Area Code 3230 – Invercargill
The phone area code for Invercargill is 3230 (international format +643230). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 3230
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Invercargill
Overview of Area Code 3230
Area code 3230 is a geographic National Destination Code (NDC) within the New Zealand numbering plan, allocated to the city of Invercargill and its surrounding suburbs. Invercargill is the southernmost city in New Zealand and serves as the commercial and administrative hub of the Southland region. The code 3230 is part of the larger 03 area code, which covers the entire South Island, but the specific prefix 3230 is assigned to the Invercargill exchange area. When dialing a local number within Invercargill, callers typically use the seven-digit subscriber number, but for calls from outside the area, the full national significant number (NSN) must be used, which includes the leading '0' and the area code.
Dialing Formats
For local calls within Invercargill, the standard format is the seven-digit local number, e.g., 230 4567. However, for calls made from other parts of New Zealand, the national dialing format is 03 230 4567, where '03' is the trunk prefix and area code. Internationally, callers should dial +64 3 230 4567, omitting the leading '0' of the area code. It is important to note that the 03 area code also covers other South Island regions such as Christchurch and Dunedin, but the 3230 prefix specifically routes to Invercargill.
Geographic Coverage and Administration
Invercargill is located in the Southland region and is governed by the Invercargill City Council. The 3230 prefix serves the central business district and several residential suburbs, including Appleby, Glengarry, and Richmond. The area is served by a mix of copper and fiber infrastructure, with most lines now supporting VoIP and ADSL/VDSL services. The numbering allocation is administered by the Commerce Commission of New Zealand, which oversees the National Numbering Plan and ensures number portability.
Caller Instructions
For callers within New Zealand, if you are dialing from a mobile phone, you can use either the national format (03 230 4567) or the international format (+64 3 230 4567). For landline calls, the national format is required. If you are calling from overseas, you must use the international format, ensuring you replace the leading '0' with the country code +64. For example, to call a number in Invercargill from the United States, you would dial 011 64 3 230 4567 (or +64 3 230 4567 on a mobile).
Overlay and Numbering Considerations
Currently, there is no overlay code for Invercargill; the 03 area code is used throughout the South Island. However, due to the growth of telecommunications services, the Commerce Commission has implemented number portability, allowing customers to retain their numbers when switching providers. This means that a number with the 3230 prefix may not necessarily be physically located in Invercargill if the number has been ported. Nonetheless, for most practical purposes, 3230 numbers are associated with Invercargill and its immediate environs.