De or het sponsorcode?

The correct Dutch article is:

de sponsorcode

Rule Words ending in -ode: always de. See the rule

How to use sponsorcode

the sponsorcodede sponsorcode
this sponsorcodedeze sponsorcode
that sponsorcodedie sponsorcode
our sponsorcodeonze sponsorcode
your sponsorcodejouw sponsorcode
every sponsorcodeelke sponsorcode
which sponsorcode?welke sponsorcode?
a big sponsorcode / the big sponsorcodeeen grote sponsorcode, de grote sponsorcode