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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)10.4.63.192/26
network10.4.63.192/26
broadcast10.4.63.255
first host10.4.63.193
last host10.4.63.254
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.4.63.192/26
address00001010.00000100.00111111.11000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000100.00111111.11000000
broadcast00001010.00000100.00111111.11111111
green = network part, grey = host part
hex0x0a043fc0
decimal168050624
reverse dns192.63.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:3fc0

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.63.192/3210.4.63.192 – 10.4.63.19210.4.63.192
210.4.63.193/3210.4.63.193 – 10.4.63.19310.4.63.193
310.4.63.194/3210.4.63.194 – 10.4.63.19410.4.63.194
410.4.63.195/3210.4.63.195 – 10.4.63.19510.4.63.195
510.4.63.196/3210.4.63.196 – 10.4.63.19610.4.63.196
610.4.63.197/3210.4.63.197 – 10.4.63.19710.4.63.197
710.4.63.198/3210.4.63.198 – 10.4.63.19810.4.63.198
810.4.63.199/3210.4.63.199 – 10.4.63.19910.4.63.199
910.4.63.200/3210.4.63.200 – 10.4.63.20010.4.63.200
1010.4.63.201/3210.4.63.201 – 10.4.63.20110.4.63.201
1110.4.63.202/3210.4.63.202 – 10.4.63.20210.4.63.202
1210.4.63.203/3210.4.63.203 – 10.4.63.20310.4.63.203
1310.4.63.204/3210.4.63.204 – 10.4.63.20410.4.63.204
1410.4.63.205/3210.4.63.205 – 10.4.63.20510.4.63.205
1510.4.63.206/3210.4.63.206 – 10.4.63.20610.4.63.206
1610.4.63.207/3210.4.63.207 – 10.4.63.20710.4.63.207
1710.4.63.208/3210.4.63.208 – 10.4.63.20810.4.63.208
1810.4.63.209/3210.4.63.209 – 10.4.63.20910.4.63.209
1910.4.63.210/3210.4.63.210 – 10.4.63.21010.4.63.210
2010.4.63.211/3210.4.63.211 – 10.4.63.21110.4.63.211
2110.4.63.212/3210.4.63.212 – 10.4.63.21210.4.63.212
2210.4.63.213/3210.4.63.213 – 10.4.63.21310.4.63.213
2310.4.63.214/3210.4.63.214 – 10.4.63.21410.4.63.214
2410.4.63.215/3210.4.63.215 – 10.4.63.21510.4.63.215
2510.4.63.216/3210.4.63.216 – 10.4.63.21610.4.63.216
2610.4.63.217/3210.4.63.217 – 10.4.63.21710.4.63.217
2710.4.63.218/3210.4.63.218 – 10.4.63.21810.4.63.218
2810.4.63.219/3210.4.63.219 – 10.4.63.21910.4.63.219
2910.4.63.220/3210.4.63.220 – 10.4.63.22010.4.63.220
3010.4.63.221/3210.4.63.221 – 10.4.63.22110.4.63.221
3110.4.63.222/3210.4.63.222 – 10.4.63.22210.4.63.222
3210.4.63.223/3210.4.63.223 – 10.4.63.22310.4.63.223
3310.4.63.224/3210.4.63.224 – 10.4.63.22410.4.63.224
3410.4.63.225/3210.4.63.225 – 10.4.63.22510.4.63.225
3510.4.63.226/3210.4.63.226 – 10.4.63.22610.4.63.226
3610.4.63.227/3210.4.63.227 – 10.4.63.22710.4.63.227
3710.4.63.228/3210.4.63.228 – 10.4.63.22810.4.63.228
3810.4.63.229/3210.4.63.229 – 10.4.63.22910.4.63.229
3910.4.63.230/3210.4.63.230 – 10.4.63.23010.4.63.230
4010.4.63.231/3210.4.63.231 – 10.4.63.23110.4.63.231
4110.4.63.232/3210.4.63.232 – 10.4.63.23210.4.63.232
4210.4.63.233/3210.4.63.233 – 10.4.63.23310.4.63.233
4310.4.63.234/3210.4.63.234 – 10.4.63.23410.4.63.234
4410.4.63.235/3210.4.63.235 – 10.4.63.23510.4.63.235
4510.4.63.236/3210.4.63.236 – 10.4.63.23610.4.63.236
4610.4.63.237/3210.4.63.237 – 10.4.63.23710.4.63.237
4710.4.63.238/3210.4.63.238 – 10.4.63.23810.4.63.238
4810.4.63.239/3210.4.63.239 – 10.4.63.23910.4.63.239
4910.4.63.240/3210.4.63.240 – 10.4.63.24010.4.63.240
5010.4.63.241/3210.4.63.241 – 10.4.63.24110.4.63.241
5110.4.63.242/3210.4.63.242 – 10.4.63.24210.4.63.242
5210.4.63.243/3210.4.63.243 – 10.4.63.24310.4.63.243
5310.4.63.244/3210.4.63.244 – 10.4.63.24410.4.63.244
5410.4.63.245/3210.4.63.245 – 10.4.63.24510.4.63.245
5510.4.63.246/3210.4.63.246 – 10.4.63.24610.4.63.246
5610.4.63.247/3210.4.63.247 – 10.4.63.24710.4.63.247
5710.4.63.248/3210.4.63.248 – 10.4.63.24810.4.63.248
5810.4.63.249/3210.4.63.249 – 10.4.63.24910.4.63.249
5910.4.63.250/3210.4.63.250 – 10.4.63.25010.4.63.250
6010.4.63.251/3210.4.63.251 – 10.4.63.25110.4.63.251
6110.4.63.252/3210.4.63.252 – 10.4.63.25210.4.63.252
6210.4.63.253/3210.4.63.253 – 10.4.63.25310.4.63.253
6310.4.63.254/3210.4.63.254 – 10.4.63.25410.4.63.254
6410.4.63.255/3210.4.63.255 – 10.4.63.25510.4.63.255
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 →