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)10.167.120.0/23
network10.167.120.0/23
broadcast10.167.121.255
first host10.167.120.1
last host10.167.121.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.120.0/23
address00001010.10100111.01111000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.01111000.00000000
broadcast00001010.10100111.01111001.11111111
green = network part, grey = host part
hex0x0aa77800
decimal178747392
reverse dns0.120.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:7800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.120.0/3010.167.120.1 – 10.167.120.210.167.120.3
210.167.120.4/3010.167.120.5 – 10.167.120.610.167.120.7
310.167.120.8/3010.167.120.9 – 10.167.120.1010.167.120.11
410.167.120.12/3010.167.120.13 – 10.167.120.1410.167.120.15
510.167.120.16/3010.167.120.17 – 10.167.120.1810.167.120.19
610.167.120.20/3010.167.120.21 – 10.167.120.2210.167.120.23
710.167.120.24/3010.167.120.25 – 10.167.120.2610.167.120.27
810.167.120.28/3010.167.120.29 – 10.167.120.3010.167.120.31
910.167.120.32/3010.167.120.33 – 10.167.120.3410.167.120.35
1010.167.120.36/3010.167.120.37 – 10.167.120.3810.167.120.39
1110.167.120.40/3010.167.120.41 – 10.167.120.4210.167.120.43
1210.167.120.44/3010.167.120.45 – 10.167.120.4610.167.120.47
1310.167.120.48/3010.167.120.49 – 10.167.120.5010.167.120.51
1410.167.120.52/3010.167.120.53 – 10.167.120.5410.167.120.55
1510.167.120.56/3010.167.120.57 – 10.167.120.5810.167.120.59
1610.167.120.60/3010.167.120.61 – 10.167.120.6210.167.120.63
1710.167.120.64/3010.167.120.65 – 10.167.120.6610.167.120.67
1810.167.120.68/3010.167.120.69 – 10.167.120.7010.167.120.71
1910.167.120.72/3010.167.120.73 – 10.167.120.7410.167.120.75
2010.167.120.76/3010.167.120.77 – 10.167.120.7810.167.120.79
2110.167.120.80/3010.167.120.81 – 10.167.120.8210.167.120.83
2210.167.120.84/3010.167.120.85 – 10.167.120.8610.167.120.87
2310.167.120.88/3010.167.120.89 – 10.167.120.9010.167.120.91
2410.167.120.92/3010.167.120.93 – 10.167.120.9410.167.120.95
2510.167.120.96/3010.167.120.97 – 10.167.120.9810.167.120.99
2610.167.120.100/3010.167.120.101 – 10.167.120.10210.167.120.103
2710.167.120.104/3010.167.120.105 – 10.167.120.10610.167.120.107
2810.167.120.108/3010.167.120.109 – 10.167.120.11010.167.120.111
2910.167.120.112/3010.167.120.113 – 10.167.120.11410.167.120.115
3010.167.120.116/3010.167.120.117 – 10.167.120.11810.167.120.119
3110.167.120.120/3010.167.120.121 – 10.167.120.12210.167.120.123
3210.167.120.124/3010.167.120.125 – 10.167.120.12610.167.120.127
3310.167.120.128/3010.167.120.129 – 10.167.120.13010.167.120.131
3410.167.120.132/3010.167.120.133 – 10.167.120.13410.167.120.135
3510.167.120.136/3010.167.120.137 – 10.167.120.13810.167.120.139
3610.167.120.140/3010.167.120.141 – 10.167.120.14210.167.120.143
3710.167.120.144/3010.167.120.145 – 10.167.120.14610.167.120.147
3810.167.120.148/3010.167.120.149 – 10.167.120.15010.167.120.151
