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)10.2.59.128/25
network10.2.59.128/25
broadcast10.2.59.255
first host10.2.59.129
last host10.2.59.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.59.128/25
address00001010.00000010.00111011.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00111011.10000000
broadcast00001010.00000010.00111011.11111111
green = network part, grey = host part
hex0x0a023b80
decimal167918464
reverse dns128.59.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3b80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.59.128/3210.2.59.128 – 10.2.59.12810.2.59.128
210.2.59.129/3210.2.59.129 – 10.2.59.12910.2.59.129
310.2.59.130/3210.2.59.130 – 10.2.59.13010.2.59.130
410.2.59.131/3210.2.59.131 – 10.2.59.13110.2.59.131
510.2.59.132/3210.2.59.132 – 10.2.59.13210.2.59.132
610.2.59.133/3210.2.59.133 – 10.2.59.13310.2.59.133
710.2.59.134/3210.2.59.134 – 10.2.59.13410.2.59.134
810.2.59.135/3210.2.59.135 – 10.2.59.13510.2.59.135
910.2.59.136/3210.2.59.136 – 10.2.59.13610.2.59.136
1010.2.59.137/3210.2.59.137 – 10.2.59.13710.2.59.137
1110.2.59.138/3210.2.59.138 – 10.2.59.13810.2.59.138
1210.2.59.139/3210.2.59.139 – 10.2.59.13910.2.59.139
1310.2.59.140/3210.2.59.140 – 10.2.59.14010.2.59.140
1410.2.59.141/3210.2.59.141 – 10.2.59.14110.2.59.141
1510.2.59.142/3210.2.59.142 – 10.2.59.14210.2.59.142
1610.2.59.143/3210.2.59.143 – 10.2.59.14310.2.59.143
1710.2.59.144/3210.2.59.144 – 10.2.59.14410.2.59.144
1810.2.59.145/3210.2.59.145 – 10.2.59.14510.2.59.145
1910.2.59.146/3210.2.59.146 – 10.2.59.14610.2.59.146
2010.2.59.147/3210.2.59.147 – 10.2.59.14710.2.59.147
2110.2.59.148/3210.2.59.148 – 10.2.59.14810.2.59.148
2210.2.59.149/3210.2.59.149 – 10.2.59.14910.2.59.149
2310.2.59.150/3210.2.59.150 – 10.2.59.15010.2.59.150
2410.2.59.151/3210.2.59.151 – 10.2.59.15110.2.59.151
2510.2.59.152/3210.2.59.152 – 10.2.59.15210.2.59.152
2610.2.59.153/3210.2.59.153 – 10.2.59.15310.2.59.153
2710.2.59.154/3210.2.59.154 – 10.2.59.15410.2.59.154
2810.2.59.155/3210.2.59.155 – 10.2.59.15510.2.59.155
2910.2.59.156/3210.2.59.156 – 10.2.59.15610.2.59.156
3010.2.59.157/3210.2.59.157 – 10.2.59.15710.2.59.157
3110.2.59.158/3210.2.59.158 – 10.2.59.15810.2.59.158
3210.2.59.159/3210.2.59.159 – 10.2.59.15910.2.59.159
3310.2.59.160/3210.2.59.160 – 10.2.59.16010.2.59.160
3410.2.59.161/3210.2.59.161 – 10.2.59.16110.2.59.161
3510.2.59.162/3210.2.59.162 – 10.2.59.16210.2.59.162
3610.2.59.163/3210.2.59.163 – 10.2.59.16310.2.59.163
