As of January 1st, 2020 modmore has a new VAT Registration number: NL001103641B07
You'll already find the new number on your invoices, but it may be necessary to update your accounting records accordingly. The old number will no longer validate.
This VAT registration number change is the result of an administrative change for all sole proprietorships in the Netherlands; there has not been any change in company structure or ownership.
Happy new year!