wilderness - 12:40 pm on Sep 27, 2012 (gmt 0)
Don't recall when the last time was that I attempted using ARIN-WHOIS for IP, however it has functioned yesterday and this morning.
However part of the issue in the past was that it would work one day and not afterwards.
Thus I'll wait and see if the functionality continues.
BTW, tried the previous subnet search I listed and it failed.