I find this sometimes gives incorrect results, as if my fast typing speed and slow link speed cause problems, especially if I backspace multiple times to remove

I find this sometimes gives incorrect results, as if my fast typing speed and slow link speed cause problems, especially if I backspace multiple times to remove characters from the end. I've had false positives because of this, i.e. I've gone away thinking "that's it, and it's available" only to find out the next day from WHOIS that it's been registered for months. So, double-check any you really like with whois(1) or similar.