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Understanding Cuba's Phone Number Formats and Dialing Rules

Quick Reference Guide

Overview

This comprehensive guide offers a detailed analysis of Cuba's telephone numbering system, including number formats, dialing procedures, and telecom regulations. It is an essential resource for telecom professionals, developers, and system administrators seeking precise information on Cuba's phone number structures and technical considerations.

Number Formats

General Number Structure

Cuba's telephone numbers follow a fixed-length format, which varies by service type (landline, mobile, toll-free). The standard format includes:

  • Country Code: +53
  • National Number: 6 to 8 digits
    • Area Code/Prefix: 1 to 2 digits (indicating region or service type)
    • Subscriber Number: 4 to 7 digits

Number Format Table by Type

TypeFormatExample Numbers
Landline[2-7]XXXXXXX72345678, 3123456
Mobile5XXXXXXX51234567
Toll-Free800XXXX8001234
Shared Cost807XXXX8074567
Premium Rate809XXXX8097890

Regular Expressions for Validation

For developers, use these regular expressions to validate Cuban phone numbers:

  • Landline: ^[2-7][0-9]{6,7}$
  • Mobile: ^5[0-9]{7}$
  • Toll-Free: ^800[0-9]{4}$
  • Shared Cost: ^807[0-9]{4}$
  • Premium Rate: ^809[0-9]{4}$

Dialing Procedures

Domestic Calls

Landline to Landline

  • Dial Format: 0 + [Area Code] + [Subscriber Number]
  • Example: To call a landline in Havana from another city: 0 7 2345678

Landline to Mobile

  • Dial Format: 0 + 5 + [Subscriber Number]
  • Example: To call a mobile number from a landline: 0 5 1234567

Mobile to Mobile

  • Dial Format: 5 + [Subscriber Number]
  • Example: To call another mobile number: 5 1234567

International Calls

Outgoing International Calls

  • Dial Format: 119 + [Country Code] + [National Number]
  • Example: To call the United States: 119 1 2123456789

Incoming International Calls

  • Dial Format: +53 + [Area Code/Prefix] + [Subscriber Number]
  • Example: To call a Cuban landline from abroad: +53 7 2345678

Number Allocation and Management

The Ministerio de Comunicaciones de Cuba oversees the allocation and management of telephone numbers, adhering to ITU-T Recommendations E.123 and E.164 for international compliance.

Major Telecom Operators

Cuba's telecom industry is state-controlled, with Etecsa (Empresa de Telecomunicaciones de Cuba S.A.) as the sole operator. Specific number ranges are not publicly disclosed.

Technical Considerations

Number Portability

Cuba currently does not support number portability for mobile or fixed-line numbers, meaning subscribers cannot retain their numbers when changing service providers.

ITU-T Standards

Cuba follows ITU-T Recommendations for numbering plans, including:

  • E.123: Notation for telephone numbers.
  • E.164: The international public telecommunication numbering plan.

Special Cases and Restrictions

  • Golden Numbers: No public information on golden numbers (e.g., numbers with repeating digits).
  • Number Blocking: Specific rules for number blocking are not publicly available.

Recent and Upcoming Changes

There have been no recent changes to Cuba's numbering plan, and no upcoming changes have been announced, ensuring stability in the system.

Emergency Numbers

Cuba uses a three-digit emergency number system:

  • Police: 106
  • Fire: 105
  • Ambulance: 104

For the latest telecommunications regulations in Cuba, visit the Ministerio de Comunicaciones de Cuba.

Conclusion

Cuba's telephone numbering plan is straightforward yet centralized, with standard formats for both landline and mobile numbers. Professionals should note the lack of number portability and centralized control of number ranges. Adhering to ITU-T standards ensures compatibility with international systems, facilitating the integration of Cuban numbers into global networks.

For further technical details or regulatory updates, always refer to official communications from the Ministerio de Comunicaciones de Cuba.