There is no evidence for thinking that the Zoroastrian message was meant for the Iranians alone. On the-contrary, history suggests that the exact opp… - Gherardo Gnoli

“With Varana and Ranha, as of course with Hapta Handu, which comes between them in the Vd. I list, we find ourselves straight away in Indian territory, or, at any rate, in territory that, from the very earliest times, was certainly deeply permeated by Indo-Aryans or Proto-Indoaryans.” ...

“in the denomination of Ariana, which became known to the Greeks after the Macedonian conquest of the eastern territories of the old Persian empire, there was obviously reflected a tradition that located the Aryan region in the central-southern part of eastern Iran, roughly from the Hindukus southwards, and that considered some of the Medes and the Persians in the west and some of the Bactrians and Sogdians in the north as further extensions of those people who were henceforth known by the name of Ariani. And this, to tell the truth, fits nicely into the picture we have been trying to piece so far. Here too, as in the passages of the Avesta we have studied from the Mihr Yast and the Zamyad Yast, the geographical horizon is central-eastern and southeastern; the northern lands are also completely peripheral, and Chorasmia, which is present only in the very peculiar position of which we have spoken in the Mihr Yast, is not included.” ...

The only possible identification of Airyana Vaejah must point to the great Hindukus mountain range.