Belgium phone numbers follow a closed numbering plan with fixed-length area codes and subscriber numbers. Landlines follow the format 0XX XXX XXX or 0X XXX XXX, while mobile numbers use 04XX XXX XXX. Toll-free, premium rate and shared cost numbers have their own prefixes, 0800, 090X and 078 respectively, followed by specific lengths.

To dial a Belgium mobile number internationally, dial the country code +32, followed by the mobile number without the leading 0. For example, if the mobile number is 0478 123 456, you would dial +32 478 123 456. This format adheres to the ITU's E.164 standard for global interoperability.

You can validate Belgian phone numbers using regular expressions tailored for each number type: landlines (^0[1-9]{1,2}[0-9]{6}$), mobiles (^04[5-9][0-9]{6}$), toll-free (^0800[0-9]{4}$), premium rate (^090[0-9][0-9]{4}$), and shared cost (^078[0-9]{4}$). This ensures data integrity and accuracy.

The primary number range 047X in Belgium is used by Proximus, a major telecom operator in Belgium. Other number ranges used by Proximus include 048X for mobile numbers, 02X, and 03X for landlines. Remember number portability may allow other operators to service these ranges.

Belgium follows the ITU-T E.164 standard to ensure international compatibility. This standard defines the structure for international telephone numbers allowing for global recognition and seamless interconnection between different telecommunication systems.

The Belgian Institute for Postal Services and Telecommunications (BIPT) is the regulatory body responsible for allocating and managing telephone numbers in Belgium. The BIPT ensures compliance with international standards and manages number portability.

The country code for Belgium is +32. When dialing Belgium from another country, you'll need to prefix the number with +32, followed by the area code (without the leading '0') and the subscriber number.

For domestic calls within Belgium from a landline, dial the national prefix '0' followed by the area code and subscriber number. For calls from mobile to mobile or landline to mobile, use the same format, including the '0' prefix before area and mobile codes (e.g., 04XX XXX XXX).

The leading zero should be removed from the Belgian area code only when dialing from another country. When making international calls to Belgium, dial +32 followed by the area code without the zero and then the subscriber number.

Yes, number portability is available in Belgium for both fixed-line and mobile numbers. This allows users to retain their existing phone numbers when changing service providers, a system managed by the BIPT since 2006.

The national prefix used when dialing within Belgium is '0'. This prefix is used for both landline-to-landline and landline-to-mobile calls, followed by the area code and subscriber number.