Area Code 42 – Liège
The phone area code for Liège is 42 (international format +3242). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 42
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Liège
Geographic Overview
The +32 42 area code is a geographic National Destination Code (NDC) assigned to the Liège region in the French-speaking Wallonia region of Belgium. It serves the city of Liège and its surrounding municipalities, including Seraing, Herstal, Ans, and Saint-Nicolas. As a geographic code, it is tied to a specific administrative and telephony exchange area, historically associated with the former provincial capital of the Province of Liège.
Dialing Formats
When calling a fixed-line number in Liège from within Belgium, subscribers must dial the trunk prefix 0 followed by the area code and the subscriber number. The national format is:
- 0 42 XX XX XX (domestic call)
From outside Belgium, callers must use the international access code (typically 00 or +), followed by Belgium's country code 32, then the area code 42 without the leading trunk prefix, and finally the subscriber number. The international format is:
- +32 42 XX XX XX (international call)
It is important to note that the area code 42 is part of a larger numbering plan where the first digit after the country code indicates a geographic region. The full national significant number (NSN) for Liège fixed lines is 9 digits, including the leading 4 of the area code. For example, a typical Liège number might be +32 42 12 34 56.
Caller Instructions
Local callers within the Liège area may sometimes dial only the 7-digit subscriber number for local calls, depending on the specific exchange and carrier policies. However, for clarity and to avoid misdials, it is recommended to always use the full national format. Callers from other Belgian regions must dial 0 before the area code. International callers must replace the leading 0 with the country code +32 and omit the trunk prefix.
Overlay and Numbering Considerations
Belgium has not implemented overlay area codes for geographic numbers. Each geographic region retains a distinct area code, and number portability allows subscribers to retain their numbers when changing operators, but the geographic significance of the code remains. As of the latest ITU-T E.164 allocation, the 42 code is exclusively assigned to the Liège area, and no overlay is planned.
Usage and Services
Numbers under +32 42 are primarily used for fixed-line PSTN and VoIP services. They are commonly associated with residential, business, and government lines in the Liège metropolitan area. When calling these numbers, standard national and international tariff rates apply, depending on the caller's operator and subscription plan.