3710.2.59.164/3210.2.59.164 – 10.2.59.16410.2.59.164
3810.2.59.165/3210.2.59.165 – 10.2.59.16510.2.59.165
3910.2.59.166/3210.2.59.166 – 10.2.59.16610.2.59.166
4010.2.59.167/3210.2.59.167 – 10.2.59.16710.2.59.167
4110.2.59.168/3210.2.59.168 – 10.2.59.16810.2.59.168
4210.2.59.169/3210.2.59.169 – 10.2.59.16910.2.59.169
4310.2.59.170/3210.2.59.170 – 10.2.59.17010.2.59.170
4410.2.59.171/3210.2.59.171 – 10.2.59.17110.2.59.171
4510.2.59.172/3210.2.59.172 – 10.2.59.17210.2.59.172
4610.2.59.173/3210.2.59.173 – 10.2.59.17310.2.59.173
4710.2.59.174/3210.2.59.174 – 10.2.59.17410.2.59.174
4810.2.59.175/3210.2.59.175 – 10.2.59.17510.2.59.175
4910.2.59.176/3210.2.59.176 – 10.2.59.17610.2.59.176
5010.2.59.177/3210.2.59.177 – 10.2.59.17710.2.59.177
5110.2.59.178/3210.2.59.178 – 10.2.59.17810.2.59.178
5210.2.59.179/3210.2.59.179 – 10.2.59.17910.2.59.179
5310.2.59.180/3210.2.59.180 – 10.2.59.18010.2.59.180
5410.2.59.181/3210.2.59.181 – 10.2.59.18110.2.59.181
5510.2.59.182/3210.2.59.182 – 10.2.59.18210.2.59.182
5610.2.59.183/3210.2.59.183 – 10.2.59.18310.2.59.183
5710.2.59.184/3210.2.59.184 – 10.2.59.18410.2.59.184
5810.2.59.185/3210.2.59.185 – 10.2.59.18510.2.59.185
5910.2.59.186/3210.2.59.186 – 10.2.59.18610.2.59.186
6010.2.59.187/3210.2.59.187 – 10.2.59.18710.2.59.187
6110.2.59.188/3210.2.59.188 – 10.2.59.18810.2.59.188
6210.2.59.189/3210.2.59.189 – 10.2.59.18910.2.59.189
6310.2.59.190/3210.2.59.190 – 10.2.59.19010.2.59.190
6410.2.59.191/3210.2.59.191 – 10.2.59.19110.2.59.191
6510.2.59.192/3210.2.59.192 – 10.2.59.19210.2.59.192
6610.2.59.193/3210.2.59.193 – 10.2.59.19310.2.59.193
6710.2.59.194/3210.2.59.194 – 10.2.59.19410.2.59.194
6810.2.59.195/3210.2.59.195 – 10.2.59.19510.2.59.195
6910.2.59.196/3210.2.59.196 – 10.2.59.19610.2.59.196
7010.2.59.197/3210.2.59.197 – 10.2.59.19710.2.59.197
7110.2.59.198/3210.2.59.198 – 10.2.59.19810.2.59.198
7210.2.59.199/3210.2.59.199 – 10.2.59.19910.2.59.199
7310.2.59.200/3210.2.59.200 – 10.2.59.20010.2.59.200
7410.2.59.201/3210.2.59.201 – 10.2.59.20110.2.59.201
7510.2.59.202/3210.2.59.202 – 10.2.59.20210.2.59.202
7610.2.59.203/3210.2.59.203 – 10.2.59.20310.2.59.203
7710.2.59.204/3210.2.59.204 – 10.2.59.20410.2.59.204
7810.2.59.205/3210.2.59.205 – 10.2.59.20510.2.59.205
7910.2.59.206/3210.2.59.206 – 10.2.59.20610.2.59.206
8010.2.59.207/3210.2.59.207 – 10.2.59.20710.2.59.207
8110.2.59.208/3210.2.59.208 – 10.2.59.20810.2.59.208
8210.2.59.209/3210.2.59.209 – 10.2.59.20910.2.59.209
8310.2.59.210/3210.2.59.210 – 10.2.59.21010.2.59.210
