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)10.87.84.0/23
network10.87.84.0/23
broadcast10.87.85.255
first host10.87.84.1
last host10.87.85.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.84.0/23
address00001010.01010111.01010100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.01010100.00000000
broadcast00001010.01010111.01010101.11111111
green = network part, grey = host part
hex0x0a575400
decimal173495296
reverse dns0.84.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:5400

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.84.0/3010.87.84.1 – 10.87.84.210.87.84.3
210.87.84.4/3010.87.84.5 – 10.87.84.610.87.84.7
310.87.84.8/3010.87.84.9 – 10.87.84.1010.87.84.11
410.87.84.12/3010.87.84.13 – 10.87.84.1410.87.84.15
510.87.84.16/3010.87.84.17 – 10.87.84.1810.87.84.19
610.87.84.20/3010.87.84.21 – 10.87.84.2210.87.84.23
710.87.84.24/3010.87.84.25 – 10.87.84.2610.87.84.27
810.87.84.28/3010.87.84.29 – 10.87.84.3010.87.84.31
910.87.84.32/3010.87.84.33 – 10.87.84.3410.87.84.35
1010.87.84.36/3010.87.84.37 – 10.87.84.3810.87.84.39
1110.87.84.40/3010.87.84.41 – 10.87.84.4210.87.84.43
1210.87.84.44/3010.87.84.45 – 10.87.84.4610.87.84.47
1310.87.84.48/3010.87.84.49 – 10.87.84.5010.87.84.51
1410.87.84.52/3010.87.84.53 – 10.87.84.5410.87.84.55
1510.87.84.56/3010.87.84.57 – 10.87.84.5810.87.84.59
1610.87.84.60/3010.87.84.61 – 10.87.84.6210.87.84.63
1710.87.84.64/3010.87.84.65 – 10.87.84.6610.87.84.67
1810.87.84.68/3010.87.84.69 – 10.87.84.7010.87.84.71
1910.87.84.72/3010.87.84.73 – 10.87.84.7410.87.84.75
2010.87.84.76/3010.87.84.77 – 10.87.84.7810.87.84.79
2110.87.84.80/3010.87.84.81 – 10.87.84.8210.87.84.83
2210.87.84.84/3010.87.84.85 – 10.87.84.8610.87.84.87
2310.87.84.88/3010.87.84.89 – 10.87.84.9010.87.84.91
2410.87.84.92/3010.87.84.93 – 10.87.84.9410.87.84.95
2510.87.84.96/3010.87.84.97 – 10.87.84.9810.87.84.99
2610.87.84.100/3010.87.84.101 – 10.87.84.10210.87.84.103
2710.87.84.104/3010.87.84.105 – 10.87.84.10610.87.84.107
2810.87.84.108/3010.87.84.109 – 10.87.84.11010.87.84.111
2910.87.84.112/3010.87.84.113 – 10.87.84.11410.87.84.115
3010.87.84.116/3010.87.84.117 – 10.87.84.11810.87.84.119
3110.87.84.120/3010.87.84.121 – 10.87.84.12210.87.84.123
3210.87.84.124/3010.87.84.125 – 10.87.84.12610.87.84.127
3310.87.84.128/3010.87.84.129 – 10.87.84.13010.87.84.131
3410.87.84.132/3010.87.84.133 – 10.87.84.13410.87.84.135
3510.87.84.136/3010.87.84.137 – 10.87.84.13810.87.84.139
3610.87.84.140/3010.87.84.141 – 10.87.84.14210.87.84.143
3710.87.84.144/3010.87.84.145 – 10.87.84.14610.87.84.147
