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 0421 Details and Prefixes
General Details about Area Code 0421
Country Australia
Capital City Canberra
Time Zone UTC+08:00 - UTC+10:00
Phone Type Mobile

Area Code 0421 Prefixes

Prefix Mobile Phone Company
0421272 Optus
0421904 Optus
0421827 Optus
0421935 Optus
0421238 Optus
0421834 Optus
0421143 Optus
0421227 Optus
0421183 Optus
0421589 Optus
0421884 Optus
0421938 Optus
0421737 Optus
0421962 Optus
0421211 Optus
0421707 Optus
0421000 Optus
0421945 Optus
0421895 Optus
0421710 Optus
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