.top is a generic top-level domain (gTLD), which was officially delegated in ICANN's New gTLD Program in August 2014.
There is no restriction to register a .top domain name. So anyone can register it. .top is operated by Jiangsu Bangning Group in China.
.top reached 100 thousand registered domain names in May 2015 and 1 million in January 2016.
Since the open registration day in November 2014, .top extension is intended to mean being at top of what you do.
.top ranks #9 among all domain extensions, and #6 among all generic extensions (gTLDs). Currently, there are 4.7M registered .top domain names. Top Registry is the current registry of .top extension.