IDN hž.com & hž.net

What language?

Punycode?

Languages? This is from Wikipedia - below

Slavic languages
It is the 42nd letter of the Czech, the 46th letter of Slovak, the 25th letter of the Slovenian alphabet, the 30th letter of the Croatian, Bosnian, Serbian, Montenegrin scripts. It is also used in both Sorbian languages and Belarusian latin alphabet.
In addition, the character is typically used as a transliteration of Cyrillic Ж in Macedonian (in 8th position), occasionally in Russian, Ukrainian, and Belarusian and even less frequently in Bulgarian.
For most languages it represents voiced postalveolar fricative /ʒ/ except in Russian transliterations of Ж where it represents voiced retroflex fricative /ʐ/.

Baltic languages
It is the 32nd letter of the Lithuanian and 33rd letter of the Latvian alphabets.

Uralic languages
It is the 20th letter of the Estonian alphabet, where it is used in loan words, and the 29th letter of the Northern Sami alphabet. It also features occasionally in Finnish but is not part of the regular alphabet and only regarded as a variant of Z.
In Finnish, the letter ž is only used in loan words, džonkki and maharadža, and in Romanization of Russian and other non-Latin alphabets. In Finnish and Estonian, it is possible to replace ž with zh but only when it is technically impossible to typeset the accented character.[1]

Other languages
It is the 13th letter of the Turkmen and Laz alphabets. In Turkmen it is pronounced [ʒ].
It is the 27th and last letter of the Songhay alphabet.
It is used in Persian Latin alphabet, equivalent to ژ.
It is also used in the standard orthography of the Lakota language.

hž - but what language is it?

And what is the Punycode?

---------- Post added at 11:43 AM ---------- Previous post was at 11:38 AM ----------

Probably Croatian related to railways?

well it's just an abbreviation H for Hrvatske (Croatia) and Z for zeljeznice (railways) Punycode is xn--h-toa. isn't it visible in the address bar?