www.loonheffingennummer.com
Next to sofinummer.com and banknummer.com I’ve now created loonheffingennummer.com.
Although a loonheffingennummer has the same validations as a sofinummer (but for the extension of e.g. L01), this has allowed me to move all three sites to Google AppEngine, cancel my Dreamhost account and host them for free.
