In reply to Mel Waldner.

The SOUNDEX function is documented, so you can look up how it works. It keeps the first character, excludes all non-alphabetical characters and vowels, and encodes consonant classes. Consequently, a string of numbers results in retaining only the first character and excluding the rest. So your expression asks whether '1' = '1', which is true. The string '1234' would also match
'1-A', '1, 2, 3', and '1999'.