Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.com is the longest single word (without hyphens) .com domain name in the world. It was registered by Internetters on 21st October 1999.
This Welsh town actually exists and its name translates as "The church of St. Mary in the hollow of white hazel trees near the rapid whirlpool by St. Tysilio's of the red cave".
For brevity, it is understandable that many of the locals simply refer to their village as "Llanfair" www.llanfair.com or "Llanfair PG" or "Llanfairpwll" which, of course, makes for easier typing and is faster to pronounce.
Prior to October 1999 it was not possible to register .com domain names longer than 26 characters (including 4 for the .com suffix). This denied many businesses and organisations the ability to register their full trading names as a .com domain name. However in October 1999, it became possible to register domain names up to 67 characters in length (including the 4 for the .com suffix).
Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch The longest town name in the world means "The
church of St. Mary in the hollow of white hazel trees near the rapid whirlpool by St. Tysilio's of the red cave".
For More detail about city
http://en.wikipedia.org/wiki/Llanfairpwllgwyngyll