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)10.87.96.0/23
network10.87.96.0/23
broadcast10.87.97.255
first host10.87.96.1
last host10.87.97.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.96.0/23
address00001010.01010111.01100000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.01100000.00000000
broadcast00001010.01010111.01100001.11111111
green = network part, grey = host part
hex0x0a576000
decimal173498368
reverse dns0.96.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:6000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.96.0/3010.87.96.1 – 10.87.96.210.87.96.3
210.87.96.4/3010.87.96.5 – 10.87.96.610.87.96.7
310.87.96.8/3010.87.96.9 – 10.87.96.1010.87.96.11
410.87.96.12/3010.87.96.13 – 10.87.96.1410.87.96.15
510.87.96.16/3010.87.96.17 – 10.87.96.1810.87.96.19
610.87.96.20/3010.87.96.21 – 10.87.96.2210.87.96.23
710.87.96.24/3010.87.96.25 – 10.87.96.2610.87.96.27
810.87.96.28/3010.87.96.29 – 10.87.96.3010.87.96.31
910.87.96.32/3010.87.96.33 – 10.87.96.3410.87.96.35
1010.87.96.36/3010.87.96.37 – 10.87.96.3810.87.96.39
1110.87.96.40/3010.87.96.41 – 10.87.96.4210.87.96.43
1210.87.96.44/3010.87.96.45 – 10.87.96.4610.87.96.47
1310.87.96.48/3010.87.96.49 – 10.87.96.5010.87.96.51
1410.87.96.52/3010.87.96.53 – 10.87.96.5410.87.96.55
1510.87.96.56/3010.87.96.57 – 10.87.96.5810.87.96.59
1610.87.96.60/3010.87.96.61 – 10.87.96.6210.87.96.63
1710.87.96.64/3010.87.96.65 – 10.87.96.6610.87.96.67
1810.87.96.68/3010.87.96.69 – 10.87.96.7010.87.96.71
1910.87.96.72/3010.87.96.73 – 10.87.96.7410.87.96.75
2010.87.96.76/3010.87.96.77 – 10.87.96.7810.87.96.79
2110.87.96.80/3010.87.96.81 – 10.87.96.8210.87.96.83
2210.87.96.84/3010.87.96.85 – 10.87.96.8610.87.96.87
2310.87.96.88/3010.87.96.89 – 10.87.96.9010.87.96.91
2410.87.96.92/3010.87.96.93 – 10.87.96.9410.87.96.95
2510.87.96.96/3010.87.96.97 – 10.87.96.9810.87.96.99
2610.87.96.100/3010.87.96.101 – 10.87.96.10210.87.96.103
2710.87.96.104/3010.87.96.105 – 10.87.96.10610.87.96.107
2810.87.96.108/3010.87.96.109 – 10.87.96.11010.87.96.111
2910.87.96.112/3010.87.96.113 – 10.87.96.11410.87.96.115
3010.87.96.116/3010.87.96.117 – 10.87.96.11810.87.96.119
3110.87.96.120/3010.87.96.121 – 10.87.96.12210.87.96.123
3210.87.96.124/3010.87.96.125 – 10.87.96.12610.87.96.127
3310.87.96.128/3010.87.96.129 – 10.87.96.13010.87.96.131
3410.87.96.132/3010.87.96.133 – 10.87.96.13410.87.96.135
3510.87.96.136/3010.87.96.137 – 10.87.96.13810.87.96.139
3610.87.96.140/3010.87.96.141 – 10.87.96.14210.87.96.143
3710.87.96.144/3010.87.96.145 – 10.87.96.14610.87.96.147
