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If, for example, the following is allocated to a VLAN, which individual IPs would become usable?

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Homework? Best grab yourself one of the numerous subnet calculators available on the Internet. – John Gardeniers Feb 16 '10 at 23:09

3 Answers 3

up vote 3 down vote accepted

use a mask calculator like (in french, but terms are same) There is too some CLI tools (something like ipcalc)

$ ipcalc
Address:       10101110.01111001.00011001.11010 000
Netmask: = 29 11111111.11111111.11111111.11111 000
Wildcard:              00000000.00000000.00000000.00000 111
Network:    10101110.01111001.00011001.11010 000
HostMin:       10101110.01111001.00011001.11010 001
HostMax:       10101110.01111001.00011001.11010 110
Broadcast:       10101110.01111001.00011001.11010 111
Hosts/Net: 6                     Class B
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Perfect! Thanks! – user29129 Feb 16 '10 at 22:19
Ugh... subnet calculators. – Evan Anderson Feb 16 '10 at 22:48

I'll give you the answer once, but if you are doing VLANing, you really should learn to do the math yourself. -

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First Usable IP Address = .....: Last Usable IP Address = ......:

Look up CIDR notation in case you want to learn more about expressing addesses like this

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