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llms.txt GeneratorThe current index tracks more than 3.6 million cited URLs
Trakkr currently tracks 3,687,821 unique cited URLs in the public citation index.
AI systems do not just cite domains. They return to a large but finite set of pages.
The numbers behind it.
- Unique cited URLs
- 3,687,821 distinct cited URLs in the current snapshot.
- 3.69M
- Citation appearances
- 80,769,585 appearances in the verified October 14, 2026 snapshot.
- 80.8M
The evidence.
Source
AI Citation Index
| Measure | Result |
|---|---|
| Unique cited URLs 3,687,821 distinct cited URLs in the current snapshot. | 3.69M |
| Citation appearances 80,769,585 appearances in the verified October 14, 2026 snapshot. | 80.8M |
Population and method
Built from 80,769,585 citation appearances across 725,777 unique domains in the latest valid snapshot for 1,928 tracked brands, observed from October 3, 2025 to October 14, 2026.
Where the evidence stops
The index is a changing panel of tracked brands and prompts, not a random sample of all AI responses.
Domain share is observational. It does not establish causal influence or reveal the full retrieval set.
The hand-maintained source taxonomy is partial: 88.40% of citation appearances remain in “other”.
Model attribution, response-level citation denominators, geography, raw prompts, and raw responses are not retained in the public aggregate.
What to do with this
URL breadth distinguishes the size of the observed evidence layer from domain-level concentration.
Cite this fact.
Source study: Citation Sources“Trakkr currently tracks 3,687,821 unique cited URLs in the public citation index.”
AI Citation Index - Trakkr Research · The current index tracks more than 3.6 million cited URLs
AI Citation Index · Trakkr Research · Updated 14 October 2026