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)10.71.34.0/23
network10.71.34.0/23
broadcast10.71.35.255
first host10.71.34.1
last host10.71.35.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.71.34.0/23
address00001010.01000111.00100010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000111.00100010.00000000
broadcast00001010.01000111.00100011.11111111
green = network part, grey = host part
hex0x0a472200
decimal172433920
reverse dns0.34.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:2200

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.71.34.0/3010.71.34.1 – 10.71.34.210.71.34.3
210.71.34.4/3010.71.34.5 – 10.71.34.610.71.34.7
310.71.34.8/3010.71.34.9 – 10.71.34.1010.71.34.11
410.71.34.12/3010.71.34.13 – 10.71.34.1410.71.34.15
510.71.34.16/3010.71.34.17 – 10.71.34.1810.71.34.19
610.71.34.20/3010.71.34.21 – 10.71.34.2210.71.34.23
710.71.34.24/3010.71.34.25 – 10.71.34.2610.71.34.27
810.71.34.28/3010.71.34.29 – 10.71.34.3010.71.34.31
910.71.34.32/3010.71.34.33 – 10.71.34.3410.71.34.35
1010.71.34.36/3010.71.34.37 – 10.71.34.3810.71.34.39
1110.71.34.40/3010.71.34.41 – 10.71.34.4210.71.34.43
1210.71.34.44/3010.71.34.45 – 10.71.34.4610.71.34.47
1310.71.34.48/3010.71.34.49 – 10.71.34.5010.71.34.51
1410.71.34.52/3010.71.34.53 – 10.71.34.5410.71.34.55
1510.71.34.56/3010.71.34.57 – 10.71.34.5810.71.34.59
1610.71.34.60/3010.71.34.61 – 10.71.34.6210.71.34.63
1710.71.34.64/3010.71.34.65 – 10.71.34.6610.71.34.67
1810.71.34.68/3010.71.34.69 – 10.71.34.7010.71.34.71
1910.71.34.72/3010.71.34.73 – 10.71.34.7410.71.34.75
2010.71.34.76/3010.71.34.77 – 10.71.34.7810.71.34.79
2110.71.34.80/3010.71.34.81 – 10.71.34.8210.71.34.83
2210.71.34.84/3010.71.34.85 – 10.71.34.8610.71.34.87
2310.71.34.88/3010.71.34.89 – 10.71.34.9010.71.34.91
2410.71.34.92/3010.71.34.93 – 10.71.34.9410.71.34.95
2510.71.34.96/3010.71.34.97 – 10.71.34.9810.71.34.99
2610.71.34.100/3010.71.34.101 – 10.71.34.10210.71.34.103
2710.71.34.104/3010.71.34.105 – 10.71.34.10610.71.34.107
2810.71.34.108/3010.71.34.109 – 10.71.34.11010.71.34.111
2910.71.34.112/3010.71.34.113 – 10.71.34.11410.71.34.115
3010.71.34.116/3010.71.34.117 – 10.71.34.11810.71.34.119
3110.71.34.120/3010.71.34.121 – 10.71.34.12210.71.34.123
3210.71.34.124/3010.71.34.125 – 10.71.34.12610.71.34.127
3310.71.34.128/3010.71.34.129 – 10.71.34.13010.71.34.131
3410.71.34.132/3010.71.34.133 – 10.71.34.13410.71.34.135
3510.71.34.136/3010.71.34.137 – 10.71.34.13810.71.34.139
3610.71.34.140/3010.71.34.141 – 10.71.34.14210.71.34.143
3710.71.34.144/3010.71.34.145 – 10.71.34.14610.71.34.147
