Northern Territory

The Northern Territory is one of two federal territories on the Australian mainland and has a population of roughly 252,000 — the smallest of any state or mainland territory. The Top End around Darwin is tropical and monsoonal; the Red Centre around Alice Springs is arid desert. The Territory's economy is anchored by mining (manganese on Groote Eylandt, bauxite at Gove), defence (the Larrakeyah and Robertson Barracks installations), tourism through Uluru-Kata Tjuta and Kakadu, and pastoral grazing across the vast cattle stations of the interior. The NT also operates on its own time zone, half an hour behind Queensland.

Plates issued in the Northern Territory follow the CA-12-AB format: two letters, two digits, then two more letters, e.g. CA-12-AB. The current series is administered by the Motor Vehicle Registry on a white base with red ochre characters and the slogan "NT - Outback Australia" along the bottom. The red ochre colour is taken from the iron-rich soils of the interior and is the most distinctive feature of an NT plate — no other Australian jurisdiction uses that colour as its passenger-plate primary. The six-character alpha-numeric-alpha shape replaced the older all-numeric 000-000 Territory series in the early 2010s once that pattern approached exhaustion.

NT plate strings carry no regional signal. A plate issued in Darwin reads identically, in shape, to one issued in Alice Springs, Katherine, or Tennant Creek. The Territory's small registration base means the CA-12-AB shape has very comfortable headroom. Older all-numeric plates remain on legacy vehicles and are not modelled by the standard validator; personalised plates, heavy vehicle series, and motorcycle issues each follow their own conventions. On an NT road today, the red-ochre CA-12-AB shape dominates the passenger fleet.