Understanding Phone Numbers in Luxembourg

Quick Reference Guide

• Country: Luxembourg
• Country Code: +352
• International Prefix: 00
• National Prefix: None

Overview

This comprehensive guide delves into Luxembourg's telephone numbering system, covering number formats, dialing rules, and regulatory insights. Ideal for telecom professionals, developers, and systems administrators, it offers a clear understanding of Luxembourg's phone numbering intricacies.

Numbering Plan Structure

Luxembourg operates a closed numbering plan without a national prefix. Here's how phone numbers are structured:

General Number Structure

• Country Code: +352
• Area/City Codes: None (closed numbering plan)
• Subscriber Number Lengths: Varies by service type
• Special Prefixes:
  • Mobile Numbers: Start with 6
  • Toll-Free Numbers: Start with 800
  • Premium Rate Numbers: Start with 90

Detailed Number Formats

Regular Expressions for Number Validation

Use these regex patterns to validate Luxembourgish phone numbers:

# Geographic Numbers
^35[013-9]\d{4,8}$|^[2457-9]\d{2,9}$

# Landline Numbers
^2[2-9]\d{4,8}$|^3[0-46-9]\d{4,8}$

# Mobile Numbers
^6[269][18]\d{6}$|^7[189]\d{6}$

# Toll-Free Numbers
^800\d{5}$

# Premium Rate Numbers
^90[015]\d{5}$

# Shared Cost Numbers
^801\d{5}$

Dialing Procedures

Domestic Calls

• Landline to Landline: Dial the full number directly (e.g., 26791234).
• Landline to Mobile: Dial the full number directly (e.g., 621123456).
• Mobile to Mobile: Dial the full number directly (e.g., 691987654).

International Calls

• Outgoing: Dial 00 followed by the country code, then the subscriber number (e.g., 00 33 1 23456789 for France).
• Incoming: Callers from abroad should dial +352 followed by the subscriber number without any leading zero (e.g., +352 26791234).

Number Portability

Luxembourg supports number portability for both fixed-line and mobile numbers, allowing subscribers to retain their numbers when switching operators. This process is regulated by the Institut Luxembourgeois de Régulation (ILR).

Major Telecom Operators and Number Ranges

Regulatory and Management Information

Regulatory Body

The Institut Luxembourgeois de Régulation (ILR) is responsible for managing and regulating the telephone numbering plan in Luxembourg.

Number Allocation and Management

Numbers in Luxembourg are allocated based on service type and managed by the ILR. The ILR ensures that the numbering plan adheres to ITU-T recommendations and meets the needs of the telecommunications market.

ITU-T Recommendations

Luxembourg follows ITU-T E.164 guidelines for international numbering and dialing procedures. The ILR aligns its national numbering plan with these international standards to ensure global interoperability.

Technical Considerations

For Developers and Systems Administrators

• Validation: Use the provided regular expressions to validate Luxembourgish numbers in your applications.
• Number Formatting: Ensure that international numbers are formatted with the +352 country code, and domestic numbers are formatted according to their service type.
• Portability Handling: Implement number portability checks if your system interacts with Luxembourgish telecom networks.

Special Cases

• Golden Numbers: While not explicitly mentioned, golden numbers (e.g., easily memorable numbers) may be subject to special allocation rules.
• Number Blocking: Ensure compliance with local regulations regarding number blocking, especially for premium rate and toll-free services.