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)10.3.26.128/25
network10.3.26.128/25
broadcast10.3.26.255
first host10.3.26.129
last host10.3.26.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.26.128/25
address00001010.00000011.00011010.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.00011010.10000000
broadcast00001010.00000011.00011010.11111111
green = network part, grey = host part
hex0x0a031a80
decimal167975552
reverse dns128.26.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:1a80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.26.128/3210.3.26.128 – 10.3.26.12810.3.26.128
210.3.26.129/3210.3.26.129 – 10.3.26.12910.3.26.129
310.3.26.130/3210.3.26.130 – 10.3.26.13010.3.26.130
410.3.26.131/3210.3.26.131 – 10.3.26.13110.3.26.131
510.3.26.132/3210.3.26.132 – 10.3.26.13210.3.26.132
610.3.26.133/3210.3.26.133 – 10.3.26.13310.3.26.133
710.3.26.134/3210.3.26.134 – 10.3.26.13410.3.26.134
810.3.26.135/3210.3.26.135 – 10.3.26.13510.3.26.135
910.3.26.136/3210.3.26.136 – 10.3.26.13610.3.26.136
1010.3.26.137/3210.3.26.137 – 10.3.26.13710.3.26.137
1110.3.26.138/3210.3.26.138 – 10.3.26.13810.3.26.138
1210.3.26.139/3210.3.26.139 – 10.3.26.13910.3.26.139
1310.3.26.140/3210.3.26.140 – 10.3.26.14010.3.26.140
1410.3.26.141/3210.3.26.141 – 10.3.26.14110.3.26.141
1510.3.26.142/3210.3.26.142 – 10.3.26.14210.3.26.142
1610.3.26.143/3210.3.26.143 – 10.3.26.14310.3.26.143
1710.3.26.144/3210.3.26.144 – 10.3.26.14410.3.26.144
1810.3.26.145/3210.3.26.145 – 10.3.26.14510.3.26.145
1910.3.26.146/3210.3.26.146 – 10.3.26.14610.3.26.146
2010.3.26.147/3210.3.26.147 – 10.3.26.14710.3.26.147
2110.3.26.148/3210.3.26.148 – 10.3.26.14810.3.26.148
2210.3.26.149/3210.3.26.149 – 10.3.26.14910.3.26.149
2310.3.26.150/3210.3.26.150 – 10.3.26.15010.3.26.150
2410.3.26.151/3210.3.26.151 – 10.3.26.15110.3.26.151
2510.3.26.152/3210.3.26.152 – 10.3.26.15210.3.26.152
2610.3.26.153/3210.3.26.153 – 10.3.26.15310.3.26.153
2710.3.26.154/3210.3.26.154 – 10.3.26.15410.3.26.154
2810.3.26.155/3210.3.26.155 – 10.3.26.15510.3.26.155
2910.3.26.156/3210.3.26.156 – 10.3.26.15610.3.26.156
3010.3.26.157/3210.3.26.157 – 10.3.26.15710.3.26.157
3110.3.26.158/3210.3.26.158 – 10.3.26.15810.3.26.158
3210.3.26.159/3210.3.26.159 – 10.3.26.15910.3.26.159
3310.3.26.160/3210.3.26.160 – 10.3.26.16010.3.26.160
3410.3.26.161/3210.3.26.161 – 10.3.26.16110.3.26.161
3510.3.26.162/3210.3.26.162 – 10.3.26.16210.3.26.162
3610.3.26.163/3210.3.26.163 – 10.3.26.16310.3.26.163
3710.3.26.164/3210.3.26.164 – 10.3.26.16410.3.26.164
3810.3.26.165/3210.3.26.165 – 10.3.26.16510.3.26.165
3910.3.26.166/3210.3.26.166 – 10.3.26.16610.3.26.166
