how many BGP routers, how many ASes

Patrick W. Gilmore patrick at
Wed May 13 11:01:28 CDT 2009

On May 13, 2009, at 11:53 AM, Irfan Zakiuddin wrote:

> I have scouted around for this information, but not get very far.  I'm
> hoping someone will have answers at hand.

You obviously didn't look very hard.  The answer to the first question  
is posted to this very list every Friday:


The last two are probably not really knowable with any precision, but  
you might find some estimates.  Although I'm not really sure what  
utility the number is.


> What I want to know is roughly how many :
> 1.  ASes there are in the world today?
> 2.  BGP routers there are, for intra-domain as well as inter-domain  
> routing,
> in total in the world?
> 3.  BGP routers do the largest ASes have?
> Really interesting would then be to say either how fast the above  
> numbers
> are growing, or to give estimates for what the answers to 1-3 will  
> be in 5
> years time.
> An Internet source that provides the above information would be most  
> useful
> - though I can't seem to find it with google.
> I'd be grateful for answer to be sent to me directly, whether you  
> also post
> to NANOG is up to you.
> thanks in advance.
> irfan

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