National Numbering Plan in Turkey

Overview

The National Numbering Plan in Turkey is a system that governs the allocation and use of phone numbers within the country. It is based on the International Telecommunication Union (ITU) recommendations, specifically ITU-T E.164.

History

Prior to 1988, standard phone numbers in Turkey consisted of 10 digits. However, in 1988, the Post and Telegraph Administration (PTT) reorganized the system to a 12-digit format. This new system starts with "90", which is the international country code for Turkey, followed by three digits that indicate the domain name or region.

Number Format

The National Numbering Plan in Turkey uses a specific format for phone numbers:

* The first digit is always "9" (indicating the country code)
* The next two digits are the regional code
* The following seven digits are unique to each user or subscriber
* The last four digits are used for special services or extensions

Regional Codes and Domain Names

The three-digit domain name or region code in Turkey is used to identify the province or location of a fixed-line phone number. For example, GSM operators use numbers in the 5xx format, while the next seven digits are unique to each user.

Changes Over Time

In 1988, the National Numbering Plan was revised to include local phone numbers with seven digits. This change aimed to simplify and standardize phone numbering within Turkey.

List of Characters

The following table summarizes the characters used in the National Numbering Plan in Turkey:

| Character | Description |
| --- | --- |
| 0 (December) | Language code for Turkish |
| 2 | Language code for other languages supported by the system |
| 3 | Regional code |
| 5xx | GSM operator numbers |
| 7 | Local user number |

References

* Information Technologies and Communication Authority (BTHK)
* Post and Telegraph Administration (PTT)

Note: The original sources provided in Turkish and Urdu have been translated and adapted to create a cohesive English article.