Maidenhead grid
FM18jm
28 active licensees across 1 ZIP codes centered in this square. Each dot is a ZIP code, sized by licensee count.
ZIP codes
| ZIP | City | Hams |
|---|---|---|
| 20640 | Indian Head, MD | 28 |
| Site navigation: | |
|---|---|
| K Explanatory notes | |
| 7 Other tools main page | |
| Application notes | |
| Query tools main page | |
| Silent Key callsign harvesting | |
| Web site news (2026-10-03) |
28 active licensees across 1 ZIP codes centered in this square. Each dot is a ZIP code, sized by licensee count.
| ZIP | City | Hams |
|---|---|---|
| 20640 | Indian Head, MD | 28 |