4010.3.26.167/3210.3.26.167 – 10.3.26.16710.3.26.167
4110.3.26.168/3210.3.26.168 – 10.3.26.16810.3.26.168
4210.3.26.169/3210.3.26.169 – 10.3.26.16910.3.26.169
4310.3.26.170/3210.3.26.170 – 10.3.26.17010.3.26.170
4410.3.26.171/3210.3.26.171 – 10.3.26.17110.3.26.171
4510.3.26.172/3210.3.26.172 – 10.3.26.17210.3.26.172
4610.3.26.173/3210.3.26.173 – 10.3.26.17310.3.26.173
4710.3.26.174/3210.3.26.174 – 10.3.26.17410.3.26.174
4810.3.26.175/3210.3.26.175 – 10.3.26.17510.3.26.175
4910.3.26.176/3210.3.26.176 – 10.3.26.17610.3.26.176
5010.3.26.177/3210.3.26.177 – 10.3.26.17710.3.26.177
5110.3.26.178/3210.3.26.178 – 10.3.26.17810.3.26.178
5210.3.26.179/3210.3.26.179 – 10.3.26.17910.3.26.179
5310.3.26.180/3210.3.26.180 – 10.3.26.18010.3.26.180
5410.3.26.181/3210.3.26.181 – 10.3.26.18110.3.26.181
5510.3.26.182/3210.3.26.182 – 10.3.26.18210.3.26.182
5610.3.26.183/3210.3.26.183 – 10.3.26.18310.3.26.183
5710.3.26.184/3210.3.26.184 – 10.3.26.18410.3.26.184
5810.3.26.185/3210.3.26.185 – 10.3.26.18510.3.26.185
5910.3.26.186/3210.3.26.186 – 10.3.26.18610.3.26.186
6010.3.26.187/3210.3.26.187 – 10.3.26.18710.3.26.187
6110.3.26.188/3210.3.26.188 – 10.3.26.18810.3.26.188
6210.3.26.189/3210.3.26.189 – 10.3.26.18910.3.26.189
6310.3.26.190/3210.3.26.190 – 10.3.26.19010.3.26.190
6410.3.26.191/3210.3.26.191 – 10.3.26.19110.3.26.191
6510.3.26.192/3210.3.26.192 – 10.3.26.19210.3.26.192
6610.3.26.193/3210.3.26.193 – 10.3.26.19310.3.26.193
6710.3.26.194/3210.3.26.194 – 10.3.26.19410.3.26.194
6810.3.26.195/3210.3.26.195 – 10.3.26.19510.3.26.195
6910.3.26.196/3210.3.26.196 – 10.3.26.19610.3.26.196
7010.3.26.197/3210.3.26.197 – 10.3.26.19710.3.26.197
7110.3.26.198/3210.3.26.198 – 10.3.26.19810.3.26.198
7210.3.26.199/3210.3.26.199 – 10.3.26.19910.3.26.199
7310.3.26.200/3210.3.26.200 – 10.3.26.20010.3.26.200
7410.3.26.201/3210.3.26.201 – 10.3.26.20110.3.26.201
7510.3.26.202/3210.3.26.202 – 10.3.26.20210.3.26.202
7610.3.26.203/3210.3.26.203 – 10.3.26.20310.3.26.203
7710.3.26.204/3210.3.26.204 – 10.3.26.20410.3.26.204
7810.3.26.205/3210.3.26.205 – 10.3.26.20510.3.26.205
7910.3.26.206/3210.3.26.206 – 10.3.26.20610.3.26.206
8010.3.26.207/3210.3.26.207 – 10.3.26.20710.3.26.207
8110.3.26.208/3210.3.26.208 – 10.3.26.20810.3.26.208
8210.3.26.209/3210.3.26.209 – 10.3.26.20910.3.26.209
8310.3.26.210/3210.3.26.210 – 10.3.26.21010.3.26.210
8410.3.26.211/3210.3.26.211 – 10.3.26.21110.3.26.211
8510.3.26.212/3210.3.26.212 – 10.3.26.21210.3.26.212
8610.3.26.213/3210.3.26.213 – 10.3.26.21310.3.26.213
8710.3.26.214/3210.3.26.214 – 10.3.26.21410.3.26.214
8810.3.26.215/3210.3.26.215 – 10.3.26.21510.3.26.215
