What is Austria 664 Area Code? Explanation and Dialing Guide

Understanding the Austria 664 Area Code

The Austria 664 area code is actually a mobile prefix, not a geographic landline area code like many people assume. So, if you spot a phone number in Austria that starts with 0664 or 664, it means you’re looking at a mobile phone number, not a traditional city or regional number. I remember being surprised by how these systems work—it’s not always what you expect!

Specifically, this prefix is assigned to Magenta Telekom, which is a major mobile carrier in Austria. In a way, the 664 code is a quick way to identify what company is behind a particular mobile number. Within Austria’s national numbering plan, certain mobile networks get their own three-digit prefixes, and 664 just happens to be one of the oldest and most recognized.

If you want to dive deeper into general country code and dialing info for Austria, the Austria country codes and dialing info guide is handy and explains the context even further.

How to Dial Austria 664 Mobile Numbers from Abroad

Let’s say you’ve got friends, family, or business contacts in Austria with a 664 mobile number. How should you go about calling them? International dialing feels intimidating, but it’s not too bad once you break it down:

• Start with your country’s international access code—for example, 011 if you’re calling from the United States.
• Then comes Austria’s country code, which is +43.
• Next, drop the leading zero from the 664 mobile prefix. So instead of dialing 0664, you’ll just use 664.
• And finally, tack on the rest of the mobile subscriber number.

Here’s a real-world example:
If the Austrian number is 0664 1234567, you’d dial: 011 43 664 1234567 (assuming you’re in the US). Simple as that. No need to worry about old country exit codes or anything complicated—just follow the format.

If you need more specifics about how the number format works or if you’re unsure about dialing Austria in general, the Calling Austria: Number format guide has you covered with more detailed tips.

Key Facts and Carrier Information for Austria 664 Area Code

Magenta Telekom (previously T-Mobile Austria) is the primary mobile carrier associated with the 664 prefix. So, when you see a 664 mobile number in Austria, there’s a good chance it was originally issued by Magenta. That said, with number portability these days, the original assignment doesn’t always mean the number still sits with that carrier, but it usually gives you a decent hint.

Another thing to note: The 664 area code is only for mobiles, not landlines. Austria’s cellular numbering system makes a clear distinction between mobile prefixes like 660, 664, 676, etc., and fixed-line (landline) area codes. So, you don’t need to wonder if you’re calling a house or a mobile—664 means mobile. And it’s part of Austria’s effort to keep numbering simple and consistent.

Hopefully that clears things up about the Austria 664 area code. If you ever see it pop up in your call history or have to dial it—now you know exactly what you’re dealing with!