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)10.2.252.128/25
network10.2.252.128/25
broadcast10.2.252.255
first host10.2.252.129
last host10.2.252.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.252.128/25
address00001010.00000010.11111100.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.11111100.10000000
broadcast00001010.00000010.11111100.11111111
green = network part, grey = host part
hex0x0a02fc80
decimal167967872
reverse dns128.252.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:fc80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.252.128/3210.2.252.128 – 10.2.252.12810.2.252.128
210.2.252.129/3210.2.252.129 – 10.2.252.12910.2.252.129
310.2.252.130/3210.2.252.130 – 10.2.252.13010.2.252.130
410.2.252.131/3210.2.252.131 – 10.2.252.13110.2.252.131
510.2.252.132/3210.2.252.132 – 10.2.252.13210.2.252.132
610.2.252.133/3210.2.252.133 – 10.2.252.13310.2.252.133
710.2.252.134/3210.2.252.134 – 10.2.252.13410.2.252.134
810.2.252.135/3210.2.252.135 – 10.2.252.13510.2.252.135
910.2.252.136/3210.2.252.136 – 10.2.252.13610.2.252.136
1010.2.252.137/3210.2.252.137 – 10.2.252.13710.2.252.137
1110.2.252.138/3210.2.252.138 – 10.2.252.13810.2.252.138
1210.2.252.139/3210.2.252.139 – 10.2.252.13910.2.252.139
1310.2.252.140/3210.2.252.140 – 10.2.252.14010.2.252.140
1410.2.252.141/3210.2.252.141 – 10.2.252.14110.2.252.141
1510.2.252.142/3210.2.252.142 – 10.2.252.14210.2.252.142
1610.2.252.143/3210.2.252.143 – 10.2.252.14310.2.252.143
1710.2.252.144/3210.2.252.144 – 10.2.252.14410.2.252.144
1810.2.252.145/3210.2.252.145 – 10.2.252.14510.2.252.145
1910.2.252.146/3210.2.252.146 – 10.2.252.14610.2.252.146
2010.2.252.147/3210.2.252.147 – 10.2.252.14710.2.252.147
2110.2.252.148/3210.2.252.148 – 10.2.252.14810.2.252.148
2210.2.252.149/3210.2.252.149 – 10.2.252.14910.2.252.149
2310.2.252.150/3210.2.252.150 – 10.2.252.15010.2.252.150
2410.2.252.151/3210.2.252.151 – 10.2.252.15110.2.252.151
2510.2.252.152/3210.2.252.152 – 10.2.252.15210.2.252.152
2610.2.252.153/3210.2.252.153 – 10.2.252.15310.2.252.153
2710.2.252.154/3210.2.252.154 – 10.2.252.15410.2.252.154
2810.2.252.155/3210.2.252.155 – 10.2.252.15510.2.252.155
2910.2.252.156/3210.2.252.156 – 10.2.252.15610.2.252.156
3010.2.252.157/3210.2.252.157 – 10.2.252.15710.2.252.157
3110.2.252.158/3210.2.252.158 – 10.2.252.15810.2.252.158
3210.2.252.159/3210.2.252.159 – 10.2.252.15910.2.252.159
3310.2.252.160/3210.2.252.160 – 10.2.252.16010.2.252.160
3410.2.252.161/3210.2.252.161 – 10.2.252.16110.2.252.161
3510.2.252.162/3210.2.252.162 – 10.2.252.16210.2.252.162
3610.2.252.163/3210.2.252.163 – 10.2.252.16310.2.252.163
3710.2.252.164/3210.2.252.164 – 10.2.252.16410.2.252.164
