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)10.201.0.0/23
network10.201.0.0/23
broadcast10.201.1.255
first host10.201.0.1
last host10.201.1.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.201.0.0/23
address00001010.11001001.00000000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11001001.00000000.00000000
broadcast00001010.11001001.00000001.11111111
green = network part, grey = host part
hex0x0ac90000
decimal180944896
reverse dns0.0.201.10.in-addr.arpa
ipv4-mapped::ffff:ac9:0

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.201.0.0/3010.201.0.1 – 10.201.0.210.201.0.3
210.201.0.4/3010.201.0.5 – 10.201.0.610.201.0.7
310.201.0.8/3010.201.0.9 – 10.201.0.1010.201.0.11
410.201.0.12/3010.201.0.13 – 10.201.0.1410.201.0.15
510.201.0.16/3010.201.0.17 – 10.201.0.1810.201.0.19
610.201.0.20/3010.201.0.21 – 10.201.0.2210.201.0.23
710.201.0.24/3010.201.0.25 – 10.201.0.2610.201.0.27
810.201.0.28/3010.201.0.29 – 10.201.0.3010.201.0.31
910.201.0.32/3010.201.0.33 – 10.201.0.3410.201.0.35
1010.201.0.36/3010.201.0.37 – 10.201.0.3810.201.0.39
1110.201.0.40/3010.201.0.41 – 10.201.0.4210.201.0.43
1210.201.0.44/3010.201.0.45 – 10.201.0.4610.201.0.47
1310.201.0.48/3010.201.0.49 – 10.201.0.5010.201.0.51
1410.201.0.52/3010.201.0.53 – 10.201.0.5410.201.0.55
1510.201.0.56/3010.201.0.57 – 10.201.0.5810.201.0.59
1610.201.0.60/3010.201.0.61 – 10.201.0.6210.201.0.63
1710.201.0.64/3010.201.0.65 – 10.201.0.6610.201.0.67
1810.201.0.68/3010.201.0.69 – 10.201.0.7010.201.0.71
1910.201.0.72/3010.201.0.73 – 10.201.0.7410.201.0.75
2010.201.0.76/3010.201.0.77 – 10.201.0.7810.201.0.79
2110.201.0.80/3010.201.0.81 – 10.201.0.8210.201.0.83
2210.201.0.84/3010.201.0.85 – 10.201.0.8610.201.0.87
2310.201.0.88/3010.201.0.89 – 10.201.0.9010.201.0.91
2410.201.0.92/3010.201.0.93 – 10.201.0.9410.201.0.95
2510.201.0.96/3010.201.0.97 – 10.201.0.9810.201.0.99
2610.201.0.100/3010.201.0.101 – 10.201.0.10210.201.0.103
2710.201.0.104/3010.201.0.105 – 10.201.0.10610.201.0.107
2810.201.0.108/3010.201.0.109 – 10.201.0.11010.201.0.111
2910.201.0.112/3010.201.0.113 – 10.201.0.11410.201.0.115
3010.201.0.116/3010.201.0.117 – 10.201.0.11810.201.0.119
3110.201.0.120/3010.201.0.121 – 10.201.0.12210.201.0.123
3210.201.0.124/3010.201.0.125 – 10.201.0.12610.201.0.127
3310.201.0.128/3010.201.0.129 – 10.201.0.13010.201.0.131
3410.201.0.132/3010.201.0.133 – 10.201.0.13410.201.0.135
3510.201.0.136/3010.201.0.137 – 10.201.0.13810.201.0.139
3610.201.0.140/3010.201.0.141 – 10.201.0.14210.201.0.143
3710.201.0.144/3010.201.0.145 – 10.201.0.14610.201.0.147
