Aplus.net, New York Internet, and ZeroLag Communications were the most reliable hosting company sites during January 2009. These sites responded to all of the requests made by Netcraft's performance collectors throughout the month, with no failed requests.
Aplus.net was founded in 1992 as Abacus America, Inc., and began offering Internet services in 1995 and hosting services in 1998. Aplus' web site states that they have 250 employees, over 100,000 customers and 6,000 dedicated server customers. They run Apache on FreeBSD, and last made the top spot in June 2008.
ZeroLag Communications is a Los Angeles-based company that offers high performance virtual hosting, fully managed dedicated servers and colocation, as well as T1 and T3 internet connections, web development services and security consulting. Their corporate site runs lighttpd, and they were joint first in September 2008.
Netcraft measures and makes available the response times of fifty leading hosting providers' sites. The performance measurements are made at fifteen minute intervals from separate points around the internet, and averages are calculated over the immediately preceding 24 hour period.
From a customer's point of view, the percentage of failed requests is more pertinent than outages on hosting companies' own sites, as this gives a pointer to reliability of routing, and this is why we choose to rank our table by fewest failed requests, rather than shortest periods of outage.
Further information on the measurement process and current measurements are available.