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)10.2.254.0/23
network10.2.254.0/23
broadcast10.2.255.255
first host10.2.254.1
last host10.2.255.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.2.254.0/23
address00001010.00000010.11111110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000010.11111110.00000000
broadcast00001010.00000010.11111111.11111111
green = network part, grey = host part
hex0x0a02fe00
decimal167968256
reverse dns0.254.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:fe00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.254.0/3010.2.254.1 – 10.2.254.210.2.254.3
210.2.254.4/3010.2.254.5 – 10.2.254.610.2.254.7
310.2.254.8/3010.2.254.9 – 10.2.254.1010.2.254.11
410.2.254.12/3010.2.254.13 – 10.2.254.1410.2.254.15
510.2.254.16/3010.2.254.17 – 10.2.254.1810.2.254.19
610.2.254.20/3010.2.254.21 – 10.2.254.2210.2.254.23
710.2.254.24/3010.2.254.25 – 10.2.254.2610.2.254.27
810.2.254.28/3010.2.254.29 – 10.2.254.3010.2.254.31
910.2.254.32/3010.2.254.33 – 10.2.254.3410.2.254.35
1010.2.254.36/3010.2.254.37 – 10.2.254.3810.2.254.39
1110.2.254.40/3010.2.254.41 – 10.2.254.4210.2.254.43
1210.2.254.44/3010.2.254.45 – 10.2.254.4610.2.254.47
1310.2.254.48/3010.2.254.49 – 10.2.254.5010.2.254.51
1410.2.254.52/3010.2.254.53 – 10.2.254.5410.2.254.55
1510.2.254.56/3010.2.254.57 – 10.2.254.5810.2.254.59
1610.2.254.60/3010.2.254.61 – 10.2.254.6210.2.254.63
1710.2.254.64/3010.2.254.65 – 10.2.254.6610.2.254.67
1810.2.254.68/3010.2.254.69 – 10.2.254.7010.2.254.71
1910.2.254.72/3010.2.254.73 – 10.2.254.7410.2.254.75
2010.2.254.76/3010.2.254.77 – 10.2.254.7810.2.254.79
2110.2.254.80/3010.2.254.81 – 10.2.254.8210.2.254.83
2210.2.254.84/3010.2.254.85 – 10.2.254.8610.2.254.87
2310.2.254.88/3010.2.254.89 – 10.2.254.9010.2.254.91
2410.2.254.92/3010.2.254.93 – 10.2.254.9410.2.254.95
2510.2.254.96/3010.2.254.97 – 10.2.254.9810.2.254.99
2610.2.254.100/3010.2.254.101 – 10.2.254.10210.2.254.103
2710.2.254.104/3010.2.254.105 – 10.2.254.10610.2.254.107
2810.2.254.108/3010.2.254.109 – 10.2.254.11010.2.254.111
2910.2.254.112/3010.2.254.113 – 10.2.254.11410.2.254.115
3010.2.254.116/3010.2.254.117 – 10.2.254.11810.2.254.119
3110.2.254.120/3010.2.254.121 – 10.2.254.12210.2.254.123
3210.2.254.124/3010.2.254.125 – 10.2.254.12610.2.254.127
3310.2.254.128/3010.2.254.129 – 10.2.254.13010.2.254.131
3410.2.254.132/3010.2.254.133 – 10.2.254.13410.2.254.135
3510.2.254.136/3010.2.254.137 – 10.2.254.13810.2.254.139
3610.2.254.140/3010.2.254.141 – 10.2.254.14210.2.254.143
3710.2.254.144/3010.2.254.145 – 10.2.254.14610.2.254.147
