Ordinal number within a table

[Ed Reed]

Is there way to return the ordinal position of a value within a table?
 
Let's say I have a table of phone numbers. Over time the table has had 
additions and deletions. The table has an autonumber ID field. If I sort by the 
ID field I'd like to know what position the number '555-1212' is in the table.
 
Any thoughts?