What part of the Middle Ages were the Viking voyages in?

The Viking raids began in 793 AD with a raid on Lindisfarne. The Viking Age ended during the 9th and 10th centuries. There are authors who place the date ending the age at 1066, but calling the French speaking Normans who invaded England Vikings because their ancestors were Vikings a hundred years earlier might be stretching a point a bit too much.

There is a link to an article on the Viking Age below.