# What is RUC?

RUC is the name of the tax ID in Peru, Ecuador and Paraguay, and the three are different numbers. In Peru it has 11 digits and companies start with 20. In Ecuador a company's has 13 digits. In Paraguay it is a number with a check digit after a hyphen. Each is shown as its registry writes it.

- The RUC in Peru: how to read a company's tax ID: https://testigomexico.com/guides/ruc-peru
- Manufacturers in Peru: the public record explained: https://testigomexico.com/guides/public-record-peru
- How to check a supplier in Latin America before you visit: https://testigomexico.com/guides/check-supplier-latin-america
- Glossary: the words behind every record: RUC (Registro Único de Contribuyentes): https://testigomexico.com/glossary#ruc


Cite as: Testigo, "What is RUC?", https://testigomexico.com/questions/what-is-ruc, data file 2026-10-12.

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This is the Markdown version of https://testigomexico.com/questions/what-is-ruc. Testigo: Testigo is supplier intelligence for people who source from Latin America: a search over manufacturers taken from the official public registry of each country. Each record shows its source, its date and what was not checked.