Phone Numbers in Liechtenstein: A Technical Guide

Quick Reference

• Country: Liechtenstein
• Country Code: +423
• International Prefix: 00
• National Prefix: 0

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Overview

Discover the intricacies of Liechtenstein's telephone numbering plan. This guide covers the structure, dialing procedures, and technical considerations essential for telecom professionals, developers, and systems administrators working with Liechtenstein's phone numbers.

Number Formats

General Structure

Liechtenstein employs a closed numbering plan with a consistent length for both landline and mobile numbers, which are 7 digits long, excluding the country code (+423).

Number Structure Breakdown

Type	Format	Example
Landline	2XXXXXX	2345678
Mobile	6XXXXXX or 7XXXXXX	6512345, 7312345
Toll-Free	800XXXXX	80012345
Premium Rate	90XXXXXX	9012345

Regular Expressions

• Landline Numbers: ^2\d{6}$
• Mobile Numbers: ^[67]\d{6}$
• Toll-Free Numbers: ^800\d{5}$
• Premium Rate Numbers: ^90\d{5}$

Example Numbers

• Landline: +423 2345678
• Mobile: +423 6512345
• Toll-Free: +423 80012345
• Premium Rate: +423 9012345

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Dialing Procedures

Domestic Calls

• Landline to Landline: Dial the 7-digit number directly (e.g., 2345678).
• Landline to Mobile: Dial the 7-digit mobile number directly (e.g., 6512345).
• Mobile to Mobile: Dial the 7-digit mobile number directly (e.g., 7312345).

International Calls

• Outgoing: Dial the international prefix 00, followed by the country code, and then the local number. For example, to call Germany: 00 49 XXXXXXXXXX.
• Incoming: Dial the Liechtenstein country code +423, followed by the 7-digit local number (e.g., +423 2345678).

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Number Portability

Liechtenstein supports number portability, allowing users to keep their numbers when changing operators. This applies to both fixed-line and mobile numbers.

Telecom Operators and Number Ranges

The primary telecom operator in Liechtenstein is PostBus AG, offering services for both fixed-line and mobile numbers. Specific number ranges or prefixes for this operator are not publicly detailed.

Regulatory Body

The telecommunications sector in Liechtenstein is regulated by the Federal Office of Communications (BAKOM). For the most accurate and up-to-date information, visit their official website.

Technical Considerations

Number Allocation and Management

Number allocation in Liechtenstein is managed by BAKOM, ensuring efficient distribution in line with ITU-T E.164 recommendations.

Technical Restrictions

No specific technical restrictions, such as golden numbers or number blocking, are documented. Systems handling Liechtenstein phone numbers should adhere to the fixed 7-digit format and the country code +423.

ITU-T Standards

Liechtenstein's telephone numbering plan complies with the ITU-T E.164 standard, defining the format and structure for international telephone numbers.

Recent or Upcoming Changes

As of the latest updates, there are no recent or upcoming changes to the numbering plan in Liechtenstein. The numbering plan remains stable with no significant modifications in recent years.