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)10.89.89.0/24
network10.89.89.0/24
broadcast10.89.89.255
first host10.89.89.1
last host10.89.89.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.89.89.0/24
address00001010.01011001.01011001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01011001.01011001.00000000
broadcast00001010.01011001.01011001.11111111
green = network part, grey = host part
hex0x0a595900
decimal173627648
reverse dns0.89.89.10.in-addr.arpa
ipv4-mapped::ffff:a59:5900

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.89.89.0/3210.89.89.0 – 10.89.89.010.89.89.0
210.89.89.1/3210.89.89.1 – 10.89.89.110.89.89.1
310.89.89.2/3210.89.89.2 – 10.89.89.210.89.89.2
410.89.89.3/3210.89.89.3 – 10.89.89.310.89.89.3
510.89.89.4/3210.89.89.4 – 10.89.89.410.89.89.4
610.89.89.5/3210.89.89.5 – 10.89.89.510.89.89.5
710.89.89.6/3210.89.89.6 – 10.89.89.610.89.89.6
810.89.89.7/3210.89.89.7 – 10.89.89.710.89.89.7
910.89.89.8/3210.89.89.8 – 10.89.89.810.89.89.8
1010.89.89.9/3210.89.89.9 – 10.89.89.910.89.89.9
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2010.89.89.19/3210.89.89.19 – 10.89.89.1910.89.89.19
2110.89.89.20/3210.89.89.20 – 10.89.89.2010.89.89.20
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22910.89.89.228/3210.89.89.228 – 10.89.89.22810.89.89.228
23010.89.89.229/3210.89.89.229 – 10.89.89.22910.89.89.229
23110.89.89.230/3210.89.89.230 – 10.89.89.23010.89.89.230
23210.89.89.231/3210.89.89.231 – 10.89.89.23110.89.89.231
23310.89.89.232/3210.89.89.232 – 10.89.89.23210.89.89.232
23410.89.89.233/3210.89.89.233 – 10.89.89.23310.89.89.233
23510.89.89.234/3210.89.89.234 – 10.89.89.23410.89.89.234
23610.89.89.235/3210.89.89.235 – 10.89.89.23510.89.89.235
23710.89.89.236/3210.89.89.236 – 10.89.89.23610.89.89.236
23810.89.89.237/3210.89.89.237 – 10.89.89.23710.89.89.237
23910.89.89.238/3210.89.89.238 – 10.89.89.23810.89.89.238
24010.89.89.239/3210.89.89.239 – 10.89.89.23910.89.89.239
24110.89.89.240/3210.89.89.240 – 10.89.89.24010.89.89.240
24210.89.89.241/3210.89.89.241 – 10.89.89.24110.89.89.241
24310.89.89.242/3210.89.89.242 – 10.89.89.24210.89.89.242
24410.89.89.243/3210.89.89.243 – 10.89.89.24310.89.89.243
24510.89.89.244/3210.89.89.244 – 10.89.89.24410.89.89.244
24610.89.89.245/3210.89.89.245 – 10.89.89.24510.89.89.245
24710.89.89.246/3210.89.89.246 – 10.89.89.24610.89.89.246
24810.89.89.247/3210.89.89.247 – 10.89.89.24710.89.89.247
24910.89.89.248/3210.89.89.248 – 10.89.89.24810.89.89.248
25010.89.89.249/3210.89.89.249 – 10.89.89.24910.89.89.249
25110.89.89.250/3210.89.89.250 – 10.89.89.25010.89.89.250
25210.89.89.251/3210.89.89.251 – 10.89.89.25110.89.89.251
25310.89.89.252/3210.89.89.252 – 10.89.89.25210.89.89.252
25410.89.89.253/3210.89.89.253 – 10.89.89.25310.89.89.253
25510.89.89.254/3210.89.89.254 – 10.89.89.25410.89.89.254
25610.89.89.255/3210.89.89.255 – 10.89.89.25510.89.89.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /24
/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-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →