| Answer | Crossword Clue |
|---|---|
| AREACODE | Certain three-digit number |
| AREACODE | Three-digit number |
| AREA | ... code (three-digit number) |
| EXT | It often precedes a three-digit number |
| GOOGOL | 101-digit number |
| NINE | Last single-digit number |
| ZIP | Nine-digit number, maybe |
| NINE | Highest one-digit number |
| TEN | First double-digit number |
| SSA | Nine-digit-number issuing org. |
| ZIP | Five- or nine-digit number |
| ZIPCODE | Five- or nine-digit number |
| BINARY | Like two-digit number systems |
| ZIP | Five-digit postal number, informally |
| EXT | No. after a 10 digit number |
| ZIP | Five-digit number on an envelope |
| TITLEIST | Brand name often appearing over a single-digit number |
