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)10.7.136.0/23
network10.7.136.0/23
broadcast10.7.137.255
first host10.7.136.1
last host10.7.137.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.7.136.0/23
address00001010.00000111.10001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000111.10001000.00000000
broadcast00001010.00000111.10001001.11111111
green = network part, grey = host part
hex0x0a078800
decimal168265728
reverse dns0.136.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:8800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.136.0/3010.7.136.1 – 10.7.136.210.7.136.3
210.7.136.4/3010.7.136.5 – 10.7.136.610.7.136.7
310.7.136.8/3010.7.136.9 – 10.7.136.1010.7.136.11
410.7.136.12/3010.7.136.13 – 10.7.136.1410.7.136.15
510.7.136.16/3010.7.136.17 – 10.7.136.1810.7.136.19
610.7.136.20/3010.7.136.21 – 10.7.136.2210.7.136.23
710.7.136.24/3010.7.136.25 – 10.7.136.2610.7.136.27
810.7.136.28/3010.7.136.29 – 10.7.136.3010.7.136.31
910.7.136.32/3010.7.136.33 – 10.7.136.3410.7.136.35
1010.7.136.36/3010.7.136.37 – 10.7.136.3810.7.136.39
1110.7.136.40/3010.7.136.41 – 10.7.136.4210.7.136.43
1210.7.136.44/3010.7.136.45 – 10.7.136.4610.7.136.47
1310.7.136.48/3010.7.136.49 – 10.7.136.5010.7.136.51
1410.7.136.52/3010.7.136.53 – 10.7.136.5410.7.136.55
1510.7.136.56/3010.7.136.57 – 10.7.136.5810.7.136.59
1610.7.136.60/3010.7.136.61 – 10.7.136.6210.7.136.63
1710.7.136.64/3010.7.136.65 – 10.7.136.6610.7.136.67
1810.7.136.68/3010.7.136.69 – 10.7.136.7010.7.136.71
1910.7.136.72/3010.7.136.73 – 10.7.136.7410.7.136.75
2010.7.136.76/3010.7.136.77 – 10.7.136.7810.7.136.79
2110.7.136.80/3010.7.136.81 – 10.7.136.8210.7.136.83
2210.7.136.84/3010.7.136.85 – 10.7.136.8610.7.136.87
2310.7.136.88/3010.7.136.89 – 10.7.136.9010.7.136.91
2410.7.136.92/3010.7.136.93 – 10.7.136.9410.7.136.95
2510.7.136.96/3010.7.136.97 – 10.7.136.9810.7.136.99
2610.7.136.100/3010.7.136.101 – 10.7.136.10210.7.136.103
2710.7.136.104/3010.7.136.105 – 10.7.136.10610.7.136.107
2810.7.136.108/3010.7.136.109 – 10.7.136.11010.7.136.111
2910.7.136.112/3010.7.136.113 – 10.7.136.11410.7.136.115
3010.7.136.116/3010.7.136.117 – 10.7.136.11810.7.136.119
3110.7.136.120/3010.7.136.121 – 10.7.136.12210.7.136.123
3210.7.136.124/3010.7.136.125 – 10.7.136.12610.7.136.127
3310.7.136.128/3010.7.136.129 – 10.7.136.13010.7.136.131
3410.7.136.132/3010.7.136.133 – 10.7.136.13410.7.136.135
3510.7.136.136/3010.7.136.137 – 10.7.136.13810.7.136.139
3610.7.136.140/3010.7.136.141 – 10.7.136.14210.7.136.143
3710.7.136.144/3010.7.136.145 – 10.7.136.14610.7.136.147
