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)10.2.207.192/26
network10.2.207.192/26
broadcast10.2.207.255
first host10.2.207.193
last host10.2.207.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.207.192/26
address00001010.00000010.11001111.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.11001111.11000000
broadcast00001010.00000010.11001111.11111111
green = network part, grey = host part
hex0x0a02cfc0
decimal167956416
reverse dns192.207.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:cfc0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.207.192/3210.2.207.192 – 10.2.207.19210.2.207.192
210.2.207.193/3210.2.207.193 – 10.2.207.19310.2.207.193
310.2.207.194/3210.2.207.194 – 10.2.207.19410.2.207.194
410.2.207.195/3210.2.207.195 – 10.2.207.19510.2.207.195
510.2.207.196/3210.2.207.196 – 10.2.207.19610.2.207.196
610.2.207.197/3210.2.207.197 – 10.2.207.19710.2.207.197
710.2.207.198/3210.2.207.198 – 10.2.207.19810.2.207.198
810.2.207.199/3210.2.207.199 – 10.2.207.19910.2.207.199
910.2.207.200/3210.2.207.200 – 10.2.207.20010.2.207.200
1010.2.207.201/3210.2.207.201 – 10.2.207.20110.2.207.201
1110.2.207.202/3210.2.207.202 – 10.2.207.20210.2.207.202
1210.2.207.203/3210.2.207.203 – 10.2.207.20310.2.207.203
1310.2.207.204/3210.2.207.204 – 10.2.207.20410.2.207.204
1410.2.207.205/3210.2.207.205 – 10.2.207.20510.2.207.205
1510.2.207.206/3210.2.207.206 – 10.2.207.20610.2.207.206
1610.2.207.207/3210.2.207.207 – 10.2.207.20710.2.207.207
1710.2.207.208/3210.2.207.208 – 10.2.207.20810.2.207.208
1810.2.207.209/3210.2.207.209 – 10.2.207.20910.2.207.209
1910.2.207.210/3210.2.207.210 – 10.2.207.21010.2.207.210
2010.2.207.211/3210.2.207.211 – 10.2.207.21110.2.207.211
2110.2.207.212/3210.2.207.212 – 10.2.207.21210.2.207.212
2210.2.207.213/3210.2.207.213 – 10.2.207.21310.2.207.213
2310.2.207.214/3210.2.207.214 – 10.2.207.21410.2.207.214
2410.2.207.215/3210.2.207.215 – 10.2.207.21510.2.207.215
2510.2.207.216/3210.2.207.216 – 10.2.207.21610.2.207.216
2610.2.207.217/3210.2.207.217 – 10.2.207.21710.2.207.217
2710.2.207.218/3210.2.207.218 – 10.2.207.21810.2.207.218
2810.2.207.219/3210.2.207.219 – 10.2.207.21910.2.207.219
2910.2.207.220/3210.2.207.220 – 10.2.207.22010.2.207.220
3010.2.207.221/3210.2.207.221 – 10.2.207.22110.2.207.221
3110.2.207.222/3210.2.207.222 – 10.2.207.22210.2.207.222
3210.2.207.223/3210.2.207.223 – 10.2.207.22310.2.207.223
3310.2.207.224/3210.2.207.224 – 10.2.207.22410.2.207.224
3410.2.207.225/3210.2.207.225 – 10.2.207.22510.2.207.225
3510.2.207.226/3210.2.207.226 – 10.2.207.22610.2.207.226
3610.2.207.227/3210.2.207.227 – 10.2.207.22710.2.207.227
3710.2.207.228/3210.2.207.228 – 10.2.207.22810.2.207.228
3810.2.207.229/3210.2.207.229 – 10.2.207.22910.2.207.229
3910.2.207.230/3210.2.207.230 – 10.2.207.23010.2.207.230
4010.2.207.231/3210.2.207.231 – 10.2.207.23110.2.207.231
4110.2.207.232/3210.2.207.232 – 10.2.207.23210.2.207.232
4210.2.207.233/3210.2.207.233 – 10.2.207.23310.2.207.233
4310.2.207.234/3210.2.207.234 – 10.2.207.23410.2.207.234
4410.2.207.235/3210.2.207.235 – 10.2.207.23510.2.207.235
4510.2.207.236/3210.2.207.236 – 10.2.207.23610.2.207.236
4610.2.207.237/3210.2.207.237 – 10.2.207.23710.2.207.237
4710.2.207.238/3210.2.207.238 – 10.2.207.23810.2.207.238
4810.2.207.239/3210.2.207.239 – 10.2.207.23910.2.207.239
4910.2.207.240/3210.2.207.240 – 10.2.207.24010.2.207.240
5010.2.207.241/3210.2.207.241 – 10.2.207.24110.2.207.241
5110.2.207.242/3210.2.207.242 – 10.2.207.24210.2.207.242
5210.2.207.243/3210.2.207.243 – 10.2.207.24310.2.207.243
5310.2.207.244/3210.2.207.244 – 10.2.207.24410.2.207.244
5410.2.207.245/3210.2.207.245 – 10.2.207.24510.2.207.245
5510.2.207.246/3210.2.207.246 – 10.2.207.24610.2.207.246
5610.2.207.247/3210.2.207.247 – 10.2.207.24710.2.207.247
5710.2.207.248/3210.2.207.248 – 10.2.207.24810.2.207.248
5810.2.207.249/3210.2.207.249 – 10.2.207.24910.2.207.249
5910.2.207.250/3210.2.207.250 – 10.2.207.25010.2.207.250
6010.2.207.251/3210.2.207.251 – 10.2.207.25110.2.207.251
6110.2.207.252/3210.2.207.252 – 10.2.207.25210.2.207.252
6210.2.207.253/3210.2.207.253 – 10.2.207.25310.2.207.253
6310.2.207.254/3210.2.207.254 – 10.2.207.25410.2.207.254
6410.2.207.255/3210.2.207.255 – 10.2.207.25510.2.207.255
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 →