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)10.37.26.0/23
network10.37.26.0/23
broadcast10.37.27.255
first host10.37.26.1
last host10.37.27.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.37.26.0/23
address00001010.00100101.00011010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00100101.00011010.00000000
broadcast00001010.00100101.00011011.11111111
green = network part, grey = host part
hex0x0a251a00
decimal170203648
reverse dns0.26.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:1a00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.37.26.0/3010.37.26.1 – 10.37.26.210.37.26.3
210.37.26.4/3010.37.26.5 – 10.37.26.610.37.26.7
310.37.26.8/3010.37.26.9 – 10.37.26.1010.37.26.11
410.37.26.12/3010.37.26.13 – 10.37.26.1410.37.26.15
510.37.26.16/3010.37.26.17 – 10.37.26.1810.37.26.19
610.37.26.20/3010.37.26.21 – 10.37.26.2210.37.26.23
710.37.26.24/3010.37.26.25 – 10.37.26.2610.37.26.27
810.37.26.28/3010.37.26.29 – 10.37.26.3010.37.26.31
910.37.26.32/3010.37.26.33 – 10.37.26.3410.37.26.35
1010.37.26.36/3010.37.26.37 – 10.37.26.3810.37.26.39
1110.37.26.40/3010.37.26.41 – 10.37.26.4210.37.26.43
1210.37.26.44/3010.37.26.45 – 10.37.26.4610.37.26.47
1310.37.26.48/3010.37.26.49 – 10.37.26.5010.37.26.51
1410.37.26.52/3010.37.26.53 – 10.37.26.5410.37.26.55
1510.37.26.56/3010.37.26.57 – 10.37.26.5810.37.26.59
1610.37.26.60/3010.37.26.61 – 10.37.26.6210.37.26.63
1710.37.26.64/3010.37.26.65 – 10.37.26.6610.37.26.67
1810.37.26.68/3010.37.26.69 – 10.37.26.7010.37.26.71
1910.37.26.72/3010.37.26.73 – 10.37.26.7410.37.26.75
2010.37.26.76/3010.37.26.77 – 10.37.26.7810.37.26.79
2110.37.26.80/3010.37.26.81 – 10.37.26.8210.37.26.83
2210.37.26.84/3010.37.26.85 – 10.37.26.8610.37.26.87
2310.37.26.88/3010.37.26.89 – 10.37.26.9010.37.26.91
2410.37.26.92/3010.37.26.93 – 10.37.26.9410.37.26.95
2510.37.26.96/3010.37.26.97 – 10.37.26.9810.37.26.99
2610.37.26.100/3010.37.26.101 – 10.37.26.10210.37.26.103
2710.37.26.104/3010.37.26.105 – 10.37.26.10610.37.26.107
2810.37.26.108/3010.37.26.109 – 10.37.26.11010.37.26.111
2910.37.26.112/3010.37.26.113 – 10.37.26.11410.37.26.115
3010.37.26.116/3010.37.26.117 – 10.37.26.11810.37.26.119
3110.37.26.120/3010.37.26.121 – 10.37.26.12210.37.26.123
3210.37.26.124/3010.37.26.125 – 10.37.26.12610.37.26.127
3310.37.26.128/3010.37.26.129 – 10.37.26.13010.37.26.131
3410.37.26.132/3010.37.26.133 – 10.37.26.13410.37.26.135
3510.37.26.136/3010.37.26.137 – 10.37.26.13810.37.26.139
3610.37.26.140/3010.37.26.141 – 10.37.26.14210.37.26.143
3710.37.26.144/3010.37.26.145 – 10.37.26.14610.37.26.147
