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)10.42.76.0/23
network10.42.76.0/23
broadcast10.42.77.255
first host10.42.76.1
last host10.42.77.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.42.76.0/23
address00001010.00101010.01001100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00101010.01001100.00000000
broadcast00001010.00101010.01001101.11111111
green = network part, grey = host part
hex0x0a2a4c00
decimal170544128
reverse dns0.76.42.10.in-addr.arpa
ipv4-mapped::ffff:a2a:4c00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.42.76.0/3010.42.76.1 – 10.42.76.210.42.76.3
210.42.76.4/3010.42.76.5 – 10.42.76.610.42.76.7
310.42.76.8/3010.42.76.9 – 10.42.76.1010.42.76.11
410.42.76.12/3010.42.76.13 – 10.42.76.1410.42.76.15
510.42.76.16/3010.42.76.17 – 10.42.76.1810.42.76.19
610.42.76.20/3010.42.76.21 – 10.42.76.2210.42.76.23
710.42.76.24/3010.42.76.25 – 10.42.76.2610.42.76.27
810.42.76.28/3010.42.76.29 – 10.42.76.3010.42.76.31
910.42.76.32/3010.42.76.33 – 10.42.76.3410.42.76.35
1010.42.76.36/3010.42.76.37 – 10.42.76.3810.42.76.39
1110.42.76.40/3010.42.76.41 – 10.42.76.4210.42.76.43
1210.42.76.44/3010.42.76.45 – 10.42.76.4610.42.76.47
1310.42.76.48/3010.42.76.49 – 10.42.76.5010.42.76.51
1410.42.76.52/3010.42.76.53 – 10.42.76.5410.42.76.55
1510.42.76.56/3010.42.76.57 – 10.42.76.5810.42.76.59
1610.42.76.60/3010.42.76.61 – 10.42.76.6210.42.76.63
1710.42.76.64/3010.42.76.65 – 10.42.76.6610.42.76.67
1810.42.76.68/3010.42.76.69 – 10.42.76.7010.42.76.71
1910.42.76.72/3010.42.76.73 – 10.42.76.7410.42.76.75
2010.42.76.76/3010.42.76.77 – 10.42.76.7810.42.76.79
2110.42.76.80/3010.42.76.81 – 10.42.76.8210.42.76.83
2210.42.76.84/3010.42.76.85 – 10.42.76.8610.42.76.87
2310.42.76.88/3010.42.76.89 – 10.42.76.9010.42.76.91
2410.42.76.92/3010.42.76.93 – 10.42.76.9410.42.76.95
2510.42.76.96/3010.42.76.97 – 10.42.76.9810.42.76.99
2610.42.76.100/3010.42.76.101 – 10.42.76.10210.42.76.103
2710.42.76.104/3010.42.76.105 – 10.42.76.10610.42.76.107
2810.42.76.108/3010.42.76.109 – 10.42.76.11010.42.76.111
2910.42.76.112/3010.42.76.113 – 10.42.76.11410.42.76.115
3010.42.76.116/3010.42.76.117 – 10.42.76.11810.42.76.119
3110.42.76.120/3010.42.76.121 – 10.42.76.12210.42.76.123
3210.42.76.124/3010.42.76.125 – 10.42.76.12610.42.76.127
3310.42.76.128/3010.42.76.129 – 10.42.76.13010.42.76.131
3410.42.76.132/3010.42.76.133 – 10.42.76.13410.42.76.135
3510.42.76.136/3010.42.76.137 – 10.42.76.13810.42.76.139
3610.42.76.140/3010.42.76.141 – 10.42.76.14210.42.76.143
3710.42.76.144/3010.42.76.145 – 10.42.76.14610.42.76.147
