Area Code 3399 – Outside Dakar
The phone area code for Outside Dakar is 3399 (international format +2213399). Browse local exchange codes (NXX) and carrier assignments below.
Geographic Scope and Administrative Coverage
The +221 3399 prefix is a geographic National Destination Code (NDC) assigned to the Thiès region of Senegal, located outside the capital Dakar. This area code covers the city of Thiès and its surrounding communes, including administrative and commercial districts. As a geographic code, it is tied to the PSTN (Public Switched Telephone Network) infrastructure of the region, serving both fixed-line residential and business subscribers.
Dialing Formats and Procedures
When calling a number with the 3399 prefix, the international format from abroad is +221 3399 XX XX XX, where the full national significant number (NSN) is 9 digits (3399 followed by 6 subscriber digits). Within Senegal, callers must dial the trunk prefix 0 before the NDC, resulting in 0 3399 XX XX XX. For example, a local call to a Thiès number would be dialed as 0 3399 12 34 56, while an international caller would dial +221 3399 12 34 56.
Overlay and Numbering Considerations
Currently, the 3399 prefix does not have an overlay code, meaning it serves a distinct geographic area without requiring 10-digit dialing for local calls. However, as Senegal’s telecommunications market evolves, the regulatory authority (ARTP) may introduce overlays or renumbering to address number exhaustion. Subscribers in the Thiès region should stay informed about any changes to local dialing procedures.
Caller Instructions
- Local callers (within Senegal): Dial the trunk prefix 0, followed by the NDC and subscriber number: 0 3399 XX XX XX.
- International callers: Dial the international access prefix (e.g., 00 from most countries), then Senegal’s country code +221, followed by the NDC and subscriber number: +221 3399 XX XX XX.
For example, to call a business in Thiès from the United States, you would dial 011 221 3399 XX XX XX. From a mobile phone in Europe, you would typically dial +221 3399 XX XX XX.
Service and Usage Context
Numbers under the 3399 prefix are primarily used for fixed-line telephony, including voice calls and legacy fax services. They are often associated with local government offices, businesses, and residential users. As VoIP and mobile services expand, some businesses may use geographic numbers for virtual presence, but the prefix remains fundamentally tied to the Thiès region.
For accurate billing and routing, always verify the complete number with the recipient, as misdialing the NDC can result in calls being routed to a different region.