3810.71.34.148/3010.71.34.149 – 10.71.34.15010.71.34.151
3910.71.34.152/3010.71.34.153 – 10.71.34.15410.71.34.155
4010.71.34.156/3010.71.34.157 – 10.71.34.15810.71.34.159
4110.71.34.160/3010.71.34.161 – 10.71.34.16210.71.34.163
4210.71.34.164/3010.71.34.165 – 10.71.34.16610.71.34.167
4310.71.34.168/3010.71.34.169 – 10.71.34.17010.71.34.171
4410.71.34.172/3010.71.34.173 – 10.71.34.17410.71.34.175
4510.71.34.176/3010.71.34.177 – 10.71.34.17810.71.34.179
4610.71.34.180/3010.71.34.181 – 10.71.34.18210.71.34.183
4710.71.34.184/3010.71.34.185 – 10.71.34.18610.71.34.187
4810.71.34.188/3010.71.34.189 – 10.71.34.19010.71.34.191
4910.71.34.192/3010.71.34.193 – 10.71.34.19410.71.34.195
5010.71.34.196/3010.71.34.197 – 10.71.34.19810.71.34.199
5110.71.34.200/3010.71.34.201 – 10.71.34.20210.71.34.203
5210.71.34.204/3010.71.34.205 – 10.71.34.20610.71.34.207
5310.71.34.208/3010.71.34.209 – 10.71.34.21010.71.34.211
5410.71.34.212/3010.71.34.213 – 10.71.34.21410.71.34.215
5510.71.34.216/3010.71.34.217 – 10.71.34.21810.71.34.219
5610.71.34.220/3010.71.34.221 – 10.71.34.22210.71.34.223
5710.71.34.224/3010.71.34.225 – 10.71.34.22610.71.34.227
5810.71.34.228/3010.71.34.229 – 10.71.34.23010.71.34.231
5910.71.34.232/3010.71.34.233 – 10.71.34.23410.71.34.235
6010.71.34.236/3010.71.34.237 – 10.71.34.23810.71.34.239
6110.71.34.240/3010.71.34.241 – 10.71.34.24210.71.34.243
6210.71.34.244/3010.71.34.245 – 10.71.34.24610.71.34.247
6310.71.34.248/3010.71.34.249 – 10.71.34.25010.71.34.251
6410.71.34.252/3010.71.34.253 – 10.71.34.25410.71.34.255
6510.71.35.0/3010.71.35.1 – 10.71.35.210.71.35.3
6610.71.35.4/3010.71.35.5 – 10.71.35.610.71.35.7
6710.71.35.8/3010.71.35.9 – 10.71.35.1010.71.35.11
6810.71.35.12/3010.71.35.13 – 10.71.35.1410.71.35.15
6910.71.35.16/3010.71.35.17 – 10.71.35.1810.71.35.19
7010.71.35.20/3010.71.35.21 – 10.71.35.2210.71.35.23
7110.71.35.24/3010.71.35.25 – 10.71.35.2610.71.35.27
7210.71.35.28/3010.71.35.29 – 10.71.35.3010.71.35.31
7310.71.35.32/3010.71.35.33 – 10.71.35.3410.71.35.35
7410.71.35.36/3010.71.35.37 – 10.71.35.3810.71.35.39
7510.71.35.40/3010.71.35.41 – 10.71.35.4210.71.35.43
7610.71.35.44/3010.71.35.45 – 10.71.35.4610.71.35.47
7710.71.35.48/3010.71.35.49 – 10.71.35.5010.71.35.51
7810.71.35.52/3010.71.35.53 – 10.71.35.5410.71.35.55
7910.71.35.56/3010.71.35.57 – 10.71.35.5810.71.35.59
8010.71.35.60/3010.71.35.61 – 10.71.35.6210.71.35.63
8110.71.35.64/3010.71.35.65 – 10.71.35.6610.71.35.67
8210.71.35.68/3010.71.35.69 – 10.71.35.7010.71.35.71
8310.71.35.72/3010.71.35.73 – 10.71.35.7410.71.35.75
8410.71.35.76/3010.71.35.77 – 10.71.35.7810.71.35.79
