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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)10.0.158.192/26
network10.0.158.192/26
broadcast10.0.158.255
first host10.0.158.193
last host10.0.158.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.0.158.192/26
address00001010.00000000.10011110.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000000.10011110.11000000
broadcast00001010.00000000.10011110.11111111
green = network part, grey = host part
hex0x0a009ec0
decimal167812800
reverse dns192.158.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:9ec0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.158.192/3210.0.158.192 – 10.0.158.19210.0.158.192
210.0.158.193/3210.0.158.193 – 10.0.158.19310.0.158.193
310.0.158.194/3210.0.158.194 – 10.0.158.19410.0.158.194
410.0.158.195/3210.0.158.195 – 10.0.158.19510.0.158.195
510.0.158.196/3210.0.158.196 – 10.0.158.19610.0.158.196
610.0.158.197/3210.0.158.197 – 10.0.158.19710.0.158.197
710.0.158.198/3210.0.158.198 – 10.0.158.19810.0.158.198
810.0.158.199/3210.0.158.199 – 10.0.158.19910.0.158.199
910.0.158.200/3210.0.158.200 – 10.0.158.20010.0.158.200
1010.0.158.201/3210.0.158.201 – 10.0.158.20110.0.158.201
1110.0.158.202/3210.0.158.202 – 10.0.158.20210.0.158.202
1210.0.158.203/3210.0.158.203 – 10.0.158.20310.0.158.203
1310.0.158.204/3210.0.158.204 – 10.0.158.20410.0.158.204
1410.0.158.205/3210.0.158.205 – 10.0.158.20510.0.158.205
1510.0.158.206/3210.0.158.206 – 10.0.158.20610.0.158.206
1610.0.158.207/3210.0.158.207 – 10.0.158.20710.0.158.207
1710.0.158.208/3210.0.158.208 – 10.0.158.20810.0.158.208
1810.0.158.209/3210.0.158.209 – 10.0.158.20910.0.158.209
1910.0.158.210/3210.0.158.210 – 10.0.158.21010.0.158.210
2010.0.158.211/3210.0.158.211 – 10.0.158.21110.0.158.211
2110.0.158.212/3210.0.158.212 – 10.0.158.21210.0.158.212
2210.0.158.213/3210.0.158.213 – 10.0.158.21310.0.158.213
2310.0.158.214/3210.0.158.214 – 10.0.158.21410.0.158.214
2410.0.158.215/3210.0.158.215 – 10.0.158.21510.0.158.215
2510.0.158.216/3210.0.158.216 – 10.0.158.21610.0.158.216
2610.0.158.217/3210.0.158.217 – 10.0.158.21710.0.158.217
2710.0.158.218/3210.0.158.218 – 10.0.158.21810.0.158.218
2810.0.158.219/3210.0.158.219 – 10.0.158.21910.0.158.219
2910.0.158.220/3210.0.158.220 – 10.0.158.22010.0.158.220
3010.0.158.221/3210.0.158.221 – 10.0.158.22110.0.158.221
3110.0.158.222/3210.0.158.222 – 10.0.158.22210.0.158.222
3210.0.158.223/3210.0.158.223 – 10.0.158.22310.0.158.223
3310.0.158.224/3210.0.158.224 – 10.0.158.22410.0.158.224
3410.0.158.225/3210.0.158.225 – 10.0.158.22510.0.158.225
3510.0.158.226/3210.0.158.226 – 10.0.158.22610.0.158.226
3610.0.158.227/3210.0.158.227 – 10.0.158.22710.0.158.227
3710.0.158.228/3210.0.158.228 – 10.0.158.22810.0.158.228
3810.0.158.229/3210.0.158.229 – 10.0.158.22910.0.158.229
3910.0.158.230/3210.0.158.230 – 10.0.158.23010.0.158.230
4010.0.158.231/3210.0.158.231 – 10.0.158.23110.0.158.231
4110.0.158.232/3210.0.158.232 – 10.0.158.23210.0.158.232
4210.0.158.233/3210.0.158.233 – 10.0.158.23310.0.158.233
4310.0.158.234/3210.0.158.234 – 10.0.158.23410.0.158.234
4410.0.158.235/3210.0.158.235 – 10.0.158.23510.0.158.235
4510.0.158.236/3210.0.158.236 – 10.0.158.23610.0.158.236
4610.0.158.237/3210.0.158.237 – 10.0.158.23710.0.158.237
4710.0.158.238/3210.0.158.238 – 10.0.158.23810.0.158.238
4810.0.158.239/3210.0.158.239 – 10.0.158.23910.0.158.239
4910.0.158.240/3210.0.158.240 – 10.0.158.24010.0.158.240
5010.0.158.241/3210.0.158.241 – 10.0.158.24110.0.158.241
5110.0.158.242/3210.0.158.242 – 10.0.158.24210.0.158.242
5210.0.158.243/3210.0.158.243 – 10.0.158.24310.0.158.243
5310.0.158.244/3210.0.158.244 – 10.0.158.24410.0.158.244
5410.0.158.245/3210.0.158.245 – 10.0.158.24510.0.158.245
5510.0.158.246/3210.0.158.246 – 10.0.158.24610.0.158.246
5610.0.158.247/3210.0.158.247 – 10.0.158.24710.0.158.247
5710.0.158.248/3210.0.158.248 – 10.0.158.24810.0.158.248
5810.0.158.249/3210.0.158.249 – 10.0.158.24910.0.158.249
5910.0.158.250/3210.0.158.250 – 10.0.158.25010.0.158.250
6010.0.158.251/3210.0.158.251 – 10.0.158.25110.0.158.251
6110.0.158.252/3210.0.158.252 – 10.0.158.25210.0.158.252
6210.0.158.253/3210.0.158.253 – 10.0.158.25310.0.158.253
6310.0.158.254/3210.0.158.254 – 10.0.158.25410.0.158.254
6410.0.158.255/3210.0.158.255 – 10.0.158.25510.0.158.255
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 →