Area Code 640 – Krokom
The phone area code for Krokom is 640 (international format +46640). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 640
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Krokom
Geographic Coverage and Administrative Jurisdiction
The Swedish area code +46 640 is a geographic destination code assigned to the municipality of Krokom and its surrounding localities in Jämtland County (Jämtlands län), in the central-western part of Sweden. The code serves the administrative seat of Krokom, as well as smaller communities such as Änge, Dvärsätt, and Nälden. As part of the national numbering plan administered by the Swedish Post and Telecom Authority (PTS), this code routes calls to fixed-line subscribers within a defined exchange area, distinct from mobile and non-geographic services.
Dialing Formats and Caller Instructions
For domestic callers within Sweden, the trunk prefix 0 is dialed before the area code, followed by the subscriber number. The complete domestic format is 0640-XXXXX, where XXXXX represents the local subscriber number (typically 5 to 7 digits). For international callers, the country code +46 is used, and the leading trunk prefix is omitted. The international dialing format becomes +46 640 XXXXX. For example, to call a fixed line in Krokom from abroad, one would dial +46 640 12345 (replace 12345 with the actual number).
Overlay and Numbering Considerations
Currently, there is no overlay code for the 640 area; it remains the sole geographic code for this region. However, number portability allows subscribers to retain their 640 numbers when switching operators, which may result in calls being routed to a different physical location. Callers should be aware that the geographic association is not absolute after porting.
Caller Guidance
Local callers within the 640 area may be able to dial the subscriber number directly without the area code, depending on the specific local exchange configuration. However, for consistency and to avoid misdialing, it is recommended to always use the full national format (0640-XXXXX) when dialing from a different fixed-line zone or a mobile phone. Mobile callers within Sweden must always include the area code, as mobile networks do not interpret local numbers without the trunk prefix.
For businesses and residents in Krokom, ensuring that international contacts have the correct +46 640 format is essential for seamless connectivity. As Sweden continues to migrate toward IP-based telephony, the geographic significance of area codes remains for routing and emergency services, but VoIP services may allow subscribers to use the code from any location, subject to PTS regulations.