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CEI Generator

Generate random valid CEI numbers

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Generated CEIs

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Use the CEI generator to create a valid CEI number.

The algorithm used to generate the CEI code merely follows a given pattern. Generated CEIs are possibly not even real and should not be used for any illegal activity.

What is CEI?

The Cadastro Específico do INSS (CEI) is used by individuals who are legally equivalent to companies—natural persons who, in exercising their activities, have company status.

The CEI generates 12-digit numbers; the last digit is the verification number obtained from the sum of the preceding digits.

Generation and Validation of CEI

The CEI generator multiplies the first eleven digits by weights, sums them, adds the units and tens of the sum, then subtracts the units digit from 10 to obtain the verification digit.

Using the tool

This tool was developed for programmers and testers who have the constant need to enter different CEI numbers in developing forms.

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