Area Code 12 – Casey

Overview

The +672 12 prefix is a geographic area code assigned to Casey, a permanent Australian research station located in the Australian Antarctic Territory. It is part of the Australian external territory numbering plan, administered under the Australian Communications and Media Authority (ACMA). The code is used exclusively for the station's administrative and operational telecommunications, including voice calls, fax, and data links. Casey is one of the few inhabited places on the continent with a public telephone number, alongside other Antarctic bases such as Davis (+672 10) and Mawson (+672 11).

Coverage and Jurisdiction

Casey Station is situated on the Budd Coast of Wilkes Land, approximately 3,880 kilometers south of Perth, Western Australia. The prefix +672 12 is non-geographic in the traditional sense, as it does not correspond to a terrestrial landline area but rather to a specific Antarctic research facility. The station operates year-round, with a population varying between 20 and 100 personnel depending on the season. All calls to Casey are routed via satellite links to the Australian mainland, and the station is part of the Australian Antarctic Division's communications network.

Dialing Formats

To call Casey from overseas, dial the international access code (e.g., 00 from most countries, 011 from the United States), followed by 672, then 12, and the local extension number. For example, a call to a local extension 3456 would be dialed as +672 12 3456. From within Australia, callers must use the international prefix 0011 or the alternative + sign, as +672 is not part of the Australian national numbering plan. There is no local dialing format for Casey, as it is not accessible via a domestic Australian number. Callers should note that the station's phone system is designed to handle both voice and fax, and extensions are typically 4 to 6 digits long.

Caller Instructions

For international callers, it is essential to verify the correct extension with the Australian Antarctic Division, as the station's directory is not publicly listed. Calls to Casey are subject to international tariffs and may incur higher charges due to satellite routing. For those calling from within Antarctica, other bases can reach Casey via the Antarctic telecommunication network using specific short codes, but these are not part of the public switched telephone network. Emergency calls from Casey are handled by the station's medical and safety officers, not by public emergency services.

Technical Considerations

The +672 12 prefix is allocated under the ITU-T E.164 international numbering plan, with the country code 672 assigned to the Australian Antarctic Territory and Norfolk Island. However, Norfolk Island uses +672 3, while the Antarctic bases use +672 1. This distinction is crucial for routing. The service is provided via a mix of satellite (e.g., Iridium, Inmarsat) and microwave links, ensuring redundancy. Overlay or area code changes are not anticipated, as the station's population is transient and the numbering is managed centrally.