There were only a few numbers to check. I've added all examples I found on Wikipedia and on the EU page. I also updated Belgian and French VAT ID checks. Belgian VAT IDs can also begin with a leading zero, and French VAT IDs can be mixed with digits and letters at the first and second position.
ddeboer
commented
7 years ago
Hello!
There were only a few numbers to check. I've added all examples I found on Wikipedia and on the EU page. I also updated Belgian and French VAT ID checks. Belgian VAT IDs can also begin with a leading zero, and French VAT IDs can be mixed with digits and letters at the first and second position.
Some sources:
Regards, Timon