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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)10.131.82.192/26
network10.131.82.192/26
broadcast10.131.82.255
first host10.131.82.193
last host10.131.82.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.131.82.192/26
address00001010.10000011.01010010.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10000011.01010010.11000000
broadcast00001010.10000011.01010010.11111111
green = network part, grey = host part
hex0x0a8352c0
decimal176378560
reverse dns192.82.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:52c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.131.82.192/3210.131.82.192 – 10.131.82.19210.131.82.192
210.131.82.193/3210.131.82.193 – 10.131.82.19310.131.82.193
310.131.82.194/3210.131.82.194 – 10.131.82.19410.131.82.194
410.131.82.195/3210.131.82.195 – 10.131.82.19510.131.82.195
510.131.82.196/3210.131.82.196 – 10.131.82.19610.131.82.196
610.131.82.197/3210.131.82.197 – 10.131.82.19710.131.82.197
710.131.82.198/3210.131.82.198 – 10.131.82.19810.131.82.198
810.131.82.199/3210.131.82.199 – 10.131.82.19910.131.82.199
910.131.82.200/3210.131.82.200 – 10.131.82.20010.131.82.200
1010.131.82.201/3210.131.82.201 – 10.131.82.20110.131.82.201
1110.131.82.202/3210.131.82.202 – 10.131.82.20210.131.82.202
1210.131.82.203/3210.131.82.203 – 10.131.82.20310.131.82.203
1310.131.82.204/3210.131.82.204 – 10.131.82.20410.131.82.204
1410.131.82.205/3210.131.82.205 – 10.131.82.20510.131.82.205
1510.131.82.206/3210.131.82.206 – 10.131.82.20610.131.82.206
1610.131.82.207/3210.131.82.207 – 10.131.82.20710.131.82.207
1710.131.82.208/3210.131.82.208 – 10.131.82.20810.131.82.208
1810.131.82.209/3210.131.82.209 – 10.131.82.20910.131.82.209
1910.131.82.210/3210.131.82.210 – 10.131.82.21010.131.82.210
2010.131.82.211/3210.131.82.211 – 10.131.82.21110.131.82.211
2110.131.82.212/3210.131.82.212 – 10.131.82.21210.131.82.212
2210.131.82.213/3210.131.82.213 – 10.131.82.21310.131.82.213
2310.131.82.214/3210.131.82.214 – 10.131.82.21410.131.82.214
2410.131.82.215/3210.131.82.215 – 10.131.82.21510.131.82.215
2510.131.82.216/3210.131.82.216 – 10.131.82.21610.131.82.216
2610.131.82.217/3210.131.82.217 – 10.131.82.21710.131.82.217
2710.131.82.218/3210.131.82.218 – 10.131.82.21810.131.82.218
2810.131.82.219/3210.131.82.219 – 10.131.82.21910.131.82.219
2910.131.82.220/3210.131.82.220 – 10.131.82.22010.131.82.220
3010.131.82.221/3210.131.82.221 – 10.131.82.22110.131.82.221
3110.131.82.222/3210.131.82.222 – 10.131.82.22210.131.82.222
3210.131.82.223/3210.131.82.223 – 10.131.82.22310.131.82.223
3310.131.82.224/3210.131.82.224 – 10.131.82.22410.131.82.224
3410.131.82.225/3210.131.82.225 – 10.131.82.22510.131.82.225
3510.131.82.226/3210.131.82.226 – 10.131.82.22610.131.82.226
3610.131.82.227/3210.131.82.227 – 10.131.82.22710.131.82.227
3710.131.82.228/3210.131.82.228 – 10.131.82.22810.131.82.228
3810.131.82.229/3210.131.82.229 – 10.131.82.22910.131.82.229
3910.131.82.230/3210.131.82.230 – 10.131.82.23010.131.82.230
4010.131.82.231/3210.131.82.231 – 10.131.82.23110.131.82.231
4110.131.82.232/3210.131.82.232 – 10.131.82.23210.131.82.232
4210.131.82.233/3210.131.82.233 – 10.131.82.23310.131.82.233
4310.131.82.234/3210.131.82.234 – 10.131.82.23410.131.82.234
4410.131.82.235/3210.131.82.235 – 10.131.82.23510.131.82.235
4510.131.82.236/3210.131.82.236 – 10.131.82.23610.131.82.236
4610.131.82.237/3210.131.82.237 – 10.131.82.23710.131.82.237
4710.131.82.238/3210.131.82.238 – 10.131.82.23810.131.82.238
4810.131.82.239/3210.131.82.239 – 10.131.82.23910.131.82.239
4910.131.82.240/3210.131.82.240 – 10.131.82.24010.131.82.240
5010.131.82.241/3210.131.82.241 – 10.131.82.24110.131.82.241
5110.131.82.242/3210.131.82.242 – 10.131.82.24210.131.82.242
5210.131.82.243/3210.131.82.243 – 10.131.82.24310.131.82.243
5310.131.82.244/3210.131.82.244 – 10.131.82.24410.131.82.244
5410.131.82.245/3210.131.82.245 – 10.131.82.24510.131.82.245
5510.131.82.246/3210.131.82.246 – 10.131.82.24610.131.82.246
5610.131.82.247/3210.131.82.247 – 10.131.82.24710.131.82.247
5710.131.82.248/3210.131.82.248 – 10.131.82.24810.131.82.248
5810.131.82.249/3210.131.82.249 – 10.131.82.24910.131.82.249
5910.131.82.250/3210.131.82.250 – 10.131.82.25010.131.82.250
6010.131.82.251/3210.131.82.251 – 10.131.82.25110.131.82.251
6110.131.82.252/3210.131.82.252 – 10.131.82.25210.131.82.252
6210.131.82.253/3210.131.82.253 – 10.131.82.25310.131.82.253
6310.131.82.254/3210.131.82.254 – 10.131.82.25410.131.82.254
6410.131.82.255/3210.131.82.255 – 10.131.82.25510.131.82.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /26
/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-
/25255.255.255.128128126-
/26255.255.255.19264621
/27255.255.255.22432302 split →
/28255.255.255.24016144 split →
/29255.255.255.248868 split →
/30255.255.255.2524216 split →
/31255.255.255.2542232 split →
/32255.255.255.2551164 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 →