Perhaps it's just me but I'm always a bit hesitant to use third party domain checkers. I can't speak for namechk.com but who says the owner of such service isn'

Perhaps it's just me but I'm always a bit hesitant to use third party domain checkers. I can't speak for namechk.com but who says the owner of such service isn't logging all entries? Whenever I want to verify whether a domain is available I use the official whois servers.