Custom HTTP response header used as a memorial tribute, not functional tech.
Each cell counts sites that run X-Clacks-Overhead, fall in that traffic tier, and carry that site category. The 7 largest categories for X-Clacks-Overhead get a column; everything else is in Other.
| Traffic tier (est. monthly visits) | Entertainment & Media | Software & Technology | Education | Nonprofit & Community | Arts & Culture | Business Services | Online Shopping | Other categories | Tier total |
|---|---|---|---|---|---|---|---|---|---|
| 1B+ | — | — | — | — | — | — | — | — | 0 |
| 100M to 1B | — | — | — | — | — | — | — | — | 0 |
| 10M to 100M | — | 5 | — | — | — | — | 2 | 2 | 9 |
| 1M to 10M | 9 | 52 | 3 | — | — | — | 11 | 26 | 106 |
| 100K to 1M | 30 | 199 | 25 | 23 | 4 | 13 | 19 | 93 | 522 |
| 10K to 100K | 211 | 260 | 153 | 93 | 37 | 31 | 32 | 325 | 3,757 |
| Under 10K | 692 | 95 | 47 | 33 | 35 | 17 | 5 | 259 | 6,932 |
| Long tail | 21,441 | 4,673 | 1,624 | 1,106 | 1,062 | 831 | 665 | 5,571 | 219,554 |
| X-Clacks-Overhead total | 22,383 | 5,284 | 1,852 | 1,255 | 1,138 | 892 | 734 | 6,276 | 230,880 |
Traffic tiers use our estimated monthly visits for August 2026. 11,326 of the 230,880 X-Clacks-Overhead sites have an estimate. The long tail is the rest.
Site categories are ours, one per site. 39,814 X-Clacks-Overhead sites carry one. Adult sites are counted under Other categories.
A free account doubles this list and turns on country and language filters. Paid plans download the whole list as a file.
