The new docs.trellix.com features a modernized UI and AI-powered conversational search. Content is currently available in English, with additional languages launching in early November 2026. We hope you enjoy the updated experience.

Mexico Individual Tax Identification Number (RFC)

Prev Next

Mexico Registro Federal de Contibuyentes (RFC) for individuals is a 13–character long unique registration number issued by Mexico's tax collection agency Servicio de Administracion Tributaria.

Validator

Mexican Individual RFC — Validates Mod11 checksum.

Matched expressions

Regex expressions

Description

Score

\b[A-Z][AEIOU][A-Z]{2}[0-9]{2}(?:0[1-9]|1[0-2])(?:[1-2][0-9]|0[1-9]|3[0-1])[A-Z0-9]{2}[0-9A]\b

Matches a 13-character long case-sensitive string, where:

  • Character 1: A-Z

  • Character 2: AEIOU

  • Character 3–4: A-Z

  • Character 5–6: 01–99

  • Character 7–8: 01–12

  • Character 9–10: 01–31

  • Character 11–12: A-Z or 0–9

  • Character 13: 0–9 or A

1

\b[a-z][aeiou][a-z]{2}[0-9]{2}(?:0[1-9]|1[0-2])(?:[1-2][0-9]|0[1-9]|3[0-1])[a-z0-9]{2}[0-9a]\b

Matches a 13-character long case-sensitive string, where:

  • Character 1: A-Z

  • Character 2: AEIOU

  • Character 3–4: A-Z

  • Character 5–6: 01–99

  • Character 7–8: 01–12

  • Character 9–10: 01–31

  • Character 11–12: A-Z or 0–9

  • Character 13: 0–9 or A

1



Ignored expressions

None