Area Code 664 – Mobile Network
The phone area code for Mobile Network is 664 (international format +43664). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 664
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Overview of Austria's +43 664 Mobile Prefix
The +43 664 prefix is a non-geographic mobile network code assigned to Austria's telecommunications landscape. Unlike geographic area codes that correspond to specific cities or regions, 664 is used exclusively for mobile services, enabling subscribers to make and receive calls anywhere within Austria and internationally. This prefix is operated by A1 Telekom Austria, one of the country's leading mobile network operators, and is widely recognized across the nation.
Technical Specifications and Numbering
Austrian mobile numbers using the 664 prefix follow the international E.164 format: +43 664 XXXXXXX, where 'XXXXXXX' represents a seven-digit subscriber number. When dialed domestically, the leading '0' is used: 0664 XXXXXXX. The total length of a complete international number is 12 digits, including the country code but excluding any trunk prefix. This structure is consistent with Austria's national numbering plan, which allocates mobile numbers in the range of 664 to various operators.
It is important to note that 664 is a non-geographic prefix, meaning it is not tied to any specific physical location. This allows users to retain their mobile numbers when moving within Austria, and it facilitates number portability between operators. When a subscriber switches providers, they may keep their 664 number, but the underlying network routing changes accordingly.
Dialing Instructions
- Domestic calls (within Austria): Dial 0664 followed by the seven-digit subscriber number. Example: 0664 1234567.
- International calls (from abroad): Dial your country's international access code (e.g., 00 or +), then 43 (Austria's country code), then 664, and finally the seven-digit subscriber number. Example: +43 664 1234567.
- International SMS and MMS: Use the same international format as voice calls: +43 664 1234567.
Regulatory and Operational Context
The 664 prefix is administered by the Austrian Regulatory Authority for Broadcasting and Telecommunications (RTR-GmbH), which oversees the allocation of numbering resources. A1 Telekom Austria, as the holder of this prefix, provides services to both postpaid and prepaid customers. The prefix supports standard GSM, UMTS, and LTE/5G services, ensuring compatibility with modern smartphones and IoT devices.
For businesses and individuals, 664 numbers are fully portable, meaning that switching to another operator does not require a change of number. This portability is a key feature of Austria's mobile market, promoting competition and consumer choice. Additionally, 664 numbers are widely used for two-factor authentication and mobile banking, given their reliability and national coverage.
When contacting an Austrian mobile user from abroad, it is essential to drop the leading '0' and use the full international format. Failure to do so may result in call routing errors. For local callers, the '0' is mandatory for domestic dialing.
In summary, the +43 664 prefix is a vital component of Austria's mobile communications infrastructure, offering reliable, portable, and non-geographic services to millions of users.