ACMA Changes to Outbound CLI
Posted: 1 April 2021

New regulatory requirements have been introduced by the Australian Communications and Media Authority (ACMA) which will apply to all voice service providers and carriers. These changes commenced from 1st April, 2021 and are currently in effect.

What changes are being made and why?

The changes relate to a new industry code aimed at reducing scam calls in Australia by regulating the outbound calling line identifier (CLI). An outbound CLI is the number that people see when they receive a call.

Who will be impacted by these changes?

Many Australian carriers have a valid Australian phone number assigned to each of their services or use their main business phone number as their outbound CLI. These businesses comply with the code and will not be impacted by the new regulations.

Calls made using an outbound CLI that doesn’t meet new regulations may be blocked in the network. The following are prohibited by the new regulatory code:

  • CLI is not a valid Australian number
  • CLI is missing or blank
  • CLI that is a 13, 1300 or 1800 number
  • Dummy CLIs

Further information

The code ‘Reducing Scam Calls’ (C661:2020) is available on the Communications Alliance website at https://www.commsalliance.com.au/Documents/all/codes/c661

You can view the ACMA website at https://www.acma.gov.au/calling-line-identification-and-spoofing

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