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)10.87.32.0/23
network10.87.32.0/23
broadcast10.87.33.255
first host10.87.32.1
last host10.87.33.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.32.0/23
address00001010.01010111.00100000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.00100000.00000000
broadcast00001010.01010111.00100001.11111111
green = network part, grey = host part
hex0x0a572000
decimal173481984
reverse dns0.32.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:2000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.32.0/3010.87.32.1 – 10.87.32.210.87.32.3
210.87.32.4/3010.87.32.5 – 10.87.32.610.87.32.7
310.87.32.8/3010.87.32.9 – 10.87.32.1010.87.32.11
410.87.32.12/3010.87.32.13 – 10.87.32.1410.87.32.15
510.87.32.16/3010.87.32.17 – 10.87.32.1810.87.32.19
610.87.32.20/3010.87.32.21 – 10.87.32.2210.87.32.23
710.87.32.24/3010.87.32.25 – 10.87.32.2610.87.32.27
810.87.32.28/3010.87.32.29 – 10.87.32.3010.87.32.31
910.87.32.32/3010.87.32.33 – 10.87.32.3410.87.32.35
1010.87.32.36/3010.87.32.37 – 10.87.32.3810.87.32.39
1110.87.32.40/3010.87.32.41 – 10.87.32.4210.87.32.43
1210.87.32.44/3010.87.32.45 – 10.87.32.4610.87.32.47
1310.87.32.48/3010.87.32.49 – 10.87.32.5010.87.32.51
1410.87.32.52/3010.87.32.53 – 10.87.32.5410.87.32.55
1510.87.32.56/3010.87.32.57 – 10.87.32.5810.87.32.59
1610.87.32.60/3010.87.32.61 – 10.87.32.6210.87.32.63
1710.87.32.64/3010.87.32.65 – 10.87.32.6610.87.32.67
1810.87.32.68/3010.87.32.69 – 10.87.32.7010.87.32.71
1910.87.32.72/3010.87.32.73 – 10.87.32.7410.87.32.75
2010.87.32.76/3010.87.32.77 – 10.87.32.7810.87.32.79
2110.87.32.80/3010.87.32.81 – 10.87.32.8210.87.32.83
2210.87.32.84/3010.87.32.85 – 10.87.32.8610.87.32.87
2310.87.32.88/3010.87.32.89 – 10.87.32.9010.87.32.91
2410.87.32.92/3010.87.32.93 – 10.87.32.9410.87.32.95
2510.87.32.96/3010.87.32.97 – 10.87.32.9810.87.32.99
2610.87.32.100/3010.87.32.101 – 10.87.32.10210.87.32.103
2710.87.32.104/3010.87.32.105 – 10.87.32.10610.87.32.107
2810.87.32.108/3010.87.32.109 – 10.87.32.11010.87.32.111
2910.87.32.112/3010.87.32.113 – 10.87.32.11410.87.32.115
3010.87.32.116/3010.87.32.117 – 10.87.32.11810.87.32.119
3110.87.32.120/3010.87.32.121 – 10.87.32.12210.87.32.123
3210.87.32.124/3010.87.32.125 – 10.87.32.12610.87.32.127
3310.87.32.128/3010.87.32.129 – 10.87.32.13010.87.32.131
3410.87.32.132/3010.87.32.133 – 10.87.32.13410.87.32.135
3510.87.32.136/3010.87.32.137 – 10.87.32.13810.87.32.139
3610.87.32.140/3010.87.32.141 – 10.87.32.14210.87.32.143
3710.87.32.144/3010.87.32.145 – 10.87.32.14610.87.32.147
