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Who links to ptj.de?
2,600 domains link to ptj.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 · 2,600 referring domains
Strongest referring domains
| # | Referring domain | Domains linking to it |
|---|---|---|
| 1 | wikipedia.org | 2,226,572 |
| 2 | europa.eu | 1,227,455 |
| 3 | blogspot.com | 880,829 |
| 4 | outlook.com | 233,817 |
| 5 | mdpi.com | 133,989 |
| 6 | frontiersin.org | 127,317 |
| 7 | bayern.de | 48,313 |
| 8 | www.gov.pl | 41,761 |
| 9 | nrw.de | 39,470 |
| 10 | berlin.de | 30,933 |
| 11 | mpg.de | 28,415 |
| 12 | fraunhofer.de | 27,933 |
| 13 | gencat.cat | 25,898 |
| 14 | bundesregierung.de | 23,892 |
| 15 | ihk.de | 23,318 |
| 16 | sophos.com | 22,520 |
| 17 | umweltbundesamt.de | 21,482 |
| 18 | gov.ro | 21,453 |
| 19 | niedersachsen.de | 20,724 |
| 20 | rwth-aachen.de | 19,654 |
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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.
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