3810.37.26.148/3010.37.26.149 – 10.37.26.15010.37.26.151
3910.37.26.152/3010.37.26.153 – 10.37.26.15410.37.26.155
4010.37.26.156/3010.37.26.157 – 10.37.26.15810.37.26.159
4110.37.26.160/3010.37.26.161 – 10.37.26.16210.37.26.163
4210.37.26.164/3010.37.26.165 – 10.37.26.16610.37.26.167
4310.37.26.168/3010.37.26.169 – 10.37.26.17010.37.26.171
4410.37.26.172/3010.37.26.173 – 10.37.26.17410.37.26.175
4510.37.26.176/3010.37.26.177 – 10.37.26.17810.37.26.179
4610.37.26.180/3010.37.26.181 – 10.37.26.18210.37.26.183
4710.37.26.184/3010.37.26.185 – 10.37.26.18610.37.26.187
4810.37.26.188/3010.37.26.189 – 10.37.26.19010.37.26.191
4910.37.26.192/3010.37.26.193 – 10.37.26.19410.37.26.195
5010.37.26.196/3010.37.26.197 – 10.37.26.19810.37.26.199
5110.37.26.200/3010.37.26.201 – 10.37.26.20210.37.26.203
5210.37.26.204/3010.37.26.205 – 10.37.26.20610.37.26.207
5310.37.26.208/3010.37.26.209 – 10.37.26.21010.37.26.211
5410.37.26.212/3010.37.26.213 – 10.37.26.21410.37.26.215
5510.37.26.216/3010.37.26.217 – 10.37.26.21810.37.26.219
5610.37.26.220/3010.37.26.221 – 10.37.26.22210.37.26.223
5710.37.26.224/3010.37.26.225 – 10.37.26.22610.37.26.227
5810.37.26.228/3010.37.26.229 – 10.37.26.23010.37.26.231
5910.37.26.232/3010.37.26.233 – 10.37.26.23410.37.26.235
6010.37.26.236/3010.37.26.237 – 10.37.26.23810.37.26.239
6110.37.26.240/3010.37.26.241 – 10.37.26.24210.37.26.243
6210.37.26.244/3010.37.26.245 – 10.37.26.24610.37.26.247
6310.37.26.248/3010.37.26.249 – 10.37.26.25010.37.26.251
6410.37.26.252/3010.37.26.253 – 10.37.26.25410.37.26.255
6510.37.27.0/3010.37.27.1 – 10.37.27.210.37.27.3
6610.37.27.4/3010.37.27.5 – 10.37.27.610.37.27.7
6710.37.27.8/3010.37.27.9 – 10.37.27.1010.37.27.11
6810.37.27.12/3010.37.27.13 – 10.37.27.1410.37.27.15
6910.37.27.16/3010.37.27.17 – 10.37.27.1810.37.27.19
7010.37.27.20/3010.37.27.21 – 10.37.27.2210.37.27.23
7110.37.27.24/3010.37.27.25 – 10.37.27.2610.37.27.27
7210.37.27.28/3010.37.27.29 – 10.37.27.3010.37.27.31
7310.37.27.32/3010.37.27.33 – 10.37.27.3410.37.27.35
7410.37.27.36/3010.37.27.37 – 10.37.27.3810.37.27.39
7510.37.27.40/3010.37.27.41 – 10.37.27.4210.37.27.43
7610.37.27.44/3010.37.27.45 – 10.37.27.4610.37.27.47
7710.37.27.48/3010.37.27.49 – 10.37.27.5010.37.27.51
7810.37.27.52/3010.37.27.53 – 10.37.27.5410.37.27.55
7910.37.27.56/3010.37.27.57 – 10.37.27.5810.37.27.59
8010.37.27.60/3010.37.27.61 – 10.37.27.6210.37.27.63
8110.37.27.64/3010.37.27.65 – 10.37.27.6610.37.27.67
8210.37.27.68/3010.37.27.69 – 10.37.27.7010.37.27.71
8310.37.27.72/3010.37.27.73 – 10.37.27.7410.37.27.75
8410.37.27.76/3010.37.27.77 – 10.37.27.7810.37.27.79
