Area Code 3 – Christchurch & South Island
The phone area code for Christchurch & South Island is 3 (international format +64 3). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 3
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Overview of New Zealand Area Code 3
Area code 3 is the National Destination Code (NDC) for the South Island of New Zealand, with its primary hub in Christchurch, the country's second-largest city. This geographic code covers a vast region, including the Canterbury Plains, the West Coast, Otago, Southland, and the top of the South Island (Nelson, Marlborough, and Tasman). Major cities and towns served include Dunedin, Nelson, Queenstown, Invercargill, Timaru, and Greymouth.
Dialing Formats and Usage
Within New Zealand, the code is dialed as 03 followed by a seven-digit subscriber number, making the total national significant number (NSN) length 10 digits (including the leading 0). For example, a local Christchurch number might be 03 345 6789. When calling from overseas, the leading zero is dropped, and the country code +64 is used, resulting in +64 3 345 6789. It is important to note that the area code is an integral part of the number and must be dialed even for local calls, as New Zealand does not use trunk prefixes or allow local number dialing without the area code in most cases.
Geographic Coverage and Administration
The code is administered by the Commerce Commission of New Zealand, which oversees the allocation of numbering resources. It is a geographic code, meaning that the number is tied to a physical location. However, with the rise of VoIP and number portability, some numbers with this code may be used by services located elsewhere, but the code still signifies a South Island presence. The region is served by a mix of copper, fiber, and mobile networks, with Chorus and local fiber companies providing fixed-line infrastructure.
Caller Instructions
For local callers within the South Island, dial 03 followed by the seven-digit number. For callers from other parts of New Zealand (e.g., from Auckland or Wellington), the same format applies: 03 + seven-digit number. For international callers, dial your country's exit code (e.g., 011 from the US, 00 from most European countries), then 64, then 3, and then the seven-digit number. For example, to call a Christchurch number from the US, you would dial 011 64 3 345 6789. If you are calling a mobile number, you would use the mobile prefix (e.g., 021, 022, 027) instead, as mobile numbers are non-geographic.