The first domain name registered on the internet was symbolics.com.
Why it is true
It was registered in nineteen eighty-five by a computer company in Massachusetts, marking the beginning of the domain era.
Source: Internet Archive
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.