[ACARS] Alpha numeric call signs[usa]

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Hi All

been watching some acars servers from the US

noted tonight

 ACARS mode: 2  Aircraft reg: N637AW  [A320-231]
 Message label: H1  Block id: 1  Msg no: D62C
 Flight id: HP654A  [unknown]  [America West Airlines]
 Message content:-
 #DFB1097,083,00,029,40,126,06991,N120/T2096,082,00,019,39,162,06975,
N128/V103D04,00208,00008,231,118,N176/V203D04,00208,0000C,246,119,
N254/V3012,005,154/V4002,002,194/X100377,0001,

 ----------------------------------------------------------[ 02/12/2004
19:36 ]-



Is this the start of the alpha numeric system
coming to the usa ???
as europe is full off them!!

cheers for now

Keith D.