Area Code 43 – Zurich
The phone area code for Zurich is 43 (international format +4143). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 43
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Zurich
Geographic Overview
The Swiss area code +41 43 is a geographic National Destination Code (NDC) assigned to the canton of Zurich (Kanton Zürich) in Switzerland. It serves the city of Zurich and its surrounding metropolitan area, including districts such as Winterthur, Uster, Dübendorf, and Horgen. This code is part of the overlay plan implemented in 2003 to address numbering exhaustion in the region, operating alongside the older code +41 44. Both codes cover the same geographic area, meaning that local calls between +41 43 and +41 44 numbers are charged at local rates, and ten-digit dialing (including the leading '0') is mandatory for all calls within Switzerland.
Dialing Formats
For international callers, the correct format is +41 43 XXX XX XX (or +4143XXXXXXX when written without spaces). Within Switzerland, callers must dial 043 XXX XX XX, including the trunk prefix '0'. When placing a call from a foreign country, replace the leading '0' with the Swiss country code +41. For example, a Zurich number such as 043 123 45 67 becomes +41 43 123 45 67 from abroad.
Regulatory and Technical Notes
Numbering in Switzerland is regulated by the Federal Office of Communications (OFCOM). The +41 43 code is classified as a geographic number, meaning it is tied to a specific physical location, although with the rise of VoIP and fixed-mobile convergence, numbers may be used via IP-based services. However, the geographic designation still influences tariffing and emergency call routing. Subscribers can typically retain their numbers when moving within the same exchange area, but porting to a different geographic region may require a change of code.
Caller Instructions
For local callers within the Zurich area, dialing 043 XXX XX XX is sufficient. For callers from other Swiss cantons, the same format applies, as national trunk prefix '0' is always used. Foreign callers must use the international access prefix of their country (e.g., 00 from most European countries, 011 from the US/Canada) followed by 41 and then 43. It is important to note that Swiss numbers do not have a separate trunk prefix for international calls; the '0' is dropped after the +41.
Economic and Administrative Context
Zurich is Switzerland's largest city and a global financial hub, hosting numerous multinational corporations, banks, and insurance companies. The +41 43 code is widely used by businesses and residents alike, and due to the overlay, new number allocations may be assigned either +41 43 or +41 44. This dual-code system ensures sufficient numbering capacity for the region's continued growth.