3810.87.32.148/3010.87.32.149 – 10.87.32.15010.87.32.151
3910.87.32.152/3010.87.32.153 – 10.87.32.15410.87.32.155
4010.87.32.156/3010.87.32.157 – 10.87.32.15810.87.32.159
4110.87.32.160/3010.87.32.161 – 10.87.32.16210.87.32.163
4210.87.32.164/3010.87.32.165 – 10.87.32.16610.87.32.167
4310.87.32.168/3010.87.32.169 – 10.87.32.17010.87.32.171
4410.87.32.172/3010.87.32.173 – 10.87.32.17410.87.32.175
4510.87.32.176/3010.87.32.177 – 10.87.32.17810.87.32.179
4610.87.32.180/3010.87.32.181 – 10.87.32.18210.87.32.183
4710.87.32.184/3010.87.32.185 – 10.87.32.18610.87.32.187
4810.87.32.188/3010.87.32.189 – 10.87.32.19010.87.32.191
4910.87.32.192/3010.87.32.193 – 10.87.32.19410.87.32.195
5010.87.32.196/3010.87.32.197 – 10.87.32.19810.87.32.199
5110.87.32.200/3010.87.32.201 – 10.87.32.20210.87.32.203
5210.87.32.204/3010.87.32.205 – 10.87.32.20610.87.32.207
5310.87.32.208/3010.87.32.209 – 10.87.32.21010.87.32.211
5410.87.32.212/3010.87.32.213 – 10.87.32.21410.87.32.215
5510.87.32.216/3010.87.32.217 – 10.87.32.21810.87.32.219
5610.87.32.220/3010.87.32.221 – 10.87.32.22210.87.32.223
5710.87.32.224/3010.87.32.225 – 10.87.32.22610.87.32.227
5810.87.32.228/3010.87.32.229 – 10.87.32.23010.87.32.231
5910.87.32.232/3010.87.32.233 – 10.87.32.23410.87.32.235
6010.87.32.236/3010.87.32.237 – 10.87.32.23810.87.32.239
6110.87.32.240/3010.87.32.241 – 10.87.32.24210.87.32.243
6210.87.32.244/3010.87.32.245 – 10.87.32.24610.87.32.247
6310.87.32.248/3010.87.32.249 – 10.87.32.25010.87.32.251
6410.87.32.252/3010.87.32.253 – 10.87.32.25410.87.32.255
6510.87.33.0/3010.87.33.1 – 10.87.33.210.87.33.3
6610.87.33.4/3010.87.33.5 – 10.87.33.610.87.33.7
6710.87.33.8/3010.87.33.9 – 10.87.33.1010.87.33.11
6810.87.33.12/3010.87.33.13 – 10.87.33.1410.87.33.15
6910.87.33.16/3010.87.33.17 – 10.87.33.1810.87.33.19
7010.87.33.20/3010.87.33.21 – 10.87.33.2210.87.33.23
7110.87.33.24/3010.87.33.25 – 10.87.33.2610.87.33.27
7210.87.33.28/3010.87.33.29 – 10.87.33.3010.87.33.31
7310.87.33.32/3010.87.33.33 – 10.87.33.3410.87.33.35
7410.87.33.36/3010.87.33.37 – 10.87.33.3810.87.33.39
7510.87.33.40/3010.87.33.41 – 10.87.33.4210.87.33.43
7610.87.33.44/3010.87.33.45 – 10.87.33.4610.87.33.47
7710.87.33.48/3010.87.33.49 – 10.87.33.5010.87.33.51
7810.87.33.52/3010.87.33.53 – 10.87.33.5410.87.33.55
7910.87.33.56/3010.87.33.57 – 10.87.33.5810.87.33.59
8010.87.33.60/3010.87.33.61 – 10.87.33.6210.87.33.63
8110.87.33.64/3010.87.33.65 – 10.87.33.6610.87.33.67
8210.87.33.68/3010.87.33.69 – 10.87.33.7010.87.33.71
8310.87.33.72/3010.87.33.73 – 10.87.33.7410.87.33.75
8410.87.33.76/3010.87.33.77 – 10.87.33.7810.87.33.79
