Area Code 2121 – Shirvan

Geographic Overview

The +994 2121 prefix is a geographic National Destination Code (NDC) assigned to the city of Shirvan, located in the central-eastern part of Azerbaijan. Shirvan is an administrative city with a population of approximately 80,000, situated on the Kura River. This code is used for fixed-line (PSTN) services within the city and its immediate surroundings. The numbering area is part of Azerbaijan's national numbering plan, which follows the ITU-T E.164 standard.

Dialing Formats

When calling a Shirvan landline from within Azerbaijan, you must dial the trunk prefix '0' followed by the area code and the subscriber number. The national format is: 0 2121 XXX XX (where X represents the 6-digit local subscriber number). For example, a local number might be dialed as 0 2121 45 67 89.

For international callers, the Azerbaijani country code (+994) replaces the trunk prefix. The international format is: +994 2121 XXX XX. For instance, calling from abroad, you would dial +994 2121 45 67 89.

Caller Instructions

• Local callers (within Shirvan): For calls to another fixed line in the same area, you may typically dial only the 6-digit subscriber number without the area code, depending on your operator's local dialing rules. However, to avoid confusion, it is recommended to use the full national format.
• National callers (outside Shirvan): Dial 0 2121 followed by the subscriber number.
• International callers: Dial your country's international access code (e.g., 00 or +), then 994 2121 and the subscriber number. Do not include the leading '0' of the national trunk prefix.

Overlay and Numbering Considerations

As of the latest ITU-T operational bulletin, there is no overlay code for the Shirvan area. The 2121 NDC is exclusively assigned to Shirvan. Subscriber numbers are 6 digits long, resulting in a total number length of 9 digits (including the NDC) when dialed nationally without the trunk prefix. The Azerbaijani numbering plan is closed, meaning the trunk prefix '0' is always used for national calls.

Technical Notes

Fixed-line services in Shirvan are provided by the national incumbent operator, Aztelecom, and alternative licensed operators. The network supports traditional PSTN services and has been upgraded to support digital switching and VoIP backhaul. Number portability is available for fixed-line services, allowing subscribers to retain their numbers when changing operators within the same geographic area.

For businesses, having a Shirvan geographic number establishes a local presence and can be used for voice and fax services. When integrating such numbers into IP-based systems, ensure proper E.164 formatting and compliance with Azerbaijani regulations.