Federal Communications Commission (FCC) has granted 205 radio service licenses and call signs in Arnold, Maryland. Select a service category from the following table to research licenses and call signs in that category.
| Radio Service Category | Number of Licenses |
|---|---|
| Amateur licenses | 83 |
| Restricted Operator licenses | 32 |
| Ship Recreational or Voluntarily Equipped licenses | 32 |
| General Mobile Radio (GMRS) licenses | 29 |
| Vanity licenses | 19 |
| Aircraft licenses | 5 |
| Ship Compulsory Equipped licenses | 5 |
