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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)10.3.8.192/26
network10.3.8.192/26
broadcast10.3.8.255
first host10.3.8.193
last host10.3.8.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.8.192/26
address00001010.00000011.00001000.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.00001000.11000000
broadcast00001010.00000011.00001000.11111111
green = network part, grey = host part
hex0x0a0308c0
decimal167971008
reverse dns192.8.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:8c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.8.192/3210.3.8.192 – 10.3.8.19210.3.8.192
210.3.8.193/3210.3.8.193 – 10.3.8.19310.3.8.193
310.3.8.194/3210.3.8.194 – 10.3.8.19410.3.8.194
410.3.8.195/3210.3.8.195 – 10.3.8.19510.3.8.195
510.3.8.196/3210.3.8.196 – 10.3.8.19610.3.8.196
610.3.8.197/3210.3.8.197 – 10.3.8.19710.3.8.197
710.3.8.198/3210.3.8.198 – 10.3.8.19810.3.8.198
810.3.8.199/3210.3.8.199 – 10.3.8.19910.3.8.199
910.3.8.200/3210.3.8.200 – 10.3.8.20010.3.8.200
1010.3.8.201/3210.3.8.201 – 10.3.8.20110.3.8.201
1110.3.8.202/3210.3.8.202 – 10.3.8.20210.3.8.202
1210.3.8.203/3210.3.8.203 – 10.3.8.20310.3.8.203
1310.3.8.204/3210.3.8.204 – 10.3.8.20410.3.8.204
1410.3.8.205/3210.3.8.205 – 10.3.8.20510.3.8.205
1510.3.8.206/3210.3.8.206 – 10.3.8.20610.3.8.206
1610.3.8.207/3210.3.8.207 – 10.3.8.20710.3.8.207
1710.3.8.208/3210.3.8.208 – 10.3.8.20810.3.8.208
1810.3.8.209/3210.3.8.209 – 10.3.8.20910.3.8.209
1910.3.8.210/3210.3.8.210 – 10.3.8.21010.3.8.210
2010.3.8.211/3210.3.8.211 – 10.3.8.21110.3.8.211
2110.3.8.212/3210.3.8.212 – 10.3.8.21210.3.8.212
2210.3.8.213/3210.3.8.213 – 10.3.8.21310.3.8.213
2310.3.8.214/3210.3.8.214 – 10.3.8.21410.3.8.214
2410.3.8.215/3210.3.8.215 – 10.3.8.21510.3.8.215
2510.3.8.216/3210.3.8.216 – 10.3.8.21610.3.8.216
2610.3.8.217/3210.3.8.217 – 10.3.8.21710.3.8.217
2710.3.8.218/3210.3.8.218 – 10.3.8.21810.3.8.218
2810.3.8.219/3210.3.8.219 – 10.3.8.21910.3.8.219
2910.3.8.220/3210.3.8.220 – 10.3.8.22010.3.8.220
3010.3.8.221/3210.3.8.221 – 10.3.8.22110.3.8.221
3110.3.8.222/3210.3.8.222 – 10.3.8.22210.3.8.222
3210.3.8.223/3210.3.8.223 – 10.3.8.22310.3.8.223
3310.3.8.224/3210.3.8.224 – 10.3.8.22410.3.8.224
3410.3.8.225/3210.3.8.225 – 10.3.8.22510.3.8.225
3510.3.8.226/3210.3.8.226 – 10.3.8.22610.3.8.226
3610.3.8.227/3210.3.8.227 – 10.3.8.22710.3.8.227
3710.3.8.228/3210.3.8.228 – 10.3.8.22810.3.8.228
3810.3.8.229/3210.3.8.229 – 10.3.8.22910.3.8.229
3910.3.8.230/3210.3.8.230 – 10.3.8.23010.3.8.230
4010.3.8.231/3210.3.8.231 – 10.3.8.23110.3.8.231
4110.3.8.232/3210.3.8.232 – 10.3.8.23210.3.8.232
4210.3.8.233/3210.3.8.233 – 10.3.8.23310.3.8.233
4310.3.8.234/3210.3.8.234 – 10.3.8.23410.3.8.234
4410.3.8.235/3210.3.8.235 – 10.3.8.23510.3.8.235
4510.3.8.236/3210.3.8.236 – 10.3.8.23610.3.8.236
4610.3.8.237/3210.3.8.237 – 10.3.8.23710.3.8.237
4710.3.8.238/3210.3.8.238 – 10.3.8.23810.3.8.238
4810.3.8.239/3210.3.8.239 – 10.3.8.23910.3.8.239
4910.3.8.240/3210.3.8.240 – 10.3.8.24010.3.8.240
5010.3.8.241/3210.3.8.241 – 10.3.8.24110.3.8.241
5110.3.8.242/3210.3.8.242 – 10.3.8.24210.3.8.242
5210.3.8.243/3210.3.8.243 – 10.3.8.24310.3.8.243
5310.3.8.244/3210.3.8.244 – 10.3.8.24410.3.8.244
5410.3.8.245/3210.3.8.245 – 10.3.8.24510.3.8.245
5510.3.8.246/3210.3.8.246 – 10.3.8.24610.3.8.246
5610.3.8.247/3210.3.8.247 – 10.3.8.24710.3.8.247
5710.3.8.248/3210.3.8.248 – 10.3.8.24810.3.8.248
5810.3.8.249/3210.3.8.249 – 10.3.8.24910.3.8.249
5910.3.8.250/3210.3.8.250 – 10.3.8.25010.3.8.250
6010.3.8.251/3210.3.8.251 – 10.3.8.25110.3.8.251
6110.3.8.252/3210.3.8.252 – 10.3.8.25210.3.8.252
6210.3.8.253/3210.3.8.253 – 10.3.8.25310.3.8.253
6310.3.8.254/3210.3.8.254 – 10.3.8.25410.3.8.254
6410.3.8.255/3210.3.8.255 – 10.3.8.25510.3.8.255
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 →