Federal Communications Commission (FCC) has granted 461 radio service licenses and call signs in Castro Valley, California. 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 | 268 |
| General Mobile Radio (GMRS) licenses | 97 |
| Vanity licenses | 43 |
| Restricted Operator licenses | 37 |
| Aircraft licenses | 8 |
| Ship Recreational or Voluntarily Equipped licenses | 8 |