3810.2.254.148/3010.2.254.149 – 10.2.254.15010.2.254.151
3910.2.254.152/3010.2.254.153 – 10.2.254.15410.2.254.155
4010.2.254.156/3010.2.254.157 – 10.2.254.15810.2.254.159
4110.2.254.160/3010.2.254.161 – 10.2.254.16210.2.254.163
4210.2.254.164/3010.2.254.165 – 10.2.254.16610.2.254.167
4310.2.254.168/3010.2.254.169 – 10.2.254.17010.2.254.171
4410.2.254.172/3010.2.254.173 – 10.2.254.17410.2.254.175
4510.2.254.176/3010.2.254.177 – 10.2.254.17810.2.254.179
4610.2.254.180/3010.2.254.181 – 10.2.254.18210.2.254.183
4710.2.254.184/3010.2.254.185 – 10.2.254.18610.2.254.187
4810.2.254.188/3010.2.254.189 – 10.2.254.19010.2.254.191
4910.2.254.192/3010.2.254.193 – 10.2.254.19410.2.254.195
5010.2.254.196/3010.2.254.197 – 10.2.254.19810.2.254.199
5110.2.254.200/3010.2.254.201 – 10.2.254.20210.2.254.203
5210.2.254.204/3010.2.254.205 – 10.2.254.20610.2.254.207
5310.2.254.208/3010.2.254.209 – 10.2.254.21010.2.254.211
5410.2.254.212/3010.2.254.213 – 10.2.254.21410.2.254.215
5510.2.254.216/3010.2.254.217 – 10.2.254.21810.2.254.219
5610.2.254.220/3010.2.254.221 – 10.2.254.22210.2.254.223
5710.2.254.224/3010.2.254.225 – 10.2.254.22610.2.254.227
5810.2.254.228/3010.2.254.229 – 10.2.254.23010.2.254.231
5910.2.254.232/3010.2.254.233 – 10.2.254.23410.2.254.235
6010.2.254.236/3010.2.254.237 – 10.2.254.23810.2.254.239
6110.2.254.240/3010.2.254.241 – 10.2.254.24210.2.254.243
6210.2.254.244/3010.2.254.245 – 10.2.254.24610.2.254.247
6310.2.254.248/3010.2.254.249 – 10.2.254.25010.2.254.251
6410.2.254.252/3010.2.254.253 – 10.2.254.25410.2.254.255
6510.2.255.0/3010.2.255.1 – 10.2.255.210.2.255.3
6610.2.255.4/3010.2.255.5 – 10.2.255.610.2.255.7
6710.2.255.8/3010.2.255.9 – 10.2.255.1010.2.255.11
6810.2.255.12/3010.2.255.13 – 10.2.255.1410.2.255.15
6910.2.255.16/3010.2.255.17 – 10.2.255.1810.2.255.19
7010.2.255.20/3010.2.255.21 – 10.2.255.2210.2.255.23
7110.2.255.24/3010.2.255.25 – 10.2.255.2610.2.255.27
7210.2.255.28/3010.2.255.29 – 10.2.255.3010.2.255.31
7310.2.255.32/3010.2.255.33 – 10.2.255.3410.2.255.35
7410.2.255.36/3010.2.255.37 – 10.2.255.3810.2.255.39
7510.2.255.40/3010.2.255.41 – 10.2.255.4210.2.255.43
7610.2.255.44/3010.2.255.45 – 10.2.255.4610.2.255.47
7710.2.255.48/3010.2.255.49 – 10.2.255.5010.2.255.51
7810.2.255.52/3010.2.255.53 – 10.2.255.5410.2.255.55
7910.2.255.56/3010.2.255.57 – 10.2.255.5810.2.255.59
8010.2.255.60/3010.2.255.61 – 10.2.255.6210.2.255.63
8110.2.255.64/3010.2.255.65 – 10.2.255.6610.2.255.67
8210.2.255.68/3010.2.255.69 – 10.2.255.7010.2.255.71
8310.2.255.72/3010.2.255.73 – 10.2.255.7410.2.255.75
8410.2.255.76/3010.2.255.77 – 10.2.255.7810.2.255.79