3910.167.120.152/3010.167.120.153 – 10.167.120.15410.167.120.155
4010.167.120.156/3010.167.120.157 – 10.167.120.15810.167.120.159
4110.167.120.160/3010.167.120.161 – 10.167.120.16210.167.120.163
4210.167.120.164/3010.167.120.165 – 10.167.120.16610.167.120.167
4310.167.120.168/3010.167.120.169 – 10.167.120.17010.167.120.171
4410.167.120.172/3010.167.120.173 – 10.167.120.17410.167.120.175
4510.167.120.176/3010.167.120.177 – 10.167.120.17810.167.120.179
4610.167.120.180/3010.167.120.181 – 10.167.120.18210.167.120.183
4710.167.120.184/3010.167.120.185 – 10.167.120.18610.167.120.187
4810.167.120.188/3010.167.120.189 – 10.167.120.19010.167.120.191
4910.167.120.192/3010.167.120.193 – 10.167.120.19410.167.120.195
5010.167.120.196/3010.167.120.197 – 10.167.120.19810.167.120.199
5110.167.120.200/3010.167.120.201 – 10.167.120.20210.167.120.203
5210.167.120.204/3010.167.120.205 – 10.167.120.20610.167.120.207
5310.167.120.208/3010.167.120.209 – 10.167.120.21010.167.120.211
5410.167.120.212/3010.167.120.213 – 10.167.120.21410.167.120.215
5510.167.120.216/3010.167.120.217 – 10.167.120.21810.167.120.219
5610.167.120.220/3010.167.120.221 – 10.167.120.22210.167.120.223
5710.167.120.224/3010.167.120.225 – 10.167.120.22610.167.120.227
5810.167.120.228/3010.167.120.229 – 10.167.120.23010.167.120.231
5910.167.120.232/3010.167.120.233 – 10.167.120.23410.167.120.235
6010.167.120.236/3010.167.120.237 – 10.167.120.23810.167.120.239
6110.167.120.240/3010.167.120.241 – 10.167.120.24210.167.120.243
6210.167.120.244/3010.167.120.245 – 10.167.120.24610.167.120.247
6310.167.120.248/3010.167.120.249 – 10.167.120.25010.167.120.251
6410.167.120.252/3010.167.120.253 – 10.167.120.25410.167.120.255
6510.167.121.0/3010.167.121.1 – 10.167.121.210.167.121.3
6610.167.121.4/3010.167.121.5 – 10.167.121.610.167.121.7
6710.167.121.8/3010.167.121.9 – 10.167.121.1010.167.121.11
6810.167.121.12/3010.167.121.13 – 10.167.121.1410.167.121.15
6910.167.121.16/3010.167.121.17 – 10.167.121.1810.167.121.19
7010.167.121.20/3010.167.121.21 – 10.167.121.2210.167.121.23
7110.167.121.24/3010.167.121.25 – 10.167.121.2610.167.121.27
7210.167.121.28/3010.167.121.29 – 10.167.121.3010.167.121.31
7310.167.121.32/3010.167.121.33 – 10.167.121.3410.167.121.35
7410.167.121.36/3010.167.121.37 – 10.167.121.3810.167.121.39
7510.167.121.40/3010.167.121.41 – 10.167.121.4210.167.121.43
7610.167.121.44/3010.167.121.45 – 10.167.121.4610.167.121.47
7710.167.121.48/3010.167.121.49 – 10.167.121.5010.167.121.51
7810.167.121.52/3010.167.121.53 – 10.167.121.5410.167.121.55
7910.167.121.56/3010.167.121.57 – 10.167.121.5810.167.121.59
8010.167.121.60/3010.167.121.61 – 10.167.121.6210.167.121.63
8110.167.121.64/3010.167.121.65 – 10.167.121.6610.167.121.67
8210.167.121.68/3010.167.121.69 – 10.167.121.7010.167.121.71
8310.167.121.72/3010.167.121.73 – 10.167.121.7410.167.121.75
8410.167.121.76/3010.167.121.77 – 10.167.121.7810.167.121.79
