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Class A subnetting Question

Posted on 2007-07-23
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Last Modified: 2012-08-14
We are currently using the address block of 10.16.48.0 /23 on our local network. Unfortunately for us we are now out of address and we need to re-subnet our network. Is it possible to use a new block starting at 10.16.46.1 /22? I used an online subnet calculator and it said that i had to start at 10.16.44.0 and end at 10.16.47.255 in order to use the 10.16.46.0 range. It would be best for me if i could use a new range that would encompass the 10.16.48.0 and 10.16.49.0 numbers as we have nearly 150 networked printers and numerous switches and servers.

Also, we can't use any IP's higher that 10.16.49.255 because we have an IP phone system that uses 10.16.50.1 and up.

Thanks
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Question by:governor_arnold
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Expert Comment

by:nate187
ID: 19551056
Yes, you can use 10.16.46.0/22  and it would give you usable addresses from 10.16.46.1 to 10.16.47.254


Or, if you want double that amount, use 10.16.40.0/21 with address from 10.16.40.1 to 10.16.47.254
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by:governor_arnold
ID: 19561162
Wouldn't using 10.16.46.0/22 give me usuable addresses through 10.16.49.254? I thought that the /22 would give 1024 addresses.
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Accepted Solution

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nate187 earned 1600 total points
ID: 19565038
You're right. I typed that too fast. 10.16.46.0/22 will give you addresses 10.16.46.1-10.16.49.255
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