3810.42.76.148/3010.42.76.149 – 10.42.76.15010.42.76.151
3910.42.76.152/3010.42.76.153 – 10.42.76.15410.42.76.155
4010.42.76.156/3010.42.76.157 – 10.42.76.15810.42.76.159
4110.42.76.160/3010.42.76.161 – 10.42.76.16210.42.76.163
4210.42.76.164/3010.42.76.165 – 10.42.76.16610.42.76.167
4310.42.76.168/3010.42.76.169 – 10.42.76.17010.42.76.171
4410.42.76.172/3010.42.76.173 – 10.42.76.17410.42.76.175
4510.42.76.176/3010.42.76.177 – 10.42.76.17810.42.76.179
4610.42.76.180/3010.42.76.181 – 10.42.76.18210.42.76.183
4710.42.76.184/3010.42.76.185 – 10.42.76.18610.42.76.187
4810.42.76.188/3010.42.76.189 – 10.42.76.19010.42.76.191
4910.42.76.192/3010.42.76.193 – 10.42.76.19410.42.76.195
5010.42.76.196/3010.42.76.197 – 10.42.76.19810.42.76.199
5110.42.76.200/3010.42.76.201 – 10.42.76.20210.42.76.203
5210.42.76.204/3010.42.76.205 – 10.42.76.20610.42.76.207
5310.42.76.208/3010.42.76.209 – 10.42.76.21010.42.76.211
5410.42.76.212/3010.42.76.213 – 10.42.76.21410.42.76.215
5510.42.76.216/3010.42.76.217 – 10.42.76.21810.42.76.219
5610.42.76.220/3010.42.76.221 – 10.42.76.22210.42.76.223
5710.42.76.224/3010.42.76.225 – 10.42.76.22610.42.76.227
5810.42.76.228/3010.42.76.229 – 10.42.76.23010.42.76.231
5910.42.76.232/3010.42.76.233 – 10.42.76.23410.42.76.235
6010.42.76.236/3010.42.76.237 – 10.42.76.23810.42.76.239
6110.42.76.240/3010.42.76.241 – 10.42.76.24210.42.76.243
6210.42.76.244/3010.42.76.245 – 10.42.76.24610.42.76.247
6310.42.76.248/3010.42.76.249 – 10.42.76.25010.42.76.251
6410.42.76.252/3010.42.76.253 – 10.42.76.25410.42.76.255
6510.42.77.0/3010.42.77.1 – 10.42.77.210.42.77.3
6610.42.77.4/3010.42.77.5 – 10.42.77.610.42.77.7
6710.42.77.8/3010.42.77.9 – 10.42.77.1010.42.77.11
6810.42.77.12/3010.42.77.13 – 10.42.77.1410.42.77.15
6910.42.77.16/3010.42.77.17 – 10.42.77.1810.42.77.19
7010.42.77.20/3010.42.77.21 – 10.42.77.2210.42.77.23
7110.42.77.24/3010.42.77.25 – 10.42.77.2610.42.77.27
7210.42.77.28/3010.42.77.29 – 10.42.77.3010.42.77.31
7310.42.77.32/3010.42.77.33 – 10.42.77.3410.42.77.35
7410.42.77.36/3010.42.77.37 – 10.42.77.3810.42.77.39
7510.42.77.40/3010.42.77.41 – 10.42.77.4210.42.77.43
7610.42.77.44/3010.42.77.45 – 10.42.77.4610.42.77.47
7710.42.77.48/3010.42.77.49 – 10.42.77.5010.42.77.51
7810.42.77.52/3010.42.77.53 – 10.42.77.5410.42.77.55
7910.42.77.56/3010.42.77.57 – 10.42.77.5810.42.77.59
8010.42.77.60/3010.42.77.61 – 10.42.77.6210.42.77.63
8110.42.77.64/3010.42.77.65 – 10.42.77.6610.42.77.67
8210.42.77.68/3010.42.77.69 – 10.42.77.7010.42.77.71
8310.42.77.72/3010.42.77.73 – 10.42.77.7410.42.77.75
8410.42.77.76/3010.42.77.77 – 10.42.77.7810.42.77.79