3810.201.0.148/3010.201.0.149 – 10.201.0.15010.201.0.151
3910.201.0.152/3010.201.0.153 – 10.201.0.15410.201.0.155
4010.201.0.156/3010.201.0.157 – 10.201.0.15810.201.0.159
4110.201.0.160/3010.201.0.161 – 10.201.0.16210.201.0.163
4210.201.0.164/3010.201.0.165 – 10.201.0.16610.201.0.167
4310.201.0.168/3010.201.0.169 – 10.201.0.17010.201.0.171
4410.201.0.172/3010.201.0.173 – 10.201.0.17410.201.0.175
4510.201.0.176/3010.201.0.177 – 10.201.0.17810.201.0.179
4610.201.0.180/3010.201.0.181 – 10.201.0.18210.201.0.183
4710.201.0.184/3010.201.0.185 – 10.201.0.18610.201.0.187
4810.201.0.188/3010.201.0.189 – 10.201.0.19010.201.0.191
4910.201.0.192/3010.201.0.193 – 10.201.0.19410.201.0.195
5010.201.0.196/3010.201.0.197 – 10.201.0.19810.201.0.199
5110.201.0.200/3010.201.0.201 – 10.201.0.20210.201.0.203
5210.201.0.204/3010.201.0.205 – 10.201.0.20610.201.0.207
5310.201.0.208/3010.201.0.209 – 10.201.0.21010.201.0.211
5410.201.0.212/3010.201.0.213 – 10.201.0.21410.201.0.215
5510.201.0.216/3010.201.0.217 – 10.201.0.21810.201.0.219
5610.201.0.220/3010.201.0.221 – 10.201.0.22210.201.0.223
5710.201.0.224/3010.201.0.225 – 10.201.0.22610.201.0.227
5810.201.0.228/3010.201.0.229 – 10.201.0.23010.201.0.231
5910.201.0.232/3010.201.0.233 – 10.201.0.23410.201.0.235
6010.201.0.236/3010.201.0.237 – 10.201.0.23810.201.0.239
6110.201.0.240/3010.201.0.241 – 10.201.0.24210.201.0.243
6210.201.0.244/3010.201.0.245 – 10.201.0.24610.201.0.247
6310.201.0.248/3010.201.0.249 – 10.201.0.25010.201.0.251
6410.201.0.252/3010.201.0.253 – 10.201.0.25410.201.0.255
6510.201.1.0/3010.201.1.1 – 10.201.1.210.201.1.3
6610.201.1.4/3010.201.1.5 – 10.201.1.610.201.1.7
6710.201.1.8/3010.201.1.9 – 10.201.1.1010.201.1.11
6810.201.1.12/3010.201.1.13 – 10.201.1.1410.201.1.15
6910.201.1.16/3010.201.1.17 – 10.201.1.1810.201.1.19
7010.201.1.20/3010.201.1.21 – 10.201.1.2210.201.1.23
7110.201.1.24/3010.201.1.25 – 10.201.1.2610.201.1.27
7210.201.1.28/3010.201.1.29 – 10.201.1.3010.201.1.31
7310.201.1.32/3010.201.1.33 – 10.201.1.3410.201.1.35
7410.201.1.36/3010.201.1.37 – 10.201.1.3810.201.1.39
7510.201.1.40/3010.201.1.41 – 10.201.1.4210.201.1.43
7610.201.1.44/3010.201.1.45 – 10.201.1.4610.201.1.47
7710.201.1.48/3010.201.1.49 – 10.201.1.5010.201.1.51
7810.201.1.52/3010.201.1.53 – 10.201.1.5410.201.1.55
7910.201.1.56/3010.201.1.57 – 10.201.1.5810.201.1.59
8010.201.1.60/3010.201.1.61 – 10.201.1.6210.201.1.63
8110.201.1.64/3010.201.1.65 – 10.201.1.6610.201.1.67
8210.201.1.68/3010.201.1.69 – 10.201.1.7010.201.1.71
8310.201.1.72/3010.201.1.73 – 10.201.1.7410.201.1.75
8410.201.1.76/3010.201.1.77 – 10.201.1.7810.201.1.79
