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)10.0.104.0/23
network10.0.104.0/23
broadcast10.0.105.255
first host10.0.104.1
last host10.0.105.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.0.104.0/23
address00001010.00000000.01101000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000000.01101000.00000000
broadcast00001010.00000000.01101001.11111111
green = network part, grey = host part
hex0x0a006800
decimal167798784
reverse dns0.104.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:6800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.104.0/3010.0.104.1 – 10.0.104.210.0.104.3
210.0.104.4/3010.0.104.5 – 10.0.104.610.0.104.7
310.0.104.8/3010.0.104.9 – 10.0.104.1010.0.104.11
410.0.104.12/3010.0.104.13 – 10.0.104.1410.0.104.15
510.0.104.16/3010.0.104.17 – 10.0.104.1810.0.104.19
610.0.104.20/3010.0.104.21 – 10.0.104.2210.0.104.23
710.0.104.24/3010.0.104.25 – 10.0.104.2610.0.104.27
810.0.104.28/3010.0.104.29 – 10.0.104.3010.0.104.31
910.0.104.32/3010.0.104.33 – 10.0.104.3410.0.104.35
1010.0.104.36/3010.0.104.37 – 10.0.104.3810.0.104.39
1110.0.104.40/3010.0.104.41 – 10.0.104.4210.0.104.43
1210.0.104.44/3010.0.104.45 – 10.0.104.4610.0.104.47
1310.0.104.48/3010.0.104.49 – 10.0.104.5010.0.104.51
1410.0.104.52/3010.0.104.53 – 10.0.104.5410.0.104.55
1510.0.104.56/3010.0.104.57 – 10.0.104.5810.0.104.59
1610.0.104.60/3010.0.104.61 – 10.0.104.6210.0.104.63
1710.0.104.64/3010.0.104.65 – 10.0.104.6610.0.104.67
1810.0.104.68/3010.0.104.69 – 10.0.104.7010.0.104.71
1910.0.104.72/3010.0.104.73 – 10.0.104.7410.0.104.75
2010.0.104.76/3010.0.104.77 – 10.0.104.7810.0.104.79
2110.0.104.80/3010.0.104.81 – 10.0.104.8210.0.104.83
2210.0.104.84/3010.0.104.85 – 10.0.104.8610.0.104.87
2310.0.104.88/3010.0.104.89 – 10.0.104.9010.0.104.91
2410.0.104.92/3010.0.104.93 – 10.0.104.9410.0.104.95
2510.0.104.96/3010.0.104.97 – 10.0.104.9810.0.104.99
2610.0.104.100/3010.0.104.101 – 10.0.104.10210.0.104.103
2710.0.104.104/3010.0.104.105 – 10.0.104.10610.0.104.107
2810.0.104.108/3010.0.104.109 – 10.0.104.11010.0.104.111
2910.0.104.112/3010.0.104.113 – 10.0.104.11410.0.104.115
3010.0.104.116/3010.0.104.117 – 10.0.104.11810.0.104.119
3110.0.104.120/3010.0.104.121 – 10.0.104.12210.0.104.123
3210.0.104.124/3010.0.104.125 – 10.0.104.12610.0.104.127
3310.0.104.128/3010.0.104.129 – 10.0.104.13010.0.104.131
3410.0.104.132/3010.0.104.133 – 10.0.104.13410.0.104.135
3510.0.104.136/3010.0.104.137 – 10.0.104.13810.0.104.139
3610.0.104.140/3010.0.104.141 – 10.0.104.14210.0.104.143
3710.0.104.144/3010.0.104.145 – 10.0.104.14610.0.104.147
3810.0.104.148/3010.0.104.149 – 10.0.104.15010.0.104.151
