Area Code 2423 – Kiama
The phone area code for Kiama is 2423 (international format +612423). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2423
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Kiama
Geographic Coverage and Administrative Jurisdiction
The Australian area code 02 4232 is a geographic allocation within the New South Wales (NSW) numbering plan, specifically serving the coastal town of Kiama and its surrounding localities. Kiama is a municipality in the Illawarra region, situated approximately 120 kilometres south of Sydney. The numbering area encompasses Kiama itself, as well as nearby suburbs and towns such as Kiama Downs, Kiama Heights, Bombo, and Jamberoo. The prefix is administered under the Australian Communications and Media Authority (ACMA) framework, which designates geographic numbers based on physical location, and is assigned to local exchange areas that route calls via the public switched telephone network (PSTN).
Dialing Formats and Caller Instructions
For callers within Australia, the number is dialled in its full national format: (02) 4232 XXXX, where the leading '0' is the trunk prefix. Internationally, callers must replace the trunk prefix with the Australian country code +61, resulting in +61 2 4232 XXXX. Note that the area code '2' is retained after the country code, and the '0' is omitted. For example, a local Kiama number might be 02 4232 1234; from overseas, dial +61 2 4232 1234.
Local calls within the Kiama area do not require the area code if dialling from a landline in the same geographic region, but due to the widespread adoption of full national dialling, it is common practice to include the area code even for local calls. There are no overlay codes currently active in the Kiama region, so the 02 4232 prefix is unique to this area.
Technical and Regulatory Considerations
As a geographic number, the prefix is tied to a physical location, and callers should be aware that calls to 02 4232 numbers are charged at standard local or national rates depending on the caller's location and plan. The number is not portable to other geographic areas, but number portability within the same geographic region is available, allowing customers to switch service providers while retaining their number. This prefix is used for both residential and business landlines, and increasingly for VoIP services that are registered to an address within the Kiama exchange area.
For businesses, having a local Kiama number can enhance trust with local customers and is often used for local marketing. When calling from a mobile phone, the same dialling rules apply, and the call is routed through the mobile network to the PSTN.