Eight observing bands are currently available observations. They are designated bands 3, 4, 5, 6, 7, 8, 9 and 10. The nominal frequency & wavelength ranges are:
| Band | Frequency Range | Wavelength Range |
| (GHz) | (mm) | |
| 3 | 84-116 | 2.59-3.57 |
| 4 | 125-163 | 1.84-2.40 |
| 5 | 158 - 211 | 1.42 - 1.90 |
| 6 | 211-275 | 1.09-1.42 |
| 7 | 275-373 | 0.80-1.09 |
| 8 | 385-500 | 0.6-0.78 |
| 9 | 602-720 | 0.42-0.5 |
| 10 | 787-950 | 0.32-0.38 |
These are the nominal frequency ranges for continuum observations. The OT will give validation warnings if a) any part of a spw is closer than 30 MHz to the baseband edge or b) more than half of the spw is within (30 MHz + the line width) of the baseband edge.
For more information on the observing bands, frequencies or wavelength ranges available for science observations, refer to the Technical Handbook
Related article: In what order are bands expected to be added?