3810.87.84.148/3010.87.84.149 – 10.87.84.15010.87.84.151
3910.87.84.152/3010.87.84.153 – 10.87.84.15410.87.84.155
4010.87.84.156/3010.87.84.157 – 10.87.84.15810.87.84.159
4110.87.84.160/3010.87.84.161 – 10.87.84.16210.87.84.163
4210.87.84.164/3010.87.84.165 – 10.87.84.16610.87.84.167
4310.87.84.168/3010.87.84.169 – 10.87.84.17010.87.84.171
4410.87.84.172/3010.87.84.173 – 10.87.84.17410.87.84.175
4510.87.84.176/3010.87.84.177 – 10.87.84.17810.87.84.179
4610.87.84.180/3010.87.84.181 – 10.87.84.18210.87.84.183
4710.87.84.184/3010.87.84.185 – 10.87.84.18610.87.84.187
4810.87.84.188/3010.87.84.189 – 10.87.84.19010.87.84.191
4910.87.84.192/3010.87.84.193 – 10.87.84.19410.87.84.195
5010.87.84.196/3010.87.84.197 – 10.87.84.19810.87.84.199
5110.87.84.200/3010.87.84.201 – 10.87.84.20210.87.84.203
5210.87.84.204/3010.87.84.205 – 10.87.84.20610.87.84.207
5310.87.84.208/3010.87.84.209 – 10.87.84.21010.87.84.211
5410.87.84.212/3010.87.84.213 – 10.87.84.21410.87.84.215
5510.87.84.216/3010.87.84.217 – 10.87.84.21810.87.84.219
5610.87.84.220/3010.87.84.221 – 10.87.84.22210.87.84.223
5710.87.84.224/3010.87.84.225 – 10.87.84.22610.87.84.227
5810.87.84.228/3010.87.84.229 – 10.87.84.23010.87.84.231
5910.87.84.232/3010.87.84.233 – 10.87.84.23410.87.84.235
6010.87.84.236/3010.87.84.237 – 10.87.84.23810.87.84.239
6110.87.84.240/3010.87.84.241 – 10.87.84.24210.87.84.243
6210.87.84.244/3010.87.84.245 – 10.87.84.24610.87.84.247
6310.87.84.248/3010.87.84.249 – 10.87.84.25010.87.84.251
6410.87.84.252/3010.87.84.253 – 10.87.84.25410.87.84.255
6510.87.85.0/3010.87.85.1 – 10.87.85.210.87.85.3
6610.87.85.4/3010.87.85.5 – 10.87.85.610.87.85.7
6710.87.85.8/3010.87.85.9 – 10.87.85.1010.87.85.11
6810.87.85.12/3010.87.85.13 – 10.87.85.1410.87.85.15
6910.87.85.16/3010.87.85.17 – 10.87.85.1810.87.85.19
7010.87.85.20/3010.87.85.21 – 10.87.85.2210.87.85.23
7110.87.85.24/3010.87.85.25 – 10.87.85.2610.87.85.27
7210.87.85.28/3010.87.85.29 – 10.87.85.3010.87.85.31
7310.87.85.32/3010.87.85.33 – 10.87.85.3410.87.85.35
7410.87.85.36/3010.87.85.37 – 10.87.85.3810.87.85.39
7510.87.85.40/3010.87.85.41 – 10.87.85.4210.87.85.43
7610.87.85.44/3010.87.85.45 – 10.87.85.4610.87.85.47
7710.87.85.48/3010.87.85.49 – 10.87.85.5010.87.85.51
7810.87.85.52/3010.87.85.53 – 10.87.85.5410.87.85.55
7910.87.85.56/3010.87.85.57 – 10.87.85.5810.87.85.59
8010.87.85.60/3010.87.85.61 – 10.87.85.6210.87.85.63
8110.87.85.64/3010.87.85.65 – 10.87.85.6610.87.85.67
8210.87.85.68/3010.87.85.69 – 10.87.85.7010.87.85.71
8310.87.85.72/3010.87.85.73 – 10.87.85.7410.87.85.75
8410.87.85.76/3010.87.85.77 – 10.87.85.7810.87.85.79
