How to use Validate RUC (Peru)
Paste an 11-digit RUC and instantly check whether its structure and check digit are correct. Ideal before issuing invoices or loading data into a system. Click Process, then download or copy the result when it is ready.
Privacy and output quality
It validates the structure and check digit using SUNAT’s mod-11 algorithm. It is not a SUNAT lookup: it does not say whether the RUC exists or is active, only whether the number is well formed. Everything happens in your browser.