The Australian telephone numbering plan describes the allocation of phone numbers in Australia. It has changed many times, the most recent major reorganisation by the Australian Communications & Media Authority taking place between 1994 and 1998. Overview For landline telephony, Australia is now geographically divided into four large areas, three of which cover more than one state and/or territory. All local telephone numbers within these four areas are of eight digits, consisting (mainly) of a four digit exchange code plus a four digit number. The national significant number consists of a single digit area code followed by the local eight digit number – a total of nine digits. Within Australia, to access the number of a landline telephone in an area other than that in which the caller is located (including callers using mobile phones), it is first necessary to dial the Australian trunk code of 0 plus the area code, followed by the local number. Thus, the full national number (FNN) has ten digits: 0x xxxx xxxx. 00 International and Emergency access (see below for details) 01 Alternative phone services 014 Satellite phones 0163 Pager numbers 0198 Data numbers (e.g. 0198 308 888 is the dial-up PoP number for Telstra) 02 Geographic: Central East region (NSW, ACT) 03 Geographic: South-east region (VIC, TAS) 04 Digital Mobile services (3G, 4G, 5G and GSM) 0550 Location Independent Communication Services 07 Geographic: North-east region (QLD) 08 Geographic: Central and West region (SA, NT, WA) 1 Non-geographic numbers (mostly for domestic use only; see below for details) The current numbering plan would appear to be sufficient to cope with potential increase in demand for services for quite some time to come. The 06 and 09 area codes are completely unused. In addition, each current area code has large number ranges unallocated. When dialling from outside Australia, after dialling the appropriate International Access Code it is necessary to dial the Country Code for Australia (61) followed by the nine digit national significant number. (The + symbol is used to represent the International Access Code, e.g. +61 3 xxxx xxxx for a number in Victoria/Tasmania or +61 4xx xxx xxx for a mobile number). Some numbers beginning with a 1 may be dialled without any replacement, after dialling the required international access code and the country code for Australia (+61). (see below) Australian local area numbers are eight digits in length, conventionally written in the