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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)10.167.75.224/27
network10.167.75.224/27
broadcast10.167.75.255
first host10.167.75.225
last host10.167.75.254
subnet mask255.255.255.224
wildcard0.0.0.31
addresses32
usable hosts30
classA
ipcalc 10.167.75.224/27
address00001010.10100111.01001011.11100000
subnet mask11111111.11111111.11111111.11100000
network00001010.10100111.01001011.11100000
broadcast00001010.10100111.01001011.11111111
green = network part, grey = host part
hex0x0aa74be0
decimal178736096
reverse dns224.75.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:4be0

/27 split into /32 · 32 subnets

close ×
#networkhost rangebroadcast
110.167.75.224/3210.167.75.224 – 10.167.75.22410.167.75.224
210.167.75.225/3210.167.75.225 – 10.167.75.22510.167.75.225
310.167.75.226/3210.167.75.226 – 10.167.75.22610.167.75.226
410.167.75.227/3210.167.75.227 – 10.167.75.22710.167.75.227
510.167.75.228/3210.167.75.228 – 10.167.75.22810.167.75.228
610.167.75.229/3210.167.75.229 – 10.167.75.22910.167.75.229
710.167.75.230/3210.167.75.230 – 10.167.75.23010.167.75.230
810.167.75.231/3210.167.75.231 – 10.167.75.23110.167.75.231
910.167.75.232/3210.167.75.232 – 10.167.75.23210.167.75.232
1010.167.75.233/3210.167.75.233 – 10.167.75.23310.167.75.233
1110.167.75.234/3210.167.75.234 – 10.167.75.23410.167.75.234
1210.167.75.235/3210.167.75.235 – 10.167.75.23510.167.75.235
1310.167.75.236/3210.167.75.236 – 10.167.75.23610.167.75.236
1410.167.75.237/3210.167.75.237 – 10.167.75.23710.167.75.237
1510.167.75.238/3210.167.75.238 – 10.167.75.23810.167.75.238
1610.167.75.239/3210.167.75.239 – 10.167.75.23910.167.75.239
1710.167.75.240/3210.167.75.240 – 10.167.75.24010.167.75.240
1810.167.75.241/3210.167.75.241 – 10.167.75.24110.167.75.241
1910.167.75.242/3210.167.75.242 – 10.167.75.24210.167.75.242
2010.167.75.243/3210.167.75.243 – 10.167.75.24310.167.75.243
2110.167.75.244/3210.167.75.244 – 10.167.75.24410.167.75.244
2210.167.75.245/3210.167.75.245 – 10.167.75.24510.167.75.245
2310.167.75.246/3210.167.75.246 – 10.167.75.24610.167.75.246
2410.167.75.247/3210.167.75.247 – 10.167.75.24710.167.75.247
2510.167.75.248/3210.167.75.248 – 10.167.75.24810.167.75.248
2610.167.75.249/3210.167.75.249 – 10.167.75.24910.167.75.249
2710.167.75.250/3210.167.75.250 – 10.167.75.25010.167.75.250
2810.167.75.251/3210.167.75.251 – 10.167.75.25110.167.75.251
2910.167.75.252/3210.167.75.252 – 10.167.75.25210.167.75.252
3010.167.75.253/3210.167.75.253 – 10.167.75.25310.167.75.253
3110.167.75.254/3210.167.75.254 – 10.167.75.25410.167.75.254
3210.167.75.255/3210.167.75.255 – 10.167.75.25510.167.75.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /27
/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-
/26255.255.255.1926462-
/27255.255.255.22432301
/28255.255.255.24016142 split →
/29255.255.255.248864 split →
/30255.255.255.252428 split →
/31255.255.255.2542216 split →
/32255.255.255.2551132 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 →