On Tue, Sep 14, 2010 at 6:51 PM, Steven Bellovin <s...@cs.columbia.edu> wrote:
> No, they bought AT&T, which [...]  But yes, SBC is the controlling piece of 
> the new AT&T.

>
> As for the two /8s -- not quite.  Back in the 1980s, AT&T got 12/8.  We soon 
> learned that we couldn't make good use of it, since multiple levels of 
> subnetting didn't exist.  We offered it back to Postel in exchange for 135/8 
> -- i.e., the equivalent in class B space -- but Postel said to keep 12/8 
> since no one else could use it, either.  This was all long before addresses 
> were tight.  When AT&T decided to go into the ISP business, circa 1995, 12/8 
> was still lying around, unused except for a security experiment I was 
> running.*    However, a good chunk of 135/8 went to Lucent (now 
> Alcatel-Lucent) in 1996, though I don't know how much.

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             Thanks;     Bill

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