Posted for "cblitzer" <cblitzer@triad.rr.com>:

 They say there is no such thing as a stupid question so here goes:
 What is so special about this number - is it an acronym for something???
 Craig B.

[I imagine a television station broadcasting on ch 5 might like it for their news chopper.
Otherwise, there doesn't appear to be anything else special about the number, other than
it's a single digit with 2 alpha ID's.  Ho-hum......   ]