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Social-fiscal number used by the Dutch Tax Authority (sofi-nummer)

  • Published on Sep 2, 2026
  • 1 minute(s) read
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Social-fiscal number used by the Dutch Tax Authority is a unique number for anyone in respect of matters related to the Dutch government authorities.

Validator

Social-fiscal number used by the Dutch Tax Authority — Validates Mod 11 checksum

Matched expressions

Regex expressions

Description

Score

\b\d{9}\b

Matches a 9-digit number of the format NNNNNNNNN.

1



Ignored expressions

None

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