3910.0.104.152/3010.0.104.153 – 10.0.104.15410.0.104.155
4010.0.104.156/3010.0.104.157 – 10.0.104.15810.0.104.159
4110.0.104.160/3010.0.104.161 – 10.0.104.16210.0.104.163
4210.0.104.164/3010.0.104.165 – 10.0.104.16610.0.104.167
4310.0.104.168/3010.0.104.169 – 10.0.104.17010.0.104.171
4410.0.104.172/3010.0.104.173 – 10.0.104.17410.0.104.175
4510.0.104.176/3010.0.104.177 – 10.0.104.17810.0.104.179
4610.0.104.180/3010.0.104.181 – 10.0.104.18210.0.104.183
4710.0.104.184/3010.0.104.185 – 10.0.104.18610.0.104.187
4810.0.104.188/3010.0.104.189 – 10.0.104.19010.0.104.191
4910.0.104.192/3010.0.104.193 – 10.0.104.19410.0.104.195
5010.0.104.196/3010.0.104.197 – 10.0.104.19810.0.104.199
5110.0.104.200/3010.0.104.201 – 10.0.104.20210.0.104.203
5210.0.104.204/3010.0.104.205 – 10.0.104.20610.0.104.207
5310.0.104.208/3010.0.104.209 – 10.0.104.21010.0.104.211
5410.0.104.212/3010.0.104.213 – 10.0.104.21410.0.104.215
5510.0.104.216/3010.0.104.217 – 10.0.104.21810.0.104.219
5610.0.104.220/3010.0.104.221 – 10.0.104.22210.0.104.223
5710.0.104.224/3010.0.104.225 – 10.0.104.22610.0.104.227
5810.0.104.228/3010.0.104.229 – 10.0.104.23010.0.104.231
5910.0.104.232/3010.0.104.233 – 10.0.104.23410.0.104.235
6010.0.104.236/3010.0.104.237 – 10.0.104.23810.0.104.239
6110.0.104.240/3010.0.104.241 – 10.0.104.24210.0.104.243
6210.0.104.244/3010.0.104.245 – 10.0.104.24610.0.104.247
6310.0.104.248/3010.0.104.249 – 10.0.104.25010.0.104.251
6410.0.104.252/3010.0.104.253 – 10.0.104.25410.0.104.255
6510.0.105.0/3010.0.105.1 – 10.0.105.210.0.105.3
6610.0.105.4/3010.0.105.5 – 10.0.105.610.0.105.7
6710.0.105.8/3010.0.105.9 – 10.0.105.1010.0.105.11
6810.0.105.12/3010.0.105.13 – 10.0.105.1410.0.105.15
6910.0.105.16/3010.0.105.17 – 10.0.105.1810.0.105.19
7010.0.105.20/3010.0.105.21 – 10.0.105.2210.0.105.23
7110.0.105.24/3010.0.105.25 – 10.0.105.2610.0.105.27
7210.0.105.28/3010.0.105.29 – 10.0.105.3010.0.105.31
7310.0.105.32/3010.0.105.33 – 10.0.105.3410.0.105.35
7410.0.105.36/3010.0.105.37 – 10.0.105.3810.0.105.39
7510.0.105.40/3010.0.105.41 – 10.0.105.4210.0.105.43
7610.0.105.44/3010.0.105.45 – 10.0.105.4610.0.105.47
7710.0.105.48/3010.0.105.49 – 10.0.105.5010.0.105.51
7810.0.105.52/3010.0.105.53 – 10.0.105.5410.0.105.55
7910.0.105.56/3010.0.105.57 – 10.0.105.5810.0.105.59
8010.0.105.60/3010.0.105.61 – 10.0.105.6210.0.105.63
8110.0.105.64/3010.0.105.65 – 10.0.105.6610.0.105.67
8210.0.105.68/3010.0.105.69 – 10.0.105.7010.0.105.71
8310.0.105.72/3010.0.105.73 – 10.0.105.7410.0.105.75
8410.0.105.76/3010.0.105.77 – 10.0.105.7810.0.105.79
8510.0.105.80/3010.0.105.81 – 10.0.105.8210.0.105.83
