What is the country code for Guernsey?

The country code for Guernsey is +44, which is shared with the United Kingdom. Guernsey's specific area code is 1481.

How are mobile numbers structured in Guernsey?

Mobile numbers in Guernsey typically start with +44 7XXX, where the first digit after the 7 indicates the mobile operator. The subscriber number is 6 digits long, making the full mobile number format +44 7XXX XXXXXX.

What are the dialing procedures for international calls to Guernsey?

To call a Guernsey landline from abroad, dial the international access code (e.g., 00), followed by the country code +44, then the area code 1481, and finally the 6-digit subscriber number. For mobile numbers, dial +44 7XXX followed by the 6-digit subscriber number.

Is number portability supported in Guernsey?

Yes, Guernsey supports number portability, allowing subscribers to retain their phone numbers when switching between service providers. This process is managed by the Office of the Telecommunications Adjudicator (OTA).

Which telecom operators are active in Guernsey, and what number ranges do they use?

The major telecom operators in Guernsey are Sure and JT Group. Sure uses the number range 01481 2XXXXX for landlines and 07781 XXXXXX for mobile numbers. JT Group uses 01481 7XXXXX for landlines and 07911 XXXXXX for mobile numbers.

What is the country code for Guernsey phone numbers?

The country code for Guernsey phone numbers is +44.

How do I dial a landline in Guernsey from abroad?

To dial a landline in Guernsey from abroad, you need to dial your international access code, followed by +44 1481, and then the 6-digit subscriber number.

What is the area code for Guernsey?

The area code for Guernsey is 1481.

What is the length of a typical subscriber number in Guernsey?

A typical subscriber number in Guernsey is 6 digits long.

Are Guernsey phone numbers part of the UK numbering plan?

Yes, Guernsey adheres to the UK's numbering plan but has some unique distinctions.

Can I keep my phone number if I switch providers in Guernsey?

Yes, Guernsey supports number portability, allowing you to retain your number when switching providers.

What is the format for Guernsey mobile numbers?

Guernsey mobile numbers are formatted as +44 7XXX XXXXXX.

Are there toll-free numbers in Guernsey?

Yes, Guernsey has toll-free numbers which are formatted as +44 800 XXXXXX.

Who regulates phone numbers in Guernsey?

The Office of the Telecommunications Adjudicator (OTA) regulates phone numbers in Guernsey.

What is the international prefix for dialing out of Guernsey?

The international prefix for dialing out of Guernsey is 00.

How do I call a mobile number in Guernsey from a landline within Guernsey?

To call a mobile number in Guernsey from a landline, simply dial the mobile number directly, e.g., 07781 123456.

What are premium rate numbers in Guernsey?

Premium rate numbers in Guernsey are often used for special services or information lines and are formatted as +44 9XX XXXXXX.

Does Guernsey have "golden numbers"?

Guernsey does not have a formal policy on "golden numbers," but such numbers may be reserved or auctioned by telecom operators.

What are the main telecom operators in Guernsey?

The main telecom operators in Guernsey are Sure and JT Group for landlines, and Sure Mobile and JT Mobile for mobile services.

How are phone numbers validated in Guernsey?

Phone numbers in Guernsey can be validated using regular expressions specific to each type of number, such as geographic, mobile, toll-free, and premium rate numbers.

Is there a national prefix for dialing within Guernsey?

Yes, the national prefix for dialing within Guernsey is 0.

How are international calls made from Guernsey?

To make an international call from Guernsey, dial 00, followed by the country code, area code (if applicable), and the subscriber number.

What is the ITU-T Recommendation E.164?

ITU-T Recommendation E.164 is a standard for international telephone numbering that ensures global interoperability of telephone numbers.

What should developers consider when handling Guernsey phone numbers?

Developers should consider validation using regular expressions, formatting in E.164 format, accounting for number portability, and implementing logic for internationalization.

Where can I find the most up-to-date information on Guernsey telecom regulations?

The most up-to-date information on Guernsey telecom regulations can be found on the official website of the Office of the Telecommunications Adjudicator (OTA).

