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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)10.2.70.192/26
network10.2.70.192/26
broadcast10.2.70.255
first host10.2.70.193
last host10.2.70.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.70.192/26
address00001010.00000010.01000110.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.01000110.11000000
broadcast00001010.00000010.01000110.11111111
green = network part, grey = host part
hex0x0a0246c0
decimal167921344
reverse dns192.70.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:46c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.70.192/3210.2.70.192 – 10.2.70.19210.2.70.192
210.2.70.193/3210.2.70.193 – 10.2.70.19310.2.70.193
310.2.70.194/3210.2.70.194 – 10.2.70.19410.2.70.194
410.2.70.195/3210.2.70.195 – 10.2.70.19510.2.70.195
510.2.70.196/3210.2.70.196 – 10.2.70.19610.2.70.196
610.2.70.197/3210.2.70.197 – 10.2.70.19710.2.70.197
710.2.70.198/3210.2.70.198 – 10.2.70.19810.2.70.198
810.2.70.199/3210.2.70.199 – 10.2.70.19910.2.70.199
910.2.70.200/3210.2.70.200 – 10.2.70.20010.2.70.200
1010.2.70.201/3210.2.70.201 – 10.2.70.20110.2.70.201
1110.2.70.202/3210.2.70.202 – 10.2.70.20210.2.70.202
1210.2.70.203/3210.2.70.203 – 10.2.70.20310.2.70.203
1310.2.70.204/3210.2.70.204 – 10.2.70.20410.2.70.204
1410.2.70.205/3210.2.70.205 – 10.2.70.20510.2.70.205
1510.2.70.206/3210.2.70.206 – 10.2.70.20610.2.70.206
1610.2.70.207/3210.2.70.207 – 10.2.70.20710.2.70.207
1710.2.70.208/3210.2.70.208 – 10.2.70.20810.2.70.208
1810.2.70.209/3210.2.70.209 – 10.2.70.20910.2.70.209
1910.2.70.210/3210.2.70.210 – 10.2.70.21010.2.70.210
2010.2.70.211/3210.2.70.211 – 10.2.70.21110.2.70.211
2110.2.70.212/3210.2.70.212 – 10.2.70.21210.2.70.212
2210.2.70.213/3210.2.70.213 – 10.2.70.21310.2.70.213
2310.2.70.214/3210.2.70.214 – 10.2.70.21410.2.70.214
2410.2.70.215/3210.2.70.215 – 10.2.70.21510.2.70.215
2510.2.70.216/3210.2.70.216 – 10.2.70.21610.2.70.216
2610.2.70.217/3210.2.70.217 – 10.2.70.21710.2.70.217
2710.2.70.218/3210.2.70.218 – 10.2.70.21810.2.70.218
2810.2.70.219/3210.2.70.219 – 10.2.70.21910.2.70.219
2910.2.70.220/3210.2.70.220 – 10.2.70.22010.2.70.220
3010.2.70.221/3210.2.70.221 – 10.2.70.22110.2.70.221
3110.2.70.222/3210.2.70.222 – 10.2.70.22210.2.70.222
3210.2.70.223/3210.2.70.223 – 10.2.70.22310.2.70.223
3310.2.70.224/3210.2.70.224 – 10.2.70.22410.2.70.224
3410.2.70.225/3210.2.70.225 – 10.2.70.22510.2.70.225
3510.2.70.226/3210.2.70.226 – 10.2.70.22610.2.70.226
3610.2.70.227/3210.2.70.227 – 10.2.70.22710.2.70.227
3710.2.70.228/3210.2.70.228 – 10.2.70.22810.2.70.228
3810.2.70.229/3210.2.70.229 – 10.2.70.22910.2.70.229
3910.2.70.230/3210.2.70.230 – 10.2.70.23010.2.70.230
4010.2.70.231/3210.2.70.231 – 10.2.70.23110.2.70.231
4110.2.70.232/3210.2.70.232 – 10.2.70.23210.2.70.232
4210.2.70.233/3210.2.70.233 – 10.2.70.23310.2.70.233
4310.2.70.234/3210.2.70.234 – 10.2.70.23410.2.70.234
4410.2.70.235/3210.2.70.235 – 10.2.70.23510.2.70.235
4510.2.70.236/3210.2.70.236 – 10.2.70.23610.2.70.236
4610.2.70.237/3210.2.70.237 – 10.2.70.23710.2.70.237
4710.2.70.238/3210.2.70.238 – 10.2.70.23810.2.70.238
4810.2.70.239/3210.2.70.239 – 10.2.70.23910.2.70.239
4910.2.70.240/3210.2.70.240 – 10.2.70.24010.2.70.240
5010.2.70.241/3210.2.70.241 – 10.2.70.24110.2.70.241
5110.2.70.242/3210.2.70.242 – 10.2.70.24210.2.70.242
5210.2.70.243/3210.2.70.243 – 10.2.70.24310.2.70.243
5310.2.70.244/3210.2.70.244 – 10.2.70.24410.2.70.244
5410.2.70.245/3210.2.70.245 – 10.2.70.24510.2.70.245
5510.2.70.246/3210.2.70.246 – 10.2.70.24610.2.70.246
5610.2.70.247/3210.2.70.247 – 10.2.70.24710.2.70.247
5710.2.70.248/3210.2.70.248 – 10.2.70.24810.2.70.248
5810.2.70.249/3210.2.70.249 – 10.2.70.24910.2.70.249
5910.2.70.250/3210.2.70.250 – 10.2.70.25010.2.70.250
6010.2.70.251/3210.2.70.251 – 10.2.70.25110.2.70.251
6110.2.70.252/3210.2.70.252 – 10.2.70.25210.2.70.252
6210.2.70.253/3210.2.70.253 – 10.2.70.25310.2.70.253
6310.2.70.254/3210.2.70.254 – 10.2.70.25410.2.70.254
6410.2.70.255/3210.2.70.255 – 10.2.70.25510.2.70.255
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 →