3810.2.252.165/3210.2.252.165 – 10.2.252.16510.2.252.165
3910.2.252.166/3210.2.252.166 – 10.2.252.16610.2.252.166
4010.2.252.167/3210.2.252.167 – 10.2.252.16710.2.252.167
4110.2.252.168/3210.2.252.168 – 10.2.252.16810.2.252.168
4210.2.252.169/3210.2.252.169 – 10.2.252.16910.2.252.169
4310.2.252.170/3210.2.252.170 – 10.2.252.17010.2.252.170
4410.2.252.171/3210.2.252.171 – 10.2.252.17110.2.252.171
4510.2.252.172/3210.2.252.172 – 10.2.252.17210.2.252.172
4610.2.252.173/3210.2.252.173 – 10.2.252.17310.2.252.173
4710.2.252.174/3210.2.252.174 – 10.2.252.17410.2.252.174
4810.2.252.175/3210.2.252.175 – 10.2.252.17510.2.252.175
4910.2.252.176/3210.2.252.176 – 10.2.252.17610.2.252.176
5010.2.252.177/3210.2.252.177 – 10.2.252.17710.2.252.177
5110.2.252.178/3210.2.252.178 – 10.2.252.17810.2.252.178
5210.2.252.179/3210.2.252.179 – 10.2.252.17910.2.252.179
5310.2.252.180/3210.2.252.180 – 10.2.252.18010.2.252.180
5410.2.252.181/3210.2.252.181 – 10.2.252.18110.2.252.181
5510.2.252.182/3210.2.252.182 – 10.2.252.18210.2.252.182
5610.2.252.183/3210.2.252.183 – 10.2.252.18310.2.252.183
5710.2.252.184/3210.2.252.184 – 10.2.252.18410.2.252.184
5810.2.252.185/3210.2.252.185 – 10.2.252.18510.2.252.185
5910.2.252.186/3210.2.252.186 – 10.2.252.18610.2.252.186
6010.2.252.187/3210.2.252.187 – 10.2.252.18710.2.252.187
6110.2.252.188/3210.2.252.188 – 10.2.252.18810.2.252.188
6210.2.252.189/3210.2.252.189 – 10.2.252.18910.2.252.189
6310.2.252.190/3210.2.252.190 – 10.2.252.19010.2.252.190
6410.2.252.191/3210.2.252.191 – 10.2.252.19110.2.252.191
6510.2.252.192/3210.2.252.192 – 10.2.252.19210.2.252.192
6610.2.252.193/3210.2.252.193 – 10.2.252.19310.2.252.193
6710.2.252.194/3210.2.252.194 – 10.2.252.19410.2.252.194
6810.2.252.195/3210.2.252.195 – 10.2.252.19510.2.252.195
6910.2.252.196/3210.2.252.196 – 10.2.252.19610.2.252.196
7010.2.252.197/3210.2.252.197 – 10.2.252.19710.2.252.197
7110.2.252.198/3210.2.252.198 – 10.2.252.19810.2.252.198
7210.2.252.199/3210.2.252.199 – 10.2.252.19910.2.252.199
7310.2.252.200/3210.2.252.200 – 10.2.252.20010.2.252.200
7410.2.252.201/3210.2.252.201 – 10.2.252.20110.2.252.201
7510.2.252.202/3210.2.252.202 – 10.2.252.20210.2.252.202
7610.2.252.203/3210.2.252.203 – 10.2.252.20310.2.252.203
7710.2.252.204/3210.2.252.204 – 10.2.252.20410.2.252.204
7810.2.252.205/3210.2.252.205 – 10.2.252.20510.2.252.205
7910.2.252.206/3210.2.252.206 – 10.2.252.20610.2.252.206
8010.2.252.207/3210.2.252.207 – 10.2.252.20710.2.252.207
8110.2.252.208/3210.2.252.208 – 10.2.252.20810.2.252.208
8210.2.252.209/3210.2.252.209 – 10.2.252.20910.2.252.209
8310.2.252.210/3210.2.252.210 – 10.2.252.21010.2.252.210
