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How secure are Luxembourg's domains?
Most businesses in Luxembourg use a .lu domain. Across 54,748 of them, here's how their security stacks up — aggregate patterns only, never an individual business. As of 2026-07-29.
In the .lu zone — covering Luxembourg — 45.2% of 54,748 graded domains earn an F, well below the 73.8% internet-wide average. DMARC enforcement here stands at 18.5% — above the 11.8% census-wide rate.
We use .lu as a stand-in for Luxembourg, based on the domain's ending rather than where a company is legally registered — so Luxembourg businesses using a generic ending like .com aren't counted here.
Grade distribution
| Grade | Domains | Share |
|---|---|---|
| A+ | 50 | 0.1% |
| A | 238 | 0.4% |
| B | 2,726 | 5% |
| C | 10,072 | 18.4% |
| D | 16,890 | 30.9% |
| F | 24,772 | 45.2% |
See exactly where your own Luxembourg domain ranks — free and private → Check your domain. Or browse .lu in detail and the most & least secure TLDs.
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