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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)10.167.3.224/27
network10.167.3.224/27
broadcast10.167.3.255
first host10.167.3.225
last host10.167.3.254
subnet mask255.255.255.224
wildcard0.0.0.31
addresses32
usable hosts30
classA
ipcalc 10.167.3.224/27
address00001010.10100111.00000011.11100000
subnet mask11111111.11111111.11111111.11100000
network00001010.10100111.00000011.11100000
broadcast00001010.10100111.00000011.11111111
green = network part, grey = host part
hex0x0aa703e0
decimal178717664
reverse dns224.3.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:3e0

/27 split into /32 · 32 subnets

close ×
#networkhost rangebroadcast
110.167.3.224/3210.167.3.224 – 10.167.3.22410.167.3.224
210.167.3.225/3210.167.3.225 – 10.167.3.22510.167.3.225
310.167.3.226/3210.167.3.226 – 10.167.3.22610.167.3.226
410.167.3.227/3210.167.3.227 – 10.167.3.22710.167.3.227
510.167.3.228/3210.167.3.228 – 10.167.3.22810.167.3.228
610.167.3.229/3210.167.3.229 – 10.167.3.22910.167.3.229
710.167.3.230/3210.167.3.230 – 10.167.3.23010.167.3.230
810.167.3.231/3210.167.3.231 – 10.167.3.23110.167.3.231
910.167.3.232/3210.167.3.232 – 10.167.3.23210.167.3.232
1010.167.3.233/3210.167.3.233 – 10.167.3.23310.167.3.233
1110.167.3.234/3210.167.3.234 – 10.167.3.23410.167.3.234
1210.167.3.235/3210.167.3.235 – 10.167.3.23510.167.3.235
1310.167.3.236/3210.167.3.236 – 10.167.3.23610.167.3.236
1410.167.3.237/3210.167.3.237 – 10.167.3.23710.167.3.237
1510.167.3.238/3210.167.3.238 – 10.167.3.23810.167.3.238
1610.167.3.239/3210.167.3.239 – 10.167.3.23910.167.3.239
1710.167.3.240/3210.167.3.240 – 10.167.3.24010.167.3.240
1810.167.3.241/3210.167.3.241 – 10.167.3.24110.167.3.241
1910.167.3.242/3210.167.3.242 – 10.167.3.24210.167.3.242
2010.167.3.243/3210.167.3.243 – 10.167.3.24310.167.3.243
2110.167.3.244/3210.167.3.244 – 10.167.3.24410.167.3.244
2210.167.3.245/3210.167.3.245 – 10.167.3.24510.167.3.245
2310.167.3.246/3210.167.3.246 – 10.167.3.24610.167.3.246
2410.167.3.247/3210.167.3.247 – 10.167.3.24710.167.3.247
2510.167.3.248/3210.167.3.248 – 10.167.3.24810.167.3.248
2610.167.3.249/3210.167.3.249 – 10.167.3.24910.167.3.249
2710.167.3.250/3210.167.3.250 – 10.167.3.25010.167.3.250
2810.167.3.251/3210.167.3.251 – 10.167.3.25110.167.3.251
2910.167.3.252/3210.167.3.252 – 10.167.3.25210.167.3.252
3010.167.3.253/3210.167.3.253 – 10.167.3.25310.167.3.253
3110.167.3.254/3210.167.3.254 – 10.167.3.25410.167.3.254
3210.167.3.255/3210.167.3.255 – 10.167.3.25510.167.3.255
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 →