8510.2.255.80/3010.2.255.81 – 10.2.255.8210.2.255.83
8610.2.255.84/3010.2.255.85 – 10.2.255.8610.2.255.87
8710.2.255.88/3010.2.255.89 – 10.2.255.9010.2.255.91
8810.2.255.92/3010.2.255.93 – 10.2.255.9410.2.255.95
8910.2.255.96/3010.2.255.97 – 10.2.255.9810.2.255.99
9010.2.255.100/3010.2.255.101 – 10.2.255.10210.2.255.103
9110.2.255.104/3010.2.255.105 – 10.2.255.10610.2.255.107
9210.2.255.108/3010.2.255.109 – 10.2.255.11010.2.255.111
9310.2.255.112/3010.2.255.113 – 10.2.255.11410.2.255.115
9410.2.255.116/3010.2.255.117 – 10.2.255.11810.2.255.119
9510.2.255.120/3010.2.255.121 – 10.2.255.12210.2.255.123
9610.2.255.124/3010.2.255.125 – 10.2.255.12610.2.255.127
9710.2.255.128/3010.2.255.129 – 10.2.255.13010.2.255.131
9810.2.255.132/3010.2.255.133 – 10.2.255.13410.2.255.135
9910.2.255.136/3010.2.255.137 – 10.2.255.13810.2.255.139
10010.2.255.140/3010.2.255.141 – 10.2.255.14210.2.255.143
10110.2.255.144/3010.2.255.145 – 10.2.255.14610.2.255.147
10210.2.255.148/3010.2.255.149 – 10.2.255.15010.2.255.151
10310.2.255.152/3010.2.255.153 – 10.2.255.15410.2.255.155
10410.2.255.156/3010.2.255.157 – 10.2.255.15810.2.255.159
10510.2.255.160/3010.2.255.161 – 10.2.255.16210.2.255.163
10610.2.255.164/3010.2.255.165 – 10.2.255.16610.2.255.167
10710.2.255.168/3010.2.255.169 – 10.2.255.17010.2.255.171
10810.2.255.172/3010.2.255.173 – 10.2.255.17410.2.255.175
10910.2.255.176/3010.2.255.177 – 10.2.255.17810.2.255.179
11010.2.255.180/3010.2.255.181 – 10.2.255.18210.2.255.183
11110.2.255.184/3010.2.255.185 – 10.2.255.18610.2.255.187
11210.2.255.188/3010.2.255.189 – 10.2.255.19010.2.255.191
11310.2.255.192/3010.2.255.193 – 10.2.255.19410.2.255.195
11410.2.255.196/3010.2.255.197 – 10.2.255.19810.2.255.199
11510.2.255.200/3010.2.255.201 – 10.2.255.20210.2.255.203
11610.2.255.204/3010.2.255.205 – 10.2.255.20610.2.255.207
11710.2.255.208/3010.2.255.209 – 10.2.255.21010.2.255.211
11810.2.255.212/3010.2.255.213 – 10.2.255.21410.2.255.215
11910.2.255.216/3010.2.255.217 – 10.2.255.21810.2.255.219
12010.2.255.220/3010.2.255.221 – 10.2.255.22210.2.255.223
12110.2.255.224/3010.2.255.225 – 10.2.255.22610.2.255.227
12210.2.255.228/3010.2.255.229 – 10.2.255.23010.2.255.231
12310.2.255.232/3010.2.255.233 – 10.2.255.23410.2.255.235
12410.2.255.236/3010.2.255.237 – 10.2.255.23810.2.255.239
12510.2.255.240/3010.2.255.241 – 10.2.255.24210.2.255.243
12610.2.255.244/3010.2.255.245 – 10.2.255.24610.2.255.247
12710.2.255.248/3010.2.255.249 – 10.2.255.25010.2.255.251
12810.2.255.252/3010.2.255.253 – 10.2.255.25410.2.255.255
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 →