| Category | Subcategory | Lat | Lon | Range |
|---|---|---|---|---|
| Calhoun County | Calhoun County Government | 39.15988 | -90.67841 | 21 |
| Calhoun County | Calhoun County Rural Water District | 39.15988 | -90.67841 | 21 |
| Calhoun County | Hardin | 39.15762 | -90.6212 | 0.5 |
| Amateur Radio | Miscellaneous | 39.15988 | -90.67841 | 21 |
| Calhoun County | Calhoun Community Unit School District 40 | 39.15988 | -90.67841 | 21 |
