Area Code 21 – Aleppo

Geographic Coverage and Administrative Jurisdiction

The +963 21 country-code prefix is the National Destination Code (NDC) for the Aleppo Governorate in the Syrian Arab Republic. This geographic area code covers the city of Aleppo, the largest urban center in Syria, as well as its surrounding administrative districts and suburbs. The region is a major economic and industrial hub, historically serving as a crossroads for trade and commerce. The area code 21 is allocated to fixed-line PSTN (Public Switched Telephone Network) services within this jurisdiction, including traditional copper-line connections and, increasingly, fiber-optic and VoIP-based fixed lines that retain geographic numbering.

Dialing Formats and Caller Instructions

When calling a fixed line in Aleppo from within Syria, subscribers must dial the trunk prefix 0 followed by the area code and the subscriber's seven-digit local number. The national dialing format is therefore 0 21 XXX XXXX. For example, a local number might be dialed as 021 234 5678.

For international callers, the Syrian country code +963 is used, followed by the area code 21 (without the leading zero) and the seven-digit local number. The international format is +963 21 XXX XXXX. For instance, an international caller would dial +963 21 234 5678 to reach the same subscriber.

It is important to note that the leading '0' used in national dialing is a trunk prefix and is not part of the country code or the NDC. When dialing from abroad, callers must omit this leading zero.

Overlay and Numbering Considerations

As of the latest ITU-T E.164 national numbering plan updates, the Aleppo area code 21 does not have an overlay code. Subscribers within the Aleppo region use the 21 NDC exclusively for fixed-line services. The Syrian Telecommunications Establishment (STE) is the regulatory authority responsible for assigning and managing these numbers. Number portability is not widely implemented for fixed lines in Syria, meaning that if a subscriber moves to a different geographic area, they typically must obtain a new number with the corresponding area code.

Practical Guidance for Callers

For local callers within Aleppo, it is possible to dial the seven-digit subscriber number directly without the area code in some cases, depending on the local exchange configuration. However, for clarity and reliability, it is recommended to always use the full national format 021 XXX XXXX when dialing from a mobile phone or from outside the immediate local calling area. For international callers, ensure that you have the correct country code (+963) and drop the trunk prefix '0' before the area code.