3810.87.96.148/3010.87.96.149 – 10.87.96.15010.87.96.151
3910.87.96.152/3010.87.96.153 – 10.87.96.15410.87.96.155
4010.87.96.156/3010.87.96.157 – 10.87.96.15810.87.96.159
4110.87.96.160/3010.87.96.161 – 10.87.96.16210.87.96.163
4210.87.96.164/3010.87.96.165 – 10.87.96.16610.87.96.167
4310.87.96.168/3010.87.96.169 – 10.87.96.17010.87.96.171
4410.87.96.172/3010.87.96.173 – 10.87.96.17410.87.96.175
4510.87.96.176/3010.87.96.177 – 10.87.96.17810.87.96.179
4610.87.96.180/3010.87.96.181 – 10.87.96.18210.87.96.183
4710.87.96.184/3010.87.96.185 – 10.87.96.18610.87.96.187
4810.87.96.188/3010.87.96.189 – 10.87.96.19010.87.96.191
4910.87.96.192/3010.87.96.193 – 10.87.96.19410.87.96.195
5010.87.96.196/3010.87.96.197 – 10.87.96.19810.87.96.199
5110.87.96.200/3010.87.96.201 – 10.87.96.20210.87.96.203
5210.87.96.204/3010.87.96.205 – 10.87.96.20610.87.96.207
5310.87.96.208/3010.87.96.209 – 10.87.96.21010.87.96.211
5410.87.96.212/3010.87.96.213 – 10.87.96.21410.87.96.215
5510.87.96.216/3010.87.96.217 – 10.87.96.21810.87.96.219
5610.87.96.220/3010.87.96.221 – 10.87.96.22210.87.96.223
5710.87.96.224/3010.87.96.225 – 10.87.96.22610.87.96.227
5810.87.96.228/3010.87.96.229 – 10.87.96.23010.87.96.231
5910.87.96.232/3010.87.96.233 – 10.87.96.23410.87.96.235
6010.87.96.236/3010.87.96.237 – 10.87.96.23810.87.96.239
6110.87.96.240/3010.87.96.241 – 10.87.96.24210.87.96.243
6210.87.96.244/3010.87.96.245 – 10.87.96.24610.87.96.247
6310.87.96.248/3010.87.96.249 – 10.87.96.25010.87.96.251
6410.87.96.252/3010.87.96.253 – 10.87.96.25410.87.96.255
6510.87.97.0/3010.87.97.1 – 10.87.97.210.87.97.3
6610.87.97.4/3010.87.97.5 – 10.87.97.610.87.97.7
6710.87.97.8/3010.87.97.9 – 10.87.97.1010.87.97.11
6810.87.97.12/3010.87.97.13 – 10.87.97.1410.87.97.15
6910.87.97.16/3010.87.97.17 – 10.87.97.1810.87.97.19
7010.87.97.20/3010.87.97.21 – 10.87.97.2210.87.97.23
7110.87.97.24/3010.87.97.25 – 10.87.97.2610.87.97.27
7210.87.97.28/3010.87.97.29 – 10.87.97.3010.87.97.31
7310.87.97.32/3010.87.97.33 – 10.87.97.3410.87.97.35
7410.87.97.36/3010.87.97.37 – 10.87.97.3810.87.97.39
7510.87.97.40/3010.87.97.41 – 10.87.97.4210.87.97.43
7610.87.97.44/3010.87.97.45 – 10.87.97.4610.87.97.47
7710.87.97.48/3010.87.97.49 – 10.87.97.5010.87.97.51
7810.87.97.52/3010.87.97.53 – 10.87.97.5410.87.97.55
7910.87.97.56/3010.87.97.57 – 10.87.97.5810.87.97.59
8010.87.97.60/3010.87.97.61 – 10.87.97.6210.87.97.63
8110.87.97.64/3010.87.97.65 – 10.87.97.6610.87.97.67
8210.87.97.68/3010.87.97.69 – 10.87.97.7010.87.97.71
8310.87.97.72/3010.87.97.73 – 10.87.97.7410.87.97.75
8410.87.97.76/3010.87.97.77 – 10.87.97.7810.87.97.79