8510.37.27.80/3010.37.27.81 – 10.37.27.8210.37.27.83
8610.37.27.84/3010.37.27.85 – 10.37.27.8610.37.27.87
8710.37.27.88/3010.37.27.89 – 10.37.27.9010.37.27.91
8810.37.27.92/3010.37.27.93 – 10.37.27.9410.37.27.95
8910.37.27.96/3010.37.27.97 – 10.37.27.9810.37.27.99
9010.37.27.100/3010.37.27.101 – 10.37.27.10210.37.27.103
9110.37.27.104/3010.37.27.105 – 10.37.27.10610.37.27.107
9210.37.27.108/3010.37.27.109 – 10.37.27.11010.37.27.111
9310.37.27.112/3010.37.27.113 – 10.37.27.11410.37.27.115
9410.37.27.116/3010.37.27.117 – 10.37.27.11810.37.27.119
9510.37.27.120/3010.37.27.121 – 10.37.27.12210.37.27.123
9610.37.27.124/3010.37.27.125 – 10.37.27.12610.37.27.127
9710.37.27.128/3010.37.27.129 – 10.37.27.13010.37.27.131
9810.37.27.132/3010.37.27.133 – 10.37.27.13410.37.27.135
9910.37.27.136/3010.37.27.137 – 10.37.27.13810.37.27.139
10010.37.27.140/3010.37.27.141 – 10.37.27.14210.37.27.143
10110.37.27.144/3010.37.27.145 – 10.37.27.14610.37.27.147
10210.37.27.148/3010.37.27.149 – 10.37.27.15010.37.27.151
10310.37.27.152/3010.37.27.153 – 10.37.27.15410.37.27.155
10410.37.27.156/3010.37.27.157 – 10.37.27.15810.37.27.159
10510.37.27.160/3010.37.27.161 – 10.37.27.16210.37.27.163
10610.37.27.164/3010.37.27.165 – 10.37.27.16610.37.27.167
10710.37.27.168/3010.37.27.169 – 10.37.27.17010.37.27.171
10810.37.27.172/3010.37.27.173 – 10.37.27.17410.37.27.175
10910.37.27.176/3010.37.27.177 – 10.37.27.17810.37.27.179
11010.37.27.180/3010.37.27.181 – 10.37.27.18210.37.27.183
11110.37.27.184/3010.37.27.185 – 10.37.27.18610.37.27.187
11210.37.27.188/3010.37.27.189 – 10.37.27.19010.37.27.191
11310.37.27.192/3010.37.27.193 – 10.37.27.19410.37.27.195
11410.37.27.196/3010.37.27.197 – 10.37.27.19810.37.27.199
11510.37.27.200/3010.37.27.201 – 10.37.27.20210.37.27.203
11610.37.27.204/3010.37.27.205 – 10.37.27.20610.37.27.207
11710.37.27.208/3010.37.27.209 – 10.37.27.21010.37.27.211
11810.37.27.212/3010.37.27.213 – 10.37.27.21410.37.27.215
11910.37.27.216/3010.37.27.217 – 10.37.27.21810.37.27.219
12010.37.27.220/3010.37.27.221 – 10.37.27.22210.37.27.223
12110.37.27.224/3010.37.27.225 – 10.37.27.22610.37.27.227
12210.37.27.228/3010.37.27.229 – 10.37.27.23010.37.27.231
12310.37.27.232/3010.37.27.233 – 10.37.27.23410.37.27.235
12410.37.27.236/3010.37.27.237 – 10.37.27.23810.37.27.239
12510.37.27.240/3010.37.27.241 – 10.37.27.24210.37.27.243
12610.37.27.244/3010.37.27.245 – 10.37.27.24610.37.27.247
12710.37.27.248/3010.37.27.249 – 10.37.27.25010.37.27.251
12810.37.27.252/3010.37.27.253 – 10.37.27.25410.37.27.255
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 →