How do you write Australia number with country code?

To write any Australian telephone number (mobile or landline) in correct international format, replace the trunk prefix 0 with telephone country code +61. For example, 04xx xxx xxx becomes +61 4xx xxx xxx. Do not use any punctuation marks of any kind except for the single plus symbol at the beginning. In particular, it is incorrect and confusing to write, for example, +61 (0)4xx xxx xxx.