8410.2.252.211/3210.2.252.211 – 10.2.252.21110.2.252.211
8510.2.252.212/3210.2.252.212 – 10.2.252.21210.2.252.212
8610.2.252.213/3210.2.252.213 – 10.2.252.21310.2.252.213
8710.2.252.214/3210.2.252.214 – 10.2.252.21410.2.252.214
8810.2.252.215/3210.2.252.215 – 10.2.252.21510.2.252.215
8910.2.252.216/3210.2.252.216 – 10.2.252.21610.2.252.216
9010.2.252.217/3210.2.252.217 – 10.2.252.21710.2.252.217
9110.2.252.218/3210.2.252.218 – 10.2.252.21810.2.252.218
9210.2.252.219/3210.2.252.219 – 10.2.252.21910.2.252.219
9310.2.252.220/3210.2.252.220 – 10.2.252.22010.2.252.220
9410.2.252.221/3210.2.252.221 – 10.2.252.22110.2.252.221
9510.2.252.222/3210.2.252.222 – 10.2.252.22210.2.252.222
9610.2.252.223/3210.2.252.223 – 10.2.252.22310.2.252.223
9710.2.252.224/3210.2.252.224 – 10.2.252.22410.2.252.224
9810.2.252.225/3210.2.252.225 – 10.2.252.22510.2.252.225
9910.2.252.226/3210.2.252.226 – 10.2.252.22610.2.252.226
10010.2.252.227/3210.2.252.227 – 10.2.252.22710.2.252.227
10110.2.252.228/3210.2.252.228 – 10.2.252.22810.2.252.228
10210.2.252.229/3210.2.252.229 – 10.2.252.22910.2.252.229
10310.2.252.230/3210.2.252.230 – 10.2.252.23010.2.252.230
10410.2.252.231/3210.2.252.231 – 10.2.252.23110.2.252.231
10510.2.252.232/3210.2.252.232 – 10.2.252.23210.2.252.232
10610.2.252.233/3210.2.252.233 – 10.2.252.23310.2.252.233
10710.2.252.234/3210.2.252.234 – 10.2.252.23410.2.252.234
10810.2.252.235/3210.2.252.235 – 10.2.252.23510.2.252.235
10910.2.252.236/3210.2.252.236 – 10.2.252.23610.2.252.236
11010.2.252.237/3210.2.252.237 – 10.2.252.23710.2.252.237
11110.2.252.238/3210.2.252.238 – 10.2.252.23810.2.252.238
11210.2.252.239/3210.2.252.239 – 10.2.252.23910.2.252.239
11310.2.252.240/3210.2.252.240 – 10.2.252.24010.2.252.240
11410.2.252.241/3210.2.252.241 – 10.2.252.24110.2.252.241
11510.2.252.242/3210.2.252.242 – 10.2.252.24210.2.252.242
11610.2.252.243/3210.2.252.243 – 10.2.252.24310.2.252.243
11710.2.252.244/3210.2.252.244 – 10.2.252.24410.2.252.244
11810.2.252.245/3210.2.252.245 – 10.2.252.24510.2.252.245
11910.2.252.246/3210.2.252.246 – 10.2.252.24610.2.252.246
12010.2.252.247/3210.2.252.247 – 10.2.252.24710.2.252.247
12110.2.252.248/3210.2.252.248 – 10.2.252.24810.2.252.248
12210.2.252.249/3210.2.252.249 – 10.2.252.24910.2.252.249
12310.2.252.250/3210.2.252.250 – 10.2.252.25010.2.252.250
12410.2.252.251/3210.2.252.251 – 10.2.252.25110.2.252.251
12510.2.252.252/3210.2.252.252 – 10.2.252.25210.2.252.252
12610.2.252.253/3210.2.252.253 – 10.2.252.25310.2.252.253
12710.2.252.254/3210.2.252.254 – 10.2.252.25410.2.252.254
12810.2.252.255/3210.2.252.255 – 10.2.252.25510.2.252.255
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 →