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)10.87.80.0/23
network10.87.80.0/23
broadcast10.87.81.255
first host10.87.80.1
last host10.87.81.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.80.0/23
address00001010.01010111.01010000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.01010000.00000000
broadcast00001010.01010111.01010001.11111111
green = network part, grey = host part
hex0x0a575000
decimal173494272
reverse dns0.80.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:5000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.80.0/3010.87.80.1 – 10.87.80.210.87.80.3
210.87.80.4/3010.87.80.5 – 10.87.80.610.87.80.7
310.87.80.8/3010.87.80.9 – 10.87.80.1010.87.80.11
410.87.80.12/3010.87.80.13 – 10.87.80.1410.87.80.15
510.87.80.16/3010.87.80.17 – 10.87.80.1810.87.80.19
610.87.80.20/3010.87.80.21 – 10.87.80.2210.87.80.23
710.87.80.24/3010.87.80.25 – 10.87.80.2610.87.80.27
810.87.80.28/3010.87.80.29 – 10.87.80.3010.87.80.31
910.87.80.32/3010.87.80.33 – 10.87.80.3410.87.80.35
1010.87.80.36/3010.87.80.37 – 10.87.80.3810.87.80.39
1110.87.80.40/3010.87.80.41 – 10.87.80.4210.87.80.43
1210.87.80.44/3010.87.80.45 – 10.87.80.4610.87.80.47
1310.87.80.48/3010.87.80.49 – 10.87.80.5010.87.80.51
1410.87.80.52/3010.87.80.53 – 10.87.80.5410.87.80.55
1510.87.80.56/3010.87.80.57 – 10.87.80.5810.87.80.59
1610.87.80.60/3010.87.80.61 – 10.87.80.6210.87.80.63
1710.87.80.64/3010.87.80.65 – 10.87.80.6610.87.80.67
1810.87.80.68/3010.87.80.69 – 10.87.80.7010.87.80.71
1910.87.80.72/3010.87.80.73 – 10.87.80.7410.87.80.75
2010.87.80.76/3010.87.80.77 – 10.87.80.7810.87.80.79
2110.87.80.80/3010.87.80.81 – 10.87.80.8210.87.80.83
2210.87.80.84/3010.87.80.85 – 10.87.80.8610.87.80.87
2310.87.80.88/3010.87.80.89 – 10.87.80.9010.87.80.91
2410.87.80.92/3010.87.80.93 – 10.87.80.9410.87.80.95
2510.87.80.96/3010.87.80.97 – 10.87.80.9810.87.80.99
2610.87.80.100/3010.87.80.101 – 10.87.80.10210.87.80.103
2710.87.80.104/3010.87.80.105 – 10.87.80.10610.87.80.107
2810.87.80.108/3010.87.80.109 – 10.87.80.11010.87.80.111
2910.87.80.112/3010.87.80.113 – 10.87.80.11410.87.80.115
3010.87.80.116/3010.87.80.117 – 10.87.80.11810.87.80.119
3110.87.80.120/3010.87.80.121 – 10.87.80.12210.87.80.123
3210.87.80.124/3010.87.80.125 – 10.87.80.12610.87.80.127
3310.87.80.128/3010.87.80.129 – 10.87.80.13010.87.80.131
3410.87.80.132/3010.87.80.133 – 10.87.80.13410.87.80.135
3510.87.80.136/3010.87.80.137 – 10.87.80.13810.87.80.139
3610.87.80.140/3010.87.80.141 – 10.87.80.14210.87.80.143
3710.87.80.144/3010.87.80.145 – 10.87.80.14610.87.80.147
