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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)10.78.155.192/26
network10.78.155.192/26
broadcast10.78.155.255
first host10.78.155.193
last host10.78.155.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.155.192/26
address00001010.01001110.10011011.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.10011011.11000000
broadcast00001010.01001110.10011011.11111111
green = network part, grey = host part
hex0x0a4e9bc0
decimal172923840
reverse dns192.155.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:9bc0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.155.192/3210.78.155.192 – 10.78.155.19210.78.155.192
210.78.155.193/3210.78.155.193 – 10.78.155.19310.78.155.193
310.78.155.194/3210.78.155.194 – 10.78.155.19410.78.155.194
410.78.155.195/3210.78.155.195 – 10.78.155.19510.78.155.195
510.78.155.196/3210.78.155.196 – 10.78.155.19610.78.155.196
610.78.155.197/3210.78.155.197 – 10.78.155.19710.78.155.197
710.78.155.198/3210.78.155.198 – 10.78.155.19810.78.155.198
810.78.155.199/3210.78.155.199 – 10.78.155.19910.78.155.199
910.78.155.200/3210.78.155.200 – 10.78.155.20010.78.155.200
1010.78.155.201/3210.78.155.201 – 10.78.155.20110.78.155.201
1110.78.155.202/3210.78.155.202 – 10.78.155.20210.78.155.202
1210.78.155.203/3210.78.155.203 – 10.78.155.20310.78.155.203
1310.78.155.204/3210.78.155.204 – 10.78.155.20410.78.155.204
1410.78.155.205/3210.78.155.205 – 10.78.155.20510.78.155.205
1510.78.155.206/3210.78.155.206 – 10.78.155.20610.78.155.206
1610.78.155.207/3210.78.155.207 – 10.78.155.20710.78.155.207
1710.78.155.208/3210.78.155.208 – 10.78.155.20810.78.155.208
1810.78.155.209/3210.78.155.209 – 10.78.155.20910.78.155.209
1910.78.155.210/3210.78.155.210 – 10.78.155.21010.78.155.210
2010.78.155.211/3210.78.155.211 – 10.78.155.21110.78.155.211
2110.78.155.212/3210.78.155.212 – 10.78.155.21210.78.155.212
2210.78.155.213/3210.78.155.213 – 10.78.155.21310.78.155.213
2310.78.155.214/3210.78.155.214 – 10.78.155.21410.78.155.214
2410.78.155.215/3210.78.155.215 – 10.78.155.21510.78.155.215
2510.78.155.216/3210.78.155.216 – 10.78.155.21610.78.155.216
2610.78.155.217/3210.78.155.217 – 10.78.155.21710.78.155.217
2710.78.155.218/3210.78.155.218 – 10.78.155.21810.78.155.218
2810.78.155.219/3210.78.155.219 – 10.78.155.21910.78.155.219
2910.78.155.220/3210.78.155.220 – 10.78.155.22010.78.155.220
3010.78.155.221/3210.78.155.221 – 10.78.155.22110.78.155.221
3110.78.155.222/3210.78.155.222 – 10.78.155.22210.78.155.222
3210.78.155.223/3210.78.155.223 – 10.78.155.22310.78.155.223
3310.78.155.224/3210.78.155.224 – 10.78.155.22410.78.155.224
3410.78.155.225/3210.78.155.225 – 10.78.155.22510.78.155.225
3510.78.155.226/3210.78.155.226 – 10.78.155.22610.78.155.226
3610.78.155.227/3210.78.155.227 – 10.78.155.22710.78.155.227
3710.78.155.228/3210.78.155.228 – 10.78.155.22810.78.155.228
3810.78.155.229/3210.78.155.229 – 10.78.155.22910.78.155.229
3910.78.155.230/3210.78.155.230 – 10.78.155.23010.78.155.230
4010.78.155.231/3210.78.155.231 – 10.78.155.23110.78.155.231
4110.78.155.232/3210.78.155.232 – 10.78.155.23210.78.155.232
4210.78.155.233/3210.78.155.233 – 10.78.155.23310.78.155.233
4310.78.155.234/3210.78.155.234 – 10.78.155.23410.78.155.234
4410.78.155.235/3210.78.155.235 – 10.78.155.23510.78.155.235
4510.78.155.236/3210.78.155.236 – 10.78.155.23610.78.155.236
4610.78.155.237/3210.78.155.237 – 10.78.155.23710.78.155.237
4710.78.155.238/3210.78.155.238 – 10.78.155.23810.78.155.238
4810.78.155.239/3210.78.155.239 – 10.78.155.23910.78.155.239
4910.78.155.240/3210.78.155.240 – 10.78.155.24010.78.155.240
5010.78.155.241/3210.78.155.241 – 10.78.155.24110.78.155.241
5110.78.155.242/3210.78.155.242 – 10.78.155.24210.78.155.242
5210.78.155.243/3210.78.155.243 – 10.78.155.24310.78.155.243
5310.78.155.244/3210.78.155.244 – 10.78.155.24410.78.155.244
5410.78.155.245/3210.78.155.245 – 10.78.155.24510.78.155.245
5510.78.155.246/3210.78.155.246 – 10.78.155.24610.78.155.246
5610.78.155.247/3210.78.155.247 – 10.78.155.24710.78.155.247
5710.78.155.248/3210.78.155.248 – 10.78.155.24810.78.155.248
5810.78.155.249/3210.78.155.249 – 10.78.155.24910.78.155.249
5910.78.155.250/3210.78.155.250 – 10.78.155.25010.78.155.250
6010.78.155.251/3210.78.155.251 – 10.78.155.25110.78.155.251
6110.78.155.252/3210.78.155.252 – 10.78.155.25210.78.155.252
6210.78.155.253/3210.78.155.253 – 10.78.155.25310.78.155.253
6310.78.155.254/3210.78.155.254 – 10.78.155.25410.78.155.254
6410.78.155.255/3210.78.155.255 – 10.78.155.25510.78.155.255
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 →