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Who links to zu.de?
620 domains link to zu.de in the latest Common Crawl web graph (Aug-Oct 2026). Below are the 20 strongest. Strength is how many domains link to that referrer.
Common Crawl graph cc-main-2026-aug-sep-oct · read 2026-10-23 · 620 referring domains
Strongest referring domains
| # | Referring domain | Domains linking to it |
|---|---|---|
| 1 | google.com | 15,904,056 |
| 2 | wikipedia.org | 2,226,572 |
| 3 | europa.eu | 1,227,455 |
| 4 | blogspot.com | 880,829 |
| 5 | harvard.edu | 268,680 |
| 6 | zendesk.com | 107,073 |
| 7 | sueddeutsche.de | 44,980 |
| 8 | zeit.de | 43,813 |
| 9 | welt.de | 41,855 |
| 10 | cleverreach.com | 30,733 |
| 11 | fraunhofer.de | 27,933 |
| 12 | usp.br | 22,411 |
| 13 | deutschlandfunk.de | 21,979 |
| 14 | goethe.de | 20,902 |
| 15 | bpb.de | 18,551 |
| 16 | univie.ac.at | 17,441 |
| 17 | podigee.io | 16,931 |
| 18 | baden-wuerttemberg.de | 16,805 |
| 19 | uzh.ch | 16,630 |
| 20 | tum.de | 16,307 |
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Method and limits
Source: Common Crawl's public domain web graph, built from three monthly crawls (134,979,706 domains, 1,817,202,146 links). We count distinct linking domains, not pages, and do not use any third-party backlink index. Common Crawl samples the web, so counts are lower than a full index such as Ahrefs or Semrush; use them to compare sites and spot big referrers, not as an exact total. Updated each quarter, last graph: cc-main-2026-aug-sep-oct. Nofollow and link position are not in this data. Adult-content domains are left out of the list, so a page can show fewer than 20. Spam and link-network domains are shown as they are.
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