Some 2.76 million web hostnames were added in June, the second-highest monthly increase and the largest since May 2003, according to U.K.-based web measurement firm Netcraft, reports InternetWeek. Since the first of the year 10.7 million domain names have been registered. "Barring a dramatic slowdown, 2005 should easily exceed the record growth of 16 million hostnames in 2000," Netcraft said in a statement. Among the drivers of the boom - the blog boom, speculation in domain names, and strong online advertising sales.