Telephone numbers in Australia plan (including the "Trunk Access Code"), presented in domestic format. (Geographical region boundaries do not exactly follow State borders.) 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
Area code 856 Utilities shortly thereafter. The new area code 856 came into effect on June 12, 1999. For the following five months, permissive dialing was allowed, with calls completed even if area code 856 was not dialed as part of a 10-digit phone number. Since 13 November 1999, use of the area code is required to complete calls from outside the area code. It's one of two area codes in the state (the other being 908) that have yet to be overlaid and still use 7-digit dialling. Area code 856 Area code 856 is an area code located in the U.S. state