To message my sons mobile from L.A to Aust what country/area codes needed prior his phone number?

or:To message my sons mobile from L.A to Aust what country/area codes needed prior his phone number?or:you need to ask you son or the network provide

or:To message my sons mobile from L.A to Aust what country/area codes needed prior his phone number?

or:you need to ask you son or the network provider. Your son is the better bet.

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