8410.2.59.211/3210.2.59.211 – 10.2.59.21110.2.59.211
8510.2.59.212/3210.2.59.212 – 10.2.59.21210.2.59.212
8610.2.59.213/3210.2.59.213 – 10.2.59.21310.2.59.213
8710.2.59.214/3210.2.59.214 – 10.2.59.21410.2.59.214
8810.2.59.215/3210.2.59.215 – 10.2.59.21510.2.59.215
8910.2.59.216/3210.2.59.216 – 10.2.59.21610.2.59.216
9010.2.59.217/3210.2.59.217 – 10.2.59.21710.2.59.217
9110.2.59.218/3210.2.59.218 – 10.2.59.21810.2.59.218
9210.2.59.219/3210.2.59.219 – 10.2.59.21910.2.59.219
9310.2.59.220/3210.2.59.220 – 10.2.59.22010.2.59.220
9410.2.59.221/3210.2.59.221 – 10.2.59.22110.2.59.221
9510.2.59.222/3210.2.59.222 – 10.2.59.22210.2.59.222
9610.2.59.223/3210.2.59.223 – 10.2.59.22310.2.59.223
9710.2.59.224/3210.2.59.224 – 10.2.59.22410.2.59.224
9810.2.59.225/3210.2.59.225 – 10.2.59.22510.2.59.225
9910.2.59.226/3210.2.59.226 – 10.2.59.22610.2.59.226
10010.2.59.227/3210.2.59.227 – 10.2.59.22710.2.59.227
10110.2.59.228/3210.2.59.228 – 10.2.59.22810.2.59.228
10210.2.59.229/3210.2.59.229 – 10.2.59.22910.2.59.229
10310.2.59.230/3210.2.59.230 – 10.2.59.23010.2.59.230
10410.2.59.231/3210.2.59.231 – 10.2.59.23110.2.59.231
10510.2.59.232/3210.2.59.232 – 10.2.59.23210.2.59.232
10610.2.59.233/3210.2.59.233 – 10.2.59.23310.2.59.233
10710.2.59.234/3210.2.59.234 – 10.2.59.23410.2.59.234
10810.2.59.235/3210.2.59.235 – 10.2.59.23510.2.59.235
10910.2.59.236/3210.2.59.236 – 10.2.59.23610.2.59.236
11010.2.59.237/3210.2.59.237 – 10.2.59.23710.2.59.237
11110.2.59.238/3210.2.59.238 – 10.2.59.23810.2.59.238
11210.2.59.239/3210.2.59.239 – 10.2.59.23910.2.59.239
11310.2.59.240/3210.2.59.240 – 10.2.59.24010.2.59.240
11410.2.59.241/3210.2.59.241 – 10.2.59.24110.2.59.241
11510.2.59.242/3210.2.59.242 – 10.2.59.24210.2.59.242
11610.2.59.243/3210.2.59.243 – 10.2.59.24310.2.59.243
11710.2.59.244/3210.2.59.244 – 10.2.59.24410.2.59.244
11810.2.59.245/3210.2.59.245 – 10.2.59.24510.2.59.245
11910.2.59.246/3210.2.59.246 – 10.2.59.24610.2.59.246
12010.2.59.247/3210.2.59.247 – 10.2.59.24710.2.59.247
12110.2.59.248/3210.2.59.248 – 10.2.59.24810.2.59.248
12210.2.59.249/3210.2.59.249 – 10.2.59.24910.2.59.249
12310.2.59.250/3210.2.59.250 – 10.2.59.25010.2.59.250
12410.2.59.251/3210.2.59.251 – 10.2.59.25110.2.59.251
12510.2.59.252/3210.2.59.252 – 10.2.59.25210.2.59.252
12610.2.59.253/3210.2.59.253 – 10.2.59.25310.2.59.253
12710.2.59.254/3210.2.59.254 – 10.2.59.25410.2.59.254
12810.2.59.255/3210.2.59.255 – 10.2.59.25510.2.59.255
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 →