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)10.65.252.0/23
network10.65.252.0/23
broadcast10.65.253.255
first host10.65.252.1
last host10.65.253.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.65.252.0/23
address00001010.01000001.11111100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000001.11111100.00000000
broadcast00001010.01000001.11111101.11111111
green = network part, grey = host part
hex0x0a41fc00
decimal172096512
reverse dns0.252.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:fc00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.65.252.0/3010.65.252.1 – 10.65.252.210.65.252.3
210.65.252.4/3010.65.252.5 – 10.65.252.610.65.252.7
310.65.252.8/3010.65.252.9 – 10.65.252.1010.65.252.11
410.65.252.12/3010.65.252.13 – 10.65.252.1410.65.252.15
510.65.252.16/3010.65.252.17 – 10.65.252.1810.65.252.19
610.65.252.20/3010.65.252.21 – 10.65.252.2210.65.252.23
710.65.252.24/3010.65.252.25 – 10.65.252.2610.65.252.27
810.65.252.28/3010.65.252.29 – 10.65.252.3010.65.252.31
910.65.252.32/3010.65.252.33 – 10.65.252.3410.65.252.35
1010.65.252.36/3010.65.252.37 – 10.65.252.3810.65.252.39
1110.65.252.40/3010.65.252.41 – 10.65.252.4210.65.252.43
1210.65.252.44/3010.65.252.45 – 10.65.252.4610.65.252.47
1310.65.252.48/3010.65.252.49 – 10.65.252.5010.65.252.51
1410.65.252.52/3010.65.252.53 – 10.65.252.5410.65.252.55
1510.65.252.56/3010.65.252.57 – 10.65.252.5810.65.252.59
1610.65.252.60/3010.65.252.61 – 10.65.252.6210.65.252.63
1710.65.252.64/3010.65.252.65 – 10.65.252.6610.65.252.67
1810.65.252.68/3010.65.252.69 – 10.65.252.7010.65.252.71
1910.65.252.72/3010.65.252.73 – 10.65.252.7410.65.252.75
2010.65.252.76/3010.65.252.77 – 10.65.252.7810.65.252.79
2110.65.252.80/3010.65.252.81 – 10.65.252.8210.65.252.83
2210.65.252.84/3010.65.252.85 – 10.65.252.8610.65.252.87
2310.65.252.88/3010.65.252.89 – 10.65.252.9010.65.252.91
2410.65.252.92/3010.65.252.93 – 10.65.252.9410.65.252.95
2510.65.252.96/3010.65.252.97 – 10.65.252.9810.65.252.99
2610.65.252.100/3010.65.252.101 – 10.65.252.10210.65.252.103
2710.65.252.104/3010.65.252.105 – 10.65.252.10610.65.252.107
2810.65.252.108/3010.65.252.109 – 10.65.252.11010.65.252.111
2910.65.252.112/3010.65.252.113 – 10.65.252.11410.65.252.115
3010.65.252.116/3010.65.252.117 – 10.65.252.11810.65.252.119
3110.65.252.120/3010.65.252.121 – 10.65.252.12210.65.252.123
3210.65.252.124/3010.65.252.125 – 10.65.252.12610.65.252.127
3310.65.252.128/3010.65.252.129 – 10.65.252.13010.65.252.131
3410.65.252.132/3010.65.252.133 – 10.65.252.13410.65.252.135
3510.65.252.136/3010.65.252.137 – 10.65.252.13810.65.252.139
3610.65.252.140/3010.65.252.141 – 10.65.252.14210.65.252.143
3710.65.252.144/3010.65.252.145 – 10.65.252.14610.65.252.147
3810.65.252.148/3010.65.252.149 – 10.65.252.15010.65.252.151
