Dianhuacha is a Chinese online service focused on identifying telephone numbers and helping users understand where calls originate. Established in 2017, the website offers lookup tools for mobile numbers and landline telephone numbers, including information on their registered locations. Visitors can also search city and international dialing codes, browse commonly used numbers, and review numbers marked by users.

Dedicated sections cover suspected scam calls and numbers associated with government agencies and other organizations, supporting users who want to check an unfamiliar caller or find a public contact number. The site also provides a recent-search list and promotes an anti-fraud app, extending its services beyond basic number identification. Its homepage displays a broad selection of recently searched or featured phone numbers, reflecting its emphasis on practical, searchable information.

Dianhuacha presents itself as a resource for everyday telephone lookups and fraud awareness, bringing number searches, area-code references, and marked-number information together in one place