Austria (+43 / 0043): 10 to 13 digits
Locals write 0664 123456. An API wants +43664123456. Paste any Austria number below to see it normalised, validated, and identified.
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How Austria numbers are written
- Country calling code
- +43
- Dialled from abroad
- 0043 (011 43 from the US and Canada)
- ISO country code
- AT
- National number length
- 10 to 13 digits
- Trunk prefix
- 0 (dropped in E.164)
- Written locally
- 0664 123456
- E.164 format
- +43664123456
What +43 means
+43 is the country calling code for Austria. The same code is written 0043 when you dial out from most of Europe, Africa and Asia, and 011 43 from the US and Canada. All three reach the same place: only the exit code in front of it changes. Whichever one you use, the national trunk 0 is dropped once the country code is in front.
Mobile numbers
Mobile prefixes are 650 to 699, most commonly 664, 676 and 699.
Converting to E.164
Take the number as written locally (0664 123456), drop the leading 0, then prefix +43. The result is +43664123456: no spaces, no dashes, no parentheses. Store that, and format for display only when you show it to a human.
Why not do it with a regex
A pattern that matches Austria numbers today breaks the moment a new mobile range is allocated, and it cannot tell you whether the number is actually assigned. The tool above runs the same numbering-plan engine as our phone validation API, so it also reports line type and region rather than just shape.
Austria mobile prefixes
- 0650
- Mobile
- 0660
- Mobile
- 0664
- Mobile — the most common Austrian mobile range
- 0676
- Mobile
- 0680
- Mobile
- 0681
- Mobile
- 0688
- Mobile
- 0699
- Mobile
A prefix tells you the range a number was issued from, not which network holds it today — numbers move between operators. For the current carrier you need a live lookup, which is what our phone API returns.
Austria area codes by city
- Vienna
- 01
- Graz
- 0316
- Linz
- 0732
- Salzburg
- 0662
- Innsbruck
- 0512
- Klagenfurt
- 0463
Austrian numbers are not a fixed length
Most countries give you one length to validate against. Austria does not: the national number runs from 4 digits on a short Vienna landline to 13 on a mobile, and both are correct. A length check will reject real numbers here, which is why the tool above matches against the numbering plan instead of counting digits.
Austria phone numbers, answered
How many digits is an Austrian phone number?
There is no single answer, and that is the point: after the +43 country code an Austrian number is 4 to 13 digits. A Vienna landline can be very short; a 0664 mobile is usually 10 to 13. Validate against the numbering plan, not a digit count.
What is a 0664 number?
0664 is one of Austria's mobile ranges — the most widely used one. Written internationally it becomes +43 664 …: drop the leading 0, then add +43. The 0664 block tells you the number is mobile; it does not tell you which network holds it today, because Austrian numbers can be ported between operators.
How do I write an Austrian mobile number in international format?
Take the number as a local writes it — 0664 123456 — drop the leading 0, and put +43 in front: +43664123456. That is E.164: no spaces, no dashes, no brackets. Store that form and add spacing only when you show it to a person.
What is Austria's dialling code?
+43. From a country that uses 00 to dial out you would write 0043; from a mobile, +43 works everywhere. The 0 that Austrians write in front of the area code is a national trunk prefix and is always dropped in the international form.
That is how a Austria number is written. Whether a whole list is worth dialling is the free call list cleaner, or check one number on the spam phone checker.