8910.3.26.216/3210.3.26.216 – 10.3.26.21610.3.26.216
9010.3.26.217/3210.3.26.217 – 10.3.26.21710.3.26.217
9110.3.26.218/3210.3.26.218 – 10.3.26.21810.3.26.218
9210.3.26.219/3210.3.26.219 – 10.3.26.21910.3.26.219
9310.3.26.220/3210.3.26.220 – 10.3.26.22010.3.26.220
9410.3.26.221/3210.3.26.221 – 10.3.26.22110.3.26.221
9510.3.26.222/3210.3.26.222 – 10.3.26.22210.3.26.222
9610.3.26.223/3210.3.26.223 – 10.3.26.22310.3.26.223
9710.3.26.224/3210.3.26.224 – 10.3.26.22410.3.26.224
9810.3.26.225/3210.3.26.225 – 10.3.26.22510.3.26.225
9910.3.26.226/3210.3.26.226 – 10.3.26.22610.3.26.226
10010.3.26.227/3210.3.26.227 – 10.3.26.22710.3.26.227
10110.3.26.228/3210.3.26.228 – 10.3.26.22810.3.26.228
10210.3.26.229/3210.3.26.229 – 10.3.26.22910.3.26.229
10310.3.26.230/3210.3.26.230 – 10.3.26.23010.3.26.230
10410.3.26.231/3210.3.26.231 – 10.3.26.23110.3.26.231
10510.3.26.232/3210.3.26.232 – 10.3.26.23210.3.26.232
10610.3.26.233/3210.3.26.233 – 10.3.26.23310.3.26.233
10710.3.26.234/3210.3.26.234 – 10.3.26.23410.3.26.234
10810.3.26.235/3210.3.26.235 – 10.3.26.23510.3.26.235
10910.3.26.236/3210.3.26.236 – 10.3.26.23610.3.26.236
11010.3.26.237/3210.3.26.237 – 10.3.26.23710.3.26.237
11110.3.26.238/3210.3.26.238 – 10.3.26.23810.3.26.238
11210.3.26.239/3210.3.26.239 – 10.3.26.23910.3.26.239
11310.3.26.240/3210.3.26.240 – 10.3.26.24010.3.26.240
11410.3.26.241/3210.3.26.241 – 10.3.26.24110.3.26.241
11510.3.26.242/3210.3.26.242 – 10.3.26.24210.3.26.242
11610.3.26.243/3210.3.26.243 – 10.3.26.24310.3.26.243
11710.3.26.244/3210.3.26.244 – 10.3.26.24410.3.26.244
11810.3.26.245/3210.3.26.245 – 10.3.26.24510.3.26.245
11910.3.26.246/3210.3.26.246 – 10.3.26.24610.3.26.246
12010.3.26.247/3210.3.26.247 – 10.3.26.24710.3.26.247
12110.3.26.248/3210.3.26.248 – 10.3.26.24810.3.26.248
12210.3.26.249/3210.3.26.249 – 10.3.26.24910.3.26.249
12310.3.26.250/3210.3.26.250 – 10.3.26.25010.3.26.250
12410.3.26.251/3210.3.26.251 – 10.3.26.25110.3.26.251
12510.3.26.252/3210.3.26.252 – 10.3.26.25210.3.26.252
12610.3.26.253/3210.3.26.253 – 10.3.26.25310.3.26.253
12710.3.26.254/3210.3.26.254 – 10.3.26.25410.3.26.254
12810.3.26.255/3210.3.26.255 – 10.3.26.25510.3.26.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /25
/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-
/23255.255.254.0512510-
/24255.255.255.0256254-
/25255.255.255.1281281261
/26255.255.255.19264622 split →
/27255.255.255.22432304 split →
/28255.255.255.24016148 split →
/29255.255.255.2488616 split →
/30255.255.255.2524232 split →
/31255.255.255.2542264 split →
/32255.255.255.25511128 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 →