Hello Markus,   
      
   On Monday July 30 2018 18:11, you wrote to me:   
      
    MvdV>> What I find remarkable is that T-Mobile US is working towards   
    MvdV>> an IPv6 only mobile network by switching off IPv4 and   
    MvdV>> accomodating "legacy" with transition mechanisms. While here in   
    MvdV>> my part of the world they are still IPv4 only. Even their   
    MvdV>> website is IPv4...   
      
    MR> I assume they didn't get sufficient IPv4 address space from ARIN for   
    MR> the US market. So they were forced to go for IPv6.   
      
   Arin depleted ger IPv4 stock in Sept 2015, so it is a reasonable assumption   
   that T-mobile US can't get ant more IPv4 address space. But the the same would   
   apply to RIPE and the European obile providers. Ripe exhausted her IPv4 space   
   Sept 2012. But here (Netherlands) none of the mobile providers offer IPv6 yet.   
   They offer IPv4 CGNAT though... :-(   
      
      
   Cheers, Michiel   
      
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