8510.167.121.80/3010.167.121.81 – 10.167.121.8210.167.121.83
8610.167.121.84/3010.167.121.85 – 10.167.121.8610.167.121.87
8710.167.121.88/3010.167.121.89 – 10.167.121.9010.167.121.91
8810.167.121.92/3010.167.121.93 – 10.167.121.9410.167.121.95
8910.167.121.96/3010.167.121.97 – 10.167.121.9810.167.121.99
9010.167.121.100/3010.167.121.101 – 10.167.121.10210.167.121.103
9110.167.121.104/3010.167.121.105 – 10.167.121.10610.167.121.107
9210.167.121.108/3010.167.121.109 – 10.167.121.11010.167.121.111
9310.167.121.112/3010.167.121.113 – 10.167.121.11410.167.121.115
9410.167.121.116/3010.167.121.117 – 10.167.121.11810.167.121.119
9510.167.121.120/3010.167.121.121 – 10.167.121.12210.167.121.123
9610.167.121.124/3010.167.121.125 – 10.167.121.12610.167.121.127
9710.167.121.128/3010.167.121.129 – 10.167.121.13010.167.121.131
9810.167.121.132/3010.167.121.133 – 10.167.121.13410.167.121.135
9910.167.121.136/3010.167.121.137 – 10.167.121.13810.167.121.139
10010.167.121.140/3010.167.121.141 – 10.167.121.14210.167.121.143
10110.167.121.144/3010.167.121.145 – 10.167.121.14610.167.121.147
10210.167.121.148/3010.167.121.149 – 10.167.121.15010.167.121.151
10310.167.121.152/3010.167.121.153 – 10.167.121.15410.167.121.155
10410.167.121.156/3010.167.121.157 – 10.167.121.15810.167.121.159
10510.167.121.160/3010.167.121.161 – 10.167.121.16210.167.121.163
10610.167.121.164/3010.167.121.165 – 10.167.121.16610.167.121.167
10710.167.121.168/3010.167.121.169 – 10.167.121.17010.167.121.171
10810.167.121.172/3010.167.121.173 – 10.167.121.17410.167.121.175
10910.167.121.176/3010.167.121.177 – 10.167.121.17810.167.121.179
11010.167.121.180/3010.167.121.181 – 10.167.121.18210.167.121.183
11110.167.121.184/3010.167.121.185 – 10.167.121.18610.167.121.187
11210.167.121.188/3010.167.121.189 – 10.167.121.19010.167.121.191
11310.167.121.192/3010.167.121.193 – 10.167.121.19410.167.121.195
11410.167.121.196/3010.167.121.197 – 10.167.121.19810.167.121.199
11510.167.121.200/3010.167.121.201 – 10.167.121.20210.167.121.203
11610.167.121.204/3010.167.121.205 – 10.167.121.20610.167.121.207
11710.167.121.208/3010.167.121.209 – 10.167.121.21010.167.121.211
11810.167.121.212/3010.167.121.213 – 10.167.121.21410.167.121.215
11910.167.121.216/3010.167.121.217 – 10.167.121.21810.167.121.219
12010.167.121.220/3010.167.121.221 – 10.167.121.22210.167.121.223
12110.167.121.224/3010.167.121.225 – 10.167.121.22610.167.121.227
12210.167.121.228/3010.167.121.229 – 10.167.121.23010.167.121.231
12310.167.121.232/3010.167.121.233 – 10.167.121.23410.167.121.235
12410.167.121.236/3010.167.121.237 – 10.167.121.23810.167.121.239
12510.167.121.240/3010.167.121.241 – 10.167.121.24210.167.121.243
12610.167.121.244/3010.167.121.245 – 10.167.121.24610.167.121.247
12710.167.121.248/3010.167.121.249 – 10.167.121.25010.167.121.251
12810.167.121.252/3010.167.121.253 – 10.167.121.25410.167.121.255
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 →