Area Code 8923 – Perth

Overview of Australia's +61 8923 Geographic Prefix

The +61 8923 prefix is a geographic telephone number range allocated within the Australian Numbering Plan, specifically serving the Perth metropolitan area in Western Australia. As a National Destination Code (NDC) segment under the broader 08 area code, 8923 is assigned to fixed-line PSTN and VoIP services operating within the Perth region. This prefix is administered by the Australian Communications and Media Authority (ACMA) and is used by multiple carriers, including Telstra, Optus, and various competitive local exchange carriers.

Geographic Coverage and Administrative Jurisdiction

The 8923 prefix covers the central and inner-northern suburbs of Perth, including postcodes such as 6000 (Perth CBD), 6003 (Highgate), 6004 (East Perth), 6005 (West Perth), and 6006 (North Perth). These areas fall under the jurisdiction of the City of Perth and the City of Vincent. The prefix is part of the larger 08 numbering area, which encompasses all of Western Australia and the Northern Territory, but the 8923 range is specifically designated for the Perth central business district and adjacent residential and commercial zones.

Dialing Formats and Caller Instructions

For local callers within Australia, the number is dialed as a 10-digit national significant number: 08 8923 XXXX. The leading '0' is the trunk prefix used for domestic calls. For international callers, the number must be dialed with Australia's country code +61, omitting the trunk prefix: +61 8 8923 XXXX. For example, a typical number in this range would be +61 8 8923 4567. When dialing from a mobile phone within Australia, the same 10-digit format applies, regardless of the caller's location.

Overlay and Number Portability Considerations

Perth does not currently have an overlay area code; the 08 area code is the sole geographic code for the region. However, due to number portability, a number with the 8923 prefix may be assigned to a service located outside the traditional geographic area, as customers can retain their number when moving within Australia. This means that while the prefix indicates a Perth-based number, the actual physical location of the line may differ. For businesses, this prefix provides a local presence in Perth, which can be beneficial for customer trust and local search engine optimization.

Technical and Regulatory Notes

The 8923 prefix supports both traditional PSTN services and VoIP services, with full E.164 compliance. Calls to these numbers are typically charged at standard geographic rates, and there are no premium or special service charges unless explicitly stated by the service provider. For emergency services, all numbers in this range can dial 000 (Australia's emergency number) without any additional charges. When implementing these numbers in PBX systems or VoIP gateways, ensure that the international format (+61 8 8923 XXXX) is used for outbound international calls, and the national format (08 8923 XXXX) for domestic calls.