| Answer | Crossword Clue |
|---|---|
| TEL | The digits: Abbr. |
| NOS | Digits: Abbr. |
| NUMS | Digits: Abbr. |
| NRS | Digits: Abbr. |
| NOS | Digits: abbr. |
| SSN | Nine digits: Abbr. |
| SSN | Personal digits: Abbr. |
| TEL | Abbr. preceding 10 digits |
| NOS | Digits, e.g.: Abbr. |
| SSN | I.R.S. digits: Abbr. |
| SSNS | They have only nine digits (Abbr.) |
| SSN | It has nine digits and two hyphens (abbr.) |
| SSNS | They have nine digits and two hyphens (abbr.) |
| SSN | Until June 25, 2011, its first three digits had geographical significance: Abbr. |
