[ppml] Soliciting comments: IPv4 to IPv6 fast migration

[Keith W. Hare]

> -----Original Message-----
> From: ppml-bounces at arin.net [mailto:ppml-bounces at arin.net] On 
> Behalf Of michael.dillon at bt.com
> Sent: Friday, July 27, 2007 4:14 AM
> To: ppml at arin.net
> Subject: Re: [ppml] Soliciting comments: IPv4 to IPv6 fast migration
> 
> ...
> 
> NANPA had *RESERVED* NNX codes of the form n0n so that switches could
> distinguish NPA's from NNX's in the first 3 digits dialed. I don't
> believe that NANPA ever mandated any technology change. The switching
> technology was already in place long before 10-digit dialing was
> introduced anywhere.
> 
> But that is not all that NANPA did. They also moved to allocating
> smaller blocks and I believe there were changes to reporting. In any
> case, there is far more detailled phone number usage reporting than we
> have in ARIN. And there are more strict rules on things like how long
> you can leave a number unused before assigning it to another customer.
> 

With some amount of push from customers and lawmakers, the telephone
companies have moved from Provider Agregatable phone numbers to Provider
Independent phone numbers.

Keith