3810.7.136.148/3010.7.136.149 – 10.7.136.15010.7.136.151
3910.7.136.152/3010.7.136.153 – 10.7.136.15410.7.136.155
4010.7.136.156/3010.7.136.157 – 10.7.136.15810.7.136.159
4110.7.136.160/3010.7.136.161 – 10.7.136.16210.7.136.163
4210.7.136.164/3010.7.136.165 – 10.7.136.16610.7.136.167
4310.7.136.168/3010.7.136.169 – 10.7.136.17010.7.136.171
4410.7.136.172/3010.7.136.173 – 10.7.136.17410.7.136.175
4510.7.136.176/3010.7.136.177 – 10.7.136.17810.7.136.179
4610.7.136.180/3010.7.136.181 – 10.7.136.18210.7.136.183
4710.7.136.184/3010.7.136.185 – 10.7.136.18610.7.136.187
4810.7.136.188/3010.7.136.189 – 10.7.136.19010.7.136.191
4910.7.136.192/3010.7.136.193 – 10.7.136.19410.7.136.195
5010.7.136.196/3010.7.136.197 – 10.7.136.19810.7.136.199
5110.7.136.200/3010.7.136.201 – 10.7.136.20210.7.136.203
5210.7.136.204/3010.7.136.205 – 10.7.136.20610.7.136.207
5310.7.136.208/3010.7.136.209 – 10.7.136.21010.7.136.211
5410.7.136.212/3010.7.136.213 – 10.7.136.21410.7.136.215
5510.7.136.216/3010.7.136.217 – 10.7.136.21810.7.136.219
5610.7.136.220/3010.7.136.221 – 10.7.136.22210.7.136.223
5710.7.136.224/3010.7.136.225 – 10.7.136.22610.7.136.227
5810.7.136.228/3010.7.136.229 – 10.7.136.23010.7.136.231
5910.7.136.232/3010.7.136.233 – 10.7.136.23410.7.136.235
6010.7.136.236/3010.7.136.237 – 10.7.136.23810.7.136.239
6110.7.136.240/3010.7.136.241 – 10.7.136.24210.7.136.243
6210.7.136.244/3010.7.136.245 – 10.7.136.24610.7.136.247
6310.7.136.248/3010.7.136.249 – 10.7.136.25010.7.136.251
6410.7.136.252/3010.7.136.253 – 10.7.136.25410.7.136.255
6510.7.137.0/3010.7.137.1 – 10.7.137.210.7.137.3
6610.7.137.4/3010.7.137.5 – 10.7.137.610.7.137.7
6710.7.137.8/3010.7.137.9 – 10.7.137.1010.7.137.11
6810.7.137.12/3010.7.137.13 – 10.7.137.1410.7.137.15
6910.7.137.16/3010.7.137.17 – 10.7.137.1810.7.137.19
7010.7.137.20/3010.7.137.21 – 10.7.137.2210.7.137.23
7110.7.137.24/3010.7.137.25 – 10.7.137.2610.7.137.27
7210.7.137.28/3010.7.137.29 – 10.7.137.3010.7.137.31
7310.7.137.32/3010.7.137.33 – 10.7.137.3410.7.137.35
7410.7.137.36/3010.7.137.37 – 10.7.137.3810.7.137.39
7510.7.137.40/3010.7.137.41 – 10.7.137.4210.7.137.43
7610.7.137.44/3010.7.137.45 – 10.7.137.4610.7.137.47
7710.7.137.48/3010.7.137.49 – 10.7.137.5010.7.137.51
7810.7.137.52/3010.7.137.53 – 10.7.137.5410.7.137.55
7910.7.137.56/3010.7.137.57 – 10.7.137.5810.7.137.59
8010.7.137.60/3010.7.137.61 – 10.7.137.6210.7.137.63
8110.7.137.64/3010.7.137.65 – 10.7.137.6610.7.137.67
8210.7.137.68/3010.7.137.69 – 10.7.137.7010.7.137.71
8310.7.137.72/3010.7.137.73 – 10.7.137.7410.7.137.75
8410.7.137.76/3010.7.137.77 – 10.7.137.7810.7.137.79
