long domain name
A domain name that contains more than 26 characters is said to be long. In the past, domain names could not be longer than 26 characters, but the limit was later increased to 67 characters (including the extension, such as .com or .org).
According to The Longest List of Stuff, a URL can actually be a maximum of 263 characters. Here's the longest domain name to date:
NetLingo Classification: Technical Terms