The Global Standard
Posted: Sun May 25, 2025 8:57 am
In a "phone number breakdown," the subscriber line number is the final, precise address, ensuring that the call reaches the exact individual or device intended, completing the journey across the global telecommunications network.
A "phone number breakdown" would be incomplete without delving into the underlying Numbering Plans that govern the allocation and structure of these digits worldwide. These plans are standa morocco phone number list rdized frameworks that ensure unique identification for every telecommunications endpoint, enabling seamless global connectivity. The most prominent international standard is E.164, but national plans adapt it to their specific needs.
ITU-T E.164 Recommendation:
Purpose: Developed by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T), E.164 defines the format of telephone numbers for international public telecommunication networks. Its primary goal is to ensure that every phone in the world has a globally unique address.
Structure: E.164 numbers are designed to include all the information necessary to route a call to a specific phone. The maximum length is 15 digits (excluding international access codes like "00" or "011"). The general structure is:
Country Code (CC): 1 to 3 digits (e.g., 1 for NANP, 44 for UK, 880 for Bangladesh).
National Destination Code (NDC): Identifies a specific area, city, or network within a country. Its length varies by country.
Subscriber Number (SN): The unique identifier for the individual line or service.
Example (E.164 format): +CC NDC SN (The "+" indicates the international dialing prefix should be used).
National Numbering Plans (NNPs):
While E.164 provides the international framework, each country develops its own National Numbering Plan (NNP) that fits within this structure. NNPs define how numbers are organized domestically, including:
Length of local numbers: How many digits after the country code.
A "phone number breakdown" would be incomplete without delving into the underlying Numbering Plans that govern the allocation and structure of these digits worldwide. These plans are standa morocco phone number list rdized frameworks that ensure unique identification for every telecommunications endpoint, enabling seamless global connectivity. The most prominent international standard is E.164, but national plans adapt it to their specific needs.
ITU-T E.164 Recommendation:
Purpose: Developed by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T), E.164 defines the format of telephone numbers for international public telecommunication networks. Its primary goal is to ensure that every phone in the world has a globally unique address.
Structure: E.164 numbers are designed to include all the information necessary to route a call to a specific phone. The maximum length is 15 digits (excluding international access codes like "00" or "011"). The general structure is:
Country Code (CC): 1 to 3 digits (e.g., 1 for NANP, 44 for UK, 880 for Bangladesh).
National Destination Code (NDC): Identifies a specific area, city, or network within a country. Its length varies by country.
Subscriber Number (SN): The unique identifier for the individual line or service.
Example (E.164 format): +CC NDC SN (The "+" indicates the international dialing prefix should be used).
National Numbering Plans (NNPs):
While E.164 provides the international framework, each country develops its own National Numbering Plan (NNP) that fits within this structure. NNPs define how numbers are organized domestically, including:
Length of local numbers: How many digits after the country code.