Comprehensive Guide to Phone Numbers in Guernsey

Quick Reference

Country: Guernsey
Country Code: +44
International Prefix: 00
National Prefix: 0
Regulatory Authority: Office of the Telecommunications Adjudicator (OTA)

Overview

This guide offers an in-depth exploration of Guernsey's phone numbering system, detailing the structure, dialing procedures, and telecom regulations. It is an essential resource for telecom professionals, developers, and anyone needing comprehensive knowledge of Guernsey's telecom landscape.

Number Formats

Guernsey adheres to the UK's numbering plan with some unique distinctions. Below is a detailed breakdown of the number formats used in Guernsey:

General Number Structure

Country Code: +44
Area Code: 1481 (specific to Guernsey)
Subscriber Number Length: 6 digits

Number Structure Breakdown

Type	Format	Example Number	Description
Geographic	`+44 1481 XXXXXX`	+44 1481 257895	Fixed-line numbers, typically used for landlines within Guernsey.
Mobile	`+44 7XXX XXXXXX`	+44 7781 123456	Mobile numbers, usually starting with 77, 78, or 79.
Toll-Free	`+44 800 XXXXXX`	+44 800 123456	Toll-free numbers, free for the caller within the UK and Guernsey.
Premium Rate	`+44 9XX XXXXXX`	+44 900 123456	Premium rate services, often used for special services or information lines.

Regular Expressions for Number Validation

Geographic Numbers: ^$\+44\s?1481\s?\d{6}$$
Mobile Numbers: ^$\+44\s?7[7-9]\d{2}\s?\d{6}$$
Toll-Free Numbers: ^$\+44\s?800\s?\d{6}$$
Premium Rate Numbers: ^$\+44\s?9\d{2}\s?\d{6}$$

Dialing Procedures

Domestic Calls

Landline to Landline: Dial the full local number (e.g., 01481 257895).
Landline to Mobile: Dial the mobile number directly (e.g., 07781 123456).
Mobile to Mobile: Dial the mobile number directly (e.g., 07781 123456).

International Calls

Outgoing: Dial 00, followed by the country code, area code (if applicable), and the subscriber number. For example, to call the USA: 00 1 212 5551234.
Incoming: International callers should dial +44 1481 followed by the 6-digit subscriber number for landlines, or +44 7XXX followed by the 6-digit subscriber number for mobiles.

Number Portability

Guernsey supports number portability, allowing subscribers to retain their numbers when switching between service providers. This is managed by the Office of the Telecommunications Adjudicator (OTA).

Telecom Operators and Number Ranges

Operator	Number Range	Service Type
Sure	01481 2XXXXX	Landline
JT Group	01481 7XXXXX	Landline
Sure Mobile	07781 XXXXXX	Mobile
JT Mobile	07911 XXXXXX	Mobile

ITU-T Recommendations

Guernsey adheres to the ITU-T Recommendation E.164 for its numbering plan, ensuring global interoperability of its telephone numbers.

Number Allocation and Management

The numbering plan in Guernsey is managed by the Office of the Telecommunications Adjudicator (OTA). The OTA is responsible for the allocation, management, and regulation of telephone numbers within the jurisdiction.

Technical Restrictions and Special Cases

Golden Numbers

Guernsey does not have a formal policy on "golden numbers," which are numbers considered more desirable due to their memorable or aesthetically pleasing sequences. However, such numbers are sometimes reserved or auctioned by telecom operators.

Number Blocking

Guernsey's telecom operators may implement number blocking for specific services, such as premium-rate numbers, to protect consumers from fraud or excessive charges.

Technical Considerations for Developers

When handling Guernsey phone numbers in software systems:

Validation: Use the provided regular expressions to validate phone numbers accurately.
Formatting: Ensure numbers are stored in E.164 format (+44 1481 XXXXXX) to maintain consistency.
Portability: Account for number portability by not hardcoding operator-specific number ranges.
Internationalization: Implement logic to handle both local and international dialing formats.

For the most up-to-date information on telecommunications regulations in Guernsey, please consult the official website of the Office of the Telecommunications Adjudicator (OTA).

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