Re: How many ASs are out there?

Is there any way to trace which AS #'s are dormant, retired, no longer in use, etc.?

Or is this basically unknowable?

Unknowable. You might check ASN#.rdi.int for other published information, if any.

Bill Goldstein Senior Internet Specialist AT&T wgoldstein@att.com TEL:(412)642-7288