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Community Member

Private IP address block

Hi experts,

I thought the private address block was as follows:

Class A: 10.0.0.0 - 10.255.255.255

Class B: 172.16.0.0 - 172.31.255.255

Class C: 192.168.0.0 - 192.168.255.255

Our call cerver/controller has an IP 169.76.x.x under Voice VLAN, while my Avaya IP phone has an IP 10.122.1.x;

I can't seem to figure out which Class our call server's IP address falls.

Any explainations will be much appreciated...

1 REPLY
Cisco Employee

Re: Private IP address block

That's a class B address.  Class B binary addresses start with 10, therefore the decimal number can be anywhere from 128 to 191 for the first octet.

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