If I observed correctly, you are looking for numbers of these formats:

1. (123) 234-3456
2. (123)234-3456

m/
  (     # start caption
  \(    # open paranthesis
  \d{3} # 3 digits
  \)    # close paranthesis
  \s?   # 0 or 1 whitespace
  \d{3} # 3 digits
  \-    # 1 dash line
  \d{4} # 4 digits
  )     # end caption
/xg;
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