Area Code 17 – Golestan

Overview of Area Code 17 (Golestan Province, Iran)

Area code 17 is the geographic National Destination Code (NDC) assigned to the Golestan Province in the Islamic Republic of Iran, under the country's national numbering plan aligned with ITU-T E.164. This code is used for fixed-line (PSTN) services within the province, which is located in the northeastern part of the country, bordering Turkmenistan and the Caspian Sea. The province's administrative capital is Gorgan, and other significant cities served by this code include Gonbad-e Kavus, Bandar-e Torkaman, Aliabad-e Katul, and Kordkuy.

Dialing Formats and Usage

When dialing a fixed-line number within Golestan from another province in Iran, callers must use the trunk prefix '0' followed by the area code 17 and the subscriber number. The full national significant number (NSN) for a Golestan fixed line consists of the area code (17) plus a 7-digit subscriber number, resulting in a total of 9 digits after the trunk prefix '0'. For example, a local number in Gorgan might be formatted as 017-3XXX-XXX when dialed domestically from outside the province.

For international callers, the format is +98 17 3XXX-XXX, where +98 is the country calling code for Iran, and the leading '0' of the trunk prefix is omitted. It is crucial to note that the area code is an integral part of the number and must be dialed even when calling from a mobile phone within Iran, as the national numbering plan requires full NSN dialing for all fixed-line calls.

Geographic Coverage and Administrative Jurisdiction

Golestan Province was formed in 1997 from the eastern half of Mazandaran Province. The area code 17 is exclusively allocated to this province, and no overlay codes are currently in use. The province's telecommunications infrastructure is managed by the Telecommunication Company of Iran (TCI), which provides PSTN services. The region is characterized by a mix of urban and rural areas, with the majority of fixed-line subscribers concentrated in Gorgan and other county centers.

Caller Instructions

• Local callers within Golestan: For calls between different cities within the province, dial the full national number: 0 17 followed by the 7-digit subscriber number. For example, to call a number in Gonbad-e Kavus from Gorgan, dial 017-XXXX-XXX.
• Callers from other provinces in Iran: Dial 0 17 followed by the subscriber number. The same format applies regardless of the caller's location within Iran.
• International callers: Dial your country's international access code (e.g., 00 or +), then 98 (Iran's country code), then 17, followed by the 7-digit subscriber number. Omit the leading '0' of the area code.

Important Considerations

As of recent years, fixed-line penetration in Golestan has been supplemented by mobile and VoIP services, but the geographic code remains essential for routing calls to physical locations. When dialing from abroad, ensure you have the correct country code and omit any leading zeros. For businesses or individuals requiring a presence in Golestan, obtaining a local fixed-line number with area code 17 can enhance local credibility and reduce long-distance costs for customers within the province.