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How secure are Australia's domains?
Most businesses in Australia use a .au domain. Across 2,557,649 of them, here's how their security stacks up — aggregate patterns only, never an individual business. As of 2026-07-29.
In the .au zone — covering Australia — 60.4% of 2,557,649 graded domains earn an F, well below the 73.8% internet-wide average. Only 0.3% reach an A or A+ — the highest protection tier in the census.
We use .au as a stand-in for Australia, based on the domain's ending rather than where a company is legally registered — so Australia businesses using a generic ending like .com aren't counted here.
Grade distribution
| Grade | Domains | Share |
|---|---|---|
| A+ | 932 | 0% |
| A | 5,572 | 0.2% |
| B | 77,305 | 3% |
| C | 304,806 | 11.9% |
| D | 623,985 | 24.4% |
| F | 1,545,049 | 60.4% |
See exactly where your own Australia domain ranks — free and private → Check your domain. Or browse .au in detail and the most & least secure TLDs.