On Wednesday 20 June 2012, Bob Hoffman bob@bobhoffman.com wrote:
I got a spam today (from a yahoo server, surprise!) with nothing but a single link.
http:// 2927755261/
2927755261 in hexadecimal is AE81FFFD. If you change this to AE.81.FF.FD and convert it back to decimal, you get 174.129.255.253, which is apparently the IP address that http://www.ip- adress.com/ip_tracer/2927755261 gave you.
I don't know why Web browsers accept this format, and I haven't seen this trick in several years.