RCS number
The number the Trade and Companies Register assigns to every entity on registration: a section letter followed by up to six digits.
The RCS number is a Luxembourg entity's primary identifier. The Trade and Companies Register issues it on registration, it never changes, and it is not reissued after a striking-off.
The letter in front of the digits is the register section the entity sits in — B for commercial companies, which is nearly all of them. It is part of the number, not a prefix to drop. B18902 and F18902 are different entities, and a search that drops the letter cannot tell them apart.
The RCS number is not the VAT number. They are two different numbers issued by two different authorities, and neither can be derived from the other.
Where this figure comes from
Read from the deposits filed with the Trade and Companies Register.
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