Can I transmit here?
Type a frequency, pick your license class and mode. You get a yes or no, the segment, the power limit and the rule.
How it decides
The checker looks up your frequency in the same Part 97 tables our band privilege charts use: which bands each license class may use (47 CFR 97.301), which emission types are allowed in each segment (97.305), and the power limits (97.313). CW is allowed anywhere your class may transmit (97.305(a)). If the answer is no, it tells you which class would be allowed there.
Examples
- 14.230 MHz phone: General and Extra yes, Technician no (Technicians have no 20 m privileges).
- 7.150 MHz phone: Extra yes, General no (General phone on 40 m starts at 7.175 MHz).
- 28.400 MHz phone: Technician yes (Technician phone on 10 m is 28.300 to 28.500 MHz).
- 144.050 MHz phone: no for every class; 144.0 to 144.1 MHz is CW only.
These examples are also our automated test cases. The dial frequency isn't the whole story: your entire signal must stay inside the segment, so the checker warns you within 3 kHz of an edge. Remember to identify every 10 minutes and at the end of a contact (97.119); our station ID timer helps.
Sources
- 47 CFR 97.301 Authorized frequency bands
- 47 CFR 97.305 Authorized emission types
- 47 CFR 97.313 Transmitter power standards
- ARRL band plan (voluntary practice, not law)
Logic checked against the sources above and our test cases on 2026-10-17. Planning aid, not legal, engineering or clinical advice.