Just had to enter my mobile number into a Microsoft Certification Website that has an old style phone entry field with a "required" area code.

So it prompted the question. Do mobile phones have an area code if so what is it?

Sort of https://en.m.wikipedia.org/wiki/List_of_mobile_telephone_prefixes_by_country

So for Australia the mobile "area code" is 4 followed by 9 numbers. So looking at everyones Australian mobile numbers prefixes I can see it is true.

0419,0428,0468,0424,0411,0400,0400,0425 etc.

This is a fix for a rare corner case which only a few will ever worry about. Just glad I'm not blogging for clicks and traffic.