Area Code 38 – Zwolle
The phone area code for Zwolle is 38 (international format +3138). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 38
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Zwolle
Overview of Area Code 38 in the Netherlands
Area code 38 is a geographic National Destination Code (NDC) within the Netherlands' national numbering plan, conforming to ITU-T E.164 standards. It serves the city of Zwolle and its surrounding municipalities in the province of Overijssel. This code is assigned to fixed-line (PSTN) services, though it may also be used by VoIP providers for numbers associated with the region.
Geographic Coverage and Administrative Jurisdiction
The 38 area code covers Zwolle, the capital of Overijssel, and the nearby towns of Kampen, Steenwijk, Meppel, and Hardenberg. The region is a key economic and administrative hub in the eastern Netherlands, with a population of over 120,000 in Zwolle alone. The code is administered by the Authority for Consumers and Markets (ACM), which oversees the national numbering plan.
Dialing Formats
For local callers within the Netherlands, the number is dialed as 038-XXX XX XX (including the trunk prefix '0'). From abroad, callers must use the international format: +31 38 XXX XX XX (dropping the leading '0'). For example, a local number might be 038-123 45 67, which becomes +31 38 123 45 67 internationally.
Number Structure and Length
Numbers in this area code have a total length of 9 digits when dialed internationally (including the country code but excluding the leading '0'). The NDC '38' is followed by a 7-digit subscriber number. This structure is consistent with the Netherlands' closed numbering plan, where no additional area code is required for national calls.
Overlay and Number Portability
Currently, no overlay code has been introduced for the 38 area. However, number portability is fully implemented: subscribers can retain their 38 numbers when switching to other fixed-line or VoIP providers, even if the provider is based elsewhere. This means that a number with area code 38 may not always be physically located in Zwolle; it could be routed to a VoIP server anywhere.
Caller Instructions
For local callers in the Netherlands: dial 038 followed by the 7-digit subscriber number. For international callers: dial the international access prefix (e.g., 00 from most countries) then 31 (the Netherlands' country code), then 38, and the subscriber number. No additional digits are required. Calls to 38 numbers are typically charged at standard national fixed-line rates, depending on the caller's operator.
Business and Consumer Use
Area code 38 is widely used by local businesses, government offices, and residents. Many companies in Zwolle use 38 numbers to establish a local presence, and the code is also used by call centers and service providers that operate nationally but want a regional identity. For businesses, having a 38 number can enhance trust among local customers.