Posted by Stephen Calnan on 11/16/05 17:38

> > The only problem with this is that it would take "444" which is not a
> > valid call.

Wikipedia defines a HAM call sign here:
http://en.wikipedia.org/wiki/Call_sign#Amateur_radio

A regex based upon this definition might be:
/\b(([A-Z]{1,2})|([A-Z][0-9]))[0-9][A-Z]{1,3}\b/

I tested this out a tiny bit and it seems to work OK. Good luck.

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