Area Code 43 – Paraná
The phone area code for Paraná is 43 (international format +5543). 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 Paraná
Geographic Coverage and Administrative Jurisdiction
Area code 43 is a geographic National Destination Code (NDC) assigned to the northern region of the state of Paraná, Brazil. It covers the metropolitan area of Londrina, the state's second-largest city, along with more than 100 municipalities in the region. Key cities served include Londrina, Apucarana, Arapongas, Cambé, Rolândia, Ibiporã, Jataizinho, and Telêmaco Borba. The code is administered by the National Telecommunications Agency (ANATEL) and is used for fixed-line (PSTN) services, though many numbers are also reachable via VoIP providers.
Dialing Formats and Caller Instructions
For local calls within the same area code, Brazilian users dial only the eight-digit subscriber number (e.g., 3333-4444). For long-distance calls from other Brazilian area codes, the complete format is: 0 + carrier code + 43 + subscriber number. For example, to call a Londrina landline from São Paulo (11), you would dial 0 15 43 3333-4444 (where 15 is a sample carrier code). International callers must use the country code +55, followed by the area code and subscriber number, without the trunk prefix '0'. Thus, a call from the United States would be dialed as +55 43 3333-4444.
Numbering Structure and Overlay Considerations
Subscriber numbers within area code 43 are eight digits long, with the first digit typically ranging from 2 to 9. The region does not currently have an overlay code; however, ANATEL has implemented a national plan to unify fixed and mobile numbering, but geographic codes remain distinct. As of 2025, no overlay is planned for 43, but users should always confirm the area code when dialing from mobile phones, as mobile numbers in the same region use the same area code but have a '9' prefix (e.g., +55 43 9 9123-4567).
Regulatory and Technical Notes
Area code 43 is part of the Brazilian Geographic Numbering Plan, which follows ITU-T E.164 recommendations. Calls to 43 numbers are tariffed as domestic long-distance when originating from other area codes, and local when within the same code. Since 2015, ANATEL has allowed number portability, enabling subscribers to retain their numbers when changing operators, but the geographic code remains tied to the original location. For businesses, using a local presence number in 43 can enhance customer trust and local SEO, as it signals a physical presence in northern Paraná.