Area Code 3990 – Melbourne
The phone area code for Melbourne is 3990 (international format +613990). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 3990
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Melbourne
Overview of Area Code 3990
Area code 3990 is a geographic numbering allocation within the Australian National Numbering Plan, specifically serving the Melbourne metropolitan region in the state of Victoria. As part of the broader 03 numbering area, 3990 is classified as a National Destination Code (NDC) segment that routes calls to fixed-line services within the Melbourne CBD and its immediate surrounding suburbs. The code is administered by the Australian Communications and Media Authority (ACMA) and is allocated to various telecommunications carriers who provide PSTN and VoIP services to residential and business customers.
Geographic Coverage and Dialing Formats
The 3990 prefix covers a dense urban area, including central business districts, commercial zones, and established residential neighborhoods. It is important to note that within the 03 NDC, local calls are dialed using only eight digits (e.g., 3990 XXXX) when calling from another number within the same 03 area. However, when dialing from outside the 03 region but still within Australia, callers must use the trunk prefix 0 followed by the full NDC and subscriber number: 03 3990 XXXX. For international callers, the correct format is +61 3 3990 XXXX, omitting the leading zero.
Overlay and Numbering Considerations
Melbourne has implemented an overlay numbering plan, meaning that multiple area codes (e.g., 03, 02, etc.) may serve the same geographic region, but 03 remains the dominant code. As a result, local calls within Melbourne require the full 10-digit national significant number (including the 03 area code) even for local calls, a practice that has been in place since 2007. This ensures that number portability and competition among carriers are facilitated without geographic renumbering.
Caller Instructions and Usage
For callers within Melbourne, dialing a 3990 number typically requires the full 10-digit format: 03 3990 XXXX. For callers in other parts of Australia, the same format applies. International callers should replace the leading 0 with the +61 country code and drop the 0, resulting in +61 3 3990 XXXX. It is also common for businesses to use 3990 numbers for customer service lines, and many are now routed over IP networks, allowing for advanced features such as call forwarding and unified communications. When dialing from a mobile phone, the same rules apply, and no additional charges are incurred beyond standard call rates.