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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)10.149.231.192/26
network10.149.231.192/26
broadcast10.149.231.255
first host10.149.231.193
last host10.149.231.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.149.231.192/26
address00001010.10010101.11100111.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10010101.11100111.11000000
broadcast00001010.10010101.11100111.11111111
green = network part, grey = host part
hex0x0a95e7c0
decimal177596352
reverse dns192.231.149.10.in-addr.arpa
ipv4-mapped::ffff:a95:e7c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.149.231.192/3210.149.231.192 – 10.149.231.19210.149.231.192
210.149.231.193/3210.149.231.193 – 10.149.231.19310.149.231.193
310.149.231.194/3210.149.231.194 – 10.149.231.19410.149.231.194
410.149.231.195/3210.149.231.195 – 10.149.231.19510.149.231.195
510.149.231.196/3210.149.231.196 – 10.149.231.19610.149.231.196
610.149.231.197/3210.149.231.197 – 10.149.231.19710.149.231.197
710.149.231.198/3210.149.231.198 – 10.149.231.19810.149.231.198
810.149.231.199/3210.149.231.199 – 10.149.231.19910.149.231.199
910.149.231.200/3210.149.231.200 – 10.149.231.20010.149.231.200
1010.149.231.201/3210.149.231.201 – 10.149.231.20110.149.231.201
1110.149.231.202/3210.149.231.202 – 10.149.231.20210.149.231.202
1210.149.231.203/3210.149.231.203 – 10.149.231.20310.149.231.203
1310.149.231.204/3210.149.231.204 – 10.149.231.20410.149.231.204
1410.149.231.205/3210.149.231.205 – 10.149.231.20510.149.231.205
1510.149.231.206/3210.149.231.206 – 10.149.231.20610.149.231.206
1610.149.231.207/3210.149.231.207 – 10.149.231.20710.149.231.207
1710.149.231.208/3210.149.231.208 – 10.149.231.20810.149.231.208
1810.149.231.209/3210.149.231.209 – 10.149.231.20910.149.231.209
1910.149.231.210/3210.149.231.210 – 10.149.231.21010.149.231.210
2010.149.231.211/3210.149.231.211 – 10.149.231.21110.149.231.211
2110.149.231.212/3210.149.231.212 – 10.149.231.21210.149.231.212
2210.149.231.213/3210.149.231.213 – 10.149.231.21310.149.231.213
2310.149.231.214/3210.149.231.214 – 10.149.231.21410.149.231.214
2410.149.231.215/3210.149.231.215 – 10.149.231.21510.149.231.215
2510.149.231.216/3210.149.231.216 – 10.149.231.21610.149.231.216
2610.149.231.217/3210.149.231.217 – 10.149.231.21710.149.231.217
2710.149.231.218/3210.149.231.218 – 10.149.231.21810.149.231.218
2810.149.231.219/3210.149.231.219 – 10.149.231.21910.149.231.219
2910.149.231.220/3210.149.231.220 – 10.149.231.22010.149.231.220
3010.149.231.221/3210.149.231.221 – 10.149.231.22110.149.231.221
3110.149.231.222/3210.149.231.222 – 10.149.231.22210.149.231.222
3210.149.231.223/3210.149.231.223 – 10.149.231.22310.149.231.223
3310.149.231.224/3210.149.231.224 – 10.149.231.22410.149.231.224
3410.149.231.225/3210.149.231.225 – 10.149.231.22510.149.231.225
3510.149.231.226/3210.149.231.226 – 10.149.231.22610.149.231.226
3610.149.231.227/3210.149.231.227 – 10.149.231.22710.149.231.227
3710.149.231.228/3210.149.231.228 – 10.149.231.22810.149.231.228
3810.149.231.229/3210.149.231.229 – 10.149.231.22910.149.231.229
3910.149.231.230/3210.149.231.230 – 10.149.231.23010.149.231.230
4010.149.231.231/3210.149.231.231 – 10.149.231.23110.149.231.231
4110.149.231.232/3210.149.231.232 – 10.149.231.23210.149.231.232
4210.149.231.233/3210.149.231.233 – 10.149.231.23310.149.231.233
4310.149.231.234/3210.149.231.234 – 10.149.231.23410.149.231.234
4410.149.231.235/3210.149.231.235 – 10.149.231.23510.149.231.235
4510.149.231.236/3210.149.231.236 – 10.149.231.23610.149.231.236
4610.149.231.237/3210.149.231.237 – 10.149.231.23710.149.231.237
4710.149.231.238/3210.149.231.238 – 10.149.231.23810.149.231.238
4810.149.231.239/3210.149.231.239 – 10.149.231.23910.149.231.239
4910.149.231.240/3210.149.231.240 – 10.149.231.24010.149.231.240
5010.149.231.241/3210.149.231.241 – 10.149.231.24110.149.231.241
5110.149.231.242/3210.149.231.242 – 10.149.231.24210.149.231.242
5210.149.231.243/3210.149.231.243 – 10.149.231.24310.149.231.243
5310.149.231.244/3210.149.231.244 – 10.149.231.24410.149.231.244
5410.149.231.245/3210.149.231.245 – 10.149.231.24510.149.231.245
5510.149.231.246/3210.149.231.246 – 10.149.231.24610.149.231.246
5610.149.231.247/3210.149.231.247 – 10.149.231.24710.149.231.247
5710.149.231.248/3210.149.231.248 – 10.149.231.24810.149.231.248
5810.149.231.249/3210.149.231.249 – 10.149.231.24910.149.231.249
5910.149.231.250/3210.149.231.250 – 10.149.231.25010.149.231.250
6010.149.231.251/3210.149.231.251 – 10.149.231.25110.149.231.251
6110.149.231.252/3210.149.231.252 – 10.149.231.25210.149.231.252
6210.149.231.253/3210.149.231.253 – 10.149.231.25310.149.231.253
6310.149.231.254/3210.149.231.254 – 10.149.231.25410.149.231.254
6410.149.231.255/3210.149.231.255 – 10.149.231.25510.149.231.255
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 →