3810.87.80.148/3010.87.80.149 – 10.87.80.15010.87.80.151
3910.87.80.152/3010.87.80.153 – 10.87.80.15410.87.80.155
4010.87.80.156/3010.87.80.157 – 10.87.80.15810.87.80.159
4110.87.80.160/3010.87.80.161 – 10.87.80.16210.87.80.163
4210.87.80.164/3010.87.80.165 – 10.87.80.16610.87.80.167
4310.87.80.168/3010.87.80.169 – 10.87.80.17010.87.80.171
4410.87.80.172/3010.87.80.173 – 10.87.80.17410.87.80.175
4510.87.80.176/3010.87.80.177 – 10.87.80.17810.87.80.179
4610.87.80.180/3010.87.80.181 – 10.87.80.18210.87.80.183
4710.87.80.184/3010.87.80.185 – 10.87.80.18610.87.80.187
4810.87.80.188/3010.87.80.189 – 10.87.80.19010.87.80.191
4910.87.80.192/3010.87.80.193 – 10.87.80.19410.87.80.195
5010.87.80.196/3010.87.80.197 – 10.87.80.19810.87.80.199
5110.87.80.200/3010.87.80.201 – 10.87.80.20210.87.80.203
5210.87.80.204/3010.87.80.205 – 10.87.80.20610.87.80.207
5310.87.80.208/3010.87.80.209 – 10.87.80.21010.87.80.211
5410.87.80.212/3010.87.80.213 – 10.87.80.21410.87.80.215
5510.87.80.216/3010.87.80.217 – 10.87.80.21810.87.80.219
5610.87.80.220/3010.87.80.221 – 10.87.80.22210.87.80.223
5710.87.80.224/3010.87.80.225 – 10.87.80.22610.87.80.227
5810.87.80.228/3010.87.80.229 – 10.87.80.23010.87.80.231
5910.87.80.232/3010.87.80.233 – 10.87.80.23410.87.80.235
6010.87.80.236/3010.87.80.237 – 10.87.80.23810.87.80.239
6110.87.80.240/3010.87.80.241 – 10.87.80.24210.87.80.243
6210.87.80.244/3010.87.80.245 – 10.87.80.24610.87.80.247
6310.87.80.248/3010.87.80.249 – 10.87.80.25010.87.80.251
6410.87.80.252/3010.87.80.253 – 10.87.80.25410.87.80.255
6510.87.81.0/3010.87.81.1 – 10.87.81.210.87.81.3
6610.87.81.4/3010.87.81.5 – 10.87.81.610.87.81.7
6710.87.81.8/3010.87.81.9 – 10.87.81.1010.87.81.11
6810.87.81.12/3010.87.81.13 – 10.87.81.1410.87.81.15
6910.87.81.16/3010.87.81.17 – 10.87.81.1810.87.81.19
7010.87.81.20/3010.87.81.21 – 10.87.81.2210.87.81.23
7110.87.81.24/3010.87.81.25 – 10.87.81.2610.87.81.27
7210.87.81.28/3010.87.81.29 – 10.87.81.3010.87.81.31
7310.87.81.32/3010.87.81.33 – 10.87.81.3410.87.81.35
7410.87.81.36/3010.87.81.37 – 10.87.81.3810.87.81.39
7510.87.81.40/3010.87.81.41 – 10.87.81.4210.87.81.43
7610.87.81.44/3010.87.81.45 – 10.87.81.4610.87.81.47
7710.87.81.48/3010.87.81.49 – 10.87.81.5010.87.81.51
7810.87.81.52/3010.87.81.53 – 10.87.81.5410.87.81.55
7910.87.81.56/3010.87.81.57 – 10.87.81.5810.87.81.59
8010.87.81.60/3010.87.81.61 – 10.87.81.6210.87.81.63
8110.87.81.64/3010.87.81.65 – 10.87.81.6610.87.81.67
8210.87.81.68/3010.87.81.69 – 10.87.81.7010.87.81.71
8310.87.81.72/3010.87.81.73 – 10.87.81.7410.87.81.75
8410.87.81.76/3010.87.81.77 – 10.87.81.7810.87.81.79
