updates servers list

Avast Free Antivirus / Premium Security
1

Hello!
I represent the company “Internet Censor” (http://icensor.ru)
Our company is engaged in the safe Internet.
We have developed the program which blocks access to dangerous sites.
Whether it is possible to lay out list IP of servers of updating avast for this purpose that we would include them in our white base.

Thanks.

artem [at] icensor.ru

2

The list is quite big (hundreds of servers) and may change during time.
The current state is always stored in the servers.def file inside of existing avast! installations.

3

Thanks.
How this list often varies?