What’s the Domain Threshold?

A reader called in and asked if there was any research I’ve come across that determines the maximum length a URL can still be typed in by a user. That’s a very relevant question for our space, and I don’t recall seeing any research on the topic.

Phone numbers are seven digits because it was believed to be the maximum number of digits people could remember. A recent report on Web design discusses a rule of sevens. That rule finds users become overwhelmed with more than seven navigation links or items in a drop-down box.

Has anyone determined the max for domains? Is there leeway for brand names or more memorable terms used as domains? Got research? Send it it here for consideration in the Stats section.

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