A radio band is a block or range of frequencies of radio. Bands are referred to by their frequencies such as a “14 MHz band” or their wavelengths “20 meter band”.
When we talk about amateur radio bands, there are 27 of them. The two bands that most beginner’s focus on are 2 meter/144-148 MHz and the 70 centimeter which is 430-440 MHz.
The local amateur radio stations use 2 meter and 70 centimeter bands; these are the Amateur Radio Emergency Service, the Community Emergency Response Team, and the Radio Amateur Civil Emergency Service.