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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)10.7.187.192/26
network10.7.187.192/26
broadcast10.7.187.255
first host10.7.187.193
last host10.7.187.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.7.187.192/26
address00001010.00000111.10111011.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000111.10111011.11000000
broadcast00001010.00000111.10111011.11111111
green = network part, grey = host part
hex0x0a07bbc0
decimal168278976
reverse dns192.187.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:bbc0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.7.187.192/3210.7.187.192 – 10.7.187.19210.7.187.192
210.7.187.193/3210.7.187.193 – 10.7.187.19310.7.187.193
310.7.187.194/3210.7.187.194 – 10.7.187.19410.7.187.194
410.7.187.195/3210.7.187.195 – 10.7.187.19510.7.187.195
510.7.187.196/3210.7.187.196 – 10.7.187.19610.7.187.196
610.7.187.197/3210.7.187.197 – 10.7.187.19710.7.187.197
710.7.187.198/3210.7.187.198 – 10.7.187.19810.7.187.198
810.7.187.199/3210.7.187.199 – 10.7.187.19910.7.187.199
910.7.187.200/3210.7.187.200 – 10.7.187.20010.7.187.200
1010.7.187.201/3210.7.187.201 – 10.7.187.20110.7.187.201
1110.7.187.202/3210.7.187.202 – 10.7.187.20210.7.187.202
1210.7.187.203/3210.7.187.203 – 10.7.187.20310.7.187.203
1310.7.187.204/3210.7.187.204 – 10.7.187.20410.7.187.204
1410.7.187.205/3210.7.187.205 – 10.7.187.20510.7.187.205
1510.7.187.206/3210.7.187.206 – 10.7.187.20610.7.187.206
1610.7.187.207/3210.7.187.207 – 10.7.187.20710.7.187.207
1710.7.187.208/3210.7.187.208 – 10.7.187.20810.7.187.208
1810.7.187.209/3210.7.187.209 – 10.7.187.20910.7.187.209
1910.7.187.210/3210.7.187.210 – 10.7.187.21010.7.187.210
2010.7.187.211/3210.7.187.211 – 10.7.187.21110.7.187.211
2110.7.187.212/3210.7.187.212 – 10.7.187.21210.7.187.212
2210.7.187.213/3210.7.187.213 – 10.7.187.21310.7.187.213
2310.7.187.214/3210.7.187.214 – 10.7.187.21410.7.187.214
2410.7.187.215/3210.7.187.215 – 10.7.187.21510.7.187.215
2510.7.187.216/3210.7.187.216 – 10.7.187.21610.7.187.216
2610.7.187.217/3210.7.187.217 – 10.7.187.21710.7.187.217
2710.7.187.218/3210.7.187.218 – 10.7.187.21810.7.187.218
2810.7.187.219/3210.7.187.219 – 10.7.187.21910.7.187.219
2910.7.187.220/3210.7.187.220 – 10.7.187.22010.7.187.220
3010.7.187.221/3210.7.187.221 – 10.7.187.22110.7.187.221
3110.7.187.222/3210.7.187.222 – 10.7.187.22210.7.187.222
3210.7.187.223/3210.7.187.223 – 10.7.187.22310.7.187.223
3310.7.187.224/3210.7.187.224 – 10.7.187.22410.7.187.224
3410.7.187.225/3210.7.187.225 – 10.7.187.22510.7.187.225
3510.7.187.226/3210.7.187.226 – 10.7.187.22610.7.187.226
3610.7.187.227/3210.7.187.227 – 10.7.187.22710.7.187.227
3710.7.187.228/3210.7.187.228 – 10.7.187.22810.7.187.228
3810.7.187.229/3210.7.187.229 – 10.7.187.22910.7.187.229
3910.7.187.230/3210.7.187.230 – 10.7.187.23010.7.187.230
4010.7.187.231/3210.7.187.231 – 10.7.187.23110.7.187.231
4110.7.187.232/3210.7.187.232 – 10.7.187.23210.7.187.232
4210.7.187.233/3210.7.187.233 – 10.7.187.23310.7.187.233
4310.7.187.234/3210.7.187.234 – 10.7.187.23410.7.187.234
4410.7.187.235/3210.7.187.235 – 10.7.187.23510.7.187.235
4510.7.187.236/3210.7.187.236 – 10.7.187.23610.7.187.236
4610.7.187.237/3210.7.187.237 – 10.7.187.23710.7.187.237
4710.7.187.238/3210.7.187.238 – 10.7.187.23810.7.187.238
4810.7.187.239/3210.7.187.239 – 10.7.187.23910.7.187.239
4910.7.187.240/3210.7.187.240 – 10.7.187.24010.7.187.240
5010.7.187.241/3210.7.187.241 – 10.7.187.24110.7.187.241
5110.7.187.242/3210.7.187.242 – 10.7.187.24210.7.187.242
5210.7.187.243/3210.7.187.243 – 10.7.187.24310.7.187.243
5310.7.187.244/3210.7.187.244 – 10.7.187.24410.7.187.244
5410.7.187.245/3210.7.187.245 – 10.7.187.24510.7.187.245
5510.7.187.246/3210.7.187.246 – 10.7.187.24610.7.187.246
5610.7.187.247/3210.7.187.247 – 10.7.187.24710.7.187.247
5710.7.187.248/3210.7.187.248 – 10.7.187.24810.7.187.248
5810.7.187.249/3210.7.187.249 – 10.7.187.24910.7.187.249
5910.7.187.250/3210.7.187.250 – 10.7.187.25010.7.187.250
6010.7.187.251/3210.7.187.251 – 10.7.187.25110.7.187.251
6110.7.187.252/3210.7.187.252 – 10.7.187.25210.7.187.252
6210.7.187.253/3210.7.187.253 – 10.7.187.25310.7.187.253
6310.7.187.254/3210.7.187.254 – 10.7.187.25410.7.187.254
6410.7.187.255/3210.7.187.255 – 10.7.187.25510.7.187.255
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 →