3910.65.252.152/3010.65.252.153 – 10.65.252.15410.65.252.155
4010.65.252.156/3010.65.252.157 – 10.65.252.15810.65.252.159
4110.65.252.160/3010.65.252.161 – 10.65.252.16210.65.252.163
4210.65.252.164/3010.65.252.165 – 10.65.252.16610.65.252.167
4310.65.252.168/3010.65.252.169 – 10.65.252.17010.65.252.171
4410.65.252.172/3010.65.252.173 – 10.65.252.17410.65.252.175
4510.65.252.176/3010.65.252.177 – 10.65.252.17810.65.252.179
4610.65.252.180/3010.65.252.181 – 10.65.252.18210.65.252.183
4710.65.252.184/3010.65.252.185 – 10.65.252.18610.65.252.187
4810.65.252.188/3010.65.252.189 – 10.65.252.19010.65.252.191
4910.65.252.192/3010.65.252.193 – 10.65.252.19410.65.252.195
5010.65.252.196/3010.65.252.197 – 10.65.252.19810.65.252.199
5110.65.252.200/3010.65.252.201 – 10.65.252.20210.65.252.203
5210.65.252.204/3010.65.252.205 – 10.65.252.20610.65.252.207
5310.65.252.208/3010.65.252.209 – 10.65.252.21010.65.252.211
5410.65.252.212/3010.65.252.213 – 10.65.252.21410.65.252.215
5510.65.252.216/3010.65.252.217 – 10.65.252.21810.65.252.219
5610.65.252.220/3010.65.252.221 – 10.65.252.22210.65.252.223
5710.65.252.224/3010.65.252.225 – 10.65.252.22610.65.252.227
5810.65.252.228/3010.65.252.229 – 10.65.252.23010.65.252.231
5910.65.252.232/3010.65.252.233 – 10.65.252.23410.65.252.235
6010.65.252.236/3010.65.252.237 – 10.65.252.23810.65.252.239
6110.65.252.240/3010.65.252.241 – 10.65.252.24210.65.252.243
6210.65.252.244/3010.65.252.245 – 10.65.252.24610.65.252.247
6310.65.252.248/3010.65.252.249 – 10.65.252.25010.65.252.251
6410.65.252.252/3010.65.252.253 – 10.65.252.25410.65.252.255
6510.65.253.0/3010.65.253.1 – 10.65.253.210.65.253.3
6610.65.253.4/3010.65.253.5 – 10.65.253.610.65.253.7
6710.65.253.8/3010.65.253.9 – 10.65.253.1010.65.253.11
6810.65.253.12/3010.65.253.13 – 10.65.253.1410.65.253.15
6910.65.253.16/3010.65.253.17 – 10.65.253.1810.65.253.19
7010.65.253.20/3010.65.253.21 – 10.65.253.2210.65.253.23
7110.65.253.24/3010.65.253.25 – 10.65.253.2610.65.253.27
7210.65.253.28/3010.65.253.29 – 10.65.253.3010.65.253.31
7310.65.253.32/3010.65.253.33 – 10.65.253.3410.65.253.35
7410.65.253.36/3010.65.253.37 – 10.65.253.3810.65.253.39
7510.65.253.40/3010.65.253.41 – 10.65.253.4210.65.253.43
7610.65.253.44/3010.65.253.45 – 10.65.253.4610.65.253.47
7710.65.253.48/3010.65.253.49 – 10.65.253.5010.65.253.51
7810.65.253.52/3010.65.253.53 – 10.65.253.5410.65.253.55
7910.65.253.56/3010.65.253.57 – 10.65.253.5810.65.253.59
8010.65.253.60/3010.65.253.61 – 10.65.253.6210.65.253.63
8110.65.253.64/3010.65.253.65 – 10.65.253.6610.65.253.67
8210.65.253.68/3010.65.253.69 – 10.65.253.7010.65.253.71
8310.65.253.72/3010.65.253.73 – 10.65.253.7410.65.253.75
8410.65.253.76/3010.65.253.77 – 10.65.253.7810.65.253.79
