Australian phone numbers are managed by the ACMA, and geographic numbers are allocated in ranges tied to Standard Zone Units (SZUs), not to individual suburbs. This article explains why your suburb may not be listed when you look for a number, and why the numbers Crazytel offers may not start with the prefix you expect for your area.

How Australian phone numbers are structured

Geographic (landline style) numbers in Australia have 10 digits: an area code followed by an 8-digit local number.

• (02) New South Wales and the ACT
• (03) Victoria and Tasmania
• (07) Queensland
• (08) South Australia, Western Australia, and the Northern Territory

Who manages number ranges: ACMA

The Australian Communications and Media Authority (ACMA) manages the Telecommunications Numbering Plan 1997, which sets the framework for how Australian numbers are structured and issued.

ACMA does not hand out numbers one at a time. It allocates geographic numbers to individual phone companies (carriage service providers) in ranges, which are blocks of numbers. The Register of Numbers records which provider has been allocated each specific number or range.

Why your suburb may not be listed: SZU bracketing

Geographic numbers are not allocated suburb by suburb. They are allocated by Standard Zone Unit (SZU). An SZU is the area to which geographic numbers are allocated, and every range sits inside one SZU.

• Many SZUs are named after a major exchange area or town. For example, in Western Australia, ranges in (08) 65x are recorded against the Herne Hill and Perth SZUs.
• One SZU can cover many suburbs and neighbouring towns at once.

So when you browse number ranges, you may see a nearby larger town or zone name instead of your exact suburb. Your suburb is not missing. It sits inside the bracket of that SZU.

ACMA publishes the official Register of Standard Zone Units listing the SZUs for all of Australia, and you can check it yourself here: ACMA Register of Standard Zone Units (SZU).

Why Crazytel's numbers may not match your local pattern

Two things combine here:

1. Each provider holds its own ranges. ACMA allocates ranges to providers individually. Telstra, as the original network operator in most areas, holds many of the traditional ranges, and Optus and other carriers hold their own. If your neighbours are on Telstra, their numbers can share a prefix that other providers simply do not have.

1. Crazytel is not partnered with Telstra, Optus, or other carriers. The numbers we offer come from the ranges ACMA has allocated to us. The prefixes available in your area through our portal can therefore differ from the Telstra or Optus numbers you see around you, even though both are valid numbers for the same local area.

A number with a different prefix is still a normal, working local number. Calls to and from it work exactly the same, and geographic numbers can be ported to other Australian providers later if you ever move.

What this means when choosing a Crazytel number

• Search by area code and by the ranges listed, not only by your exact suburb name.
• If your suburb is not listed, check the nearby SZU or zone it falls under.
• Availability depends on the ranges we currently hold, so the list of prefixes can change over time.
• Already have a number with another provider? You can port it to Crazytel and keep it.

Related articles

• How to Buy a Number: how to purchase a number from the Crazytel Customer Portal
• Porting a number to Crazytel: keep your existing number when you move to us
• What Numbers Can Crazytel support?
• ACMA Register of Standard Zone Units (SZU): the official ACMA database of SZUs, if you want to verify how ranges are bracketed