: For privacy, formulas like =RIGHT(A2,4) or ="*** - ** - "&RIGHT(B2,4) are frequently used to hide all but the last four digits.
Because Excel treats long numbers uniquely, these files often use specific formatting to display SSNs correctly: ssn.xlsx
: In many corporate or institutional environments, such a file contains a list of individuals' names alongside their nine-digit Social Security Numbers. : For privacy, formulas like =RIGHT(A2,4) or ="***
: Cells are often set to the "Special" category and "Social Security Number" type to automatically insert dashes (e.g., 000-00-0000 ). : For privacy