Federal Communications Commission (FCC) has granted 551 radio service licenses and call signs in Columbia, 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 | 321 |
| General Mobile Radio (GMRS) licenses | 87 |
| Vanity licenses | 60 |
| Restricted Operator licenses | 60 |
| Ship Recreational or Voluntarily Equipped licenses | 15 |
| Aircraft licenses | 8 |