8510.87.97.80/3010.87.97.81 – 10.87.97.8210.87.97.83
8610.87.97.84/3010.87.97.85 – 10.87.97.8610.87.97.87
8710.87.97.88/3010.87.97.89 – 10.87.97.9010.87.97.91
8810.87.97.92/3010.87.97.93 – 10.87.97.9410.87.97.95
8910.87.97.96/3010.87.97.97 – 10.87.97.9810.87.97.99
9010.87.97.100/3010.87.97.101 – 10.87.97.10210.87.97.103
9110.87.97.104/3010.87.97.105 – 10.87.97.10610.87.97.107
9210.87.97.108/3010.87.97.109 – 10.87.97.11010.87.97.111
9310.87.97.112/3010.87.97.113 – 10.87.97.11410.87.97.115
9410.87.97.116/3010.87.97.117 – 10.87.97.11810.87.97.119
9510.87.97.120/3010.87.97.121 – 10.87.97.12210.87.97.123
9610.87.97.124/3010.87.97.125 – 10.87.97.12610.87.97.127
9710.87.97.128/3010.87.97.129 – 10.87.97.13010.87.97.131
9810.87.97.132/3010.87.97.133 – 10.87.97.13410.87.97.135
9910.87.97.136/3010.87.97.137 – 10.87.97.13810.87.97.139
10010.87.97.140/3010.87.97.141 – 10.87.97.14210.87.97.143
10110.87.97.144/3010.87.97.145 – 10.87.97.14610.87.97.147
10210.87.97.148/3010.87.97.149 – 10.87.97.15010.87.97.151
10310.87.97.152/3010.87.97.153 – 10.87.97.15410.87.97.155
10410.87.97.156/3010.87.97.157 – 10.87.97.15810.87.97.159
10510.87.97.160/3010.87.97.161 – 10.87.97.16210.87.97.163
10610.87.97.164/3010.87.97.165 – 10.87.97.16610.87.97.167
10710.87.97.168/3010.87.97.169 – 10.87.97.17010.87.97.171
10810.87.97.172/3010.87.97.173 – 10.87.97.17410.87.97.175
10910.87.97.176/3010.87.97.177 – 10.87.97.17810.87.97.179
11010.87.97.180/3010.87.97.181 – 10.87.97.18210.87.97.183
11110.87.97.184/3010.87.97.185 – 10.87.97.18610.87.97.187
11210.87.97.188/3010.87.97.189 – 10.87.97.19010.87.97.191
11310.87.97.192/3010.87.97.193 – 10.87.97.19410.87.97.195
11410.87.97.196/3010.87.97.197 – 10.87.97.19810.87.97.199
11510.87.97.200/3010.87.97.201 – 10.87.97.20210.87.97.203
11610.87.97.204/3010.87.97.205 – 10.87.97.20610.87.97.207
11710.87.97.208/3010.87.97.209 – 10.87.97.21010.87.97.211
11810.87.97.212/3010.87.97.213 – 10.87.97.21410.87.97.215
11910.87.97.216/3010.87.97.217 – 10.87.97.21810.87.97.219
12010.87.97.220/3010.87.97.221 – 10.87.97.22210.87.97.223
12110.87.97.224/3010.87.97.225 – 10.87.97.22610.87.97.227
12210.87.97.228/3010.87.97.229 – 10.87.97.23010.87.97.231
12310.87.97.232/3010.87.97.233 – 10.87.97.23410.87.97.235
12410.87.97.236/3010.87.97.237 – 10.87.97.23810.87.97.239
12510.87.97.240/3010.87.97.241 – 10.87.97.24210.87.97.243
12610.87.97.244/3010.87.97.245 – 10.87.97.24610.87.97.247
12710.87.97.248/3010.87.97.249 – 10.87.97.25010.87.97.251
12810.87.97.252/3010.87.97.253 – 10.87.97.25410.87.97.255
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 →