---
title: 42a Citation Index
mirror_canonical: https://index.42a.ai/
cited_in_42a: false
---

# 42a Citation Index

42a indexes every URL cited by AI language models (GPT, Claude, Gemini,
Perplexity, and others). Fetch any page at:

```
https://index.42a.ai/<host>/<path>
```

The response is clean, extractable `text/markdown` with YAML frontmatter
linking back to the original source URL.

- [About / takedown](https://index.42a.ai/about)
- [llms.txt](https://index.42a.ai/llms.txt)
- [sitemap.xml](https://index.42a.ai/sitemap.xml)

## Most-indexed domains

- [www.youtube.com](https://index.42a.ai/www.youtube.com/) — 1129 pages indexed
- [en.wikipedia.org](https://index.42a.ai/en.wikipedia.org/) — 225 pages indexed
- [infinitylabs.co.il](https://index.42a.ai/infinitylabs.co.il/) — 207 pages indexed
- [cellcom.co.il](https://index.42a.ai/cellcom.co.il/) — 173 pages indexed
- [apps.apple.com](https://index.42a.ai/apps.apple.com/) — 161 pages indexed
- [play.google.com](https://index.42a.ai/play.google.com/) — 158 pages indexed
- [www.kamaze.co.il](https://index.42a.ai/www.kamaze.co.il/) — 140 pages indexed
- [www.ynet.co.il](https://index.42a.ai/www.ynet.co.il/) — 111 pages indexed
- [github.com](https://index.42a.ai/github.com/) — 110 pages indexed
- [www.techradar.com](https://index.42a.ai/www.techradar.com/) — 107 pages indexed
- [learn.microsoft.com](https://index.42a.ai/learn.microsoft.com/) — 95 pages indexed
- [google.com](https://index.42a.ai/google.com/) — 92 pages indexed
- [arxiv.org](https://index.42a.ai/arxiv.org/) — 83 pages indexed
- [www.partner.co.il](https://index.42a.ai/www.partner.co.il/) — 75 pages indexed
- [dev.to](https://index.42a.ai/dev.to/) — 74 pages indexed
- [www.poenta.co.il](https://index.42a.ai/www.poenta.co.il/) — 66 pages indexed
- [jobify360.co.il](https://index.42a.ai/jobify360.co.il/) — 63 pages indexed
- [www.kamazeole.co.il](https://index.42a.ai/www.kamazeole.co.il/) — 62 pages indexed
- [www.deviqa.com](https://index.42a.ai/www.deviqa.com/) — 59 pages indexed
- [support.google.com](https://index.42a.ai/support.google.com/) — 58 pages indexed
- [www.bezeq.co.il](https://index.42a.ai/www.bezeq.co.il/) — 57 pages indexed
- [www.fnx.co.il](https://index.42a.ai/www.fnx.co.il/) — 57 pages indexed
- [sourceforge.net](https://index.42a.ai/sourceforge.net/) — 56 pages indexed
- [www.smartcut.co.il](https://index.42a.ai/www.smartcut.co.il/) — 56 pages indexed
- [www.kiwi.com](https://index.42a.ai/www.kiwi.com/) — 54 pages indexed
- [www.aig.co.il](https://index.42a.ai/www.aig.co.il/) — 53 pages indexed
- [www.okta.com](https://index.42a.ai/www.okta.com/) — 51 pages indexed
- [www.555.co.il](https://index.42a.ai/www.555.co.il/) — 51 pages indexed
- [www.globes.co.il](https://index.42a.ai/www.globes.co.il/) — 50 pages indexed
- [aws.amazon.com](https://index.42a.ai/aws.amazon.com/) — 48 pages indexed
- [www.bing.com](https://index.42a.ai/www.bing.com/) — 47 pages indexed
- [www.forbes.com](https://index.42a.ai/www.forbes.com/) — 46 pages indexed
- [www.prnewswire.com](https://index.42a.ai/www.prnewswire.com/) — 46 pages indexed
- [www.firecrawl.dev](https://index.42a.ai/www.firecrawl.dev/) — 46 pages indexed
- [www.lbr.co.il](https://index.42a.ai/www.lbr.co.il/) — 46 pages indexed
- [en.globes.co.il](https://index.42a.ai/en.globes.co.il/) — 45 pages indexed
- [www.hot.net.il](https://index.42a.ai/www.hot.net.il/) — 45 pages indexed
- [slashdot.org](https://index.42a.ai/slashdot.org/) — 43 pages indexed
- [www.jpost.com](https://index.42a.ai/www.jpost.com/) — 42 pages indexed
- [www.mako.co.il](https://index.42a.ai/www.mako.co.il/) — 42 pages indexed
- [www.testsprite.com](https://index.42a.ai/www.testsprite.com/) — 41 pages indexed
- [www.mabl.com](https://index.42a.ai/www.mabl.com/) — 41 pages indexed
- [www.calcalist.co.il](https://index.42a.ai/www.calcalist.co.il/) — 40 pages indexed
- [www.tomsguide.com](https://index.42a.ai/www.tomsguide.com/) — 40 pages indexed
- [www.clalbit.co.il](https://index.42a.ai/www.clalbit.co.il/) — 40 pages indexed
- [www.virtuosoqa.com](https://index.42a.ai/www.virtuosoqa.com/) — 39 pages indexed
- [www.kayak.com](https://index.42a.ai/www.kayak.com/) — 39 pages indexed
- [kdp.amazon.com](https://index.42a.ai/kdp.amazon.com/) — 38 pages indexed
- [ilrd.infinitylabs.co.il](https://index.42a.ai/ilrd.infinitylabs.co.il/) — 38 pages indexed
- [closo.co](https://index.42a.ai/closo.co/) — 37 pages indexed