8610.0.105.84/3010.0.105.85 – 10.0.105.8610.0.105.87
8710.0.105.88/3010.0.105.89 – 10.0.105.9010.0.105.91
8810.0.105.92/3010.0.105.93 – 10.0.105.9410.0.105.95
8910.0.105.96/3010.0.105.97 – 10.0.105.9810.0.105.99
9010.0.105.100/3010.0.105.101 – 10.0.105.10210.0.105.103
9110.0.105.104/3010.0.105.105 – 10.0.105.10610.0.105.107
9210.0.105.108/3010.0.105.109 – 10.0.105.11010.0.105.111
9310.0.105.112/3010.0.105.113 – 10.0.105.11410.0.105.115
9410.0.105.116/3010.0.105.117 – 10.0.105.11810.0.105.119
9510.0.105.120/3010.0.105.121 – 10.0.105.12210.0.105.123
9610.0.105.124/3010.0.105.125 – 10.0.105.12610.0.105.127
9710.0.105.128/3010.0.105.129 – 10.0.105.13010.0.105.131
9810.0.105.132/3010.0.105.133 – 10.0.105.13410.0.105.135
9910.0.105.136/3010.0.105.137 – 10.0.105.13810.0.105.139
10010.0.105.140/3010.0.105.141 – 10.0.105.14210.0.105.143
10110.0.105.144/3010.0.105.145 – 10.0.105.14610.0.105.147
10210.0.105.148/3010.0.105.149 – 10.0.105.15010.0.105.151
10310.0.105.152/3010.0.105.153 – 10.0.105.15410.0.105.155
10410.0.105.156/3010.0.105.157 – 10.0.105.15810.0.105.159
10510.0.105.160/3010.0.105.161 – 10.0.105.16210.0.105.163
10610.0.105.164/3010.0.105.165 – 10.0.105.16610.0.105.167
10710.0.105.168/3010.0.105.169 – 10.0.105.17010.0.105.171
10810.0.105.172/3010.0.105.173 – 10.0.105.17410.0.105.175
10910.0.105.176/3010.0.105.177 – 10.0.105.17810.0.105.179
11010.0.105.180/3010.0.105.181 – 10.0.105.18210.0.105.183
11110.0.105.184/3010.0.105.185 – 10.0.105.18610.0.105.187
11210.0.105.188/3010.0.105.189 – 10.0.105.19010.0.105.191
11310.0.105.192/3010.0.105.193 – 10.0.105.19410.0.105.195
11410.0.105.196/3010.0.105.197 – 10.0.105.19810.0.105.199
11510.0.105.200/3010.0.105.201 – 10.0.105.20210.0.105.203
11610.0.105.204/3010.0.105.205 – 10.0.105.20610.0.105.207
11710.0.105.208/3010.0.105.209 – 10.0.105.21010.0.105.211
11810.0.105.212/3010.0.105.213 – 10.0.105.21410.0.105.215
11910.0.105.216/3010.0.105.217 – 10.0.105.21810.0.105.219
12010.0.105.220/3010.0.105.221 – 10.0.105.22210.0.105.223
12110.0.105.224/3010.0.105.225 – 10.0.105.22610.0.105.227
12210.0.105.228/3010.0.105.229 – 10.0.105.23010.0.105.231
12310.0.105.232/3010.0.105.233 – 10.0.105.23410.0.105.235
12410.0.105.236/3010.0.105.237 – 10.0.105.23810.0.105.239
12510.0.105.240/3010.0.105.241 – 10.0.105.24210.0.105.243
12610.0.105.244/3010.0.105.245 – 10.0.105.24610.0.105.247
12710.0.105.248/3010.0.105.249 – 10.0.105.25010.0.105.251
12810.0.105.252/3010.0.105.253 – 10.0.105.25410.0.105.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /23
/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-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →