Area Code 28 – Qazvin province

Overview of Area Code +98 28

Area code 28 is the National Destination Code (NDC) for the Qazvin Province in Iran, assigned under the international country calling code +98. This geographic code covers the provincial capital, Qazvin, and its surrounding districts, including Alborz, Abyek, Takestan, and Buin Zahra. The code is used for fixed-line (PSTN) services, and it is not associated with mobile or VoIP numbers, which have separate non-geographic prefixes.

Dialing Formats and Instructions

When calling a fixed-line number in Qazvin from abroad, you must dial the international prefix (e.g., 00 or +), followed by Iran's country code 98, then the area code 28 (without the leading zero), and finally the local subscriber number. For example, a local number such as 1234567 would be dialed as +98 28 1234567 from outside Iran.

Domestic callers within Iran must use the full trunk prefix 0 before the area code. Thus, to call Qazvin from Tehran, you would dial 028 1234567. When dialing within the same area code, the local number can often be dialed directly without the area code, but this depends on the specific local exchange and operator settings. It is always safe to include the area code.

Geographic Coverage and Administrative Significance

Qazvin Province is strategically located between Tehran and the Caspian Sea region, and its capital city, Qazvin, has been a historical hub along the Silk Road. The area code 28 is essential for businesses and residents in this region, supporting local enterprises, government offices, and residential lines. The province is known for its industrial zones, agricultural output, and historical sites, making reliable telecommunication services vital.

Overlay and Numbering Considerations

As of the latest ITU-T E.164 national numbering plan updates, there is no overlay code for Qazvin; the area code 28 remains the sole geographic code for the province. Subscriber numbers in this region typically consist of 7 digits, but the total length of a national significant number (NSN) is 10 digits (including the leading 0 for domestic dialing). For international callers, the NSN is 9 digits (excluding the leading 0).

For accurate billing and routing, always verify the number length and format with your service provider. When calling from a mobile phone, you may need to include the international access code depending on your carrier. For VoIP users, ensure that your service provider supports geographic numbering and that you have correctly entered the country code and area code.