8510.65.253.80/3010.65.253.81 – 10.65.253.8210.65.253.83
8610.65.253.84/3010.65.253.85 – 10.65.253.8610.65.253.87
8710.65.253.88/3010.65.253.89 – 10.65.253.9010.65.253.91
8810.65.253.92/3010.65.253.93 – 10.65.253.9410.65.253.95
8910.65.253.96/3010.65.253.97 – 10.65.253.9810.65.253.99
9010.65.253.100/3010.65.253.101 – 10.65.253.10210.65.253.103
9110.65.253.104/3010.65.253.105 – 10.65.253.10610.65.253.107
9210.65.253.108/3010.65.253.109 – 10.65.253.11010.65.253.111
9310.65.253.112/3010.65.253.113 – 10.65.253.11410.65.253.115
9410.65.253.116/3010.65.253.117 – 10.65.253.11810.65.253.119
9510.65.253.120/3010.65.253.121 – 10.65.253.12210.65.253.123
9610.65.253.124/3010.65.253.125 – 10.65.253.12610.65.253.127
9710.65.253.128/3010.65.253.129 – 10.65.253.13010.65.253.131
9810.65.253.132/3010.65.253.133 – 10.65.253.13410.65.253.135
9910.65.253.136/3010.65.253.137 – 10.65.253.13810.65.253.139
10010.65.253.140/3010.65.253.141 – 10.65.253.14210.65.253.143
10110.65.253.144/3010.65.253.145 – 10.65.253.14610.65.253.147
10210.65.253.148/3010.65.253.149 – 10.65.253.15010.65.253.151
10310.65.253.152/3010.65.253.153 – 10.65.253.15410.65.253.155
10410.65.253.156/3010.65.253.157 – 10.65.253.15810.65.253.159
10510.65.253.160/3010.65.253.161 – 10.65.253.16210.65.253.163
10610.65.253.164/3010.65.253.165 – 10.65.253.16610.65.253.167
10710.65.253.168/3010.65.253.169 – 10.65.253.17010.65.253.171
10810.65.253.172/3010.65.253.173 – 10.65.253.17410.65.253.175
10910.65.253.176/3010.65.253.177 – 10.65.253.17810.65.253.179
11010.65.253.180/3010.65.253.181 – 10.65.253.18210.65.253.183
11110.65.253.184/3010.65.253.185 – 10.65.253.18610.65.253.187
11210.65.253.188/3010.65.253.189 – 10.65.253.19010.65.253.191
11310.65.253.192/3010.65.253.193 – 10.65.253.19410.65.253.195
11410.65.253.196/3010.65.253.197 – 10.65.253.19810.65.253.199
11510.65.253.200/3010.65.253.201 – 10.65.253.20210.65.253.203
11610.65.253.204/3010.65.253.205 – 10.65.253.20610.65.253.207
11710.65.253.208/3010.65.253.209 – 10.65.253.21010.65.253.211
11810.65.253.212/3010.65.253.213 – 10.65.253.21410.65.253.215
11910.65.253.216/3010.65.253.217 – 10.65.253.21810.65.253.219
12010.65.253.220/3010.65.253.221 – 10.65.253.22210.65.253.223
12110.65.253.224/3010.65.253.225 – 10.65.253.22610.65.253.227
12210.65.253.228/3010.65.253.229 – 10.65.253.23010.65.253.231
12310.65.253.232/3010.65.253.233 – 10.65.253.23410.65.253.235
12410.65.253.236/3010.65.253.237 – 10.65.253.23810.65.253.239
12510.65.253.240/3010.65.253.241 – 10.65.253.24210.65.253.243
12610.65.253.244/3010.65.253.245 – 10.65.253.24610.65.253.247
12710.65.253.248/3010.65.253.249 – 10.65.253.25010.65.253.251
12810.65.253.252/3010.65.253.253 – 10.65.253.25410.65.253.255
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 →