8510.71.35.80/3010.71.35.81 – 10.71.35.8210.71.35.83
8610.71.35.84/3010.71.35.85 – 10.71.35.8610.71.35.87
8710.71.35.88/3010.71.35.89 – 10.71.35.9010.71.35.91
8810.71.35.92/3010.71.35.93 – 10.71.35.9410.71.35.95
8910.71.35.96/3010.71.35.97 – 10.71.35.9810.71.35.99
9010.71.35.100/3010.71.35.101 – 10.71.35.10210.71.35.103
9110.71.35.104/3010.71.35.105 – 10.71.35.10610.71.35.107
9210.71.35.108/3010.71.35.109 – 10.71.35.11010.71.35.111
9310.71.35.112/3010.71.35.113 – 10.71.35.11410.71.35.115
9410.71.35.116/3010.71.35.117 – 10.71.35.11810.71.35.119
9510.71.35.120/3010.71.35.121 – 10.71.35.12210.71.35.123
9610.71.35.124/3010.71.35.125 – 10.71.35.12610.71.35.127
9710.71.35.128/3010.71.35.129 – 10.71.35.13010.71.35.131
9810.71.35.132/3010.71.35.133 – 10.71.35.13410.71.35.135
9910.71.35.136/3010.71.35.137 – 10.71.35.13810.71.35.139
10010.71.35.140/3010.71.35.141 – 10.71.35.14210.71.35.143
10110.71.35.144/3010.71.35.145 – 10.71.35.14610.71.35.147
10210.71.35.148/3010.71.35.149 – 10.71.35.15010.71.35.151
10310.71.35.152/3010.71.35.153 – 10.71.35.15410.71.35.155
10410.71.35.156/3010.71.35.157 – 10.71.35.15810.71.35.159
10510.71.35.160/3010.71.35.161 – 10.71.35.16210.71.35.163
10610.71.35.164/3010.71.35.165 – 10.71.35.16610.71.35.167
10710.71.35.168/3010.71.35.169 – 10.71.35.17010.71.35.171
10810.71.35.172/3010.71.35.173 – 10.71.35.17410.71.35.175
10910.71.35.176/3010.71.35.177 – 10.71.35.17810.71.35.179
11010.71.35.180/3010.71.35.181 – 10.71.35.18210.71.35.183
11110.71.35.184/3010.71.35.185 – 10.71.35.18610.71.35.187
11210.71.35.188/3010.71.35.189 – 10.71.35.19010.71.35.191
11310.71.35.192/3010.71.35.193 – 10.71.35.19410.71.35.195
11410.71.35.196/3010.71.35.197 – 10.71.35.19810.71.35.199
11510.71.35.200/3010.71.35.201 – 10.71.35.20210.71.35.203
11610.71.35.204/3010.71.35.205 – 10.71.35.20610.71.35.207
11710.71.35.208/3010.71.35.209 – 10.71.35.21010.71.35.211
11810.71.35.212/3010.71.35.213 – 10.71.35.21410.71.35.215
11910.71.35.216/3010.71.35.217 – 10.71.35.21810.71.35.219
12010.71.35.220/3010.71.35.221 – 10.71.35.22210.71.35.223
12110.71.35.224/3010.71.35.225 – 10.71.35.22610.71.35.227
12210.71.35.228/3010.71.35.229 – 10.71.35.23010.71.35.231
12310.71.35.232/3010.71.35.233 – 10.71.35.23410.71.35.235
12410.71.35.236/3010.71.35.237 – 10.71.35.23810.71.35.239
12510.71.35.240/3010.71.35.241 – 10.71.35.24210.71.35.243
12610.71.35.244/3010.71.35.245 – 10.71.35.24610.71.35.247
12710.71.35.248/3010.71.35.249 – 10.71.35.25010.71.35.251
12810.71.35.252/3010.71.35.253 – 10.71.35.25410.71.35.255
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 →