Chinese Number Websites: The Secret Meaning of URLs (2014)
> The phone companies China Telecom and China Unicom simply reappropriated their well-known customer service numbers as domain names, 10086.cn and 10010.cn, respectively.https://9292.nl is an example of this outside China, taking its name from 0900-9292 (a phone number you can call to get public transport travel directions, now largely replaced by the website/app).