Area Code 2857 – Sydney
The phone area code for Sydney is 2857 (international format +612857). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2857
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Sydney
Overview
The Australian telephone country code +61 is followed by the national significant number, which for geographic numbers begins with a single-digit area code. The prefix 2857 is a geographic allocation within the Sydney metropolitan region, corresponding to the broader 02 area code. As part of the Australian Numbering Plan administered by the Australian Communications and Media Authority (ACMA), numbers starting with 2857 are assigned to fixed-line services and are primarily used by businesses and residents in specific Sydney suburbs.
Coverage and Administration
The 2857 prefix falls under the 02 geographic area code, which covers New South Wales (NSW) and the Australian Capital Territory (ACT). Within this region, 2857 is specifically allocated to the Sydney metropolitan area, including central business districts and surrounding suburbs. The prefix is administered by the ACMA and assigned to licensed telecommunications carriers, who may allocate numbers to end users or service providers. The exact geographic boundaries can vary, and number portability may mean that a number with this prefix is not necessarily physically located in Sydney, but it remains associated with the original geographic allocation.
Dialing Formats
For local callers within Australia, the number is dialed as a full national number: 02 8570 xxxx (where xxxx is the subscriber number). Note that the leading '0' is part of the national trunk prefix and is dropped when dialing from abroad. For international callers, the correct format is +61 2 8570 xxxx or +61 28570 xxxx (without spaces). The area code '2' is the national destination code, and '8570' is the exchange or central office code. When dialing from a mobile phone in Australia, it is common to use the full national number including the leading '0'.
Numbering and Overlay Considerations
The 02 area code is one of the oldest in Australia and has been subject to overlay planning to accommodate growing demand. However, as of the current numbering plan, there is no overlay for the 02 region; the area code remains a single geographic code. Subscribers within the 02 region do not need to dial the area code for local calls within the same area code, but they must include it when calling from outside the region. The number length for geographic numbers in Australia is 10 digits including the leading '0' (or 8 digits after the area code).
Caller Instructions
For callers within Sydney or the 02 region, simply dial the eight-digit local number: 8570 xxxx. For callers outside the 02 region but still within Australia, dial 02 8570 xxxx. For international callers, dial your country's exit code, then 61 2 8570 xxxx. Always verify the number with the recipient, as number portability may have reassigned the number to a different provider or location.