| ARN | arnnet.com.au | 32 |
| ASIO | asio.gov.au | 1 |
| ASPI | uat.aspi.org.au | 1 |
| AWD IT | awd.com.au | 1 |
| About Regional | aboutregional.com.au | 1 |
| Accenture | accenture.com.au | 1 |
| Accounting Times | accountingtimes.com.au | 1 |
| Ace InfoTech | aceinfotech.com.au | 1 |
| AdNews | adnews.com.au | 2 |
| Adelaide Now | www.adelaidenow.com.au | 5 |
| Adelaide Outdoor Kitchens | adelaideoutdoorkitchens.com.au | 1 |
| Alchemy Impact | alchemyimpact.com.au | 1 |
| Amazon | amazon.com.au | 6 |
| Amazon Kindle Store | www.amazon.com.au | 1 |
| Amazon Music | music.amazon.com.au | 1 |
| Analysis & Policy Observatory | apo.org.au | 1 |
| Arena Online | arena.org.au | 1 |
| Arts Council of Wales | arts.wales | 1 |
| Atlassian | atlassian.com | 1 |
| Audible.com.au | audible.com.au | 1 |