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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)10.242.167.192/26
network10.242.167.192/26
broadcast10.242.167.255
first host10.242.167.193
last host10.242.167.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.242.167.192/26
address00001010.11110010.10100111.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.11110010.10100111.11000000
broadcast00001010.11110010.10100111.11111111
green = network part, grey = host part
hex0x0af2a7c0
decimal183674816
reverse dns192.167.242.10.in-addr.arpa
ipv4-mapped::ffff:af2:a7c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.242.167.192/3210.242.167.192 – 10.242.167.19210.242.167.192
210.242.167.193/3210.242.167.193 – 10.242.167.19310.242.167.193
310.242.167.194/3210.242.167.194 – 10.242.167.19410.242.167.194
410.242.167.195/3210.242.167.195 – 10.242.167.19510.242.167.195
510.242.167.196/3210.242.167.196 – 10.242.167.19610.242.167.196
610.242.167.197/3210.242.167.197 – 10.242.167.19710.242.167.197
710.242.167.198/3210.242.167.198 – 10.242.167.19810.242.167.198
810.242.167.199/3210.242.167.199 – 10.242.167.19910.242.167.199
910.242.167.200/3210.242.167.200 – 10.242.167.20010.242.167.200
1010.242.167.201/3210.242.167.201 – 10.242.167.20110.242.167.201
1110.242.167.202/3210.242.167.202 – 10.242.167.20210.242.167.202
1210.242.167.203/3210.242.167.203 – 10.242.167.20310.242.167.203
1310.242.167.204/3210.242.167.204 – 10.242.167.20410.242.167.204
1410.242.167.205/3210.242.167.205 – 10.242.167.20510.242.167.205
1510.242.167.206/3210.242.167.206 – 10.242.167.20610.242.167.206
1610.242.167.207/3210.242.167.207 – 10.242.167.20710.242.167.207
1710.242.167.208/3210.242.167.208 – 10.242.167.20810.242.167.208
1810.242.167.209/3210.242.167.209 – 10.242.167.20910.242.167.209
1910.242.167.210/3210.242.167.210 – 10.242.167.21010.242.167.210
2010.242.167.211/3210.242.167.211 – 10.242.167.21110.242.167.211
2110.242.167.212/3210.242.167.212 – 10.242.167.21210.242.167.212
2210.242.167.213/3210.242.167.213 – 10.242.167.21310.242.167.213
2310.242.167.214/3210.242.167.214 – 10.242.167.21410.242.167.214
2410.242.167.215/3210.242.167.215 – 10.242.167.21510.242.167.215
2510.242.167.216/3210.242.167.216 – 10.242.167.21610.242.167.216
2610.242.167.217/3210.242.167.217 – 10.242.167.21710.242.167.217
2710.242.167.218/3210.242.167.218 – 10.242.167.21810.242.167.218
2810.242.167.219/3210.242.167.219 – 10.242.167.21910.242.167.219
2910.242.167.220/3210.242.167.220 – 10.242.167.22010.242.167.220
3010.242.167.221/3210.242.167.221 – 10.242.167.22110.242.167.221
3110.242.167.222/3210.242.167.222 – 10.242.167.22210.242.167.222
3210.242.167.223/3210.242.167.223 – 10.242.167.22310.242.167.223
3310.242.167.224/3210.242.167.224 – 10.242.167.22410.242.167.224
3410.242.167.225/3210.242.167.225 – 10.242.167.22510.242.167.225
3510.242.167.226/3210.242.167.226 – 10.242.167.22610.242.167.226
3610.242.167.227/3210.242.167.227 – 10.242.167.22710.242.167.227
3710.242.167.228/3210.242.167.228 – 10.242.167.22810.242.167.228
3810.242.167.229/3210.242.167.229 – 10.242.167.22910.242.167.229
3910.242.167.230/3210.242.167.230 – 10.242.167.23010.242.167.230
4010.242.167.231/3210.242.167.231 – 10.242.167.23110.242.167.231
4110.242.167.232/3210.242.167.232 – 10.242.167.23210.242.167.232
4210.242.167.233/3210.242.167.233 – 10.242.167.23310.242.167.233
4310.242.167.234/3210.242.167.234 – 10.242.167.23410.242.167.234
4410.242.167.235/3210.242.167.235 – 10.242.167.23510.242.167.235
4510.242.167.236/3210.242.167.236 – 10.242.167.23610.242.167.236
4610.242.167.237/3210.242.167.237 – 10.242.167.23710.242.167.237
4710.242.167.238/3210.242.167.238 – 10.242.167.23810.242.167.238
4810.242.167.239/3210.242.167.239 – 10.242.167.23910.242.167.239
4910.242.167.240/3210.242.167.240 – 10.242.167.24010.242.167.240
5010.242.167.241/3210.242.167.241 – 10.242.167.24110.242.167.241
5110.242.167.242/3210.242.167.242 – 10.242.167.24210.242.167.242
5210.242.167.243/3210.242.167.243 – 10.242.167.24310.242.167.243
5310.242.167.244/3210.242.167.244 – 10.242.167.24410.242.167.244
5410.242.167.245/3210.242.167.245 – 10.242.167.24510.242.167.245
5510.242.167.246/3210.242.167.246 – 10.242.167.24610.242.167.246
5610.242.167.247/3210.242.167.247 – 10.242.167.24710.242.167.247
5710.242.167.248/3210.242.167.248 – 10.242.167.24810.242.167.248
5810.242.167.249/3210.242.167.249 – 10.242.167.24910.242.167.249
5910.242.167.250/3210.242.167.250 – 10.242.167.25010.242.167.250
6010.242.167.251/3210.242.167.251 – 10.242.167.25110.242.167.251
6110.242.167.252/3210.242.167.252 – 10.242.167.25210.242.167.252
6210.242.167.253/3210.242.167.253 – 10.242.167.25310.242.167.253
6310.242.167.254/3210.242.167.254 – 10.242.167.25410.242.167.254
6410.242.167.255/3210.242.167.255 – 10.242.167.25510.242.167.255
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 →