8510.201.1.80/3010.201.1.81 – 10.201.1.8210.201.1.83
8610.201.1.84/3010.201.1.85 – 10.201.1.8610.201.1.87
8710.201.1.88/3010.201.1.89 – 10.201.1.9010.201.1.91
8810.201.1.92/3010.201.1.93 – 10.201.1.9410.201.1.95
8910.201.1.96/3010.201.1.97 – 10.201.1.9810.201.1.99
9010.201.1.100/3010.201.1.101 – 10.201.1.10210.201.1.103
9110.201.1.104/3010.201.1.105 – 10.201.1.10610.201.1.107
9210.201.1.108/3010.201.1.109 – 10.201.1.11010.201.1.111
9310.201.1.112/3010.201.1.113 – 10.201.1.11410.201.1.115
9410.201.1.116/3010.201.1.117 – 10.201.1.11810.201.1.119
9510.201.1.120/3010.201.1.121 – 10.201.1.12210.201.1.123
9610.201.1.124/3010.201.1.125 – 10.201.1.12610.201.1.127
9710.201.1.128/3010.201.1.129 – 10.201.1.13010.201.1.131
9810.201.1.132/3010.201.1.133 – 10.201.1.13410.201.1.135
9910.201.1.136/3010.201.1.137 – 10.201.1.13810.201.1.139
10010.201.1.140/3010.201.1.141 – 10.201.1.14210.201.1.143
10110.201.1.144/3010.201.1.145 – 10.201.1.14610.201.1.147
10210.201.1.148/3010.201.1.149 – 10.201.1.15010.201.1.151
10310.201.1.152/3010.201.1.153 – 10.201.1.15410.201.1.155
10410.201.1.156/3010.201.1.157 – 10.201.1.15810.201.1.159
10510.201.1.160/3010.201.1.161 – 10.201.1.16210.201.1.163
10610.201.1.164/3010.201.1.165 – 10.201.1.16610.201.1.167
10710.201.1.168/3010.201.1.169 – 10.201.1.17010.201.1.171
10810.201.1.172/3010.201.1.173 – 10.201.1.17410.201.1.175
10910.201.1.176/3010.201.1.177 – 10.201.1.17810.201.1.179
11010.201.1.180/3010.201.1.181 – 10.201.1.18210.201.1.183
11110.201.1.184/3010.201.1.185 – 10.201.1.18610.201.1.187
11210.201.1.188/3010.201.1.189 – 10.201.1.19010.201.1.191
11310.201.1.192/3010.201.1.193 – 10.201.1.19410.201.1.195
11410.201.1.196/3010.201.1.197 – 10.201.1.19810.201.1.199
11510.201.1.200/3010.201.1.201 – 10.201.1.20210.201.1.203
11610.201.1.204/3010.201.1.205 – 10.201.1.20610.201.1.207
11710.201.1.208/3010.201.1.209 – 10.201.1.21010.201.1.211
11810.201.1.212/3010.201.1.213 – 10.201.1.21410.201.1.215
11910.201.1.216/3010.201.1.217 – 10.201.1.21810.201.1.219
12010.201.1.220/3010.201.1.221 – 10.201.1.22210.201.1.223
12110.201.1.224/3010.201.1.225 – 10.201.1.22610.201.1.227
12210.201.1.228/3010.201.1.229 – 10.201.1.23010.201.1.231
12310.201.1.232/3010.201.1.233 – 10.201.1.23410.201.1.235
12410.201.1.236/3010.201.1.237 – 10.201.1.23810.201.1.239
12510.201.1.240/3010.201.1.241 – 10.201.1.24210.201.1.243
12610.201.1.244/3010.201.1.245 – 10.201.1.24610.201.1.247
12710.201.1.248/3010.201.1.249 – 10.201.1.25010.201.1.251
12810.201.1.252/3010.201.1.253 – 10.201.1.25410.201.1.255
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 →