8510.87.85.80/3010.87.85.81 – 10.87.85.8210.87.85.83
8610.87.85.84/3010.87.85.85 – 10.87.85.8610.87.85.87
8710.87.85.88/3010.87.85.89 – 10.87.85.9010.87.85.91
8810.87.85.92/3010.87.85.93 – 10.87.85.9410.87.85.95
8910.87.85.96/3010.87.85.97 – 10.87.85.9810.87.85.99
9010.87.85.100/3010.87.85.101 – 10.87.85.10210.87.85.103
9110.87.85.104/3010.87.85.105 – 10.87.85.10610.87.85.107
9210.87.85.108/3010.87.85.109 – 10.87.85.11010.87.85.111
9310.87.85.112/3010.87.85.113 – 10.87.85.11410.87.85.115
9410.87.85.116/3010.87.85.117 – 10.87.85.11810.87.85.119
9510.87.85.120/3010.87.85.121 – 10.87.85.12210.87.85.123
9610.87.85.124/3010.87.85.125 – 10.87.85.12610.87.85.127
9710.87.85.128/3010.87.85.129 – 10.87.85.13010.87.85.131
9810.87.85.132/3010.87.85.133 – 10.87.85.13410.87.85.135
9910.87.85.136/3010.87.85.137 – 10.87.85.13810.87.85.139
10010.87.85.140/3010.87.85.141 – 10.87.85.14210.87.85.143
10110.87.85.144/3010.87.85.145 – 10.87.85.14610.87.85.147
10210.87.85.148/3010.87.85.149 – 10.87.85.15010.87.85.151
10310.87.85.152/3010.87.85.153 – 10.87.85.15410.87.85.155
10410.87.85.156/3010.87.85.157 – 10.87.85.15810.87.85.159
10510.87.85.160/3010.87.85.161 – 10.87.85.16210.87.85.163
10610.87.85.164/3010.87.85.165 – 10.87.85.16610.87.85.167
10710.87.85.168/3010.87.85.169 – 10.87.85.17010.87.85.171
10810.87.85.172/3010.87.85.173 – 10.87.85.17410.87.85.175
10910.87.85.176/3010.87.85.177 – 10.87.85.17810.87.85.179
11010.87.85.180/3010.87.85.181 – 10.87.85.18210.87.85.183
11110.87.85.184/3010.87.85.185 – 10.87.85.18610.87.85.187
11210.87.85.188/3010.87.85.189 – 10.87.85.19010.87.85.191
11310.87.85.192/3010.87.85.193 – 10.87.85.19410.87.85.195
11410.87.85.196/3010.87.85.197 – 10.87.85.19810.87.85.199
11510.87.85.200/3010.87.85.201 – 10.87.85.20210.87.85.203
11610.87.85.204/3010.87.85.205 – 10.87.85.20610.87.85.207
11710.87.85.208/3010.87.85.209 – 10.87.85.21010.87.85.211
11810.87.85.212/3010.87.85.213 – 10.87.85.21410.87.85.215
11910.87.85.216/3010.87.85.217 – 10.87.85.21810.87.85.219
12010.87.85.220/3010.87.85.221 – 10.87.85.22210.87.85.223
12110.87.85.224/3010.87.85.225 – 10.87.85.22610.87.85.227
12210.87.85.228/3010.87.85.229 – 10.87.85.23010.87.85.231
12310.87.85.232/3010.87.85.233 – 10.87.85.23410.87.85.235
12410.87.85.236/3010.87.85.237 – 10.87.85.23810.87.85.239
12510.87.85.240/3010.87.85.241 – 10.87.85.24210.87.85.243
12610.87.85.244/3010.87.85.245 – 10.87.85.24610.87.85.247
12710.87.85.248/3010.87.85.249 – 10.87.85.25010.87.85.251
12810.87.85.252/3010.87.85.253 – 10.87.85.25410.87.85.255
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 →