Technical Guide to Phone Numbers in Greenland

Quick Reference

• Country: Greenland
• Country Code: +299
• International Prefix: 00
• National Prefix: None

Overview

Discover the intricacies of Greenland's telephone numbering plan, including number formats, dialing procedures, and regulatory guidelines. This guide is essential for telecom professionals, developers, and system administrators aiming to implement Greenlandic phone number structures effectively.

Number Structure

Greenland's phone numbers are straightforward, with no area or city codes, and consist of 6 digits following the country code +299.

General Number Format

• Format: +299 XX XXXX
• Length: 6 digits (excluding the country code)

Number Categories

Type	Prefix	Number Length	Example
Landline	[1-3]	6 digits	+299 12 3456
Mobile	[4-5]	6 digits	+299 45 6789
Toll-Free	80	6 digits	+299 80 1234
Premium	90	6 digits	+299 90 1234
Emergency	112, 113	3 digits	112

Regular Expressions for Number Validation

Use the following regular expressions to validate Greenland phone numbers:

• General Format: ^\(\+299\)[1-9]\d{5}$
• Landline: ^\(\+299\)[1-3]\d{5}$
• Mobile: ^\(\+299\)[4-5]\d{5}$
• Toll-Free: ^\(\+299\)80\d{4}$
• Premium: ^\(\+299\)90\d{4}$
• Emergency: ^112$|^113$

Dialing Procedures

Domestic Calls

In Greenland, simply dial the 6-digit subscriber number directly, as no national prefix is required.

• Landline to Landline: Dial the 6-digit number directly.
• Landline to Mobile: Dial the 6-digit number directly.
• Mobile to Mobile: Dial the 6-digit number directly.

International Calls

For international calls to or from Greenland, follow these steps:

• Outgoing International Calls: Dial 00 + destination country code + area code (if applicable) + local number.
• Incoming International Calls: Dial +299 followed by the 6-digit local number.

Number Portability

Currently, number portability, which allows users to retain their phone numbers when switching providers, is not available in Greenland.

Major Telecom Operators

The primary telecom operator in Greenland is TELE Greenland, responsible for number allocation and telecommunication services.

ITU-T Recommendations

Greenland follows the ITU-T Recommendation E.164, which standardizes international telephone numbering plans. The maximum length for Greenland's phone numbers, including the country code, is 9 digits.

Number Allocation and Management

The Greenlandic Telecommunication Authority oversees number allocation and management, ensuring compliance with the national numbering plan.

Technical Restrictions and Special Cases

• Golden Numbers: Greenland does not offer "golden numbers" or vanity numbers.
• Number Blocking: Certain number ranges may be reserved or blocked, though specifics are not publicly disclosed.

Technical Considerations for Developers

When working with Greenlandic phone numbers, consider the following:

1. Validation: Utilize the provided regular expressions for number validation.
2. Number Formatting: Always include the country code (+299) when storing or displaying numbers.
3. Dialing Logic: Ensure your system supports both domestic and international dialing formats.
4. Emergency Numbers: Implement special handling for emergency numbers like 112 and 113.

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References:

• Greenlandic Telecommunication Authority. National Numbering Plan.
• ITU-T Recommendation E.164. The international public telecommunication numbering plan.