8510.7.137.80/3010.7.137.81 – 10.7.137.8210.7.137.83
8610.7.137.84/3010.7.137.85 – 10.7.137.8610.7.137.87
8710.7.137.88/3010.7.137.89 – 10.7.137.9010.7.137.91
8810.7.137.92/3010.7.137.93 – 10.7.137.9410.7.137.95
8910.7.137.96/3010.7.137.97 – 10.7.137.9810.7.137.99
9010.7.137.100/3010.7.137.101 – 10.7.137.10210.7.137.103
9110.7.137.104/3010.7.137.105 – 10.7.137.10610.7.137.107
9210.7.137.108/3010.7.137.109 – 10.7.137.11010.7.137.111
9310.7.137.112/3010.7.137.113 – 10.7.137.11410.7.137.115
9410.7.137.116/3010.7.137.117 – 10.7.137.11810.7.137.119
9510.7.137.120/3010.7.137.121 – 10.7.137.12210.7.137.123
9610.7.137.124/3010.7.137.125 – 10.7.137.12610.7.137.127
9710.7.137.128/3010.7.137.129 – 10.7.137.13010.7.137.131
9810.7.137.132/3010.7.137.133 – 10.7.137.13410.7.137.135
9910.7.137.136/3010.7.137.137 – 10.7.137.13810.7.137.139
10010.7.137.140/3010.7.137.141 – 10.7.137.14210.7.137.143
10110.7.137.144/3010.7.137.145 – 10.7.137.14610.7.137.147
10210.7.137.148/3010.7.137.149 – 10.7.137.15010.7.137.151
10310.7.137.152/3010.7.137.153 – 10.7.137.15410.7.137.155
10410.7.137.156/3010.7.137.157 – 10.7.137.15810.7.137.159
10510.7.137.160/3010.7.137.161 – 10.7.137.16210.7.137.163
10610.7.137.164/3010.7.137.165 – 10.7.137.16610.7.137.167
10710.7.137.168/3010.7.137.169 – 10.7.137.17010.7.137.171
10810.7.137.172/3010.7.137.173 – 10.7.137.17410.7.137.175
10910.7.137.176/3010.7.137.177 – 10.7.137.17810.7.137.179
11010.7.137.180/3010.7.137.181 – 10.7.137.18210.7.137.183
11110.7.137.184/3010.7.137.185 – 10.7.137.18610.7.137.187
11210.7.137.188/3010.7.137.189 – 10.7.137.19010.7.137.191
11310.7.137.192/3010.7.137.193 – 10.7.137.19410.7.137.195
11410.7.137.196/3010.7.137.197 – 10.7.137.19810.7.137.199
11510.7.137.200/3010.7.137.201 – 10.7.137.20210.7.137.203
11610.7.137.204/3010.7.137.205 – 10.7.137.20610.7.137.207
11710.7.137.208/3010.7.137.209 – 10.7.137.21010.7.137.211
11810.7.137.212/3010.7.137.213 – 10.7.137.21410.7.137.215
11910.7.137.216/3010.7.137.217 – 10.7.137.21810.7.137.219
12010.7.137.220/3010.7.137.221 – 10.7.137.22210.7.137.223
12110.7.137.224/3010.7.137.225 – 10.7.137.22610.7.137.227
12210.7.137.228/3010.7.137.229 – 10.7.137.23010.7.137.231
12310.7.137.232/3010.7.137.233 – 10.7.137.23410.7.137.235
12410.7.137.236/3010.7.137.237 – 10.7.137.23810.7.137.239
12510.7.137.240/3010.7.137.241 – 10.7.137.24210.7.137.243
12610.7.137.244/3010.7.137.245 – 10.7.137.24610.7.137.247
12710.7.137.248/3010.7.137.249 – 10.7.137.25010.7.137.251
12810.7.137.252/3010.7.137.253 – 10.7.137.25410.7.137.255
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 →