Below are frequencies used by the INS (or so I'm told.) I live pretty far from any border so I haven't bothered to try any of them.
If anybody hears anything interesting on one of them, let me know.
| INS Frequencies |
|---|
| 162.825 | 162.85 | 162.875 | 162.9 |
162.925 | 162.95 | 162.975 | 163.05 |
| 163.1 | 163.375 | 163.55 | 163.6 |
| 163.625** | 163.65** | 163.6625 | 163.675** |
| 163.7** | 163.725** | 163.75** | 163.775** |
| 164.115 | 165.825** | 165.85** | 165.875** |
| 165.9 | 165.925 | 165.975** | 168.35 |
| 168.825 | 168.85 | 168.875** | 168.9** |
| 168.925** | 168.95** | 168.975** | 169.6 |
| 170.675 | 170.7 | 170.75 | 413.55 |
| 413.6 | 413.625 | 413.65 | 413.675 |
| 413.7 | 417.05 | 418.85 | 418.875 |
| 418.975 |
** Typically Used as Repeater Frequencies