.45.145.119
3110.45.145.120/3010.45.145.121 – 10.45.145.12210.45.145.123
3210.45.145.124/3010.45.145.125 – 10.45.145.12610.45.145.127
3310.45.145.128/3010.45.145.129 – 10.45.145.13010.45.145.131
3410.45.145.132/3010.45.145.133 – 10.45.145.13410.45.145.135
3510.45.145.136/3010.45.145.137 – 10.45.145.13810.45.145.139
3610.45.145.140/3010.45.145.141 – 10.45.145.14210.45.145.143
3710.45.145.144/3010.45.145.145 – 10.45.145.14610.45.145.147
3810.45.145.148/3010.45.145.149 – 10.45.145.15010.45.145.151
3910.45.145.152/3010.45.145.153 – 10.45.145.15410.45.145.155
4010.45.145.156/3010.45.145.157 – 10.45.145.15810.45.145.159
4110.45.145.160/3010.45.145.161 – 10.45.145.16210.45.145.163
4210.45.145.164/3010.45.145.165 – 10.45.145.16610.45.145.167
4310.45.145.168/3010.45.145.169 – 10.45.145.17010.45.145.171
4410.45.145.172/3010.45.145.173 – 10.45.145.17410.45.145.175
4510.45.145.176/3010.45.145.177 – 10.45.145.17810.45.145.179
4610.45.145.180/3010.45.145.181 – 10.45.145.18210.45.145.183
4710.45.145.184/3010.45.145.185 – 10.45.145.18610.45.145.187
4810.45.145.188/3010.45.145.189 – 10.45.145.19010.45.145.191
4910.45.145.192/3010.45.145.193 – 10.45.145.19410.45.145.195
5010.45.145.196/3010.45.145.197 – 10.45.145.19810.45.145.199
5110.45.145.200/3010.45.145.201 – 10.45.145.20210.45.145.203
5210.45.145.204/3010.45.145.205 – 10.45.145.20610.45.145.207
5310.45.145.208/3010.45.145.209 – 10.45.145.21010.45.145.211
5410.45.145.212/3010.45.145.213 – 10.45.145.21410.45.145.215
5510.45.145.216/3010.45.145.217 – 10.45.145.21810.45.145.219
5610.45.145.220/3010.45.145.221 – 10.45.145.22210.45.145.223
5710.45.145.224/3010.45.145.225 – 10.45.145.22610.45.145.227
5810.45.145.228/3010.45.145.229 – 10.45.145.23010.45.145.231
5910.45.145.232/3010.45.145.233 – 10.45.145.23410.45.145.235
6010.45.145.236/3010.45.145.237 – 10.45.145.23810.45.145.239
6110.45.145.240/3010.45.145.241 – 10.45.145.24210.45.145.243
6210.45.145.244/3010.45.145.245 – 10.45.145.24610.45.145.247
6310.45.145.248/3010.45.145.249 – 10.45.145.25010.45.145.251
6410.45.145.252/3010.45.145.253 – 10.45.145.25410.45.145.255
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 →