8510.87.33.80/3010.87.33.81 – 10.87.33.8210.87.33.83
8610.87.33.84/3010.87.33.85 – 10.87.33.8610.87.33.87
8710.87.33.88/3010.87.33.89 – 10.87.33.9010.87.33.91
8810.87.33.92/3010.87.33.93 – 10.87.33.9410.87.33.95
8910.87.33.96/3010.87.33.97 – 10.87.33.9810.87.33.99
9010.87.33.100/3010.87.33.101 – 10.87.33.10210.87.33.103
9110.87.33.104/3010.87.33.105 – 10.87.33.10610.87.33.107
9210.87.33.108/3010.87.33.109 – 10.87.33.11010.87.33.111
9310.87.33.112/3010.87.33.113 – 10.87.33.11410.87.33.115
9410.87.33.116/3010.87.33.117 – 10.87.33.11810.87.33.119
9510.87.33.120/3010.87.33.121 – 10.87.33.12210.87.33.123
9610.87.33.124/3010.87.33.125 – 10.87.33.12610.87.33.127
9710.87.33.128/3010.87.33.129 – 10.87.33.13010.87.33.131
9810.87.33.132/3010.87.33.133 – 10.87.33.13410.87.33.135
9910.87.33.136/3010.87.33.137 – 10.87.33.13810.87.33.139
10010.87.33.140/3010.87.33.141 – 10.87.33.14210.87.33.143
10110.87.33.144/3010.87.33.145 – 10.87.33.14610.87.33.147
10210.87.33.148/3010.87.33.149 – 10.87.33.15010.87.33.151
10310.87.33.152/3010.87.33.153 – 10.87.33.15410.87.33.155
10410.87.33.156/3010.87.33.157 – 10.87.33.15810.87.33.159
10510.87.33.160/3010.87.33.161 – 10.87.33.16210.87.33.163
10610.87.33.164/3010.87.33.165 – 10.87.33.16610.87.33.167
10710.87.33.168/3010.87.33.169 – 10.87.33.17010.87.33.171
10810.87.33.172/3010.87.33.173 – 10.87.33.17410.87.33.175
10910.87.33.176/3010.87.33.177 – 10.87.33.17810.87.33.179
11010.87.33.180/3010.87.33.181 – 10.87.33.18210.87.33.183
11110.87.33.184/3010.87.33.185 – 10.87.33.18610.87.33.187
11210.87.33.188/3010.87.33.189 – 10.87.33.19010.87.33.191
11310.87.33.192/3010.87.33.193 – 10.87.33.19410.87.33.195
11410.87.33.196/3010.87.33.197 – 10.87.33.19810.87.33.199
11510.87.33.200/3010.87.33.201 – 10.87.33.20210.87.33.203
11610.87.33.204/3010.87.33.205 – 10.87.33.20610.87.33.207
11710.87.33.208/3010.87.33.209 – 10.87.33.21010.87.33.211
11810.87.33.212/3010.87.33.213 – 10.87.33.21410.87.33.215
11910.87.33.216/3010.87.33.217 – 10.87.33.21810.87.33.219
12010.87.33.220/3010.87.33.221 – 10.87.33.22210.87.33.223
12110.87.33.224/3010.87.33.225 – 10.87.33.22610.87.33.227
12210.87.33.228/3010.87.33.229 – 10.87.33.23010.87.33.231
12310.87.33.232/3010.87.33.233 – 10.87.33.23410.87.33.235
12410.87.33.236/3010.87.33.237 – 10.87.33.23810.87.33.239
12510.87.33.240/3010.87.33.241 – 10.87.33.24210.87.33.243
12610.87.33.244/3010.87.33.245 – 10.87.33.24610.87.33.247
12710.87.33.248/3010.87.33.249 – 10.87.33.25010.87.33.251
12810.87.33.252/3010.87.33.253 – 10.87.33.25410.87.33.255
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 →