The country code for Cuba is +53. This code is required when dialing Cuban phone numbers from international locations. It precedes the area code and subscriber number.

To dial a Cuban landline from another country, use the format +53 [Area Code] [Subscriber Number]. For example, +53 7 2345678 would connect you to a Havana landline. Remember to replace the bracketed information with the specific area code and number you wish to dial. The +53 is the country code for Cuba.

For domestic calls within Cuba from a landline, dial 0 [Area Code] [Subscriber Number]. The '0' is the national prefix, followed by the area code and local number. For instance, dialing 0 7 2345678 connects you to a Havana number from another Cuban city.

Cuban mobile numbers follow the format 5XXXXXXX, consisting of eight digits starting with 5. For example, 51234567 is a valid mobile number. This format is consistent across all mobile carriers in Cuba.

Dial 0 5 [Subscriber Number] to call a Cuban mobile phone from a landline within Cuba. The zero is the national prefix, followed by '5' designating a mobile number, and finally, the seven-digit subscriber number.

To call another mobile phone within Cuba, simply dial 5 followed by the seven-digit subscriber number. No area codes or prefixes are needed for mobile-to-mobile calls within the country.

Cuba's international prefix is 119. This prefix is used when making international calls from a Cuban phone line. Dial 119 followed by the country code and the national number you are trying to reach.

Etecsa (Empresa de Telecomunicaciones de Cuba S.A.) is the sole telecommunications operator in Cuba. As a state-controlled company, Etecsa manages all aspects of the telecom industry, including number allocation and infrastructure.

No, Cuba currently does not support number portability. This means that subscribers cannot keep their existing phone numbers if they switch service providers. This applies to both landline and mobile numbers.

Cuba uses a three-digit emergency number system: 106 for Police, 105 for Fire, and 104 for Ambulance. These numbers can be dialed from any phone within Cuba to reach the respective emergency services.

Cuba adheres to ITU-T Recommendations E.123 and E.164. E.123 defines the notation for national and international telephone numbers, and E.164 outlines the international public telecommunication numbering plan, ensuring global compatibility.

For the most current regulations and updates on Cuban telecommunications, refer to the official website of the Ministerio de Comunicaciones de Cuba (http://www.mincom.gob.cu). This is the regulatory authority for telecommunications in Cuba.

The regular expression ^[2-7][0-9]{6,7}$ can be used to validate Cuban landline numbers. This expression ensures the number begins with a digit from 2 to 7 and is followed by six or seven more digits.

Use the regular expression ^5[0-9]{7}$ to validate Cuban mobile phone numbers. This checks for the '5' prefix followed by exactly seven digits, ensuring the number conforms to the standard format.