ip
ipku.in

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)10.3.64.192/26
network10.3.64.192/26
broadcast10.3.64.255
first host10.3.64.193
last host10.3.64.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.64.192/26
address00001010.00000011.01000000.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.01000000.11000000
broadcast00001010.00000011.01000000.11111111
green = network part, grey = host part
hex0x0a0340c0
decimal167985344
reverse dns192.64.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:40c0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.64.192/3210.3.64.192 – 10.3.64.19210.3.64.192
210.3.64.193/3210.3.64.193 – 10.3.64.19310.3.64.193
310.3.64.194/3210.3.64.194 – 10.3.64.19410.3.64.194
410.3.64.195/3210.3.64.195 – 10.3.64.19510.3.64.195
510.3.64.196/3210.3.64.196 – 10.3.64.19610.3.64.196
610.3.64.197/3210.3.64.197 – 10.3.64.19710.3.64.197
710.3.64.198/3210.3.64.198 – 10.3.64.19810.3.64.198
810.3.64.199/3210.3.64.199 – 10.3.64.19910.3.64.199
910.3.64.200/3210.3.64.200 – 10.3.64.20010.3.64.200
1010.3.64.201/3210.3.64.201 – 10.3.64.20110.3.64.201
1110.3.64.202/3210.3.64.202 – 10.3.64.20210.3.64.202
1210.3.64.203/3210.3.64.203 – 10.3.64.20310.3.64.203
1310.3.64.204/3210.3.64.204 – 10.3.64.20410.3.64.204
1410.3.64.205/3210.3.64.205 – 10.3.64.20510.3.64.205
1510.3.64.206/3210.3.64.206 – 10.3.64.20610.3.64.206
1610.3.64.207/3210.3.64.207 – 10.3.64.20710.3.64.207
1710.3.64.208/3210.3.64.208 – 10.3.64.20810.3.64.208
1810.3.64.209/3210.3.64.209 – 10.3.64.20910.3.64.209
1910.3.64.210/3210.3.64.210 – 10.3.64.21010.3.64.210
2010.3.64.211/3210.3.64.211 – 10.3.64.21110.3.64.211
2110.3.64.212/3210.3.64.212 – 10.3.64.21210.3.64.212
2210.3.64.213/3210.3.64.213 – 10.3.64.21310.3.64.213
2310.3.64.214/3210.3.64.214 – 10.3.64.21410.3.64.214
2410.3.64.215/3210.3.64.215 – 10.3.64.21510.3.64.215
2510.3.64.216/3210.3.64.216 – 10.3.64.21610.3.64.216
2610.3.64.217/3210.3.64.217 – 10.3.64.21710.3.64.217
2710.3.64.218/3210.3.64.218 – 10.3.64.21810.3.64.218
2810.3.64.219/3210.3.64.219 – 10.3.64.21910.3.64.219
2910.3.64.220/3210.3.64.220 – 10.3.64.22010.3.64.220
3010.3.64.221/3210.3.64.221 – 10.3.64.22110.3.64.221
3110.3.64.222/3210.3.64.222 – 10.3.64.22210.3.64.222
3210.3.64.223/3210.3.64.223 – 10.3.64.22310.3.64.223
3310.3.64.224/3210.3.64.224 – 10.3.64.22410.3.64.224
3410.3.64.225/3210.3.64.225 – 10.3.64.22510.3.64.225
3510.3.64.226/3210.3.64.226 – 10.3.64.22610.3.64.226
3610.3.64.227/3210.3.64.227 – 10.3.64.22710.3.64.227
3710.3.64.228/3210.3.64.228 – 10.3.64.22810.3.64.228
3810.3.64.229/3210.3.64.229 – 10.3.64.22910.3.64.229
3910.3.64.230/3210.3.64.230 – 10.3.64.23010.3.64.230
4010.3.64.231/3210.3.64.231 – 10.3.64.23110.3.64.231
4110.3.64.232/3210.3.64.232 – 10.3.64.23210.3.64.232
4210.3.64.233/3210.3.64.233 – 10.3.64.23310.3.64.233
4310.3.64.234/3210.3.64.234 – 10.3.64.23410.3.64.234
4410.3.64.235/3210.3.64.235 – 10.3.64.23510.3.64.235
4510.3.64.236/3210.3.64.236 – 10.3.64.23610.3.64.236
4610.3.64.237/3210.3.64.237 – 10.3.64.23710.3.64.237
4710.3.64.238/3210.3.64.238 – 10.3.64.23810.3.64.238
4810.3.64.239/3210.3.64.239 – 10.3.64.23910.3.64.239
4910.3.64.240/3210.3.64.240 – 10.3.64.24010.3.64.240
5010.3.64.241/3210.3.64.241 – 10.3.64.24110.3.64.241
5110.3.64.242/3210.3.64.242 – 10.3.64.24210.3.64.242
5210.3.64.243/3210.3.64.243 – 10.3.64.24310.3.64.243
5310.3.64.244/3210.3.64.244 – 10.3.64.24410.3.64.244
5410.3.64.245/3210.3.64.245 – 10.3.64.24510.3.64.245
5510.3.64.246/3210.3.64.246 – 10.3.64.24610.3.64.246
5610.3.64.247/3210.3.64.247 – 10.3.64.24710.3.64.247
5710.3.64.248/3210.3.64.248 – 10.3.64.24810.3.64.248
5810.3.64.249/3210.3.64.249 – 10.3.64.24910.3.64.249
5910.3.64.250/3210.3.64.250 – 10.3.64.25010.3.64.250
6010.3.64.251/3210.3.64.251 – 10.3.64.25110.3.64.251
6110.3.64.252/3210.3.64.252 – 10.3.64.25210.3.64.252
6210.3.64.253/3210.3.64.253 – 10.3.64.25310.3.64.253
6310.3.64.254/3210.3.64.254 – 10.3.64.25410.3.64.254
6410.3.64.255/3210.3.64.255 – 10.3.64.25510.3.64.255
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 →