8510.42.77.80/3010.42.77.81 – 10.42.77.8210.42.77.83
8610.42.77.84/3010.42.77.85 – 10.42.77.8610.42.77.87
8710.42.77.88/3010.42.77.89 – 10.42.77.9010.42.77.91
8810.42.77.92/3010.42.77.93 – 10.42.77.9410.42.77.95
8910.42.77.96/3010.42.77.97 – 10.42.77.9810.42.77.99
9010.42.77.100/3010.42.77.101 – 10.42.77.10210.42.77.103
9110.42.77.104/3010.42.77.105 – 10.42.77.10610.42.77.107
9210.42.77.108/3010.42.77.109 – 10.42.77.11010.42.77.111
9310.42.77.112/3010.42.77.113 – 10.42.77.11410.42.77.115
9410.42.77.116/3010.42.77.117 – 10.42.77.11810.42.77.119
9510.42.77.120/3010.42.77.121 – 10.42.77.12210.42.77.123
9610.42.77.124/3010.42.77.125 – 10.42.77.12610.42.77.127
9710.42.77.128/3010.42.77.129 – 10.42.77.13010.42.77.131
9810.42.77.132/3010.42.77.133 – 10.42.77.13410.42.77.135
9910.42.77.136/3010.42.77.137 – 10.42.77.13810.42.77.139
10010.42.77.140/3010.42.77.141 – 10.42.77.14210.42.77.143
10110.42.77.144/3010.42.77.145 – 10.42.77.14610.42.77.147
10210.42.77.148/3010.42.77.149 – 10.42.77.15010.42.77.151
10310.42.77.152/3010.42.77.153 – 10.42.77.15410.42.77.155
10410.42.77.156/3010.42.77.157 – 10.42.77.15810.42.77.159
10510.42.77.160/3010.42.77.161 – 10.42.77.16210.42.77.163
10610.42.77.164/3010.42.77.165 – 10.42.77.16610.42.77.167
10710.42.77.168/3010.42.77.169 – 10.42.77.17010.42.77.171
10810.42.77.172/3010.42.77.173 – 10.42.77.17410.42.77.175
10910.42.77.176/3010.42.77.177 – 10.42.77.17810.42.77.179
11010.42.77.180/3010.42.77.181 – 10.42.77.18210.42.77.183
11110.42.77.184/3010.42.77.185 – 10.42.77.18610.42.77.187
11210.42.77.188/3010.42.77.189 – 10.42.77.19010.42.77.191
11310.42.77.192/3010.42.77.193 – 10.42.77.19410.42.77.195
11410.42.77.196/3010.42.77.197 – 10.42.77.19810.42.77.199
11510.42.77.200/3010.42.77.201 – 10.42.77.20210.42.77.203
11610.42.77.204/3010.42.77.205 – 10.42.77.20610.42.77.207
11710.42.77.208/3010.42.77.209 – 10.42.77.21010.42.77.211
11810.42.77.212/3010.42.77.213 – 10.42.77.21410.42.77.215
11910.42.77.216/3010.42.77.217 – 10.42.77.21810.42.77.219
12010.42.77.220/3010.42.77.221 – 10.42.77.22210.42.77.223
12110.42.77.224/3010.42.77.225 – 10.42.77.22610.42.77.227
12210.42.77.228/3010.42.77.229 – 10.42.77.23010.42.77.231
12310.42.77.232/3010.42.77.233 – 10.42.77.23410.42.77.235
12410.42.77.236/3010.42.77.237 – 10.42.77.23810.42.77.239
12510.42.77.240/3010.42.77.241 – 10.42.77.24210.42.77.243
12610.42.77.244/3010.42.77.245 – 10.42.77.24610.42.77.247
12710.42.77.248/3010.42.77.249 – 10.42.77.25010.42.77.251
12810.42.77.252/3010.42.77.253 – 10.42.77.25410.42.77.255
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 →