There should be a way the system understands the different ways a TN can be displayed/formatted and searched, but at present, it seems it needs to be exactly the same as the interaction shows in the history.

Please see the screenshots.
If a number is formatted in 3 different ways as it's used in RCX:
(734) 279-2221
17342792221
734-279-2221

When you search by these formats, you only get see the exact format the text is searched as, instead of all instances in which the number can be formatted as. This causes an issue as you search for a customer's info and/or if they have already spoken with us.

RCX engineers were able to confirm that this is how the search function does and should work, as it stands today. So when you are searching there, you are using a search feature for text which means that it will look for that exact phrase. What would need to be done in order for this to work smoothly would be adding a search parameter that would be able to remove things like the dashes, search with and without country codes in both E614 formatting and regular formatting.