| Class | Abreviation | Range |
|---|---|---|
| Extremely low frequency | ELF | below 3 kilohertz |
| Very low frequency | VLF | 3 to 30 kilohertz |
| Low frequency | LF | 30 to 300 kilohertz |
| Medium frequency | MF | 300 to 3,000 kilohertz |
| High frequency | HF | 3 to 30 megahertz |
| Very high frequency | VHF | 30 to 300 megahertz |
| Ultrahigh frequency | UHF | 300 to 3,000 megahertz |
| Superhigh frequency | SHF | 3 to 30 gigahertz |
| Extremely high frequency | EHF | 30 to 300 gigahertz |