Mobile phone numbers begin with 04, followed by eight digits. e.g. 04yy yxx xxx. The y-digit codes are allocated per network, although with the introduction of number portability, there is no longer a fixed relationship between the mobile phone number and the network it uses. New numbers are still allocated to phone companies in blocks, so a new number will generally still be on its "home" network.

Within Australia, mobile numbers must always be dialed with all 10 digits, no matter where they are being called from. 04 is a prefix, not an "area code", as such.

 

Area Code 0431 Details and Prefixes
General Details about Area Code 0431
Country Australia
Capital City Canberra
Time Zone UTC+08:00 - UTC+10:00
Phone Type Mobile

Area Code 0431 Prefixes

Prefix Mobile Phone Company
0431187 Optus
0431160 Optus
0431607 Optus
0431219 Optus
0431743 Optus
0431895 Optus
0431884 Optus
0431979 Optus
0431909 Optus
0431811 Optus
0431876 Optus
0431558 Optus
0431062 Optus
0431566 Optus
0431029 Optus
0431346 Optus
0431423 Optus
0431588 Optus
0431823 Optus
0431502 Optus
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