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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)10.78.55.192/26
network10.78.55.192/26
broadcast10.78.55.255
first host10.78.55.193
last host10.78.55.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.55.192/26
address00001010.01001110.00110111.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.00110111.11000000
broadcast00001010.01001110.00110111.11111111
green = network part, grey = host part
hex0x0a4e37c0
decimal172898240
reverse dns192.55.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:37c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.55.192/3210.78.55.192 – 10.78.55.19210.78.55.192
210.78.55.193/3210.78.55.193 – 10.78.55.19310.78.55.193
310.78.55.194/3210.78.55.194 – 10.78.55.19410.78.55.194
410.78.55.195/3210.78.55.195 – 10.78.55.19510.78.55.195
510.78.55.196/3210.78.55.196 – 10.78.55.19610.78.55.196
610.78.55.197/3210.78.55.197 – 10.78.55.19710.78.55.197
710.78.55.198/3210.78.55.198 – 10.78.55.19810.78.55.198
810.78.55.199/3210.78.55.199 – 10.78.55.19910.78.55.199
910.78.55.200/3210.78.55.200 – 10.78.55.20010.78.55.200
1010.78.55.201/3210.78.55.201 – 10.78.55.20110.78.55.201
1110.78.55.202/3210.78.55.202 – 10.78.55.20210.78.55.202
1210.78.55.203/3210.78.55.203 – 10.78.55.20310.78.55.203
1310.78.55.204/3210.78.55.204 – 10.78.55.20410.78.55.204
1410.78.55.205/3210.78.55.205 – 10.78.55.20510.78.55.205
1510.78.55.206/3210.78.55.206 – 10.78.55.20610.78.55.206
1610.78.55.207/3210.78.55.207 – 10.78.55.20710.78.55.207
1710.78.55.208/3210.78.55.208 – 10.78.55.20810.78.55.208
1810.78.55.209/3210.78.55.209 – 10.78.55.20910.78.55.209
1910.78.55.210/3210.78.55.210 – 10.78.55.21010.78.55.210
2010.78.55.211/3210.78.55.211 – 10.78.55.21110.78.55.211
2110.78.55.212/3210.78.55.212 – 10.78.55.21210.78.55.212
2210.78.55.213/3210.78.55.213 – 10.78.55.21310.78.55.213
2310.78.55.214/3210.78.55.214 – 10.78.55.21410.78.55.214
2410.78.55.215/3210.78.55.215 – 10.78.55.21510.78.55.215
2510.78.55.216/3210.78.55.216 – 10.78.55.21610.78.55.216
2610.78.55.217/3210.78.55.217 – 10.78.55.21710.78.55.217
2710.78.55.218/3210.78.55.218 – 10.78.55.21810.78.55.218
2810.78.55.219/3210.78.55.219 – 10.78.55.21910.78.55.219
2910.78.55.220/3210.78.55.220 – 10.78.55.22010.78.55.220
3010.78.55.221/3210.78.55.221 – 10.78.55.22110.78.55.221
3110.78.55.222/3210.78.55.222 – 10.78.55.22210.78.55.222
3210.78.55.223/3210.78.55.223 – 10.78.55.22310.78.55.223
3310.78.55.224/3210.78.55.224 – 10.78.55.22410.78.55.224
3410.78.55.225/3210.78.55.225 – 10.78.55.22510.78.55.225
3510.78.55.226/3210.78.55.226 – 10.78.55.22610.78.55.226
3610.78.55.227/3210.78.55.227 – 10.78.55.22710.78.55.227
3710.78.55.228/3210.78.55.228 – 10.78.55.22810.78.55.228
3810.78.55.229/3210.78.55.229 – 10.78.55.22910.78.55.229
3910.78.55.230/3210.78.55.230 – 10.78.55.23010.78.55.230
4010.78.55.231/3210.78.55.231 – 10.78.55.23110.78.55.231
4110.78.55.232/3210.78.55.232 – 10.78.55.23210.78.55.232
4210.78.55.233/3210.78.55.233 – 10.78.55.23310.78.55.233
4310.78.55.234/3210.78.55.234 – 10.78.55.23410.78.55.234
4410.78.55.235/3210.78.55.235 – 10.78.55.23510.78.55.235
4510.78.55.236/3210.78.55.236 – 10.78.55.23610.78.55.236
4610.78.55.237/3210.78.55.237 – 10.78.55.23710.78.55.237
4710.78.55.238/3210.78.55.238 – 10.78.55.23810.78.55.238
4810.78.55.239/3210.78.55.239 – 10.78.55.23910.78.55.239
4910.78.55.240/3210.78.55.240 – 10.78.55.24010.78.55.240
5010.78.55.241/3210.78.55.241 – 10.78.55.24110.78.55.241
5110.78.55.242/3210.78.55.242 – 10.78.55.24210.78.55.242
5210.78.55.243/3210.78.55.243 – 10.78.55.24310.78.55.243
5310.78.55.244/3210.78.55.244 – 10.78.55.24410.78.55.244
5410.78.55.245/3210.78.55.245 – 10.78.55.24510.78.55.245
5510.78.55.246/3210.78.55.246 – 10.78.55.24610.78.55.246
5610.78.55.247/3210.78.55.247 – 10.78.55.24710.78.55.247
5710.78.55.248/3210.78.55.248 – 10.78.55.24810.78.55.248
5810.78.55.249/3210.78.55.249 – 10.78.55.24910.78.55.249
5910.78.55.250/3210.78.55.250 – 10.78.55.25010.78.55.250
6010.78.55.251/3210.78.55.251 – 10.78.55.25110.78.55.251
6110.78.55.252/3210.78.55.252 – 10.78.55.25210.78.55.252
6210.78.55.253/3210.78.55.253 – 10.78.55.25310.78.55.253
6310.78.55.254/3210.78.55.254 – 10.78.55.25410.78.55.254
6410.78.55.255/3210.78.55.255 – 10.78.55.25510.78.55.255
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 →