Area Code 11 – Norrköping

Overview of Area Code 11 (Norrköping)

Area code 11 is a geographic National Destination Code (NDC) assigned to the city of Norrköping and its surrounding municipalities in Östergötland County, Sweden. Under the ITU-T E.164 international numbering plan, the full country calling code for Sweden is +46, so numbers in this region are dialed internationally as +46 11 XXX XXX (or +4611XXXXXX when written without spaces). Domestically, callers within Sweden dial 011 XXX XXX (including the trunk prefix '0') to reach a subscriber in Norrköping.

Geographic Coverage and Jurisdiction

The 11 area code covers the Norrköping urban area and extends to neighboring localities such as Söderköping, Finspång, and Valdemarsvik. These areas fall under the administrative jurisdiction of Östergötland County. The code is used for fixed-line (PSTN) services, including traditional copper lines and fiber-based VoIP services that retain geographic numbering. It is not assigned to mobile networks; mobile numbers in Sweden begin with 7x prefixes (e.g., 70, 72, 73) and are non-geographic.

Dialing Formats and Instructions

• Local dialing (within Sweden): When calling a Norrköping number from another Swedish fixed or mobile line, you must dial the trunk prefix 0 followed by the area code and the subscriber number: 011-XXX XXX. The subscriber number length is typically 6 digits, making the total national significant number (NSN) 9 digits (including the leading 0).
• International dialing (from abroad): Callers outside Sweden should dial the international access prefix (e.g., 00 from most countries, or + on mobile), then Sweden's country code 46, followed by the area code without the leading '0', and the subscriber number: +46 11 XXX XXX.
• Example: A local number such as 011-12 34 56 would be dialed as +46 11 12 34 56 from overseas.

Overlay and Numbering Considerations

As of the latest ITU-T and Swedish Post and Telecom Authority (PTS) updates, there is no overlay code for the 11 area. The code remains exclusive to the Norrköping region. However, with the migration toward IP-based telephony, some subscribers may have numbers that are not physically located in the area, but the NDC still identifies the original geographic assignment. Callers should always verify the full number, as the area code is an essential part of the national dialing plan.

Practical Advice for Callers

For local callers within Norrköping, it is common to dial only the subscriber number for local calls if the network supports local dialing without the area code, but this is not universal. To avoid errors, always use the full national format (011-XXX XXX) or international format (+46 11 XXX XXX). Businesses in the region often list their numbers with the area code to ensure clarity for customers across Sweden and abroad.