8510.87.81.80/3010.87.81.81 – 10.87.81.8210.87.81.83
8610.87.81.84/3010.87.81.85 – 10.87.81.8610.87.81.87
8710.87.81.88/3010.87.81.89 – 10.87.81.9010.87.81.91
8810.87.81.92/3010.87.81.93 – 10.87.81.9410.87.81.95
8910.87.81.96/3010.87.81.97 – 10.87.81.9810.87.81.99
9010.87.81.100/3010.87.81.101 – 10.87.81.10210.87.81.103
9110.87.81.104/3010.87.81.105 – 10.87.81.10610.87.81.107
9210.87.81.108/3010.87.81.109 – 10.87.81.11010.87.81.111
9310.87.81.112/3010.87.81.113 – 10.87.81.11410.87.81.115
9410.87.81.116/3010.87.81.117 – 10.87.81.11810.87.81.119
9510.87.81.120/3010.87.81.121 – 10.87.81.12210.87.81.123
9610.87.81.124/3010.87.81.125 – 10.87.81.12610.87.81.127
9710.87.81.128/3010.87.81.129 – 10.87.81.13010.87.81.131
9810.87.81.132/3010.87.81.133 – 10.87.81.13410.87.81.135
9910.87.81.136/3010.87.81.137 – 10.87.81.13810.87.81.139
10010.87.81.140/3010.87.81.141 – 10.87.81.14210.87.81.143
10110.87.81.144/3010.87.81.145 – 10.87.81.14610.87.81.147
10210.87.81.148/3010.87.81.149 – 10.87.81.15010.87.81.151
10310.87.81.152/3010.87.81.153 – 10.87.81.15410.87.81.155
10410.87.81.156/3010.87.81.157 – 10.87.81.15810.87.81.159
10510.87.81.160/3010.87.81.161 – 10.87.81.16210.87.81.163
10610.87.81.164/3010.87.81.165 – 10.87.81.16610.87.81.167
10710.87.81.168/3010.87.81.169 – 10.87.81.17010.87.81.171
10810.87.81.172/3010.87.81.173 – 10.87.81.17410.87.81.175
10910.87.81.176/3010.87.81.177 – 10.87.81.17810.87.81.179
11010.87.81.180/3010.87.81.181 – 10.87.81.18210.87.81.183
11110.87.81.184/3010.87.81.185 – 10.87.81.18610.87.81.187
11210.87.81.188/3010.87.81.189 – 10.87.81.19010.87.81.191
11310.87.81.192/3010.87.81.193 – 10.87.81.19410.87.81.195
11410.87.81.196/3010.87.81.197 – 10.87.81.19810.87.81.199
11510.87.81.200/3010.87.81.201 – 10.87.81.20210.87.81.203
11610.87.81.204/3010.87.81.205 – 10.87.81.20610.87.81.207
11710.87.81.208/3010.87.81.209 – 10.87.81.21010.87.81.211
11810.87.81.212/3010.87.81.213 – 10.87.81.21410.87.81.215
11910.87.81.216/3010.87.81.217 – 10.87.81.21810.87.81.219
12010.87.81.220/3010.87.81.221 – 10.87.81.22210.87.81.223
12110.87.81.224/3010.87.81.225 – 10.87.81.22610.87.81.227
12210.87.81.228/3010.87.81.229 – 10.87.81.23010.87.81.231
12310.87.81.232/3010.87.81.233 – 10.87.81.23410.87.81.235
12410.87.81.236/3010.87.81.237 – 10.87.81.23810.87.81.239
12510.87.81.240/3010.87.81.241 – 10.87.81.24210.87.81.243
12610.87.81.244/3010.87.81.245 – 10.87.81.24610.87.81.247
12710.87.81.248/3010.87.81.249 – 10.87.81.25010.87.81.251
12810.87.81.252/3010.87.81.253 – 10.87.81.25410.87.81.255
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 →